CN100500919C - Novel high carbon high tungsten hig speed steel rolling roller - Google Patents
Novel high carbon high tungsten hig speed steel rolling roller Download PDFInfo
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- CN100500919C CN100500919C CNB2006101578226A CN200610157822A CN100500919C CN 100500919 C CN100500919 C CN 100500919C CN B2006101578226 A CNB2006101578226 A CN B2006101578226A CN 200610157822 A CN200610157822 A CN 200610157822A CN 100500919 C CN100500919 C CN 100500919C
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Abstract
The present invention discloses one kind of new high carbon and high tungsten high speed steel roll and its making process, and belongs to the field of high speed steel roll making technology. The high carbon and high tungsten high speed steel roll contains C 2.0-3.0 wt%, W 6.0-18.0 wt%, V 2.0-4.0 wt%, Mo 1.0-3.0 wt%, Cr 3.0-9.0 wt%, Si less than 1.2 wt%, and Mn less than 1.2 wt%, and possesses MC type composite carbide of V and W. The making process of the high carbon and high tungsten high speed steel roll includes heating high carbon and high tungsten high speed steel to 1580-1620 deg.c before deoxidizing, casting at 1400-1500 deg.c and rotary forming while adding stable magnetic field of 0.05-0.25 T to the centrifuging casting mold and rotating the casting mold at 600-1800 rpm speed.
Description
Technical field
The invention belongs to the preparing technical field of high-speed steel roll, particularly a kind of novel high carbon high wolfram fast steel rolling roller and preparation method thereof.
Background technology
In recent years, for the surface quality, the rolling accuracy that improve stocking with reduce cost, develop many new rolling techniques, also promoted to have the exploitation of the high-speed steel roll and preparation method thereof of good red hardness, wear resistance and hardening capacity simultaneously.
The main alloy element of high speed steel roll material is elements such as vanadium, chromium, molybdenum and tungsten, and vanadium can make rapid steel have high-wearing feature as the main forming element of MC type carbide; And in rapid steel, add chromium, and then can increase stabilization of austenite, improve the hardening capacity of rapid steel; Add tungsten and molybdenum and then can cause secondary hardening, have high thermohardening to guarantee rapid steel.
Centrifugal casting prepares roll and compares with continuous casting composite algorithm, esr process (U.S. Pat 5081760, Chinese invention patent CN1157192), the jet deposition method of forming and hot isostatic pressing method (Japanese patent gazette spy opens clear 61-238407) etc., it is few to have facility investment, production cost is low, working method is easy, advantages such as constant product quality.But owing to contain alloying elements such as more tungsten, chromium, molybdenum, vanadium in the rapid steel, the density difference of these alloying elements and wolfram varbide is very big, under common rotary casting condition, the alloying element segregation is serious, shows as the low and tungsten of outer content of vanadium, molybdenum content height, and internal layer is then just in time opposite.Carbide segregation mainly is the segregation of MC type carbide in the centrifugal casting quick-cutting steel roll, more precisely mainly is the segregation of primary crystallization vanadium carbide, and reason is that the density of vanadium carbide and molten steel differs bigger, and this will have a strong impact on the roll wear resistance.
For solving carbide segregation, the special flat high speed steel roll material that 4-365836 has proposed reduced in segregation of carbide respectively of opening of U.S. Pat 6095957 and Japanese patent gazette, mainly be to add the density that the niobium element improves MC type carbide, and the high W elements of density is added in restriction, its result is owing to generate the bigger MC type double carbide (vanadium, niobium are carbide) of density, its density and molten steel density are close, and vanadium carbide is reduced, and have effectively controlled the segregation of centrifugal casting quick-cutting steel roll wolfram varbide.But the interpolation of niobium element has improved the quenching temperature of steel, has but reduced the peak value of secondary hardening simultaneously; The MC type carbide of niobium system is thicker than the MC type carbide grain of vanadium system in the rapid steel casting forming process in addition, causes roll to wear no resistance, and reduces the work-ing life of high-speed steel roll.The rapid steel red hardness that the tungstenic amount is low is poor simultaneously, and hot hardness is low, and high temperature abrasion resistance is poor, reduces the life-span of high-speed steel roll.Chinese patent CN03114582.5 discloses a kind of high carbon high wolfram fast steel rolling composite roll material and manufacture method thereof, its chemical ingredients (weight percent) is: 2.0%～3.2% carbon, 15.0%～22.0% tungsten, 3.0%～10.0% vanadium, 2.0%～8.0% molybdenum, 8.0%～18.0% chromium, 0.2%～1.0% nickel, 0.03%～0.25% yttrium, 0.03%～0.3% potassium,＜1.5% silicon,＜1.5% manganese,＜0.04% sulphur,＜0.04% phosphorus, and applying the method control gravity segregation of induction stirring in the employing process of setting, the roll main performance index of preparation all is better than common high-speed steel roll.But this roll interalloy element whole content especially content of tungsten is higher, easily separates out thick sheet M at crystal boundary
2C carbide and the carbide and the matrix that cause come off, and too high alloy content also can cause the raising of roll cost.Therefore, being developed to suitable high carbon high wolfram fast steel rolling roller of branch and preparation method thereof is a urgent task.
Summary of the invention
At above-mentioned weak point of the prior art, the objective of the invention is to, a kind of novel high carbon high wolfram fast steel rolling roller is provided.
High carbon high wolfram fast steel rolling provided by the present invention is elementary composition by following weight percent: carbon 2.0～3.0%, tungsten 6.0～18.0%, vanadium 2.0～4.0%, molybdenum 1.0～3.0%, chromium 3.0～9.0%, silicon is less than 1.2%, manganese is less than 1.2%, and all the other are ferro element and unavoidable impurities.
