CN100381599C - Low cost high-speed steel - Google Patents
Low cost high-speed steel Download PDFInfo
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- CN100381599C CN100381599C CNB2005100031138A CN200510003113A CN100381599C CN 100381599 C CN100381599 C CN 100381599C CN B2005100031138 A CNB2005100031138 A CN B2005100031138A CN 200510003113 A CN200510003113 A CN 200510003113A CN 100381599 C CN100381599 C CN 100381599C
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Abstract
The present invention relates to high-speed steel with low cost, which is formed by adding alloy elements and a small amount of mo, v and al to c, cr, si, mn and w which are primary. The product has the characteristics of high toughness, hardness, red hardness and yield, excellent hot-working character, difficult quenching crack, etc., can replace ordinary high-speed steel and is used for manufacturing cutting tools, moulds and wearing pieces which work at high temperature. Because the amount of the valuable alloy elements such as mo, v w which are added is small, the present invention has the advantage of low cost.
Description
Technical field:
The present invention relates to a kind of rapid steel cheaply, belong to the technical field of metallurgical technology.
Background technology:
In traditional rapid steel and high alloy tool steel, because it contains a large amount of noble element W, Mo, V etc., so the costing an arm and a leg of this class material.People have invented multiple low-alloy high-speed steel or Low Alloy Tool Steel comes instead of part universal high speed steel or high alloy tool steel for this reason, to reduce use cost, as the patent No. 98111868.2 " a kind of low-alloy high-speed steel containing aluminium ", but alloying element amounts such as contained on the one hand noble element W, the Mo of these low-alloy high-speed steels, V are still higher, and material cost is still higher; On the other hand, it waits noble elements such as replacing W, Mo, V to reduce above-mentioned alloy content by adding more non-carbide forming element Al, Si, but can increase decarburization susceptibility owing to add non-carbide forming element Al, Si etc., reduce steel toughness and hot workability, when heat, can produce the inhomogeneous phenomenon such as grow up of crystal grain, and reduce noble element W, Mo, V also can make AUSTENITE GRAIN COARSENING.These factors have hindered the application and the development of low-alloy high-speed steel.
Summary of the invention:
The objective of the invention is to: a kind of rapid steel cheaply is provided, and its with low cost and excellent performance is to solve the deficiency that the alloy tool steel that uses in the prior art exists.
The present invention constitutes like this: it is main addition element with C, Cr, Si, Mn, W, add a small amount of Mo, V, Al again, according to weight percentage, its chemical ingredients scope is: C 0.9～1.5, Cr 4.0～8.0, Si 1.0～2.0, Mn 0.9～2.2, W 1.0～3.0, Al 0.5～1.2, Mo 0.5～1.5, V 0.4～1.5, and all the other are Fe; One or more the element that also can contain trace in the steel is as follows, and its weight percentage is: Nb 0.03～0.2, RE 0.006～0.04, Ti 0.03～0.2; S in the steel, P are impurity, and its weight percentage is S≤0.02, P≤0.03.
For significantly reducing material cost, guarantee the fundamental property of rapid steel simultaneously, the present invention has added cheap elements such as more Cr, Mn, Si, Al, and its amount accounts for 70% of alloy total amount.On the basis of low-alloy high-speed steel, further reduce the content of W, Mo, V, material cost is reduced significantly.To Mn, Si, these cheap alloying elements of Al, mostly as harmful element, be not add or seldom add in traditional rapid steel, particularly alloying element Mn increase residual austenite amount, reduce thermostability, alligatoring austenite crystal, make machinability variation etc.But these elements the add-on that is fit to and with the cooperating and can effectively avoid above-mentioned weakness of Si, Al by thermal treatment process.They have remarkably influenced to steel temper resistance, secondary hardening to draw alloying element Mn, Si, Al, Cr by research, and its effect is had nothing in common with each other.Wherein the Mn element can dissolve in the carbide, reduces their interatomic bonding force, promotes the carbide dissolving to enter austenite, thereby makes more carbon and alloying element dissolve in austenite, produces significant secondary hardening effect in drawing process.Mn cooperates the distributing homogeneity that can significantly improve carbide with Si, Al simultaneously, thereby obtain to have high-strong toughness, high rigidity, and has a high red hardness, hot workability excellence, lumber recovery height, be difficult for characteristics such as hardening break, can replace common rapid steel, be used to the wearing piece of making cutting tool, mould and at high temperature working.
Compared with prior art, the present invention has following characteristics: (1), material cost are cheap especially, and cost only is 1/3 of an existing universal high speed steel; (2), have excellent hot workability, lumber recovery height; (3) distribution of carbides is even, tiny, and crystal grain is tiny; (4), have high toughness, can repeat to quench is difficult for hardening break, can adopt the air cooling mode to reduce distortion to complex-shaped instrument, part.(5) quenching temperature is low, thermal treatment process is simple, energy-saving effect is remarkable.
