CN115976387B - Tungsten alloy wire with high strength and preparation method thereof - Google Patents
Tungsten alloy wire with high strength and preparation method thereof Download PDFInfo
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- CN115976387B CN115976387B CN202310096216.1A CN202310096216A CN115976387B CN 115976387 B CN115976387 B CN 115976387B CN 202310096216 A CN202310096216 A CN 202310096216A CN 115976387 B CN115976387 B CN 115976387B
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- 229910001080 W alloy Inorganic materials 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [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 compound [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 compound [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 28
- 239000000956 alloy Substances 0.000 claims description 28
- 238000000137 annealing Methods 0.000 claims description 14
- 238000005242 forging Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000001513 hot isostatic pressing Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 5
- 229910003460 diamond Inorganic materials 0.000 description 5
- 239000010432 diamond Substances 0.000 description 5
- 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
- 239000002245 particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010959 steel Substances 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
- 230000009286 beneficial effect Effects 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
- 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
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Abstract
The invention discloses a tungsten alloy wire with high strength and a preparation method thereof, wherein 0.5-1.5wt% of lanthanum, 0.1-1.0wt% of cobalt or iron and the balance of tungsten are contained in the components, the strength of the tungsten alloy wire is higher than 7000Mpa at room temperature, the strength is 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 high elastic modulus, high conductivity and other advantages, and have high strength and good toughness. 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 rods of the carbon steel diamond wires commonly used in the market at present is Japanese monopoly, but the preparation technology of the tungsten alloy wires cannot be made at home, and the large-scale mass production can be realized by the mature technology at home, so that the development of the carbon steel wire rods of the tungsten alloy wires can not only improve the productivity and the quality, but also solve the feeding and supplying problems.
Although the pure tungsten wire can be drawn to below 10 mu m, the strength is lower, the pure tungsten wire cannot be used for producing diamond wires, other elements are required to be added to improve the performance, common addition elements such as rhenium, molybdenum, cobalt, chromium, iron and the like can be added to improve the strength to above 6000MPa, and if the strength is improved by changing a drawing die chain, wire breakage is easily caused in the drawing process, so that a certain problem exists.
Disclosure of Invention
The invention aims to: the invention aims to provide a tungsten alloy wire with low drawing breakage rate and high strength; another object of the invention is to provide a method for preparing the tungsten alloy wire.
The technical scheme is as follows: the tungsten alloy wire with high strength 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 70000 Mpa at 0-40 ℃, higher than 6000Mpa at 40-200 ℃, higher than 5500Mpa at 200-300 ℃ and higher than 5000Mpa at 300-350 ℃.
Further, 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: according to the mass ratio of each element in the alloy wire components, mixing the simple substance metal powder, filling the mixture into a die, and performing hot isostatic pressing for two times to obtain an alloy rod;
(2) Performing rotary forging on the alloy rod;
(3) Drawing at 600-2500 deg.c;
(4) Drawing at 200-350deg.C.
Further, the purity of the elemental 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 200-1000Mpa at 10-40 ℃.
Further, in the step (4), the low-temperature drawing annealing adopts a step-type heating, and the heating rate is: room temperature-500 deg.c: 100 ℃/min;500-750 deg.C: 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 for 45-60 times, and an annealing treatment is carried out between the two drawing at the temperature of 750-800 ℃.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages:
(1) High-temperature strength, and strength higher than 5000Mpa at 300-350 ℃;
(2) The drawing broken wire rate is lower than 2%;
(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 a diameter of 15 μm, and reduces cutting loss.
Detailed Description
The technical scheme of the invention is further described below by referring to examples.
