CN115976387A - High-strength tungsten alloy wire and preparation method thereof - Google Patents
High-strength tungsten alloy wire and preparation method thereof Download PDFInfo
- Publication number
- CN115976387A CN115976387A CN202310096216.1A CN202310096216A CN115976387A CN 115976387 A CN115976387 A CN 115976387A CN 202310096216 A CN202310096216 A CN 202310096216A CN 115976387 A CN115976387 A CN 115976387A
- Authority
- CN
- China
- Prior art keywords
- alloy wire
- temperature
- tungsten alloy
- strength
- tungsten
- 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.)
- Granted
Links
- 229910001080 W alloy Inorganic materials 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 6
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000010937 tungsten Substances 0.000 claims abstract description 6
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 5
- 239000010941 cobalt Substances 0.000 claims abstract description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 25
- 238000000137 annealing Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000001513 hot isostatic pressing Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 1
- 229910003460 diamond Inorganic materials 0.000 description 7
- 239000010432 diamond Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a tungsten alloy wire with high strength and a preparation method thereof, wherein 0.5-1.5wt% of the tungsten alloy wire is lanthanum, 0.1-1.0wt% of the tungsten alloy wire is cobalt or iron, and the balance is tungsten, the strength of the tungsten alloy wire is higher than 7000Mpa at room temperature and higher than 5000Mpa at 350 ℃, the wire breakage rate in the drawing process is lower than 2%, and the tungsten alloy wire has the advantages of high strength, high production yield and the like.
Description
Technical Field
The invention relates to a tungsten alloy wire and a preparation method thereof, in particular to a tungsten alloy wire with high strength and a preparation method thereof.
Background
Tungsten and its alloy have the advantages of high elastic modulus, high conductivity, high strength and good toughness and plasticity. Compared with a carbon steel wire saw, the diamond wire saw made of the tungsten alloy wire has the advantages of high thinning degree, small cutting loss, high yield and the like. The production technology of the raw material wire rod of the carbon steel diamond wire which is common in the market at present is monopolized in Japan, and the carbon steel diamond wire cannot be made in China at present, but the preparation technology of the tungsten alloy wire has a mature technology in China and can realize large-scale mass production, so that the development of the tungsten alloy wire diamond wire can not only improve the capacity and the quality, but also solve the problem of material supply.
Although the pure tungsten wire can be drawn to be less than 10 mu m, the strength is low, the pure tungsten wire cannot be used for producing diamond wires, other elements are required to be added to improve the performance, common added elements such as rhenium, molybdenum, cobalt, chromium, iron and the like can improve the strength to be more than 6000MPa, and if the strength is improved by changing a drawing die chain, wire breakage is easily caused in the drawing process, and certain problems exist.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a tungsten alloy wire with low wire breakage rate in drawing and high strength; the invention also aims to provide a preparation method of the tungsten alloy wire.
The technical scheme is as follows: the high-strength tungsten alloy wire comprises 0.5-1.5wt% of lanthanum, 0.1-1.0wt% of cobalt or iron and the balance of tungsten, wherein the strength of the tungsten alloy wire is higher than 7000Mpa at the temperature of 0-40 ℃, the strength of the tungsten alloy wire is higher than 6000Mpa at the temperature of 40-200 ℃, the strength of the tungsten alloy wire is higher than 5500Mpa at the temperature of 200-300 ℃, and the strength of the tungsten alloy wire is higher than 5000Mpa at the temperature of 300-350 ℃.
Furthermore, the diameter of the tungsten alloy wire is 15-45 μm.
The preparation process of the tungsten alloy wire comprises the following steps:
(1) Preparing an alloy rod: mixing single metal powder according to the mass ratio of each element in the components of the alloy wire, then putting the mixture into a mould, and performing hot isostatic pressing twice to obtain an alloy rod;
(2) Carrying out rotary swaging to process an alloy rod;
(3) Drawing at 600-2500 deg.C;
(4) Low-temperature drawing is carried out at 200-350 ℃.
