CN106513599A - Pouring method for high-temperature corrosion resisting alloy electrode ingot - Google Patents
Pouring method for high-temperature corrosion resisting alloy electrode ingot Download PDFInfo
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- CN106513599A CN106513599A CN201610989790.XA CN201610989790A CN106513599A CN 106513599 A CN106513599 A CN 106513599A CN 201610989790 A CN201610989790 A CN 201610989790A CN 106513599 A CN106513599 A CN 106513599A
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- metal pattern
- temperature corrosion
- ingot
- alloy electrode
- pouring
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a pouring method for a high-temperature corrosion resisting alloy electrode ingot, and belongs to the field of special steel smelting. Providing the pouring method for the high-temperature corrosion resisting alloy electrode ingot is the technical purpose needing to be achieved. According to the adopted die casting method, the steel grade of the electrode ingot is UNS N08028; through design of a reasonable metal die, alloy ingot body and riser gating technology parameters and casting powder and heat generating agent adding time and weight are formulated, and finally the shrinkage hole cavity defect below a UNS N08028 alloy dead head is completely eliminated. By the application of the pouring method, an important function is achieved for increasing the alloy yield and stabilizing the subsequent electroslag remelting production. The method is simple, easy to operate, low in production cost and suitable for mass production.
Description
Technical field
The present invention relates to the pouring procedure of high-temperature corrosion-resistant alloy electrode ingot, belongs to special steel field of smelting.
Background technology
UNS N08028 alloys are a kind of nickel alloys, also known as Alloy28 alloys, are the nickel-iron-chromium conjunctions that with the addition of molybdenum and copper
Gold, it has good resistance to reproducibility acid and oxidizing acid, while having preferable resistance to stress corrosion cracking.In addition
Also resistance to spot corrosion and crevice corrosion.Thus can be used for chemical treatment, and pollution control equipment, oil and natural gas pipeline, nuclear fuel
Post processing, gas washing in SA production pickler etc..
When this high-temperature corrosion-resistant alloy is using molding side's ingot or slab ingot Direct Rolling sheet material, easily crack, center is dredged
Pine and the defect such as it is mingled with.At present, main by molding production electrode bar, then electroslag remelting, finally rolls.Through remelting wash heat
Progressively cool down, can obtain being mingled with few, and the low alloy bar material of crackle and rarefaction defect.However, due to the heat of the alloy
The coefficient of expansion is larger, produces the high-temperature corrosion-resistant alloy electrode ingot also many problems by molding.Such as central pipe depth is larger,
Maximum can reach 1m；At rising head, shrinkage cavity radius is larger, more than 250mm.This big shrinkage cavity defect can have a strong impact on electroslag remelting mistake
Stablizing for journey voltage, is unfavorable for the direct motion of electroslag remelting process.Therefore need to cut off longer ingot casting under rising head, seriously reduce
The lumber recovery of the alloy.
At present, there are numerous studies to report the pouring procedure of electrode ingot, such as Hu little Dong etc. to be published in《Special Processes of Metal Castings and coloured
Alloy》Document " simulation of slender electrode ingot coagulation defect ", for 45 steel, adjustment emits appearance than (from 5% to 10%), exothermic mixture
Consumption, and poring rate, optimize diameter 500mm, the internal soundness of high 4500mm electrodes ingot.
Liu Chuwei etc. is published in《Foundry engieering》In document " simulation of loose shrinkage cavity in the cast of Φ 450mm electrodes ingot is ground
Study carefully ", it is published in Solenognathus etc.《Special Processes of Metal Castings and non-ferrous alloy》Document " simulation of the Φ 450mm electrode ingot durations of pouring is ground
Study carefully ", and Zhang Zhen mountain etc. is published in《Foundry engieering》Document " based on Procast Φ 650mm electrode ingots casting program optimize
Research ", this three documents all pass through the duration of pouring for adjusting electrode ingot rising head and ingot body, optimize riser feeding, reduce electricity
Pole ingot shrinkage cavity depth.But the steel grade of document is 9Cr2Mo, has gross differences with high-temperature corrosion-resistant alloy.
