CN105983698A - Powder forging method for forklift hub bearing - Google Patents
Powder forging method for forklift hub bearing Download PDFInfo
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- CN105983698A CN105983698A CN201610033206.3A CN201610033206A CN105983698A CN 105983698 A CN105983698 A CN 105983698A CN 201610033206 A CN201610033206 A CN 201610033206A CN 105983698 A CN105983698 A CN 105983698A
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- 238000005242 forging Methods 0.000 title claims abstract description 47
- 239000000843 powder Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 17
- 239000012298 atmosphere Substances 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 239000010955 niobium Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract 1
- CXRFFSKFQFGBOT-UHFFFAOYSA-N bis(selanylidene)niobium Chemical compound [Se]=[Nb]=[Se] CXRFFSKFQFGBOT-UHFFFAOYSA-N 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- B22F1/0003—
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
- B22F2003/175—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging by hot forging, below sintering temperature
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
- Rolling Contact Bearings (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a powder forging method for a forklift hub bearing. The powder forging method comprises the steps of batching, mixing, pressing, sintering, forging, thermal treatment, surface stress peening treatment and the like. The hub bearing manufactured by compounding 30CrMnSi alloy steel powder, W6Mo5Cr4V2 alloy steel powder, powdered graphite and niobium diselenide powder through the powder forging technology has extremely good mechanical strength and excellent abrasion resistance, thermal resistance, impact resistance and fatigue resistance, and is long in service life and wide in market prospect.
Description
Technical field
The present invention relates to the powder forging process of a kind of forklift hub bearing, belong to power forging technical field.
Background technology
Hub bearing is one of key components and parts of fork truck, and its Main Function is load capacity and the rotation for wheel hub provides and accurately guides, and this requires that it can not only bear axial load and still suffer from radial load.It requires that it not only has preferable mechanical property, also to have good wearability, heat resistance and vibration impact resistance.
It is big that traditional common Forging Technology and machining process also exist forging fire consumption, combustion gas power consumption is big, forging time is long, forging efficiency is low, staff labor intensity is big, the forging shortcomings such as low precision, be difficult to meet current forklift hub bearing high-quality, high-performance, high efficiency, in high precision, low consumption, the requirement of low cost.
Power forging technology is conventional powder metallurgical technique and precision forging organically combines and grows up one have much the market competitiveness less, without cutting metal processing method, with metal dust as raw material, through preform compacting,
Carrying out heat-agglomerating in protective atmosphere and as rough forging, then once forging and molding and realize non-trimming precision die forging on forcing press, obtains and common forging part equal densities, complex-shaped net-size forging.The advantage of its existing powder metallurgy formation better performances, play again forging deformation and effectively change metal material tissue and the feature of performance effect, powder metallurgy and Forging Technology is made to achieve new breakthrough on producing, particularly suitable production in enormous quantities high-performance, complex-shaped constitutional detail, therefore have broad application prospects.
Content of the invention
It is an object of the invention to provide the powder forging process of a kind of forklift hub bearing.
For achieving the above object, the technical solution used in the present invention is as follows:
The powder forging process of a kind of forklift hub bearing, comprises the following steps:
A, dispensing and batch mixing
Weigh 30CrMnSi alloy steel powder, W6Mo5Cr4V2 alloy steel powder, powdered graphite and two selenizing niobium powders according to the ratio of mass ratio 10-14:6-9:2-4:1-2, after accurately weighing grain weight, be placed in batch mixer mixing 30-40min, to being evenly distributed；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into hub bearing preform, pressing pressure is 5-8t/cm2；
C, sintering
Above-mentioned prepared hub bearing preform is sintered in the sintering furnace be connected with protective atmosphere: first under argon atmosphere, be warming up to 740-860 DEG C; insulation 0.5-1h; it is warming up to 920-980 DEG C under nitrogen protection atmosphere again; insulation 1-2h; it is warming up to 1110-1170 DEG C under hydrogen shield atmosphere again; insulation 2-3h, is then cooled to 940-990 DEG C under vacuum conditions, is incubated 1-2h；
D, forging
Directly sending into die of press the hub bearing preform after sintering processes in sintering furnace and forging, coming out of the stove to forge time is 2-4s, and forging force is 3-6t/cm2, final forging temperature is 845-865 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 880-940 DEG C, is incubated 2-3h, is again heated to 1180-1240 DEG C, insulation 0.5-1h, it is heated to 350-390 DEG C after oil quenchinng, be incubated 4-6h, be again heated to 460-520 DEG C, insulation 2-4h, it is heated to 540-580 DEG C after water hardening, be incubated 2-3h, then be cooled to 260-320 DEG C, insulation 3-5h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 3-5cm, at forging surface treatment 20-40min under 0.4-0.6MPa pressure.
The chemical composition mass percent of described 30CrMnSi steel alloy is: C 0.28-0.32%, Si 1.0-1.2%, Mn 0.8-1.0%, Cr 0.9-1.1%, Ni 0.3-0.7%, P≤the 0.02%th, S≤0.02%, balance of Fe and be inevitably mingled with matter.