Further, the purity of the elementary metal powder in the step (1) is higher than 99.9%, and the particle size is 3-4 μm.
Further, the swaging temperature in the step (2) is 1400-1450 ℃.
Further, in the high-temperature drawing process in the step (3), the strength of the tungsten alloy wire is 50-70Mpa at 2300-2500 ℃, and is 200-1000Mpa at 10-40 ℃.
Further, the low-temperature drawing annealing in the step (4) adopts a step-type temperature rise, and the temperature rise rate is as follows: room temperature-500 deg.C: 100 ℃/min;500-750 ℃:80 ℃/min;750-800 ℃:50 ℃/min, and the total time is 30-45 minutes.
Further, the low-temperature drawing in the step (4) is carried out for 2 times of 45-60 times of drawing, and annealing treatment is carried out between two times of drawing at the temperature of 750-800 ℃.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) The high-temperature strength is high, and the strength is higher than 5000Mpa at 300-350 ℃;
(2) The drawing broken wire rate is lower than 2 percent;
(3) The strength at room temperature exceeds 7000MPa, and higher cutting tension can be used after the diamond wire is manufactured;
(4) Can be processed to the diameter of 15 mu m, and reduces the cutting loss.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
The alloy of the embodiment comprises W-1La-1Co (lanthanum: 1.0wt%, cobalt: 1.0wt%, and tungsten in balance), the breaking force is 5.1N after being processed into a 15 μm alloy wire, the strength at room temperature is 7215Mpa actually measured, and the wire breakage rate in drawing is 1.2%.
The preparation method of the tungsten alloy wire comprises the following steps:
(1) Preparing an alloy rod: according to the mass ratio of each element in the components of the alloy wire, mixing pure metal powder with the purity higher than 99.9% and the grain diameter of 3-4 mu m, then putting the mixture into a steel mould with the diameter of 100mm, and carrying out hot isostatic pressing twice at 1200 ℃ and 1800 ℃ to obtain an alloy rod with the diameter of 35 mm;
(2) Rotary swaging: the rotary swaging temperature is 1400-1450 ℃, the total pass is 20, and the diameter of the alloy rod is processed from 35mm to 9mm by rotary swaging;
(3) High-temperature drawing: the drawing is carried out for 6 times and 40 times, the drawing is carried out for the first time from 9mm to 8mm at the temperature of 2450 ℃ for 1 time, the strength is higher than 50MPa at the temperature, and the strength is higher than 200MPa at room temperature after the drawing. Drawing from 8mm to 6mm for the second time at 700 ℃ for 10 times. Drawing from 6mm to 5mm for the third time at 2400 deg.C for 1 pass, wherein the strength is higher than 60MPa, and the strength is higher than 500MPa at room temperature after drawing. Drawing from 5mm to 3mm for the fourth time at 650 ℃ for 12 times. Drawing for the fifth time from 3mm to 2mm at 2350 deg.C for 1 time, wherein the strength is higher than 70MPa, and the strength at room temperature after drawing is higher than 1000MPa. Drawing the steel wire from 2mm to 0.60mm for the sixth time at 600 ℃ for 15 times;
(4) Low-temperature drawing: carrying out 45-60-pass drawing for 2 times, firstly drawing from 0.60mm to 0.15mm for 30 passes at 350 ℃, then carrying out primary annealing treatment at 800 ℃, adopting step-type temperature rise, wherein the temperature rise rate is as follows: room temperature-500 deg.C: 100 ℃/min;500-750 deg.C: 80 ℃/min;750-800 ℃:50 ℃/min, the total time is 30 minutes. After annealing, the steel is drawn from 0.15mm to less than 0.045mm for 15 to 30 times, and the temperature is 200 to 300 ℃.
Example 2
The alloy of the embodiment comprises W-0.7La-1Fe (lanthanum: 0.7wt%, iron: 1.0wt%, and the balance tungsten), the breaking force is 5.0N after being processed into alloy wires with the diameter of 15 mu m, the actual measured strength is 7073Mpa, and the drawing wire breakage rate is 1.8%.
