CN107740002A - A kind of novel control nitrogen austenitic stainless steel and preparation method thereof - Google Patents
A kind of novel control nitrogen austenitic stainless steel and preparation method thereof Download PDFInfo
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- CN107740002A CN107740002A CN201710440345.2A CN201710440345A CN107740002A CN 107740002 A CN107740002 A CN 107740002A CN 201710440345 A CN201710440345 A CN 201710440345A CN 107740002 A CN107740002 A CN 107740002A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
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Abstract
The invention discloses a kind of new nitrogen-containing austenitic stainless steel.This method is made that clear stipulaties to the alloying component for controlling nitrogen austenitic stainless steel, and is manufactured using Laser Clad Deposition manufacturing technology.The control nitrogen austenitic stainless steel microscopic structure is the tiny column druse of size, has a MPa of room-temperature yield strength Rp0.2 >=300,350 DEG C of yield strength Rp0.2 >=190 MPa, room temperature impact toughness KV2≥260 J；Without intercrystalline corrosion phenomenon after 500~650 DEG C are incubated 1 ~ 2 hour sensitized treatment.
Description
Technical field
The invention belongs to material processing and laser manufacturing field, it is related to a kind of novel control nitrogen austenitic stainless steel and its preparation
Method.
Background technology
Control nitrogen austenitic stainless steel has excellent decay resistance, and intensity and corrosion resistance are good fit, structure system
Good manufacturability is made, is the preferred material of engineering structure part.Z2CN19-10 (N) austenitic stainless steel in RCC-M standards is with it
Good chemical composition, mechanical property, decay resistance, structure stability and good anti-neutron irradiation performance and be widely used in
The key equipment of nuclear power station, such as the in-pile component in nuclear island reactor, CRDM, safety injection tank and some are supporting
Support member.
Z2CN19-10 (N) austenite stainless product made from steel is mainly carried out by techniques such as casting, forging, rolling and welding
Manufacture, technique is more ripe, and properties of product have formulated relevant criterion.But the overweight control nitrogen Ovshinsky of traditional handicraft manufacture super thick
During body stainless steel materials, there is the problem of ingot casting uneven components.
Laser gain material manufacturing technology is a kind of brand-new manufacturing technology.The technology using high quality LASER Light Source as thermal source, with
Powder or silk material are raw material, and successively accumulating cumulative method according to set shape and rule under the control of the computer manufactures
Entity products.It is welded to make blank and machine again relative to traditional first casting/forging/and subtracts material manufacture, the techniqueflow is short, from part
It is casted into monolithic molding to settle at one go, reduces a large amount of intermediate steps；Product grains size is tiny, and composition is uniform, dense structure, tool
There is good comprehensive mechanical property；To product design quick response, highly flexible, eliminate and molding side is wasted in conventional art
The time in face；Laser heat source energy force density is concentrated, it is possible to achieve extremely unmanageable W, Nb, Ta, Ti, Zr, Mo etc. in traditional handicraft
Infusibility, high activity metal shape；The manufacture of the product members such as more materials, graded composite can also be realized.
The content of the invention
The present invention provides one kind using laser gain material manufacturing technology manufacture novel control nitrogen austenitic stainless steel product and its system
Make method.The method by effective control to material composition and the reasonable selection of laser gain material manufacturing technology process, preparation
Performance of austenitic stainless steel is notable, and its room temperature and mechanical behavior under high temperature are above forging；With significant anti intercrystalline corrosion performance.
To achieve the above object, the technical solution adopted by the present invention is as follows.
A kind of novel control nitrogen austenitic stainless steel, the stainless composition of steel are：0.02 wt%≤C≤0.035 wt%,Si≤
1.00 wt%, Mn≤2.00 wt%, P≤0.03 wt%, S≤0.015 wt%, 18.50 wt%≤Cr≤20.00wt%, 9.00
Wt%≤Ni≤10 wt%, B≤0.0018wt%, Co≤0.1 wt%, Cu≤1.00 wt%, 0.06 wt.%≤N≤0.08
Wt%, surplus is Fe and inevitable impurity, and total impurities are no more than 0.05wt%；Microscopic structure is pure austenite.
