CN1048066A - Novel tungsten alloy ball - Google Patents
Novel tungsten alloy ball Download PDFInfo
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- CN1048066A CN1048066A CN 89103777 CN89103777A CN1048066A CN 1048066 A CN1048066 A CN 1048066A CN 89103777 CN89103777 CN 89103777 CN 89103777 A CN89103777 A CN 89103777A CN 1048066 A CN1048066 A CN 1048066A
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- tungsten alloy
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Abstract
The present invention is a kind of novel tungsten alloy ball.Mainly be applicable to the high-speed impact body of shrapnel.Its principal character is than great, the intensity height, and good toughness is a kind of good high-speed impact body, has further improved the lethal power of shrapnel.Owing to also added rare earth element in the alloy ball, stoped tungsten grain to be grown up, make it nodularization, crystal grain thinning; Hinder the diffusion process of Sauerstoffatom in alloy simultaneously, thereby improved the anti-oxidant and corrosion resistance of alloy.
Description
The present invention is a tungsten alloy ball.Mainly be applicable to the high-speed impact body of shrapnel, also can be used for high precision instrument and aerospace equilibrium system.
At present, the rolling accessory of the impact body of shrapnel and aerospace instrumentation mostly adopts steel ball, shot or sintered carbide ball, and its main drawback is a light specific gravity, and is little for the weapon lethal power, for the high precision aerospace instrumentation, then is that precision is low.Desire further to improve the lethal power of shrapnel and the precision of aerospace instrumentation, just must improve proportion, size precision and performance, the size stability of shrapnel impact body and instrument rolling accessory.In this technical field, countries in the world all create conditions Study on Acceleration and promote the development of this technology trying to be the first.For this reason, the present invention's novel tungsten alloy ball of having studied success.
As tungstenalloy, present international research is many.U.S. Pat 3254995 is exactly a comparatively advanced example.It is alloy that this patent provides a kind of W-Ni-Fe-Co, its objective is to improve the problem that thick article center partial properties of high-tungsten alloy descends, but its intensity and toughness is still on the low side slightly.
The object of the present invention is to provide a kind of novel tungsten alloy ball, this tungsten alloy ball is proportion and intensity height not only, and good toughness, antioxidant property and corrosion resistance excellence, and dimensional stability is good.
To achieve these goals, the present invention is on the tungstenalloy basis at W-Ni-Fe, has added Co, Cr, Mo, B and RE.Its concrete chemical ingredients (weight %) is: W75～99.91%, and Ni0.5～20%, Fe0.5～20%, any above sum is 0.009～6% among Co, Cr, Mo, the B, RE0.001～1.0%.
Add a certain amount of Co element and can improve the processing performance of tungsten ball, make product size stable, do not deform; Simultaneously, improve the homogeneity of alloy structure, prevent that W-Ni intermetallic compound (fragility phase) from generating, and improves the mechanical property of alloy.The proper amount of rare-earth element (RE) that is added be distributed in to disperse equably bonding mutually in or on bonding and the interface of tungsten grain, the prevention tungsten grain is grown up, and makes it nodularization, and refinement crystal grain; Simultaneously, rare earth element also hinders the diffusion process of Sauerstoffatom in alloy, has played the antioxygenation of alloy, and has strengthened the corrosion resistance to acid.Make the anti-oxidant and corrosion resistance of the present invention obviously be better than prior art.RE exists with the sosoloid form in alloy, so content should be controlled within the specific limits.
The present invention adopts powder metallurgical technique to make.Technology is simple, easily produces in batches, and cost is low, and the yield rate height can reach more than 99%.Remarkable economic efficiency is arranged.
Tungsten alloy ball tensile strength of the present invention is greater than 95 kilograms/millimeter
2, unit elongation can reach 20%, and density is 17.0～18.0 gram per centimeters
3, and dimensional stability is good, and weight error is little.Tungsten alloy ball with 6.0 millimeters of φ is an example, and its diameter error is ± 0.05～0.10mm, and weight error is ± 0.15～0.20 gram.
Adding RE improves anti-oxidant and corrosion resistance is characteristics of the present invention.For this reason, the present invention has made the anti-oxidant and erosion-resisting performance test of RE especially.Smelted four stove tungsten alloy balls altogether, wherein heat (batch) number 1 is not add RE, and heat (batch) number 2,3,4 has added the RE of different content respectively.For the ease of comparison, the chemical ingredients of heat (batch) number 2,3,4, except RE, other is all identical with heat (batch) number 1.Table 1 and table 2 have been enumerated the chemical ingredients and anti-oxidant, the corrosion resistance of tested alloys ball respectively.