(1) Preparing an alloy rod: according to the mass ratio of each element in the components of the alloy wire, mixing powder with purity higher than 99.9% and grain size of 3-4 μm, then placing the mixture into a steel mould with the diameter of 100mm, and carrying out hot isostatic pressing twice at 1200 ℃ and 1800 ℃ to obtain an alloy rod with the diameter of 35 mm;
(2) Rotary swaging: the rotary swaging temperature is 1400-1450 ℃, the total pass is 20, and the diameter of the alloy rod is processed from 35mm to 9mm by rotary swaging;
(3) High-temperature drawing: the drawing is carried out for 6 times and 40 times, the drawing is carried out for the first time from 9mm to 8mm at the temperature of 2450 ℃ for 1 time, the strength is higher than 50MPa at the temperature, and the strength is higher than 200MPa at room temperature after the drawing. Drawing from 8mm to 6mm for the second time at 700 ℃ for 10 times. Drawing from 6mm to 5mm for the third time at 2400 deg.C for 1 pass, wherein the strength is higher than 60MPa, and the strength is higher than 500MPa at room temperature after drawing. Drawing from 5mm to 3mm for the fourth time at 650 ℃ for 12 times. Drawing for the fifth time from 3mm to 2mm at 2350 deg.C for 1 time, wherein the strength is higher than 70MPa, and the strength at room temperature after drawing is higher than 1000MPa. Drawing from 2mm to 0.60mm for the sixth time at 600 ℃ for 15 times;
(4) Low-temperature drawing: carrying out 45-60-pass drawing for 2 times, firstly drawing from 0.60mm to 0.15mm for 30 passes at 350 ℃, then carrying out primary annealing treatment at 800 ℃, adopting step-type temperature rise, wherein the temperature rise rate is as follows: room temperature-500 deg.C: 100 ℃/min;500-750 ℃:80 ℃/min;750-800 ℃:50 ℃/min, and the total time length is 30 minutes. After annealing, the steel is drawn from 0.15mm to less than 0.045mm for 15 to 30 times, and the temperature is 200 to 300 ℃.
Comparative example 1
The alloy composition of this application example was W-1Re-1Co (Re: 0.7wt%, co: 1.0wt%, balance W), the breaking force after processing into 15 μm alloy wire was 4.5N, the measured strength was 6366MPa, and the wire breakage rate by drawing was 4.1%.
Comparative example 2
The alloy composition of the application example is high-carbon steel wire containing 0.92wt% of carbon, the breaking force is 6.2N after the steel wire is processed to be 40 mu m, the actual measured strength is 4933Mpa, and the drawing wire breakage rate is 5.2%.
After preparing diamond wires from examples 1 to 4, M10-sized silicon wafers were cut, respectively, with the cutting tension set at 3.0N and the number of cuts set at not less than 100, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the ultra-high strength tungsten alloy wire containing lanthanum has low breakage rate and high strength in the drawing production process, has low loss and high yield of products after being manufactured into a wire saw, and meets the requirements of high quality, high efficiency and low loss.
Claims (9)
1. A tungsten alloy wire with high strength is characterized in that: the components of the alloy comprise 0.5-1.5wt% of lanthanum, 0.1-1.0wt% of cobalt or iron and the balance of tungsten; the strength of the tungsten alloy wire is higher than 7000Mpa at the temperature of 0-40 ℃, higher than 6000Mpa at the temperature of 40-200 ℃, higher than 5500Mpa at the temperature of 200-300 ℃ and higher than 5000Mpa at the temperature of 300-350 ℃.
2. The tungsten alloy wire according to claim 1, wherein: the diameter is 15-45 μm.
3. A method for producing the tungsten alloy wire according to claim 1 or 2, characterized in that: the method comprises the following steps:
(1) Preparing an alloy rod: mixing single metal powder according to the mass ratio of each element in the components of the alloy wire, then putting the mixture into a mould, and performing hot isostatic pressing twice to obtain an alloy rod;
(2) Carrying out rotary swaging to process an alloy rod;
(3) Drawing at 600-2500 deg.C;
(4) Low-temperature drawing is carried out at 200-350 ℃.
