CN103205635A - Method for producing VD high-alloyed tool steel - Google Patents
Method for producing VD high-alloyed tool steel Download PDFInfo
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- CN103205635A CN103205635A CN2013101239867A CN201310123986A CN103205635A CN 103205635 A CN103205635 A CN 103205635A CN 2013101239867 A CN2013101239867 A CN 2013101239867A CN 201310123986 A CN201310123986 A CN 201310123986A CN 103205635 A CN103205635 A CN 103205635A
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Abstract
A method for producing VD high-alloyed tool steel comprises the following steps: 1) smelting; 2) first slagging; 3) second slagging; 4) taking a second spectrum sample; 5) refining; 6) blowing argon; 7) inserting a calcium line into liquid steel; 8) discharging mixed steel and slag; and 9) casting in vacuum. According to the invention, by weight percentage, partial cheap carbon and silicon are used for substituting for tungsten and molybdenum in M2 steel, so that the dosage of tungsten and molybdenum is reduced by 40% and the cost of dosing is reduced by about ****Yuan/ton in contrast with M2 steel. By a dual refining method, the VD steel is improved in wear resistance by 30-50% in contrast than M2 steel; and the milling speed of an end mill made of the VD high-alloyed tool steel is improved by 1.13-1.27 times. Furthermore, the content of O(T) of the VD high-alloyed tool steel is controlled below 30 PPM (parts per million), while H is less than or equal to 3 PPM and N is less than 150 PPM; and the raw material N is reduced by 15%-20% on the basis of the previous content thereof.
Description
Technical field
The present invention relates to a kind of production method of VD high alloy tool steel.
Background technology
W6M05Cr4V2(M
2) steel (6-5-4-2) is the U.S. in the high-speed tool steel kind (being commonly called as tungsten is rapid tool steel) of nineteen thirty-five exploitation.Calibration before and after nineteen fifty mainly is used as instruments such as producing drill bit, screw tap, milling cutter, hobboing cutter.The output of whole world high-speed tool steel material is about about 200,000 tons M at present
2Account for 60-70%.M
2Steel belongs to high alloy tool steel, has used a large amount of strategic resource element (6% tungsten, 5% molybdenum, 2% vanadium).The main alloy element of high alloy tool steel has tungsten, pincers, chromium and vanadium etc., all is carbide forming element, and their reserves on earth are limited, wherein particularly tungsten and molybdenum reserves still less, valuable and rare, must save use.In order to reduce the usage quantity of noble metal, seeking a kind of element of tungsten, molybdenum content that can partly replace becomes top priority.
Summary of the invention
At above deficiency, the purpose of this invention is to provide the VD high alloy tool steel of a kind of high rigidity, high tenacity, use M
2Replace tungsten and molybdenum with part cheap carbon and silicon in the steel rapid tool steel, its smelting technology adopts intermediate frequency to smelt two purifying methods (the TN method is adopted in refining in the stove)+vacuum casting (BV method) direct production steel ingot and electrode bar, after enter the electric furnace remelting, make the VD high alloy tool steel have good hardness and toughness.
Technical scheme of the present invention realizes in the following manner: a kind of production method of VD high alloy tool steel, by weight percentage, may further comprise the steps: 1) fusing, 2) make slag, 3 for the first time) make slag, 4 for the second time) get spectrum sample, 5 for the second time) refining, 6) Argon, 7) calcium line inserts molten steel, 8) slag mixes out, 9) vacuum casting; It is characterized in that:
1), fusing: get C1.0 ± 0.1%, Si 0.85 ± 0.1%, Mn 1.0 ± 0.1%, Mo 4.0 ± 0.1%, W 1.6 ± 0.1%, V 1.95 ± 0.1%, P≤0.023%, S≤0.003%, all the other are iron; In the intermediate frequency smelting furnace, be molten into molten steel successively;
2), make slag for the first time: adopt lime to make basic slag, get and account for molten steel weight 2.5-3% lime, be transferred to starchiness with Ying stone, carry out hand mixing, get spectrum sample for the first time after evenly, test the Chemical Composition of each alloying element in the molten steel;
3), make slag for the second time, additional alloy is adjusted to the composition of each element proportion in the step 1) and carries out deoxidation, desulfurization, its quantity of slag accounts for 2.5% of molten steel weight;
4), get spectrum sample for the second time: test Chemical Composition again, accurately the composition of tungsten, molybdenum element;
5), refining: enter refining period after the chemical ingredients of molten steel is qualified, the time, refining temperature was at 1580 ℃ at 20-25 minutes--and 1600 ℃;
6), Argon: furnace bottom Argon and refining are carried out simultaneously, Argon amount per minute 25L, the purity of argon gas is 99.995%;
7), calcium line inserts molten steel: molten steel first three minute of tapping inserted molten steel with calcium line, calcium line use 0.1-0.3% as molten steel weight, prepare tapping, with the slag fragmentation;
8), slag mixes out: tap to slag mixes out, after molten steel is poured ladle into, tapped after should calming 2-3 minutes again;
9), vacuum casting: molten steel is carried out vacuum casting, opens and water temperature: 1470 ℃ on steel ingot---1490 ℃, 1490 ℃ of electrode bars--1510 ℃.