Example 1
The alloy composition of the embodiment is W-1La-1Co (lanthanum: 1.0wt%, cobalt: 1.0wt%, and the balance tungsten), the breaking force after processing into 15 μm alloy wire is 5.1N, the strength at room temperature is 7215Mpa, and the drawing breaking rate 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 alloy wire components, pure metal powder with purity higher than 99.9 percent and particle diameter of 3-4 mu m is mixed and then is put into a steel mould with diameter of 100mm, and the alloy rod with diameter of 35mm is obtained by hot isostatic pressing at 1200 ℃ and 1800 ℃ for two times;
(2) And (3) rotary forging: the rotary forging temperature is 1400-1450 ℃, the total pass is 20, and the diameter of the alloy rod is processed from 35mm rotary forging to 9mm;
(3) High-temperature drawing: drawing is carried out for 6 times for 40 times, the first drawing is carried out from 9mm to 8mm, the temperature is 2450 ℃, the total drawing is carried out for 1 time, the strength at the temperature is higher than 50Mpa, and the strength at the room temperature after drawing is higher than 200Mpa. Drawing from 8mm to 6mm for the second time at 700 ℃ for 10 passes. Drawing from 6mm to 5mm for the third time, wherein the temperature is 2400 ℃ for 1 pass, the strength at the temperature is higher than 60Mpa, and the strength at room temperature after drawing is higher than 500Mpa. Drawing from 5mm to 3mm for the fourth time at 650 ℃ for 12 passes. Drawing from 3mm to 2mm for the fifth time, wherein the temperature is 2350 ℃ for 1 pass, the strength at the temperature 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) Drawing at low temperature: drawing for 2 times in 45-60 times, firstly drawing from 0.60mm to 0.15mm for 30 times, wherein the temperature is 350 ℃, then annealing treatment is carried out for one time, the temperature is 800 ℃, and the temperature rising rate is adopted by step heating: room temperature-500 deg.c: 100 ℃/min;500-750 deg.C: 80 ℃/min;750-800℃:50 ℃/min, the total duration is 30 minutes. After annealing, the annealing is carried out by pulling from 0.15mm to less than 0.045mm for 15-30 times, and the temperature is 200-300 ℃.
Example 2
The alloy composition of this example was W-0.7La-1Fe (lanthanum: 0.7wt%, iron: 1.0wt%, the balance being tungsten), the breaking force after processing into 15 μm alloy wire was 5.0N, the measured strength was 7073MPa, and the wire breakage rate after drawing was 1.8%.
(1) Preparing an alloy rod: according to the mass ratio of each element in the alloy wire components, powder with purity higher than 99.9 percent and particle diameter of 3-4 mu m is mixed and then is put into a steel mould with diameter of 100mm, and the alloy rod with diameter of 35mm is obtained by hot isostatic pressing for two times at 1200 ℃ and 1800 ℃;
(2) And (3) rotary forging: the rotary forging temperature is 1400-1450 ℃, the total pass is 20, and the diameter of the alloy rod is processed from 35mm rotary forging to 9mm;
(3) High-temperature drawing: drawing is carried out for 6 times for 40 times, the first drawing is carried out from 9mm to 8mm, the temperature is 2450 ℃, the total drawing is carried out for 1 time, the strength at the temperature is higher than 50Mpa, and the strength at the room temperature after drawing is higher than 200Mpa. Drawing from 8mm to 6mm for the second time at 700 ℃ for 10 passes. Drawing from 6mm to 5mm for the third time, wherein the temperature is 2400 ℃ for 1 pass, the strength at the temperature is higher than 60Mpa, and the strength at room temperature after drawing is higher than 500Mpa. Drawing from 5mm to 3mm for the fourth time at 650 ℃ for 12 passes. Drawing from 3mm to 2mm for the fifth time, wherein the temperature is 2350 ℃ for 1 pass, the strength at the temperature 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) Drawing at low temperature: drawing for 2 times in 45-60 times, firstly drawing from 0.60mm to 0.15mm for 30 times, wherein the temperature is 350 ℃, then annealing treatment is carried out for one time, the temperature is 800 ℃, and the temperature rising rate is adopted by step heating: room temperature-500 deg.c: 100 ℃/min;500-750 deg.C: 80 ℃/min;750-800℃:50 ℃/min, the total duration is 30 minutes. After annealing, the annealing is carried out by pulling from 0.15mm to less than 0.045mm for 15-30 times, and the temperature is 200-300 ℃.
Comparative example 1
The alloy composition of the application example is W-1Re-1Co (Re: 0.7wt%, co: 1.0wt%, and the balance W), the breaking force after processing into 15 μm alloy wire is 4.5N, the measured strength is 6366Mpa, and the drawing breaking rate is 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 after processing to 40 mu m is 6.2N, the measured strength is 4933Mpa, and the drawing breaking rate is 5.2%.
After the diamond wires of examples 1 to 4 were formed, the M10-sized silicon wafers were cut, the cutting tension was set to 3.0N, the number of cutting blades was not less than 100, and the results are shown in table 1.
TABLE 1
As can be seen from Table 1, the lanthanum-containing ultra-high strength tungsten alloy wire of the present invention has low breakage rate and high strength in the drawing production process, and the wire saw has low loss and high product yield after being manufactured, thereby meeting the requirements of high quality, high efficiency and low loss.