The chemical composition mass percent of described W6Mo5Cr4V2 steel alloy is: C 0.8-0.9%, Si 0.2-0.4%, Mn 0.15-0.35%, W 5.6-6.2%, Mo 4.8-5.4%, Cr 3.9-4.3%, V 1.8-2.2%, Cu 0.1-0.2%, P≤0.03%, S≤0.03%, balance of Fe and be inevitably mingled with matter.
Beneficial effects of the present invention:
The present invention utilizes power forging technology to be combined prepared hub bearing and not only have splendid mechanical strength 30CrMnSi alloy steel powder, W6Mo5Cr4V2 alloy steel powder, powdered graphite, two four kinds of powder of selenizing niobium powder, also there is excellent wearability, heat resistance, impact resistance and fatigue durability, service life is long, and market prospects are big.
Detailed description of the invention
The powder forging process of a kind of forklift hub bearing, comprises the following steps:
A, dispensing and batch mixing
Weigh 30CrMnSi alloy steel powder, W6Mo5Cr4V2 alloy steel powder, powdered graphite and two selenizing niobium powders according to the ratio of mass ratio 12:8:3:2, after accurately weighing grain weight, be placed in batch mixer mixing 35min, to being evenly distributed；
The chemical composition mass percent of above-mentioned 30CrMnSi steel alloy is: C 0.28-0.32%, Si 1.0-1.2%, Mn 0.8-1.0%, Cr 0.9-1.1%, Ni 0.3-0.7%, P≤the 0.02%th, S≤0.02%, balance of Fe and be inevitably mingled with matter；
The chemical composition mass percent of above-mentioned W6Mo5Cr4V2 steel alloy is: C 0.8-0.9%, Si 0.2-0.4%, Mn 0.15-0.35%, W 5.6-6.2%, Mo 4.8-5.4%, Cr 3.9-4.3%, V 1.8-2.2%, Cu 0.1-0.2%, P≤0.03%, S≤0.03%, balance of Fe and be inevitably mingled with matter；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into hub bearing preform, pressing pressure is 6t/cm2；
C, sintering
Above-mentioned prepared hub bearing preform is sintered in the sintering furnace be connected with protective atmosphere: first under argon atmosphere, be warming up to 830 DEG C; insulation 0.5h; it is warming up to 960 DEG C again under nitrogen protection atmosphere; insulation 1.5h; it is warming up to 1150 DEG C again under hydrogen shield atmosphere; insulation 2.5h, is then cooled to 960 DEG C under vacuum conditions, is incubated 1h；
D, forging
Directly sending into die of press the hub bearing preform after sintering processes in sintering furnace and forging, coming out of the stove to forge time is 3s, and forging force is 5t/cm2, final forging temperature is 855 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 910 DEG C, is incubated 2h, is again heated to 1220 DEG C, be incubated 0.5h, after oil quenchinng, be heated to 370 DEG C, insulation 5h, is again heated to 490 DEG C, is incubated 3h, is heated to 560 DEG C after water hardening, insulation 2.5h, then it is cooled to 280 DEG C, it is incubated 4h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 4cm, at forging surface treatment 30min under 0.5MPa pressure.
After testing, the Main Mechanical of above-mentioned prepared hub bearing material is: hardness 55.2HRC, tensile strength 1392MPa, yield strength 1126MPa, impact flexibility 97.1 J/cm2, percentage elongation 13.3%.
Claims (3)
1. the powder forging process of a forklift hub bearing, it is characterised in that comprise the following steps:
A, dispensing and batch mixing
Weigh 30CrMnSi alloy steel powder, W6Mo5Cr4V2 alloy steel powder, powdered graphite and two selenizing niobium powders according to the ratio of mass ratio 10-14:6-9:2-4:1-2, after accurately weighing grain weight, be placed in batch mixer mixing 30-40min, to being evenly distributed；
B, compacting
Adding the above-mentioned powder mixing on press and being pressed into hub bearing preform, pressing pressure is 5-8t/cm2；
C, sintering
Above-mentioned prepared hub bearing preform is sintered in the sintering furnace be connected with protective atmosphere: first under argon atmosphere, be warming up to 740-860 DEG C; insulation 0.5-1h; it is warming up to 920-980 DEG C under nitrogen protection atmosphere again; insulation 1-2h; it is warming up to 1110-1170 DEG C under hydrogen shield atmosphere again; insulation 2-3h, is then cooled to 940-990 DEG C under vacuum conditions, is incubated 1-2h；
D, forging
Directly sending into die of press the hub bearing preform after sintering processes in sintering furnace and forging, coming out of the stove to forge time is 2-4s, and forging force is 3-6t/cm2, final forging temperature is 845-865 DEG C；
E, heat treatment
Above-mentioned prepared forging is heated to 880-940 DEG C, is incubated 2-3h, is again heated to 1180-1240 DEG C, insulation 0.5-1h, it is heated to 350-390 DEG C after oil quenchinng, be incubated 4-6h, be again heated to 460-520 DEG C, insulation 2-4h, it is heated to 540-580 DEG C after water hardening, be incubated 2-3h, then be cooled to 260-320 DEG C, insulation 3-5h, air cooling of coming out of the stove；
F, surface shot blasting strengthening process
Using 0.05mm stainless steel bullet, jet length is 3-5cm, at forging surface treatment 20-40min under 0.4-0.6MPa pressure.