The optimal technical scheme of novel control nitrogen austenitic stainless steel of the present invention is the stainless steel, and room temperature yield is strong
Spend Rp0.2>=300 MPa, 350 DEG C of yield strength Rp0.2>=190 MPa, room temperature impact toughness KV2≥260 J；Through 500~650 DEG C
It is incubated after 1 ~ 2 hour sensitized treatment without intercrystalline corrosion phenomenon.
The optimal technical scheme of novel control nitrogen austenitic stainless steel of the present invention is the Ovshinsky of the austenitic stainless steel
Body is organized as column crystal, and crystal grain diameter is less than 10 μm；The column crystal of same orientation forms a cluster, and each cluster size is
0.5~1.0mm。
The optimal technical scheme of novel control nitrogen austenitic stainless steel of the present invention is the Ovshinsky of the austenitic stainless steel
Between 10 ° ~ 45 ° of the adjacent druse angle of body tissue column crystal.
The optimal technical scheme of novel control nitrogen austenitic stainless steel of the present invention is that the austenitic stainless steel is using sharp
It is prepared by light cladding deposit manufacture technology.
The invention further relates to the preparation method of the novel control nitrogen austenitic stainless steel, the preparation method uses powder skill processed
Spherical powder is made in the qualified austenite stainless steel ingot of composition by art；Product is prepared using Laser Clad Deposition manufacturing technology；To production
Product are heat-treated, and finished product is made.
The optimal technical scheme of preparation method of the present invention is austenite stainless steel ball shape made from the powder-making technique
The granularity of powder is 75 μm ~ 250 μm, and D50 is 150 μm, and D90≤200 μm, hollow powder rate is less than 0.1%.
The optimal technical scheme of preparation method of the present invention is, the technique of the Laser Clad Deposition manufacturing technology is,
Laser power is 1000W ~ 10000W, and spot size is φ 3 ~ φ 6mm, and laser scanning speed is 6mm/s ~ 20mm/s, deposition effect
Rate is 300g/h ~ 800g/h, overlapping rate 30% ~ 40%.
The optimal technical scheme of preparation method of the present invention is, the technique of the Laser Clad Deposition manufacturing technology is,
Laser power 2000W ~ 3000W, spot diameter φ 3mm, laser scanning speed 6mm/s ~ 12mm/s, [y1] deposition efficiency are 500
The g/h of g/h ~ 700, overlapping rate 30% ~ 40%.
The optimal technical scheme of preparation method of the present invention is that the Technology for Heating Processing is 300 DEG C ~ 550 DEG C and entered to temperature
Stove, it is incubated 30min ~ 120min, air cooling.
The advantageous effects of the present invention are the control nitrogen austenitic stainless steel manufactured using the above method, its microscopic structure
For the tiny column druse of size, there are the MPa of room-temperature yield strength Rp0.2 >=300,350 DEG C of yield strength Rp0.2 >=190
MPa, room temperature impact toughness KV2≥260 J；Without intercrystalline corrosion phenomenon after 500~650 DEG C are incubated 1 ~ 2 hour sensitized treatment.Institute
Forging is above with its room temperature and mechanical behavior under high temperature；Anti intercrystalline corrosion performance is notable, and it is special to meet to have corrosive nature
It is required that application demand.
Illustrate book
Fig. 1 is the metallograph of control nitrogen austenitic stainless steel prepared by the present invention.
Specific embodiment
Embodiment 1：
Powder Z2CN19-10 processed（N）It is as shown in table 1 to control nitrogen austenitic stainless steel raw material chemical composition.