Claims (6)
1. A tungsten alloy wire having high strength, characterized in that: 0.5 to 1.5 weight percent of lanthanum, 0.1 to 1.0 weight percent of cobalt or iron and the balance of tungsten; the strength of the tungsten alloy wire is higher than 70000 MPa at 0-40 ℃, is higher than 6000MPa at 40-200 ℃, is higher than 5500MPa at 200-300 ℃ and is higher than 5000MPa at 300-350 ℃; 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 alloy wire components, mixing the simple substance metal powder, filling the mixture into a die, and performing hot isostatic pressing for two times to obtain an alloy rod;
(2) Performing rotary forging on the alloy rod;
(3) Drawing at 600-2500 deg.c; carrying out 40 times of drawing, wherein the temperature is 2450 ℃ for the first time, the strength is higher than 50MPa at the temperature, the strength is higher than 200MPa at room temperature after drawing, the temperature is 700 ℃ for the second time, the strength is higher than 60MPa at the temperature, the strength is higher than 500MPa at the room temperature, the strength is 2350 ℃ at the fourth time, the strength is higher than 12 times, the strength is higher than 1000MPa at the room temperature, the strength is 2350 ℃ at the temperature, the strength is higher than 70MPa at the temperature, the strength is higher than 1000MPa at the room temperature after drawing, the strength is 0.60mm at the sixth time, and the temperature is 600 ℃ at the temperature, and the strength is higher than 500MPa at the room temperature after drawing, the strength is higher than 3mm at the fourth time, the strength is 2350 ℃ at the temperature, and the total 15 at the temperature is higher than 600 ℃.
(4) Drawing at 200-350 deg.c; drawing for 2 times in 45-60 times, firstly drawing from 0.60mm to 0.15mm for 30 times, wherein the temperature is 350 ℃, then annealing treatment is carried out for one time, the temperature is 800 ℃, and the temperature rising rate is adopted by step heating: room temperature-500 deg.c: 100 ℃/min;500-750 deg.C: 80 ℃/min;750-800℃:50 ℃/min, total duration of 30 minutes, and after annealing, the annealing is carried out from 0.15mm to less than 0.045mm for 15-30 times, and the temperature is 200-300 ℃.
2. A tungsten alloy wire as set forth in claim 1 wherein: the diameter is 15-45 μm.
3. A method of producing the tungsten alloy wire as set forth in claim 1 or 2, characterized in that: the method comprises the following steps:
(1) Preparing an alloy rod: according to the mass ratio of each element in the alloy wire components, mixing the simple substance metal powder, filling the mixture into a die, and performing hot isostatic pressing for two times to obtain an alloy rod;
(2) Performing rotary forging on the alloy rod;
(3) Drawing at 600-2500 deg.c; carrying out 40 times of drawing, wherein the temperature is 2450 ℃ for the first time, the strength is higher than 50MPa at the temperature, the strength is higher than 200MPa at room temperature after drawing, the temperature is 700 ℃ for the second time, the strength is higher than 60MPa at the temperature, the strength is higher than 500MPa at the room temperature, the strength is 2350 ℃ at the fourth time, the strength is higher than 12 times, the strength is higher than 1000MPa at the room temperature, the strength is 2350 ℃ at the temperature, the strength is higher than 70MPa at the temperature, the strength is higher than 1000MPa at the room temperature after drawing, the strength is 0.60mm at the sixth time, and the temperature is 600 ℃ at the temperature, and the strength is higher than 500MPa at the room temperature after drawing, the strength is higher than 3mm at the fourth time, the strength is 2350 ℃ at the temperature, and the total 15 at the temperature is higher than 600 ℃.
(4) Drawing at 200-350 deg.c; drawing for 2 times in 45-60 times, firstly drawing from 0.60mm to 0.15mm for 30 times, wherein the temperature is 350 ℃, then annealing treatment is carried out for one time, the temperature is 800 ℃, and the temperature rising rate is adopted by step heating: room temperature-500 deg.c: 100 ℃/min;500-750 deg.C: 80 ℃/min;750-800℃:50 ℃/min, total duration of 30 minutes, and after annealing, the annealing is carried out from 0.15mm to less than 0.045mm for 15-30 times, and the temperature is 200-300 ℃.
4. A method of 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 percent, and the grain diameter is 3-4 mu m.
5. A method of producing a tungsten alloy wire according to claim 3, wherein: the temperature of the rotary forging in the step (2) is 1400-1450 ℃.
6. A method of 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 200-1000MPa at 10-40 ℃.
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