4. The method for producing a tungsten alloy wire according to claim 3, wherein: the purity of the simple substance metal powder in the step (1) is higher than 99.9%, and the particle size is 3-4 μm.
5. The method for producing a tungsten alloy wire according to claim 3, wherein: the rotary swaging temperature in the step (2) is 1400-1450 ℃.
6. The method for producing a tungsten alloy wire according to claim 3, wherein: in the high-temperature drawing process in the step (3), the strength of the tungsten alloy wire is 50-70Mpa at 2300-2500 ℃, and is 200-1000Mpa at 10-40 ℃.
7. The method for producing a tungsten alloy wire according to claim 3, wherein: in the step (4), the low-temperature drawing annealing adopts step-type heating, and the heating rate is as follows: room temperature-500 deg.C: 100 ℃/min;500-750 ℃:80 ℃/min;750-800 ℃:50 ℃/min, and the total time is 30-45 minutes.
8. The method for producing a tungsten alloy wire according to claim 3, wherein: and (4) carrying out 45-60-pass drawing for 2 times in total in the low-temperature drawing process.
9. The method for producing a tungsten alloy wire according to claim 3, wherein: in the low-temperature drawing process in the step (4), annealing treatment is performed for one time between two times of drawing, and the temperature is 750-800 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310096216.1A CN115976387B (en) | 2023-02-10 | 2023-02-10 | Tungsten alloy wire with high strength and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310096216.1A CN115976387B (en) | 2023-02-10 | 2023-02-10 | Tungsten alloy wire with high strength and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115976387A true CN115976387A (en) | 2023-04-18 |
| CN115976387B CN115976387B (en) | 2024-04-12 |
Family
ID=85963215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310096216.1A Active CN115976387B (en) | 2023-02-10 | 2023-02-10 | Tungsten alloy wire with high strength and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115976387B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63170844A (en) * | 1987-01-09 | 1988-07-14 | 東京タングステン株式会社 | Tungsten wire for tubular bulb |
| US5028756A (en) * | 1988-10-18 | 1991-07-02 | Sumitomo Electric Industries, Ltd. | Electrode wire for electric spark cutting |
| CN110527885A (en) * | 2019-09-02 | 2019-12-03 | 广州市华司特合金制品有限公司 | A kind of tungsten alloy material |
| CN113186438A (en) * | 2021-01-20 | 2021-07-30 | 厦门虹鹭钨钼工业有限公司 | Alloy wire and preparation method and application thereof |
| CN114345976A (en) * | 2021-12-30 | 2022-04-15 | 镇江原轼新型材料有限公司 | Novel preparation process capable of improving heat conductivity and electric conductivity of wire saw |
| CN114381643A (en) * | 2021-12-30 | 2022-04-22 | 镇江原轼新型材料有限公司 | High-density tungsten alloy wire and preparation method thereof |
| CN114480936A (en) * | 2022-02-24 | 2022-05-13 | 佛山宁宇科技股份有限公司 | High-performance rare earth alloy tungsten cutting wire |
| CN114855046A (en) * | 2022-05-07 | 2022-08-05 | 浙江东尼电子股份有限公司 | Tungsten alloy wire and preparation method thereof |
| CN114888292A (en) * | 2022-05-11 | 2022-08-12 | 陕西汇联聚合新材料有限公司 | Preparation method of high-strength superfine tungsten alloy wire for cutting |
| CN115679174A (en) * | 2022-11-04 | 2023-02-03 | 中南大学 | Super-strong tungsten filament and preparation method thereof |
-
2023
- 2023-02-10 CN CN202310096216.1A patent/CN115976387B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63170844A (en) * | 1987-01-09 | 1988-07-14 | 東京タングステン株式会社 | Tungsten wire for tubular bulb |
| US5028756A (en) * | 1988-10-18 | 1991-07-02 | Sumitomo Electric Industries, Ltd. | Electrode wire for electric spark cutting |
| CN110527885A (en) * | 2019-09-02 | 2019-12-03 | 广州市华司特合金制品有限公司 | A kind of tungsten alloy material |