1.1 powder processed of table Z2CN19-10 (N) controls nitrogen austenitic stainless steel raw material chemical composition
| Elements | C | Cr | Co | P | Ni | B |
| Standard | ≤0.035 | 18.5~20 | ≤0.1 | ≤0.03 | 9.0~10 | ≤0.0018 |
| Actual measurement | 0.024 | 19.08 | 0.036 | 0.005 | 9.3 | 0.001 |
| Elements | Mn | Si | S | Cu | N | Fe |
| Standard | ≤2 | ≤1 | ≤0.015 | ≤1 | 0.06~0.08 | Surplus |
| Actual measurement | 1.12 | 0.42 | 0.002 | 0.13 | 0.07 |
Powder is prepared using plasma rotating electrode process, the granularity of its powder is 75 μm ~ 250 μm, and D50 is 150 μm, D90≤200
μm, hollow powder rate is 0.07%.
Then Laser Clad Deposition manufacture control nitrogen austenitic stainless steel, stainless steel substrate size are carried out on stainless steel substrate
For the mm of the mm of 30 mm × 50 × 250.
The technological parameter of Laser Clad Deposition manufacture is that spot diameter is φ 6 mm, laser power 10000W, and scanning is fast
Spend for 20mm/m, the g/h of deposition efficiency 800, overlapping rate 40%, the mm of single pass deposit thickness 1.2.Manufacture control nitrogen austenitic is not
Become rusty 5 pieces of steel, and its size is：The mm of the mm of 35 mm × 85 × 110, Technology for Heating Processing are：550 DEG C of insulation 120min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Fig. 1 show metallograph.As seen from the figure, the stainless steel is the pure austenitic microstructure of column.The life of column crystal
Length direction is not perfect vertical upward generally along longitudinal direction, but angle of inclination be present, and the fine columnar of same angle is brilliant
Constitute a column druse.Single column crystal diameter is no more than 10 μm, and the column crystal of same orientation forms a cluster, each
Cluster size is 0.5 ~ 1.0mm；Angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 2.
The mechanical property of table 2 and intercrystalline corrosion test result.
Embodiment 2
Using the same batch powder of embodiment 1, Laser Clad Deposition manufacture test specimens block experiment is carried out on stainless steel substrate.No
Rust steel substrate size：30 mm×50 mm×250 mm.
The technological parameter of Laser Clad Deposition manufacture is that spot diameter is φ 6 mm, laser power 6000W, and scanning is fast
Spend for 14mm/m, the g/h of deposition efficiency 800, overlapping rate 40%, the mm of single pass deposit thickness 1.0.Manufacture 5 pieces of test specimens block, sample
Block size is：35 mm×85 mm×110 mm.The Technology for Heating Processing of test specimens block is 550 DEG C of insulation 120min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Metallograph is similar to embodiment Fig. 1, is the pure austenitic microstructure of column.The direction of growth of column crystal is generally
Along longitudinal direction, but it is not perfect vertical upward, but angle of inclination is present, the fine columnar crystalline substance of same angle constitutes a post
Shape druse.Single column crystal diameter is no more than 10 μm, and angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 3.
The mechanical property of table 3 and intercrystalline corrosion test result.
Embodiment 3
Using the same batch powder of embodiment 1, Laser Clad Deposition manufacture test specimens block experiment is carried out on stainless steel substrate.No
Rust steel substrate size：30 mm×50 mm×250 mm.
Technological parameter is used as spot diameter is φ 6 mm, laser power 5000W, sweep speed 6mm/m, is deposited
The g/h of efficiency 600, overlapping rate 30%, the mm of single pass deposit thickness 0.8.5 pieces of test specimens block is manufactured, sample block size is：35 mm×
85 mm×110 mm.The Technology for Heating Processing of test specimens block is for 550 DEG C are incubated 30min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Metallograph is similar to embodiment Fig. 1, is the pure austenitic microstructure of column.The direction of growth of column crystal is generally
Along longitudinal direction, but it is not perfect vertical upward, but angle of inclination is present, the fine columnar crystalline substance of same angle constitutes a post
Shape druse.Single column crystal diameter is no more than 10 μm, and angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 4.