The patent of invention of application number 201310174419.4 discloses a kind of pouring procedure of large-section consumable electrode, the skill
Art is primarily directed to tri- steel grades of S44SY, H13 and TSM166, devises a kind of method for pouring injecting electrode ingot, it is therefore an objective to reduce casting
Ingot rolls or is forged into the operation of electrode ingot, and molten steel is directly poured into electrode ingot, reduces production cost.And it is anti-corrosion for high temperature
Alloy UNS N08028, can not prepare molding electrode well using the method.
The content of the invention
For the problems referred to above, present invention solves the technical problem that being to provide a kind of cast side of high-temperature corrosion-resistant alloy electrode ingot
Method, production of the method suitable for high-temperature corrosion-resistant alloy UNS N08028.
The pouring procedure of high-temperature corrosion-resistant alloy electrode ingot of the present invention, using die casting：
The steel grade of the electrode ingot is UNS N08028；
Ingot mould is metal pattern, and metal pattern internal diameter is up-small and down-big, 540～580mm of upper internal diameter, lower internal diameter 590～
630mm, taper 1～1.5%；Metal pattern 100～140mm of thickness suitable for reading, lower mouth thickness are 180～220mm；Metal pattern rising head is high
630～670mm, heat-insulating shield height 630～670mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Using bet method, tapping temperature is 1440～1470 DEG C for cast, and the ingot body duration of pouring is 800～870s, and rising head is poured
The note time >=380s；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, dynamic model time >=4
Hour.
Preferably, the metal pattern upper internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness suitable for reading
Degree 120mm, lower mouth thickness are 200mm；The high 650mm of metal pattern rising head, heat-insulating shield height 650mm, thickness 30mm；Metal pattern is high
4000mm。
Preferably, the riser gating time be 400～500s, 4～5 hours dynamic model time.
Further, preferred ingot body duration of pouring 800s, riser gating time 380s.
Preferably, covering slag 12kg/ is added during cast, cast terminates to add exothermic mixture 16kg/, during dynamic model
Between 4 hours.
Preferably, the addition concrete grammar of the covering slag is：Covering slag is suspended in metal pattern before cast, the bottom of apart from
80～120mm of portion；Preferred distance bottom 100mm.
The material of metal pattern of the present invention is preferably 30# steel.
Preferably, before pouring into a mould, metal pattern is toasted at least 2 hours.
The inventive method formulates alloy pig body and riser gating technological parameter, Yi Jibao by metal pattern reasonable in design
Addition time and the weight of shield slag and exothermic mixture, finally completely eliminates the shrinkage cavity defect under UNS N08028 alloy rising heads.This
The application of invention stablizes follow-up electroslag remelting production with important function for the alloy lumber recovery is improved.This method is simple,
It is easy to operate, low production cost, it is adaptable to big to produce.
Specific embodiment
The pouring procedure of high-temperature corrosion-resistant alloy electrode ingot of the present invention, using die casting：
The steel grade of the electrode ingot is UNS N08028；
Ingot mould is metal pattern, for the ease of being conducted oneself with dignity come the demoulding by electrode ingot, metal pattern internal diameter be it is up-small and down-big, it is suitable for reading in
540～580mm of footpath, 590～630mm of lower internal diameter, taper 1～1.5%；In order to slow down the setting rate on electrode ingot top, gold
Category mould 100～140mm of thickness suitable for reading, lower mouth thickness are 180～220mm；High 630～the 670mm of metal pattern rising head, heat-insulating shield height
630～670mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Cast is 1440～1470 DEG C (i.e. pouring temperature) using bet method, tapping temperature, and liquid alloy is from ladle bottom
The mouth of a river is entered from metal pattern bottom through feed trumpet and mould bottom brick, and a disk can produce 6 ingot castings simultaneously.
In order to rising head region is realized preferably filling, deeper shrinkage cavity is prevented, the ingot body duration of pouring is 800～
870s, riser gating time >=380s；Poring rate can be controlled by slide plate aperture；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, dynamic model time >=4
Hour.
Preferably, the metal pattern upper internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness suitable for reading
Degree 120mm, lower mouth thickness are 200mm；The high 650mm of metal pattern rising head, heat-insulating shield height 650mm, thickness 30mm；Metal pattern is high
4000mm, the metal pattern can produce the electrode ingot that weight is 7.85 tons.