The present invention utilizes cheap alloying element Mn to cooperate with Si, Al to promote carbide to dissolve, fully dissolve a spot of valuable alloying element, when tempering, increases the quantity of precipitate, and the refinement carbide increases temper resistance.And make in the drawing process a large amount of retained austenites change martensite into, under the acting in conjunction of these factors, produce significant secondary hardening effect.Simultaneously weak carbide element M n and a large amount of non-carbide elements Si, Al add jointly, significantly increase the homogeneity of distribution of carbides, improve hot workability, the increase lumber recovery, thus obtained the cheap rapid steel of excellent performance.
The effect of each element is as follows in the steel of the present invention:
Cr: because Cr belongs to the strong carbide element, form the very high primary carbide M7C of hardness when Cr content increases, improve the wear resistance of steel, existing research theory thinks that the Cr element also has the effect that promotes secondary hardening.
Mn: be the element that improves hardening capacity, and reduce the Ms point, increase the retained austenite amount simultaneously.Because Mn and S have stronger bonding force, can also effectively reduce the harm of S to hot workability, improve the forging rolling performance.Test shows in addition, and Mn also has the effect of the carbide of promotion dissolved.Therefore add an amount of alloying element manganese to reduction carbide solvent temperature, thereby reduce the heating quenching temperature.Weak carbide element M n and relatively large non-carbide elements Si, Al add jointly, make the carbide forming process need arrange these non-carbide elements on the one hand, hinder the formation of bulk carbide, Mn reduces the quantity of primary carbide in addition, so significantly increase the homogeneity of distribution of carbides, improve hot workability, increase lumber recovery and have good effect.
Si: Si plays and suppresses carbide and separate out from austenite in steel, when tempering, increases the quantity of precipitate, and the refinement carbide, therefore significantly improves the secondary hardening level.By increasing the minimizing of Cr amount or avoiding its decarburization susceptibility, increase Mn measures and improves toughness.Because steel of the present invention contains Mn, Si, the Al of more amount simultaneously, after causing quenching more retained austenite is arranged, and can make a large amount of retained austenites change martensite into by suitable tempering process and obtain good age hardening effect.
Al: be strong ferrite former, have the effect that promotes secondary hardening, and have the effect of alternative part W.
RE: the mixing rare earth alloy RE that adds trace can significantly improve toughness and forging property, and the effect of refinement carbide is arranged.
Nb, Ti: the strong carbide forming element, the carbide of formation has the effect of crystal grain thinning.
W, Mo, these elements of V are the elements that mainly produce secondary hardening, cooperate further crystal grain thinning with above-mentioned element, increase quenching hardness and secondary hardening hardness; Thereby improve wear resistance and red hardness.
Production technique correlation parameter of the present invention is as follows: smelting temperature 1550C～1620C, casting ingot-forming; Forging rolling technology: initial forging temperature: 1050C～1100C, final forging temperature are greater than 850C; Annealing process: 830C～860C heats cold with stove; Q-tempering technology: 1050C～1100C oil cooling or air cooling, many tempering of 520C～550C, HRC:63～65,600C red hardness HRC54～58; Bending strength: 2800MPa～3800MPa, impelling strength: 20～35J; The carbide rank: less than 2 grades, the grain fineness number under above-mentioned processing condition: 9～11 grades
Embodiment:
Embodiments of the invention 1:C 0.9, Cr 4.0, Si 1.1, Mn 2.0, W 2.8, Al 1.1, Mo 1.3, V 1.4, RE 0.03, Nb 0.17, all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 2:C 1.4, Cr 7.5, Si 1.78, Mn 1.2, W 2.1, Al 0.6, Mo 0.7, V 0.8, Nb 0.12, all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 3:C 1.05, Cr 5.5, Si 1.60, Mn 1.0, W 2.0, Al 0.8, Mo 0.85, V 0.6, RE 0.01, all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 4:C 0.9, Cr 6.5, Si 1.9, Mn 1.4, W 1.3, Al 0.9, Mo 0.75, V 1.5, Ti 0.1, and all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 5:C 1.2, Cr 6.0, Si 1.65, Mn 1.6, W 2.5, Al 0.7, Mo 0.8, V 0.65, RE 0.03, all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 6:C 1.3, Cr 7.0, Si 1.6, Mn 1.3, W 2.1, Al 0.9, Mo 0.9, V 0.6, RE 0.01, Nb 0.10, all the other are Fe, S in the steel≤0.02, P≤0.03.
Embodiments of the invention 7:C 0.9, Cr 6.0, Si 1.0, Mn 2.2, W 2.3, Al 0.5, Mo 0.5, V 0.4, Nb 0.03, RE 0.006, all the other are Fe.
Embodiments of the invention 8:C 1.5, Cr 8.0, Si 2.0, Mn 0.9, W 3.0, Al 1.2, Mo 1.5, V 0.4, Nb 0.2, RE 0.04, all the other are Fe.
Embodiments of the invention 9:C 0.9, Cr 7.0, Si 1.0, Mn 0.9, W 1.0, Al 0.5, Mo 1.5, V 1.5, all the other are Fe; Also can contain trace element: Nb 0.03, RE 0.006, Ti 0.03 in the steel; S in the steel, P are impurity, and its weight percentage is S≤0.02, P≤0.03.
Embodiments of the invention 10:C 1.5, Cr 8.0, Si 2.0, Mn 2.2, W 1.2, Al 1.2, Mo 1.5, V 0.5, all the other are Fe; Contain trace element: Nb 0.2, RE 0.04, Ti 0.2 in the steel; S in the steel, P are impurity, and its weight percentage is S≤0.02, P≤0.03.
The correlation technique parameter of the production technique that the foregoing description adopts is as follows: smelting temperature 1550C～1620C, casting ingot-forming; Forging rolling technology: initial forging temperature: 1050C～1100C, final forging temperature are greater than 850C; Annealing process: 830C～860C heats cold with stove; Q-tempering technology: 1050C～1100C oil cooling or air cooling, many tempering of 520C～550C, HRC:63～65,600C red hardness HRC54～58; Bending strength: 2800MPa～3800MPa, impelling strength: 20～35J, the carbide rank: less than 2 grades, the grain fineness number under above-mentioned processing condition: 9～11 grades.
Claims (2)
1. rapid steel cheaply, it is characterized in that: it is main addition element with C, Cr, Si, Mn, w, interior a small amount of Mo, V, the AI of adding, according to weight percentage, its chemical ingredients scope is: C0.9～1.5, Cr4.0～8.0, Si1.0～2.0, Mn0.9～2.2, W1.0～3.0, Al0.5～1.2, Mo0.5～1.5, V0.4～1.5, and all the other are Fe; One or more the element that also contains trace in the steel.Its weight percentage is: Nb0.03～0 2, RE0.006～0.04, Ti0.03～0.2.
2. according to the described rapid steel cheaply of claim 1, it is characterized in that: the S in the steel, p are impurity, and its weight percentage is S≤0.02, P≤0.03.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100031138A CN100381599C (en) | 2005-06-22 | 2005-06-22 | Low cost high-speed steel |
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| CNB2005100031138A CN100381599C (en) | 2005-06-22 | 2005-06-22 | Low cost high-speed steel |
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| CN1884607A CN1884607A (en) | 2006-12-27 |
| CN100381599C true CN100381599C (en) | 2008-04-16 |
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| CNB2005100031138A Expired - Fee Related CN100381599C (en) | 2005-06-22 | 2005-06-22 | Low cost high-speed steel |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5672466B2 (en) * | 2011-02-21 | 2015-02-18 | 日立金属株式会社 | Cold work tool steel with excellent machinability |
| CN103014495B (en) * | 2012-12-01 | 2015-07-15 | 滁州市成业机械制造有限公司 | High-tenacity high-wear-resistance cold-work die steel and processing method thereof |
| CN103510021B (en) * | 2013-04-07 | 2016-01-20 | 安徽美芝精密制造有限公司 | Steel Alloy, compressor sliding blade and preparation method thereof |
| CN103643139A (en) * | 2013-11-12 | 2014-03-19 | 铜陵市肆得科技有限责任公司 | Alloy steel material for water pump bearings and preparation method thereof |
| CN103643132A (en) * | 2013-11-12 | 2014-03-19 | 铜陵市肆得科技有限责任公司 | High speed steel material for large-scale pump bearings and preparation method thereof |
| CN103643128A (en) * | 2013-11-12 | 2014-03-19 | 铜陵市肆得科技有限责任公司 | High speed steel material for high temperature pump bearings and preparation method thereof |
| CN104313477B (en) * | 2014-10-10 | 2017-10-13 | 绵阳西诺特矿用设备制造有限公司 | A kind of high abrasion steel and its application |
| CN104789894A (en) * | 2015-04-04 | 2015-07-22 | 王文姣 | Heat treatment method of high-strength automobile bumper and high-strength automobile bumper |
| CN107177800A (en) * | 2017-05-14 | 2017-09-19 | 合肥鼎鑫模具有限公司 | A kind of CNC milling machine milling cutter high-speed tool steel and its manufacture method |
| CN107460411A (en) * | 2017-09-08 | 2017-12-12 | 江苏精工特种材料有限公司 | High silicomanganese high speed steel material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226609A (en) * | 1999-01-26 | 1999-08-25 | 尹道乐 | Economic high speed steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226609A (en) * | 1999-01-26 | 1999-08-25 | 尹道乐 | Economic high speed steel |
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Assignee: East Tool & Die Co., Ltd. Assignor: Guizhou University Contract fulfillment period: 2009.6.15 to 2014.6.14 contract change Contract record no.: 2009330001666 Denomination of invention: Low cost high-speed steel Granted publication date: 20080416 License type: Exclusive license Record date: 2009.7.20 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.15 TO 2014.6.14; CHANGE OF CONTRACT Name of requester: ZHEJIANG YISHENG SPECIAL TOOLS MOULD CO., LTD. Effective date: 20090720 |
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