The mechanical property of table 4 and intercrystalline corrosion test result.
Embodiment 4
Using the same batch powder of embodiment 1, Laser Clad Deposition manufacture test specimens block experiment is carried out on stainless steel substrate.No
Rust steel substrate size：30 mm×50 mm×250 mm.
The technological parameter of Laser Clad Deposition manufacture is that spot diameter is φ 3 mm, laser power 3000W, and scanning is fast
Spend for 12mm/m, the g/h of deposition efficiency 700, overlapping rate 40%, single pass deposition thickness 1.2 mm.Manufacture 5 pieces of test specimens block, sample
Block size is：35 mm×85 mm×110 mm.The Technology for Heating Processing of test specimens block is 300 DEG C of insulation 120min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Metallograph is similar to embodiment Fig. 1, is the pure austenitic microstructure of column.The direction of growth of column crystal is generally
Along longitudinal direction, but it is not perfect vertical upward, but angle of inclination is present, the fine columnar crystalline substance of same angle constitutes a post
Shape druse.Single column crystal diameter is no more than 10 μm, and angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 5.
The mechanical property of table 5 and intercrystalline corrosion test result.
Embodiment 5
Using the same batch powder of embodiment 1, Laser Clad Deposition manufacture test specimens block experiment is carried out on stainless steel substrate.No
Rust steel substrate size：30 mm×50 mm×250 mm.
Using technological parameter：Spot diameter is φ 2 mm, laser power 2000W, sweep speed 6mm/m, and deposition is imitated
The g/h of rate 500, overlapping rate 30%, the mm of single pass deposit thickness 0.7.5 pieces of test specimens block is manufactured, sample block size is：35 mm×
85 mm×110 mm.The Technology for Heating Processing of test specimens block is 550 DEG C of insulation 30min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Metallograph is similar to embodiment Fig. 1, is the pure austenitic microstructure of column.The direction of growth of column crystal is generally
Along longitudinal direction, but it is not perfect vertical upward, but angle of inclination is present, the fine columnar crystalline substance of same angle constitutes a post
Shape druse.Single column crystal diameter is no more than 10 μm, and angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 6.
The mechanical property of table 6 and intercrystalline corrosion test result.
Embodiment 6
Using the same batch powder of embodiment 1, Laser Clad Deposition manufacture test specimens block experiment is carried out on stainless steel substrate.No
Rust steel substrate size：30 mm×50 mm×250 mm.
Using technological parameter：Spot diameter is φ 3 mm, laser power 1000W, sweep speed 6mm/m, and deposition is imitated
The g/h of rate 300, overlapping rate 30%, the mm of single pass deposit thickness 0.4.5 pieces of test specimens block is manufactured, sample block size is：35 mm×
85 mm×110 mm.The Technology for Heating Processing of test specimens block is 550 DEG C of insulation 30min, air cooling.
Observation metallographic simultaneously tests mechanical property, and according to《The corrosion stainless steel of GB/T 4334-2008 metals and alloy
Huey test method》In standard method E carry out intercrystalline corrosion test.
Metallograph is similar to embodiment Fig. 1, is the pure austenitic microstructure of column.The direction of growth of column crystal is generally
Along longitudinal direction, but it is not perfect vertical upward, but angle of inclination is present, the fine columnar crystalline substance of same angle constitutes a post
Shape druse.Single column crystal diameter is no more than 10 μm, and angle is 10 ° ~ 45 ° between column druse.
Mechanical property and intercrystalline corrosion test result are as shown in table 4.
The mechanical property of table 4 and intercrystalline corrosion test result.
In summary, protected in the present invention using the novel control nitrogen austenitic stainless steel of laser gain material manufacturing process manufacture in composition
Hold it is consistent under conditions of, there is the crystallite dimension and double-layered structure architectural feature more tiny than rolled plate and forging, normal temperature with
High-temperature yield strength and impact flexibility are significantly improved, and anti intercrystalline corrosion performance is good.
