CN107058841B - A kind of high mechanical strength tungsten alloy material and preparation method thereof - Google Patents
A kind of high mechanical strength tungsten alloy material and preparation method thereof Download PDFInfo
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- CN107058841B CN107058841B CN201710518375.0A CN201710518375A CN107058841B CN 107058841 B CN107058841 B CN 107058841B CN 201710518375 A CN201710518375 A CN 201710518375A CN 107058841 B CN107058841 B CN 107058841B
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- tungsten alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
Abstract
The present invention relates to a kind of high mechanical strength tungsten alloy materials and preparation method thereof, by following material composition by mass percentage: W:90%；Ni:3-5%；Fe:1-3%；Mo:1-3%；Co:0.1-1%；Si3N4: 0.1-2%, preparation method are as follows: raw material powder is weighed according to the ratio and is added in vacuum ball grinder, abrasive media is added, is vacuumized with vacuum pump；Vacuum ball grinder is put into ball milling 15-30h in high energy ball mill；Vacuum ball grinder is taken out, quickly volatilize abrasive media ethyl alcohol, is pressed into molding green body by mold；Molding green body is put into vacuum tube furnace and is sintered, sintering temperature is 1220-1280 DEG C, soaking time 30-90min.Tungsten alloy material prepared by the present invention is without mechanical enhancer processing hardness up to 60HRC, and tensile strength is up to 1280Mpa.
Description
Technical field:
The present invention relates to vehicle powder metallurgy field of material preparation, more particularly to a kind of high mechanical strength tungsten is closed
Golden material and preparation method thereof, the tungsten for being related to the doping of W-Ni-Fe system alloy and other metal powders and compound and preparing close
Golden material.
Background technique:
Tungsten-bast alloy is one kind using tungsten as hard phase, is the composite material for cohering phase composition with ambrose alloy or ferronickel.Tungsten base closes
Fitting has that density height, good toughness, thermal expansion coefficient are small and corrosion resistance is widely used in by force information and power, metallurgy, aviation
Space flight, defence and military and core industry.With the development of science and technology and the demand of people, have to the performance of tungsten alloy higher
It is required that existing routine tungsten alloy is mainly synthesized by tungsten ferronickel powder, cobalt powder and molybdenum powder are usually adulterated, and general tungsten alloy is (logical at present
Often be tungsten nickel iron alloy) hardness be 45-50HRC, tensile strength 800-1150Mpa, current generally tungsten alloy cannot
Meet the needs of people, it is therefore necessary to guarantee its comprehensive performance (high specific gravity, thermal expansion coefficient is small and corrosion resistance) not by
The premise of influence improves the hardness and tensile strength of tungsten alloy.
Summary of the invention:
The present invention be directed in place of the deficiencies in the prior art, the first purpose is to provide a kind of high mechanical strength tungsten alloy material
Material, the second purpose are to provide a kind of preparation method of high mechanical strength tungsten alloy material, the present invention by the doping of silicon nitride,
Guarantee that improving tungsten under the premise of the comprehensive performance (high specific gravity, thermal expansion coefficient is small and corrosion resistance) of tungsten-bast alloy is unaffected closes
The hardness and tensile strength of gold.
Technology solution of the invention is as follows:
A kind of high mechanical strength tungsten alloy material, tungsten alloy material is by following material composition by mass percentage: W:
90%；Ni:3-5%；Fe:1-3%；: Mo:1-3%；Co:0.1-1%；Si3N4: 0.1-2%.
Preferably, the W, Ni, Fe, Mo Co and Si3N4Respectively dusty material, the partial size of the tungsten powder are 1-
10um；Nickel powder is carbonyl nickel powder, and partial size is less than 10um；Iron powder is carbonyl iron dust, partial size 1-10um.
A kind of preparation method of high mechanical strength tungsten alloy material, includes the following steps:
It is added in vacuum ball grinder step 1: raw material powder is weighed according to the ratio, abrasive media is added, with vacuum pumping
Vacuum；
Step 2: vacuum ball grinder is put into ball milling 15-30h in high energy ball mill, abrading-ball used is tungsten alloy ball, ball material
Than for 10:1；
Step 3: taking out vacuum ball grinder, quickly volatilize abrasive media ethyl alcohol, is pressed into molding green body by mold；
It is sintered step 4: molding green body is put into vacuum tube furnace, sintering temperature is 1220-1280 DEG C, when heat preservation
Between be 30-90min.