The chemical ingredients of table 1 tungsten alloy ball (weight %)
| Heat (batch) number | W | Ni | Fe | Co | Mo | RE * |
| 1 2 3 4 | 90 90 90 90 | 4.0 4.0 4.0 4.0 | 1.5 1.5 1.5 1.5 | 0.5 0.5 0.5 0.5 | 4.0 4.0 4.0 4.0 | 0 0.05 0.10 0.20 |
*Annotating RE content is the percentage ratio of alloy total content
Anti-oxidant, the corrosion resistance of table 2 tungsten alloy ball
| Heat (batch) number | Tensile strength kilogram/millimeter 2 | At 30%H 2SO 4In corrosion rate Restrain/be 2 Hour | 800 ℃ of 4 hourly average oxidation weight gain speed gram/rice 2Hour |
| 1 2 3 4 | 97.7 97.8 97.9 97.8 | 0.107 0.067 0.022 does not measure variation | 32.10 25.30 23.00 22.25 |
As seen from Table 2, add RE after, anti-oxidant, corrosion resistance all be improved significantly.
Embodiment
Chemical ingredients designed according to this invention adopts powder metallurgy process to prepare three stove tungsten alloy balls, and its concrete chemical ingredients is as shown in table 3, prepared tungsten alloy ball has been carried out the test of mechanical property, antioxidant property and corrosion resistance respectively.The gained result is as shown in table 4.
The chemical ingredients (weight %) of table 3 embodiment tungsten alloy ball
| Heat (batch) number | W | Ni | Fe | Co | Cr | Mo | B | RE |
| A B C | 90.00 92.50 94.96 | 5.20 4.50 2.50 | 3.77 2.00 2.50 | 1.00 0.50 0.02 | 0.03 | 0.50 | 0.02 | 0.05 0.10 0.20 |
The performance of table 4 embodiment tungsten alloy ball
| Heat (batch) number | The proportion gram per centimeter 3 | Tensile strength σ b kilogram/millimeter 2 | Unit elongation δ 5％ | 800 ℃ of 4 hourly average speed of weight increment gram/rice 2Hour |
| A B C | 17.15 17.69 18.08 | 96.5 96.9 95.8 | 26.0 23.0 20.6 | 25.00 23.00 22.25 |
Claims (1)
- A kind of novel tungsten alloy ball is characterized in that the Chemical Composition (weight %) of alloy is: 75～99.91%W, and 0.5～20%Ni, 0.5～20%Fe, any above sum is 0.009～6% among Co, Cr, B, the Mo,0.001～1.0%RE。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89103777 CN1048066A (en) | 1989-06-16 | 1989-06-16 | Novel tungsten alloy ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89103777 CN1048066A (en) | 1989-06-16 | 1989-06-16 | Novel tungsten alloy ball |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1048066A true CN1048066A (en) | 1990-12-26 |
Family
ID=4855275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89103777 Pending CN1048066A (en) | 1989-06-16 | 1989-06-16 | Novel tungsten alloy ball |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1048066A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005018A (en) * | 2014-05-29 | 2014-08-27 | 耿荣献 | Wear-resistant coating process applicable to surfaces of highly wear-resistant and fire-proof material dies |
| CN104357694A (en) * | 2014-07-11 | 2015-02-18 | 黑龙江北方工具有限公司 | Manufacturing method of high-hardness tungsten alloy material |
| CN105603284A (en) * | 2016-01-14 | 2016-05-25 | 洛阳三睿宝纳米科技有限公司 | Metal ceramic material containing nanoscale boehmite and preparation method of metal ceramic material |
| CN105821273A (en) * | 2016-05-31 | 2016-08-03 | 南昌航空大学 | High temperature resisting tungsten-molybdenum alloy and preparation method thereof |
-
1989
- 1989-06-16 CN CN 89103777 patent/CN1048066A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005018A (en) * | 2014-05-29 | 2014-08-27 | 耿荣献 | Wear-resistant coating process applicable to surfaces of highly wear-resistant and fire-proof material dies |
| CN104357694A (en) * | 2014-07-11 | 2015-02-18 | 黑龙江北方工具有限公司 | Manufacturing method of high-hardness tungsten alloy material |
| CN105603284A (en) * | 2016-01-14 | 2016-05-25 | 洛阳三睿宝纳米科技有限公司 | Metal ceramic material containing nanoscale boehmite and preparation method of metal ceramic material |
| CN105821273A (en) * | 2016-05-31 | 2016-08-03 | 南昌航空大学 | High temperature resisting tungsten-molybdenum alloy and preparation method thereof |
| CN105821273B (en) * | 2016-05-31 | 2017-09-01 | 南昌航空大学 | A kind of high temperature resistant tungsten-molybdenum alloy and preparation method thereof |
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