Claims (10)
- A kind of 1. novel control nitrogen austenitic stainless steel, it is characterised in that：The stainless composition of steel is：0.02 wt%≤C≤0.035 Wt%, Si≤1.00 wt%, Mn≤2.00 wt%, P≤0.03 wt%, S≤0.015 wt%, 18.50 wt%≤Cr≤ 20.00wt%, 9.00 wt%≤Ni≤10 wt%, B≤0.0018wt%, Co≤0.1 wt%, Cu≤1.00 wt%, 0.06 The wt% of wt.%≤N≤0.08, surplus is Fe and inevitable impurity, and total impurities are no more than 0.05wt%；Microscopic structure is Pure austenite.
- 2. novel control nitrogen austenitic stainless steel according to claim 1, it is characterised in that：The stainless steel, room temperature yield are strong Spend Rp0.2>=300 MPa, 350 DEG C of yield strength Rp0.2>=190 MPa, room temperature impact toughness KV2≥260 J；Through 500~650 DEG C It is incubated after 1 ~ 2 hour sensitized treatment without intercrystalline corrosion phenomenon.
- 3. novel control nitrogen austenitic stainless steel according to claim 1, it is characterised in that：The Ovshinsky of the austenitic stainless steel Body is organized as column crystal, and crystal grain diameter is less than 10 μm；The column crystal of same orientation forms a cluster, and each cluster size is 0.5~1.0 mm。
- 4. novel control nitrogen austenitic stainless steel according to claim 1, it is characterised in that：The Ovshinsky of the austenitic stainless steel Between 10 ° ~ 45 ° of the adjacent druse angle of body tissue column crystal.
- 5. novel control nitrogen austenitic stainless steel according to claim 1, it is characterised in that：The austenitic stainless steel is using sharp It is prepared by light cladding deposit manufacture technology.
- 6. the preparation method of novel control nitrogen austenitic stainless steel as claimed in claim 1, it is characterised in that：The preparation method The qualified austenite stainless steel ingot of composition is made by spherical powder using powder-making technique；Prepared using Laser Clad Deposition manufacturing technology Product；Product is heat-treated, finished product is made.
- 7. the preparation method of novel control nitrogen austenitic stainless steel according to claim 6, it is characterised in that：The powder skill processed The granularity of austenitic stainless steel spherical powder made from art is 75 μm ~ 250 μm, and D50 is 150 μm, D90≤200 μm, hollow powder rate Less than 0.1%.
- 8. the preparation method of novel control nitrogen austenitic stainless steel according to claim 6, it is characterised in that：The laser melts The technique for changing deposit manufacture technology is that laser power is 1000W ~ 10000W, and spot size is φ 3 ~ φ 6mm, and laser scanning is fast Spend for 6mm/s ~ 20mm/s, deposition efficiency is 300g/h ~ 800g/h, overlapping rate 30% ~ 40%.
- 9. the preparation method of novel control nitrogen austenitic stainless steel according to claim 6, it is characterised in that：The laser melts The technique for changing deposit manufacture technology is laser power 2000W ~ 3000W, spot diameter φ 3mm, laser scanning speed 6mm/s ~ 12mm/s, [y1] deposition efficiency are the g/h of 500 g/h ~ 700, overlapping rate 30% ~ 40%.
- 10. the preparation method of novel control nitrogen austenitic stainless steel according to claim 6, it is characterised in that：At the heat Science and engineering skill is 300 DEG C ~ 550 DEG C to temperature and enters stove, is incubated 30min ~ 120min, air cooling.
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| CN109504832A (en) * | 2018-12-22 | 2019-03-22 | 中南大学 | A kind of copper zirconium enhancing austenitic stainless steel against corrosion and preparation method thereof |
| JP2019210523A (en) * | 2018-06-06 | 2019-12-12 | 株式会社日立製作所 | Austenite stainless steel and in-reactor structure |
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