Preferably, the abrasive media is ethyl alcohol.
Preferably, the rotational speed of ball-mill of the ball mill is 250r/min in second step.
Preferably, being passed through argon gas in the sintering process as protective gas in the 4th step.
The beneficial effects of the present invention are:
The problems such as present invention seek to address that tungsten alloy intensity is low, tensile strength is low, and deflection is big and cost.Existing routine
Tungsten alloy is mainly synthesized by tungsten ferronickel powder, usually adulterates cobalt powder and molybdenum powder, basis is mentioned the present invention by doped silicon nitride herein
The mechanical performance of high-tungsten alloy material.
The formula of the invention is reasonable, and suitable cobalt and molybdenum and silicon nitride is added.Since the atomic radius of molybdenum is close with tungsten,
In sintering process, molybdenum can replace part tungsten, so that tungsten grain be prevented to grow up.Silicon nitride is a kind of superhard substance, and itself
With lubricity, there is good booster action to the control of deformation during the sintering process, and promote the intensity of tungsten alloy.Cobalt
Addition can improve Ni-based solid solution to the wellability and interface binding power of tungsten particle, make up molybdenum doping to tungsten alloy elongation percentage
The deficiency of decline.The tungsten alloy intensity with higher and hardness prepared by present component formula.
Specific embodiment:
Embodiment 1,
A kind of high mechanical strength tungsten alloy material and preparation method thereof, by following material composition by mass percentage:
W:90%；Ni:4.2%；Fe:1.8%；: Mo:2%；Co:1%；Si3N4: 1%.Above-mentioned raw materials powder is weighed into addition according to the ratio
Into vacuum ball grinder, 25ml ethyl alcohol is added as abrasive media, is vacuumized with vacuum pump；Vacuum ball grinder is put into high energy ball
For 24 hours, abrading-ball used is tungsten alloy ball to ball milling, and ratio of grinding media to material 10:1, a variety of original powders are sufficiently mixed uniformly by ball milling, and are incited somebody to action in grinding machine
Powder is ground thinner, and powder is more activity more preferably to be more conducive to be sintered；Vacuum ball grinder is taken out, ethyl alcohol flash baking is used
Green body is made by DY-30 type tablet press machine in fixed grinding tool；Molding green body is put into vacuum tube furnace and is sintered, argon gas is passed through
As protective gas, sintering temperature is 1250 DEG C, soaking time 1h.
The tungsten alloy material prepared by the formula and method of embodiment 1, carries out postorder processing, tungsten to sample as required
Hardness is 55HRC, tensile strength 1250Mpa under alloy at normal temperature.
Embodiment 2:
A kind of high mechanical strength tungsten alloy material and preparation method thereof, by following material composition by mass percentage:
W:90%；Ni:3.5%；Fe:1.5%；: Mo:2%；Co:1%；Si3N4: 2%.Above-mentioned raw materials powder is weighed into addition according to the ratio
Into vacuum ball grinder, 25ml ethyl alcohol is added as abrasive media, is vacuumized with vacuum pump；Vacuum ball grinder is put into high energy ball
For 24 hours, abrading-ball used is tungsten alloy ball, ratio of grinding media to material 10:1 to ball milling in grinding machine；Vacuum ball grinder is taken out, by ethyl alcohol flash baking,
Green body is made by DY-30 type tablet press machine with fixed grinding tool；Molding green body is put into vacuum tube furnace and is sintered, argon is passed through
Gas is as protective gas, and sintering temperature is 1250 DEG C, soaking time 1h.
The tungsten alloy material prepared by the formula and method of embodiment 2, carries out postorder processing, tungsten to sample as required
Hardness is 60HRC, tensile strength 1280Mpa under alloy at normal temperature.
Above-described embodiment is the specific descriptions carried out to the present invention, and only invention is further explained, Bu Nengli
Solution is limiting the scope of the present invention, and those skilled in the art makes some nonessential according to the content of foregoing invention
Modifications and adaptations are fallen within the scope of protection of the present invention.