Description of drawings
Fig. 1 is the present invention and M
2The wear resistance of steel, D950 steel relatively.
Fig. 2 is VD steel and M
2Steel, three kinds of materials of D950 steel and tooth-like wheel are done the contrast of sliding (rolling) moving wearing and tearing wear resistance to taking turns.
Fig. 3 is the tempering process curve of quenching of VD steel.
Fig. 4 is VD steel and M
2Steel is made the boring numerical value contrast behind the drill bit.
Fig. 5 is VD steel and M
2The length of cut numerical value contrast of making slotting cutter of steel.
Fig. 6 is the tempering temperature contrast.
The present invention, carbon and the silicon cheap with part replace M
2Tungsten in the steel and molybdenum make the consumption of tungsten and molybdenum reduce 40%, and the batching cost is than M
2Steel reduces about 13400 yuan/ton.Adopt two purifying methods, its VD steel is than M
2The steel wear resistance is carried 30-50%; The milling speed of making slotting cutter improves 1.13 times--and-1.27 times.Its O
(T)Content control below 30PPM, H≤3PPM, N＜150PPM, and reduce 15%--20% on the basis of raw material N content.
Embodiment
Embodiment 1:
A kind of VD high alloy tool steel, be made up of following composition: C1.0%, Si 0.85%, Mn 1.0%, Mo 4.0%, W 1.6%, V 1.95%, P≤0.023%, S≤0.003%, all the other are iron.
Embodiment 2:
A kind of VD high alloy tool steel, be made up of following composition: C0.950%, Si 0.90%, Mn 1.1%, Mo 4.05%, W 1.55%, V 1.9%, P≤0.023%, S≤0.003%, all the other are iron.
Embodiment 3:
A kind of VD high alloy tool steel, be made up of following composition: C1.1%, Si 0.80%, Mn 0.9%, Mo 4.1%, W 1.5%, V 2.0%, P≤0.023%, S≤0.003%, all the other are iron.
The production method of above-described embodiment 1-3 by weight percentage, may further comprise the steps:
1, fusing: get the composition among the embodiment 1-3; In the intermediate frequency smelting furnace, be molten into molten steel successively.
2, make slag for the first time: adopt lime to make basic slag, get and account for molten steel weight 2.5-3% lime, be transferred to starchiness with Ying stone, in molten steel, carry out hand mixing, get the spectrum sample first time after evenly, test the Chemical Composition of each element.
3, make slag for the second time, additional alloying element is adjusted to the composition of proportion in the step 1 and carries out deoxidation, desulfurization, and its quantity of slag accounts for 2.5% of molten steel weight.
4, get spectrum sample for the second time: test Chemical Composition again, accurately the composition of tungsten, molybdenum element.
5, refining: enter refining period after the chemical ingredients of molten steel is qualified, the time, refining temperature was at 1580 ℃ at 20-25 minutes--and 1600 ℃.
6, Argon: furnace bottom Argon and refining are carried out simultaneously, Argon amount per minute 25L, and the purity of argon gas is 99.995%.
7, calcium line inserts molten steel: molten steel first three minute of tapping inserted molten steel with calcium line, calcium line use 0.1-0.3% as molten steel weight, prepare tapping, with the slag fragmentation.
8, slag mixes out: tap to slag mixes out, and after molten steel is poured ladle into, tapping again after should calming 2-3 minutes.
9, vacuum casting: molten steel is carried out vacuum casting, open and water temperature: 1470 ℃ on steel ingot---1490 ℃, 1490 ℃ of electrode bars--1510 ℃.
Being known by Fig. 1, is the present invention and M
2The dry sliding wear patience contrast of steel, three kinds of materials of D950 steel (rapid steel of Sweden), under equal test condition, the wear resistance of VD steel is than M
2Steel is high by about 30%.
Fig. 2 is M
2Steel, the D950 steel, three kinds of materials of VD steel and tooth-like wheel are done the contrast of sliding (rolling) moving wearing and tearing wear resistance to taking turns, three kinds of rapid steel of M2.D950 VD and tooth-like wheel pair roller are done sliding (rolling) moving wearing test result to rolling ring GCr15 tooth-like wheel, rotating speed 200r/min load 150N, wearing-in period 1h, under equal conditions, wear resistance is than M
2Steel exceeds more than 50%.
Fig. 3 is the tempering process curve of quenching of VD steel.