| CN113186438A (en) * | 2021-01-20 | 2021-07-30 | 厦门虹鹭钨钼工业有限公司 | Alloy wire and preparation method and application thereof |
| CN114345976A (en) * | 2021-12-30 | 2022-04-15 | 镇江原轼新型材料有限公司 | Novel preparation process capable of improving heat conductivity and electric conductivity of wire saw |
| CN114381643A (en) * | 2021-12-30 | 2022-04-22 | 镇江原轼新型材料有限公司 | High-density tungsten alloy wire and preparation method thereof |
| CN114480936A (en) * | 2022-02-24 | 2022-05-13 | 佛山宁宇科技股份有限公司 | High-performance rare earth alloy tungsten cutting wire |
| CN114855046A (en) * | 2022-05-07 | 2022-08-05 | 浙江东尼电子股份有限公司 | Tungsten alloy wire and preparation method thereof |
| CN114888292A (en) * | 2022-05-11 | 2022-08-12 | 陕西汇联聚合新材料有限公司 | Preparation method of high-strength superfine tungsten alloy wire for cutting |
| CN115679174A (en) * | 2022-11-04 | 2023-02-03 | 中南大学 | Super-strong tungsten filament and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 鲁利国;夏耀勤;: "钨合金的开发和应用现状", 中国钨业, no. 03, 15 June 2008 (2008-06-15), pages 37 - 39 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115976387B (en) | 2024-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114381643B (en) | High-density tungsten alloy wire and preparation method thereof | |
| CN110578067B (en) | Sintering method of superfine hard alloy | |
| CN114888292A (en) | Preparation method of high-strength superfine tungsten alloy wire for cutting | |
| CN101177748A (en) | Method for manufacturing difficult-to-form pure rhenium sheet | |
| CN108160995A (en) | The preparation method of pure rhenium product | |
| CN114345976B (en) | Novel preparation process capable of improving heat conductivity and electric conductivity of wire saw | |
| CN114635069A (en) | High-strength-toughness medium-entropy alloy binding phase Ti (C, N) -based metal ceramic and preparation method thereof | |
| CN112410599A (en) | Preparation method of high-entropy alloy matrix diamond tool bit | |
| CN110976801A (en) | Method for preparing silver tin oxide indium oxide contact material by up-drawing continuous casting process | |
| CN115976387B (en) | Tungsten alloy wire with high strength and preparation method thereof | |
| CN112756613B (en) | Grinding wheel for processing high-strength high-hardness ceramics and preparation method thereof | |
| CN116334463A (en) | Ultra-long high-strength ultra-fine tungsten alloy wire and preparation method thereof | |
| CN117004857A (en) | High-strength and high-toughness tungsten alloy and preparation method thereof | |
| CN114774750A (en) | Tungsten carbide material bonded by enhanced high-entropy alloy and preparation method thereof | |
| CN115106527A (en) | Multistage sintering method of high-strength titanium alloy part based on spark plasma sintering | |
| CN109182826B (en) | High-strength-toughness low-resistivity silver-gold alloy bonding wire | |
| CN118218599B (en) | Preparation method of high-strength tungsten alloy wire | |
| CN102310107A (en) | Precision alloy round wire drawing technology | |
| CN112195366A (en) | High-thermal-stability equiaxial nanocrystalline Ti-Zr-Ag alloy and preparation method thereof | |
| CN111590071B (en) | Molybdenum-niobium alloy target material and preparation method thereof | |
| CN113584344B (en) | Copper alloy annealed conducting ring and preparation method thereof | |
| CN118162615B (en) | Preparation method of large-size tungsten core rod | |
| CN115351277B (en) | Graphene copper composite material and preparation method and application thereof | |
| CN117867353A (en) | High-strength tungsten alloy material and preparation method and application thereof | |
| CN111996403B (en) | Preparation method of lead-free indium tin-based solder alloy and prepared solder alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |