CN100439523C - Process for preparing high-performance molybdenum bar - Google Patents
Process for preparing high-performance molybdenum bar Download PDFInfo
- Publication number
- CN100439523C CN100439523C CNB2006101657389A CN200610165738A CN100439523C CN 100439523 C CN100439523 C CN 100439523C CN B2006101657389 A CNB2006101657389 A CN B2006101657389A CN 200610165738 A CN200610165738 A CN 200610165738A CN 100439523 C CN100439523 C CN 100439523C
- Authority
- CN
- China
- Prior art keywords
- temperature
- molybdenum bar
- minutes
- die forging
- hydrogen furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Forging (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparing method of high-mechanic property molybdenum rod, which comprises the following steps: heating powder metallurgical sintered molybdenum rod in the hydrogen furnace; stamping; cogging; forging; setting the manufacturing rate of first fire at 64-70%; annealing; stamping; setting the manufacturing rate at 28-32%; stamping; setting the forging rate at 25-30%; controlling the terminal forging temperature more than 750 Deg C; aligning on the platform; eliminating stress in the hydrogen furnace at 950 Deg C for 10 min; annealing.
Description
Technical field
A kind of method for preparing high-performance molybdenum bar relates to a kind of molybdenum bar material of powder metallurgy sintered forged high-mechanical property, especially applicable to the preparation high-performance molybdenum bar method that has than high-mechanical property requirement occasion.
Background technology
Pure molybdenum bar is a kind of common molybdenum processing material, has high-melting-point, high strength and Young's modulus, and the coefficient of expansion is little, and steam forces down, and conduction, thermal conductivity well reach outstanding corrosion resistance, are to use one of the highest metallic substance of temperature.Be widely used in heat resistant structure spare, electronic component, lamp anode, various electrode, glass industry part, electrode etc.But under general state, molybdenum is the big material of a kind of low temperature brittleness, and the pure molybdenum bar of common method processing also has undercapacity, and fragility is big, the problem of mechanical cutting poor processability.
Summary of the invention
The objective of the invention is deficiency, provide a kind of and can effectively improve intensity, reduction fragility, improve the high-performance molybdenum bar preparation method of mechanical cutting processing characteristics at above-mentioned prior art existence.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method for preparing high-performance molybdenum bar, it is characterized in that its preparation process for powder metallurgy sintered molybdenum bar in hydrogen furnace under 1350 ℃ of temperature, heated 1.5 hours; Carry out the die forging cogging then and forge, the first fire time working modulus is 64%～70%; And then under 1200 ℃ of temperature, tempering 5 minutes; Die forging again, working modulus are 28%～32%; Again under 1100 ℃ of temperature, tempering 5 minutes, die forging again, working modulus is 25%～30%; Control final forging temperature greater than 750 ℃, platform alignment while hot; In hydrogen furnace, do at last 950 ℃/10 minutes stress-removal anneal.
Method of the present invention, distortion through the big working modulus of Dan Huoci, and the cooling in turn of accurate temperature controlling distortion, the fully broken crystal grain of metal inside, formed significant fibrous vertical worked structure, through stress-removal annealing, bar has the favorable mechanical performance, tensile strength is greater than 630MPa, and unit elongation is greater than 20%.
Embodiment
A kind of method for preparing high-performance molybdenum bar, its preparation process be with powder metallurgy sintered molybdenum bar in hydrogen furnace under 1350 ℃ of temperature, heated 1.5 hours; Carry out the die forging cogging then and forge, the first fire time working modulus is 64%～70%; And then under 1200 ℃ of temperature, tempering 5 minutes; Die forging again, working modulus are 28%～32%; Again under 1100 ℃ of temperature, tempering 5 minutes, die forging again, working modulus is 25%～30%; Control final forging temperature greater than 750 ℃, platform alignment while hot; In hydrogen furnace, do at last 950 ℃/10 minutes stress-removal anneal.It is big that this molybdenum bar has intensity, and plasticity is good, the advantage of mechanical cutting good processability.It is characterized in that: tensile strength is greater than 630MPa, and unit elongation is greater than 20%, and a brilliant number is greater than 1500/mm2, and density is greater than 10.12g/cm3.It is fibrous that fracture is, and molybdenum bar drops on solid cement flooring, has limpid sound.
Embodiment 1
Adopt powder metallurgy sintered molybdenum bar base to answer the requirement of accord with Q/XY1202-2002 standard.The blank outward appearance: Φ 50-Φ 55 * L, individual cigarette weight is the 5-5.5 kilogram, and excellent blank outer surface should be slick and sly, straight, and physical dimension meets processing requirement.Do not allow pit or the protruding scar of the degree of depth greater than 3mm.Above excellent base is packed into, have in the molybdenum filament hydrogen furnace of thermocouple temperature measurement and heat Heating temperature 1350 ℃/1.5 hours, using 750 kg of air per kg of water evaporated hammer to carry out the die forging cogging forges, the first fire time working modulus is 64%～70%, and die forging is interrupted to Φ 30 * L, in another hydrogen furnace, carry out tempering in 1200 ℃/5 minutes then, die forging Φ 25 * L, tempering in 1100 ℃/5 minutes, die forging Φ 21 * L, final forging temperature is greater than 750 ℃, platform alignment while hot.Do 950 ℃/10 minutes stress-removal anneal then in the hydrogen furnace.Last machine adds finished product Φ 19.5 * (+0.3 ,-0) 〉=500mm.Through the distortion of Dan Huoci big working modulus, and the cooling in turn of accurate temperature controlling distortion, the broken fully crystal grain of metal inside has formed significant fibrous vertical worked structure, and through stress-removal annealing, bar has the favorable mechanical performance.
Embodiment 2
Use the qualified molybdenum bar base of Φ 50 * 250mm, through heating in 1350 ℃/1.5 hours, first fire 4 falls mould and gets to Φ 30 * L from Φ 50 * L, interrupt then tempering in 1200 ℃/5 minutes, die forging Φ 25 * L, tempering in 1100 ℃/5 minutes, die forging Φ 21 * L, in forge temperature greater than 750 ℃, platform alignment while hot.Do 950 ℃/10 minutes stress-removal anneal then in the hydrogen furnace.Last machine adds finished product Φ 19.5 * (+0.3 ,-0) 〉=500mm.Detect performance: tensile strength equals 660MPa, and unit elongation equals 31%, and a brilliant number equals 1500/mm
2, density equals 10.19g/cm
3
Embodiment 3
Use the qualified molybdenum bar base of Φ 55 * 250mm, through heating in 1350 ℃/1.5 hours, first fire 5 falls mould and gets to Φ 30 * L from Φ 50 * L, interrupt, then at tempering in 1200 ℃/5 minutes, die forging Φ 25 * L, tempering in 1100 ℃/5 minutes, die forging Φ 21 * L, final forging temperature is greater than 750 ℃, platform alignment while hot.Do 950 ℃/10 minutes stress-removal anneal then in the hydrogen furnace.Last machine adds finished product Φ 19.5 * (+0.3 ,-0) 〉=500mm.Detect performance: tensile strength equals 675MPa, and unit elongation equals 34%, and a brilliant number equals 1800/mm
2, density equals 10.21g/cm
3
The high performance molybdenum bar that uses present method to produce is as negative electrode target rotor.Compare with the rotor that common molybdenum bar is made, good processability, the life-span extends greatly, obtains good result.
Claims (1)
1. method for preparing high-performance molybdenum bar, it is characterized in that its preparation process for powder metallurgy sintered molybdenum bar in hydrogen furnace under 1350 ℃ of temperature, heated 1.5 hours; Carry out the die forging cogging then and forge, the first fire time working modulus is 64%～70%; And then under 1200 ℃ of temperature, tempering 5 minutes; Die forging again, working modulus are 28%～32%; Again under 1100 ℃ of temperature, tempering 5 minutes, die forging again, working modulus is 25%～30%; Control final forging temperature greater than 750 ℃, platform alignment while hot; The last stress-removal anneal of in hydrogen furnace, being 950 ℃/10min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101657389A CN100439523C (en) | 2006-12-15 | 2006-12-15 | Process for preparing high-performance molybdenum bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101657389A CN100439523C (en) | 2006-12-15 | 2006-12-15 | Process for preparing high-performance molybdenum bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1962909A CN1962909A (en) | 2007-05-16 |
| CN100439523C true CN100439523C (en) | 2008-12-03 |
Family
ID=38082135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101657389A Active CN100439523C (en) | 2006-12-15 | 2006-12-15 | Process for preparing high-performance molybdenum bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100439523C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108356190A (en) * | 2018-01-31 | 2018-08-03 | 金堆城钼业股份有限公司 | A method of big specification molybdenum electrode is produced using large piece weight molybdenum stick |
| CN110722152B (en) * | 2019-10-29 | 2022-05-03 | 安泰天龙钨钼科技有限公司 | Large-size fine-grain molybdenum rod and preparation method thereof |
| CN113088847B (en) * | 2021-04-16 | 2022-04-15 | 中南大学 | Preparation method of high-density high-toughness ultrafine-grained molybdenum |
| CN113828773B (en) * | 2021-05-25 | 2023-08-15 | 有研工程技术研究院有限公司 | Molybdenum rod for vacuum electronic device and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4077811A (en) * | 1977-03-01 | 1978-03-07 | Amax, Inc. | Process for "Black Fabrication" of molybdenum and molybdenum alloy wrought products |
| JPH06212376A (en) * | 1992-05-15 | 1994-08-02 | Japan Energy Corp | Production of rod, wire or tube of molybdenum or molybdenum alloy |
| CN1876874A (en) * | 2006-07-06 | 2006-12-13 | 金堆城钼业集团有限公司 | Mo-La-Ce rare earth molybdenum alloy wire and preparation method thereof |
-
2006
- 2006-12-15 CN CNB2006101657389A patent/CN100439523C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4077811A (en) * | 1977-03-01 | 1978-03-07 | Amax, Inc. | Process for "Black Fabrication" of molybdenum and molybdenum alloy wrought products |
| JPH06212376A (en) * | 1992-05-15 | 1994-08-02 | Japan Energy Corp | Production of rod, wire or tube of molybdenum or molybdenum alloy |
| CN1876874A (en) * | 2006-07-06 | 2006-12-13 | 金堆城钼业集团有限公司 | Mo-La-Ce rare earth molybdenum alloy wire and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 粉冶纯钼棒的精密锻造探索. 张德尧.稀有金属，第1期. 1990 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1962909A (en) | 2007-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106282836B (en) | Steam turbine 2Cr11MoVNbN forging and its manufacturing method | |
| CN105506525B (en) | Preparation method of Ti2AlNb-based alloy large-size uniform fine-grain bar | |
| JP5050226B2 (en) | Manufacturing method of copper alloy material | |
| CN101941039B (en) | High-strength aluminum alloy isothermal direction-change open die forging method and device | |
| CN106756582B (en) | A kind of enhanced low-expansion alloy of intermetallic compound and preparation method | |
| CN101708527B (en) | Forging technology of particle-reinforced aluminum-based composite material | |
| CN105441840B (en) | A kind of hammering cogging method of high-strength heat-resistant magnesium alloy ingot casting | |
| CN101927312A (en) | Method for processing TC4 titanium alloy into forged rings | |
| CN100439523C (en) | Process for preparing high-performance molybdenum bar | |
| CN106148762B (en) | A kind of preparation method of low temperature TA7 DT titanium alloy rod bars | |
| CN111118422B (en) | Preparation method of high-tungsten high-cobalt nickel alloy fine-grain plate | |
| CN105861942B (en) | A kind of cold work die steel and its preparation technology | |
| CN102747281A (en) | Batch annealing interstitial-free (IF) steel and production method thereof | |
| JP4476787B2 (en) | Method for producing magnesium alloy sheet with excellent press formability | |
| CN109487116A (en) | High-strength CTB alloy band and preparation method suitable for electrically conductive elastic component | |
| CN108441613A (en) | A kind of anti-white point control method of age-hardening plastic mould steel | |
| CN107523795A (en) | A kind of manufacture method of titanium target material | |
| CN107234196A (en) | The atomic ratio Ti-Ni alloy large-sized casting ingot forging method such as one kind | |
| CN106399861A (en) | Alloy for high-pressure eighth-grade partition board outer ring and forging method of outer ring | |
| CN107716840B (en) | Production process of ring forging | |
| CN106086734B (en) | The forging method of 2618A aluminum alloy impeller forging | |
| CN108179357A (en) | A kind of enhanced low-expansion alloy of carbide | |
| CN107217163B (en) | A kind of TB13 titanium alloy smeltings and cogging forging method | |
| CN105583251B (en) | A kind of forging method of big specification Inconel690 alloy bar materials | |
| CN101649438A (en) | Heat treatment method of target material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Refra Tungsten & Molybdenum Co., Ltd. Assignor: Xibu Metal Material Co., Ltd. Contract record no.: 2011610000054 Denomination of invention: Process for preparing high-performance molybdenum bar Granted publication date: 20081203 License type: Exclusive License Open date: 20070516 Record date: 20110629 |