Fig. 4 is VD steel and M
2Steel is made the boring numerical value contrast behind the drill bit, under equal conditions four kinds of super M of bit bore numerical value that drilling speed VD steel is made
21.22-1.91 times of steel.
Fig. 5 is VD steel and M
2The length of cut numerical value contrast of making slotting cutter of steel, the under equal conditions super M of slotting cutter milling length that makes with milling speed VD steel
21.13 times-1.27 times of steel.
Fig. 6 is that tempering temperature is to M
2Steel, D950 steel, the influence of VD steel dry sliding wear wear resistance.Tempering temperature is taken turns rotating speed 200r/min, load 150N, wearing-in period 1h to the influence of rapid steel dry sliding wear wear resistance to mill part GCr15 circle.
Claims (1)
1. the production method of a VD high alloy tool steel, by weight percentage, may further comprise the steps: 1) fusing, 2) make slag, 3 for the first time) make slag, 4 for the second time) get spectrum sample, 5 for the second time) refining, 6) Argon, 7) calcium line inserts molten steel, 8) slag mixes out, 9) vacuum casting; It is characterized in that:
1), fusing: get C1.0 ± 0.1%, Si 0.85 ± 0.1%, Mn 1.0 ± 0.1%, Mo 4.0 ± 0.1%, W 1.6 ± 0.1%, V 1.95 ± 0.1%, P≤0.023%, S≤0.003%, all the other are iron; In the intermediate frequency smelting furnace, be molten into molten steel successively;
2), make slag for the first time: adopt lime to make basic slag, get and account for molten steel weight 2.5-3% lime, be transferred to starchiness with Ying stone, carry out hand mixing, get spectrum sample for the first time after evenly, test the Chemical Composition of each alloying element in the molten steel;
3), make slag for the second time, additional alloy is adjusted to the composition of each element proportion in the step 1) and carries out deoxidation, desulfurization, its quantity of slag accounts for 2.5% of molten steel weight;
4), get spectrum sample for the second time: test Chemical Composition again, accurately the composition of tungsten, molybdenum element;
5), refining: enter refining period after the chemical ingredients of molten steel is qualified, the time, refining temperature was at 1580 ℃ at 20-25 minutes--and 1600 ℃;
6), Argon: furnace bottom Argon and refining are carried out simultaneously, Argon amount per minute 25L, the purity of argon gas is 99.995%;
7), calcium line inserts molten steel: molten steel first three minute of tapping inserted molten steel with calcium line, calcium line use 0.1-0.3% as molten steel weight, prepare tapping, with the slag fragmentation;
8), slag mixes out: tap to slag mixes out, after molten steel is poured ladle into, tapped after should calming 2-3 minutes again;
9), vacuum casting: molten steel is carried out vacuum casting, opens and water temperature: 1470 ℃ on steel ingot---1490 ℃, 1490 ℃ of electrode bars--1510 ℃.
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| CN2013101239867A CN103205635A (en) | 2013-04-10 | 2013-04-10 | Method for producing VD high-alloyed tool steel |
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| CN2013101239867A CN103205635A (en) | 2013-04-10 | 2013-04-10 | Method for producing VD high-alloyed tool steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022682A (en) * | 2018-08-13 | 2018-12-18 | 林州凤宝管业有限公司 | A kind of production method of VD steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131180A (en) * | 1997-10-28 | 1999-05-18 | Mitsui Eng & Shipbuild Co Ltd | Wear resistant steel |
| CN101328555A (en) * | 2007-06-22 | 2008-12-24 | 大冶特殊钢股份有限公司 | Mixing method of high quality low phosphor and sulfur high-alloy steel |
| CN101429624A (en) * | 2007-11-06 | 2009-05-13 | 赵云峰 | High-speed tool steel |
-
2013
- 2013-04-10 CN CN2013101239867A patent/CN103205635A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131180A (en) * | 1997-10-28 | 1999-05-18 | Mitsui Eng & Shipbuild Co Ltd | Wear resistant steel |
| CN101328555A (en) * | 2007-06-22 | 2008-12-24 | 大冶特殊钢股份有限公司 | Mixing method of high quality low phosphor and sulfur high-alloy steel |
| CN101429624A (en) * | 2007-11-06 | 2009-05-13 | 赵云峰 | High-speed tool steel |
Non-Patent Citations (3)
| Title |
|---|
| 王振东: "《感应炉冶炼工艺技术》", 31 January 2012 * |
| 罗迪，等: "近年高速工具钢的发展概况", 《特殊钢》 * |
| 薄鑫涛，等: "当前合金工具钢生产工艺技术的发展", 《热处理技术与装备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022682A (en) * | 2018-08-13 | 2018-12-18 | 林州凤宝管业有限公司 | A kind of production method of VD steel |
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Application publication date: 20130717 |