Preferably, the riser gating time be 400～500s, 4～5 hours dynamic model time.
Further, preferred ingot body duration of pouring 800s, riser gating time 380s.
Preferably, covering slag 12kg/ is added during cast, cast terminates to add exothermic mixture 16kg/, during dynamic model
Between 4 hours.
Covering slag can be added at the cast initial stage, specifically operation is：Covering slag is suspended in metal pattern before cast, distance
80～120mm of bottom, preferred distance bottom 100mm.
The material of metal pattern of the present invention is preferably 30# steel.
Preferably, before pouring into a mould, metal pattern is toasted at least 2 hours.
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Embodiment 1
The present embodiment is deaerated using electric furnace smelting+LF stove refines+VOD, has smelted stove UNS N08028 ferrum nickel-base high-temperatures
Corrosion resistant alloy, is poured into a mould using 7.85 tons of electrode ingots.
Go out composition of steel as follows：
C 0.02%；Si 0.5%；Mn 2.3%；P 0.025%；S 0.015%；Cr 27.09%
Mo 3.57%；Cu 1.01%；Ni 31.37%；Remaining is Fe.
The material of metal pattern is 30# steel, and specification is as follows：
Upper internal diameter 560mm；Lower internal diameter 610mm；
The high 4000mm of ingot；The high 650mm of rising head；
Thickness 130mm suitable for reading；Lower mouth thickness is 200mm；
Heat-insulating shield height 650mm；Adiabatic plate thickness 30mm；
Specific requirement is as follows with step：
1450 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (12kg/) is suspended in metal pattern before cast, apart from bottom 100mm；
Ingot body duration of pouring 800s, riser gating time 380s；Exothermic mixture 16kg/ is added at the end of riser gating, is moved
4 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking it is superior in quality.
Embodiment 2
The molten steel composition and metal pattern of the present embodiment employing is with embodiment 1.
Specific requirement is as follows with step：
1470 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (14kg/) is suspended in metal pattern before cast, apart from bottom 120mm；
Ingot body duration of pouring 810s, riser gating time 500s；Exothermic mixture 15kg/ is added at the end of riser gating, is moved
4 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking it is superior in quality.
Embodiment 3
The molten steel composition and metal pattern of the present embodiment employing is with embodiment 1.
Specific requirement is as follows with step：
1440 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (10kg/) is suspended in metal pattern before cast, apart from bottom 80mm；
Ingot body duration of pouring 870s, riser gating time 450s；Exothermic mixture 17kg/ is added at the end of riser gating, is moved
5 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking it is superior in quality.
Claims (8)
1. the pouring procedure of high-temperature corrosion-resistant alloy electrode ingot, using die casting, it is characterised in that：
The steel grade of the electrode ingot is UNS N08028；
Ingot mould is metal pattern, and metal pattern internal diameter is up-small and down-big, 540～580mm of upper internal diameter, 590～630mm of lower internal diameter,
Taper 1～1.5%；Metal pattern 100～140mm of thickness suitable for reading, lower mouth thickness are 180～220mm；Metal pattern rising head is high by 630～
670mm, heat-insulating shield height 630～670mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Using bet method, tapping temperature is 1440～1470 DEG C, and the ingot body duration of pouring is 800～870s, during riser gating for cast
Between >=380s；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, and dynamic model time >=4 are little
When.
2. the pouring procedure of high-temperature corrosion-resistant alloy electrode ingot according to claim 1, it is characterised in that：On the metal pattern
Mouth internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness 120mm suitable for reading, lower mouth thickness are 200mm；Metal
The high 650mm of mould rising head, heat-insulating shield height 650mm, thickness 30mm；The high 4000mm of metal pattern.
3. the pouring procedure of high-temperature corrosion-resistant alloy electrode ingot according to claim 1 and 2, it is characterised in that：Riser gating
Time be 380～500s, 4～5 hours dynamic model time.
4. the pouring procedure of high-temperature corrosion-resistant alloy electrode ingot according to claim 3, it is characterised in that：The ingot body duration of pouring
800s, riser gating time 380s.