Claims (4)
1. a kind of high mechanical strength tungsten alloy material, it is characterised in that: tungsten alloy material is by following object by mass percentage
Matter composition: W:90%；Ni:3-5%；Fe:1-3%；: Mo:1-3%；Co:0.1-1%；Si3N4: 0.1-2%；
The W, Ni, Fe, Mo Co and Si3N4Respectively dusty material, the partial size of the tungsten powder are 1-10um；Nickel powder is carbonyl
Nickel powder, partial size are less than 10um；Iron powder is carbonyl iron dust, partial size 1-10um.
2. a kind of preparation method of high mechanical strength tungsten alloy material as described in claim 1, it is characterised in that: including as follows
Step:
It is added in vacuum ball grinder step 1: raw material powder is weighed according to the ratio, abrasive media is added, it is true with vacuum pumping
It is empty；
Step 2: vacuum ball grinder is put into ball milling 15-30h in high energy ball mill, abrading-ball used is tungsten alloy ball, and ratio of grinding media to material is
10:1；
Step 3: taking out vacuum ball grinder, quickly volatilize abrasive media ethyl alcohol, is pressed into molding green body by mold；
It is sintered step 4: molding green body is put into vacuum tube furnace, sintering temperature is 1220-1280 DEG C, and soaking time is
30-90min。
3. a kind of preparation method of high mechanical strength tungsten alloy material according to claim 2, it is characterised in that: second step
In, the rotational speed of ball-mill of the ball mill is 250r/min.
4. a kind of preparation method of high mechanical strength tungsten alloy material according to claim 2, it is characterised in that: the 4th step
In, argon gas is passed through in the sintering process as protective gas.
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| CN109161771B (en) * | 2018-11-22 | 2020-10-09 | 钱尉茂 | Tungsten alloy and preparation method thereof |
| CN113913664A (en) * | 2021-07-13 | 2022-01-11 | 中国科学院兰州化学物理研究所 | Silicon nitride reinforced tungsten and tungsten alloy material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033651A (en) * | 1987-10-23 | 1989-07-05 | 西蒙·鲍库茨 | The tungsten ferronickel heavy alloy and the production method thereof of very high mechanical properties |
| CN101423912A (en) * | 2008-12-03 | 2009-05-06 | 华南理工大学 | Nanocrystalline tungsten-based alloy block body material and preparation method thereof |
| CN103789592A (en) * | 2014-01-24 | 2014-05-14 | 株洲华美钨合金有限公司 | Tungsten alloy material and preparation method and application thereof in preparation of molten aluminum filter disc |
| CN104357725A (en) * | 2014-10-21 | 2015-02-18 | 常熟市金成模具有限公司 | High-temperature-resistant metal ceramic die material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040079191A1 (en) * | 2002-10-24 | 2004-04-29 | Toshiba Tungaloy Co., Ltd. | Hard alloy and W-based composite carbide powder used as starting material |
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- 2017-06-29 CN CN201710518375.0A patent/CN107058841B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033651A (en) * | 1987-10-23 | 1989-07-05 | 西蒙·鲍库茨 | The tungsten ferronickel heavy alloy and the production method thereof of very high mechanical properties |
| CN101423912A (en) * | 2008-12-03 | 2009-05-06 | 华南理工大学 | Nanocrystalline tungsten-based alloy block body material and preparation method thereof |
| CN103789592A (en) * | 2014-01-24 | 2014-05-14 | 株洲华美钨合金有限公司 | Tungsten alloy material and preparation method and application thereof in preparation of molten aluminum filter disc |
| CN104357725A (en) * | 2014-10-21 | 2015-02-18 | 常熟市金成模具有限公司 | High-temperature-resistant metal ceramic die material |
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Denomination of invention: High mechanical strength tungsten alloy material and preparation method thereof Effective date of registration: 20210913 Granted publication date: 20181221 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Yangxi sub branch Pledgor: ZHEJIANG CHANT NEW MATERIALS TECHNOLOGY Co.,Ltd. Registration number: Y2021330001343 |