2. the powder forging process of forklift hub bearing according to claim 1, it is characterized in that, the chemical composition mass percent of described 30CrMnSi steel alloy is: C 0.28-0.32%, Si 1.0-1.2%, Mn 0.8-1.0%, Cr 0.9-1.1%, Ni 0.3-0.7%, P≤the 0.02%th, S≤0.02%, balance of Fe and be inevitably mingled with matter.
3. the powder forging process of forklift hub bearing according to claim 1, it is characterized in that, the chemical composition mass percent of described W6Mo5Cr4V2 steel alloy is: C 0.8-0.9%, Si 0.2-0.4%, Mn 0.15-0.35%, W 5.6-6.2%, Mo 4.8-5.4%, Cr 3.9-4.3%, V 1.8-2.2%, Cu 0.1-0.2%, P≤0.03%, S≤0.03%, balance of Fe and be inevitably mingled with matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033206.3A CN105983698A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift hub bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610033206.3A CN105983698A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift hub bearing |
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| Publication Number | Publication Date |
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| CN105983698A true CN105983698A (en) | 2016-10-05 |
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Family Applications (1)
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| CN201610033206.3A Pending CN105983698A (en) | 2016-01-19 | 2016-01-19 | Powder forging method for forklift hub bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107538187A (en) * | 2017-10-12 | 2018-01-05 | 浙江丰波机电科技有限公司 | Third generation circular cone ring flange rib and roller path machining method |
| CN113817944A (en) * | 2021-09-13 | 2021-12-21 | 安泰天龙(北京)钨钼科技有限公司 | High-performance tungsten alloy bar and preparation method thereof |
| CN113814400A (en) * | 2021-08-18 | 2021-12-21 | 泉州市宇豪粉末冶金有限公司 | Production process of seedling needle of rice transplanter |
| CN113996806A (en) * | 2021-10-27 | 2022-02-01 | 中国航发北京航空材料研究院 | Laser selective melting forming method for 30CrMnSi shell part |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506401A (en) * | 2006-07-06 | 2009-08-12 | 株式会社神户制钢所 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
| CN103084576A (en) * | 2013-01-22 | 2013-05-08 | 山东信义粉末冶金有限公司 | Production method of powder metallurgy hot forging connecting rod with sealed surface |
| CN103894613A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Powder forging process of connecting rods |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
| CN105057977A (en) * | 2015-07-20 | 2015-11-18 | 安徽蓝博旺机械集团合诚机械有限公司 | Method for manufacturing steering axle connecting rod for forklift |
| CN105234341A (en) * | 2015-10-22 | 2016-01-13 | 安徽蓝博旺机械集团合诚机械有限公司 | Powder forging method of forklift knuckle |
-
2016
- 2016-01-19 CN CN201610033206.3A patent/CN105983698A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506401A (en) * | 2006-07-06 | 2009-08-12 | 株式会社神户制钢所 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
| CN103894613A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Powder forging process of connecting rods |
| CN103084576A (en) * | 2013-01-22 | 2013-05-08 | 山东信义粉末冶金有限公司 | Production method of powder metallurgy hot forging connecting rod with sealed surface |
| CN104128607A (en) * | 2014-07-21 | 2014-11-05 | 玉溪大红山矿业有限公司 | Manufacturing technology of vehicle connecting rod |
| CN105057977A (en) * | 2015-07-20 | 2015-11-18 | 安徽蓝博旺机械集团合诚机械有限公司 | Method for manufacturing steering axle connecting rod for forklift |
| CN105234341A (en) * | 2015-10-22 | 2016-01-13 | 安徽蓝博旺机械集团合诚机械有限公司 | Powder forging method of forklift knuckle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107538187A (en) * | 2017-10-12 | 2018-01-05 | 浙江丰波机电科技有限公司 | Third generation circular cone ring flange rib and roller path machining method |
| CN113814400A (en) * | 2021-08-18 | 2021-12-21 | 泉州市宇豪粉末冶金有限公司 | Production process of seedling needle of rice transplanter |
| CN113817944A (en) * | 2021-09-13 | 2021-12-21 | 安泰天龙(北京)钨钼科技有限公司 | High-performance tungsten alloy bar and preparation method thereof |
| CN113996806A (en) * | 2021-10-27 | 2022-02-01 | 中国航发北京航空材料研究院 | Laser selective melting forming method for 30CrMnSi shell part |
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Application publication date: 20161005 |