5. the pouring procedure of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 4, it is characterised in that：Pour
Covering slag 12kg/ is added during note, cast terminates to add exothermic mixture 16kg/, 4 hours dynamic model time.
6. the pouring procedure of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 5, it is characterised in that：Institute
The addition concrete grammar for stating covering slag is：Covering slag is suspended in metal pattern before cast, apart from 80～120mm of bottom；It is preferred that
Apart from bottom 100mm.
7. the pouring procedure of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 5, it is characterised in that：Institute
The material for stating metal pattern is 30# steel.
8. the pouring procedure of the high-temperature corrosion-resistant alloy electrode ingot according to any one of claim 1～7, it is characterised in that：Pour
Before note, metal pattern is toasted at least 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989790.XA CN106513599A (en) | 2016-11-10 | 2016-11-10 | Pouring method for high-temperature corrosion resisting alloy electrode ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989790.XA CN106513599A (en) | 2016-11-10 | 2016-11-10 | Pouring method for high-temperature corrosion resisting alloy electrode ingot |
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| CN106513599A true CN106513599A (en) | 2017-03-22 |
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| CN201610989790.XA Pending CN106513599A (en) | 2016-11-10 | 2016-11-10 | Pouring method for high-temperature corrosion resisting alloy electrode ingot |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331087A (en) * | 2020-04-22 | 2020-06-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting heat insulation plate mounting structure and die casting demolding method |
| CN111390127A (en) * | 2020-04-22 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting cap port shell mounting structure and die casting pouring method |
| CN111482561A (en) * | 2020-04-22 | 2020-08-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting device and die casting production method |
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|---|---|---|---|---|
| EP1889675A1 (en) * | 2005-06-09 | 2008-02-20 | Daido Tokushuko Kabushiki Kaisha | Process for producing ingot |
| CN103231029A (en) * | 2013-05-13 | 2013-08-07 | 山西太钢不锈钢股份有限公司 | Pouring method for large-section consumable electrode |
| CN103252461A (en) * | 2013-05-13 | 2013-08-21 | 山西太钢不锈钢股份有限公司 | Method for pouring electrode billet |
| CN104152709A (en) * | 2014-08-18 | 2014-11-19 | 洛阳双瑞特种装备有限公司 | Production process for corrosion resistant alloy electroslag remelting slab with thickness smaller than 200 mm and equipment |
| CN104212977A (en) * | 2014-09-15 | 2014-12-17 | 洛阳双瑞特种装备有限公司 | Ti element control method for Ti-contained corrosion resistant alloy ingot extracting electroslag remelting slab |
-
2016
- 2016-11-10 CN CN201610989790.XA patent/CN106513599A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1889675A1 (en) * | 2005-06-09 | 2008-02-20 | Daido Tokushuko Kabushiki Kaisha | Process for producing ingot |
| CN103231029A (en) * | 2013-05-13 | 2013-08-07 | 山西太钢不锈钢股份有限公司 | Pouring method for large-section consumable electrode |
| CN103252461A (en) * | 2013-05-13 | 2013-08-21 | 山西太钢不锈钢股份有限公司 | Method for pouring electrode billet |
| CN104152709A (en) * | 2014-08-18 | 2014-11-19 | 洛阳双瑞特种装备有限公司 | Production process for corrosion resistant alloy electroslag remelting slab with thickness smaller than 200 mm and equipment |
| CN104212977A (en) * | 2014-09-15 | 2014-12-17 | 洛阳双瑞特种装备有限公司 | Ti element control method for Ti-contained corrosion resistant alloy ingot extracting electroslag remelting slab |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331087A (en) * | 2020-04-22 | 2020-06-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting heat insulation plate mounting structure and die casting demolding method |
| CN111390127A (en) * | 2020-04-22 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting cap port shell mounting structure and die casting pouring method |
| CN111482561A (en) * | 2020-04-22 | 2020-08-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting device and die casting production method |
| CN111482561B (en) * | 2020-04-22 | 2021-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting device and die casting production method |
| CN111390127B (en) * | 2020-04-22 | 2021-10-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting cap port shell mounting structure and die casting pouring method |
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Application publication date: 20170322 |