High carbon high wolfram fast steel rolling roller provided by the present invention, the weight that can further control institute's tungstenic are 3～4.5 times of weight of contained vanadium.
High carbon high wolfram fast steel rolling roller provided by the present invention, the MC type double carbide in its solidified structure are that vanadium, tungsten are MC type double carbide.
The method of making described high carbon high wolfram fast steel rolling roller is the electromagnetic centrifugal casting method, be primarily characterized in that, described high carbon high wolfram fast steel rolling is melted in induction furnace, deoxidation after temperature reaches 1580 ℃～1620 ℃, casting in the time of 1400 ℃～1500 ℃, when casting, at first apply steady magnetic field in the centrifugal casting mold outside, magneticstrength is 0.05T～0.25T, centrifugal drive systems centrifugal casting mold is rotated with 600-1800 rev/min speed, and the high carbon high wolfram fast steel rolling melt is coagulation forming under the comprehensive action of centrifugal force and electromagnetic force.
The high carbon high wolfram fast steel rolling that the invention has the beneficial effects as follows designed composition is under the centrifugal force and electromagnetic force comprehensive action of certain intensity, make a large amount of tungsten replace vanadium and form MC type double carbide (vanadium, tungsten is carbide), improved the density and hardness of MC type carbide on the one hand, make the segregation of MC type carbide controlled, its performance is far above common high-speed steel roll: the aspect has reduced the addition of expensive v element in addition, also need not add the distribution that a large amount of molybdenums improves primary carbide, the whole alloy Suo Hanliang of unit of roll is the vanadium of high price especially, molybdenum content significantly reduces, having good economic benefits, is a kind of high-speed steel roll of high performance-price ratio of suitable china natural resources situation.
Description of drawings
Fig. 1 is an embodiment of the invention high carbon high wolfram fast steel rolling electromagnetic centrifugal casting principle schematic.
Among the figure: 1, centrifugal drive system; 2, centrifugal casting mold; 3, end cap; 4, high carbon high wolfram fast steel rolling; 5, steady magnetic field producer.
Embodiment
Below in conjunction with accompanying drawing, specify specific embodiments of the present invention.
The high carbon high wolfram fast steel rolling roller of present embodiment adopts the medium-frequency induction furnace fusing, the element that comprises following weight percent: carbon 2.4%, tungsten 15.0%, vanadium 3.5%, molybdenum 2.0%, chromium 6.0%, silicon＜1.2%, manganese＜1.2%, all the other are ferro element and unavoidable impurities, control sulphur＜0.04% in the impurity, phosphorus＜0.04%.
Carbon is in order to obtain the carbide hard phase of some amount, to improve the roll wear resistance, and part carbon dissolves in matrix can also improve hardening capacity; Add-on is too much, and material fragility is big, and heat crack resistance is poor, easily produces casting crack, therefore, its content is controlled to be 2.0～3.0%.Tungsten mainly is present in MC type double carbide and M
2In the C type double carbide, tungsten can improve red hardness and reduce hot supersensitivity, but too high meeting is separated out thick flaky M at crystal boundary
2C type double carbide reduces high-temp plastic, carbide and matrix are come off, so W content is controlled to be 6.0～18%.Vanadium helps the formation of MC type carbide in the rapid steel, promoting layer sheet M
2The formation of C type carbide suppresses M
6The formation of C type carbide.Vanadium forms in the MC type double carbide with part tungsten in this rapid steel, but too high vanadium can make the M that occurs soft in the tissue
3C type carbide, the wear resistance of reduction rapid steel, therefore, content of vanadium is controlled to be 2.0～4.0% in the rapid steel.Molybdenum can improve the ununiformity of primary carbide, reduces fragility; The molybdenum of tempering solid solution can stop carbide to be separated out along crystal boundary, and rapid steel intensity and toughness are improved, but the too high decarburization susceptibility that can increase rapid steel of content, the present invention is controlled to be 1.0～3.0% with the content of molybdenum.Chromium forms in high-speed steel roll can consoluet M under the low Heating temperature
23C
6The type carbide, the hardening capacity and the red hardness of raising rapid steel.Chromium content increases can improve M7C
3Type carbide quantity, the quantity of reduction MC type carbide, so chromium content is controlled to be 3.0～9.0%.Add an amount of silicon and manganese in the high-speed steel roll and have deoxidation and cleaning molten steel effect, but manganese content has the coarsened grain tendency when high, roll used and is prone to be full of cracks when silicon was high, therefore silicon, manganese content was controlled at below 1.2%.
Its manufacturing technology steps of high carbon high wolfram fast steel rolling roller provided by the invention is: at first high carbon high wolfram fast steel rolling is melted in induction furnace, after being warming up to 1580 ℃～1620 ℃, carry out deoxidation treatment, in the time of 1400 ℃～1500 ℃, cast in the die cavity that forms by centrifugal casting mold 2 and end cap 3.Steady magnetic field producer 5 applies steady magnetic field during casting outside centrifugal casting mold 2, its intensity is 0.15T, start centrifugal drive system 1 simultaneously, make centrifugal casting mold 2 with 1200 rev/mins speed high speed rotating, high carbon high wolfram fast steel rolling 4 coagulation forming under the comprehensive action of electromagnetic force and centrifugal force is a high carbon high wolfram fast steel rolling roller.
Through check, prepared high carbon high wolfram fast steel rolling roller dense structure, there are not loose and gas hole defect, column crystal obviously reduces, form a large amount of equiax crystal, the distribution of carbides disperseization, MC type carbide is that vanadium, tungsten are MC type double carbide, wherein the content of tungsten is higher than 60%, and disperse is distributed in the matrix; Prepared high carbon high wolfram fast steel rolling roller has excellent comprehensive performances.
Claims (3)
1, a kind of high carbon high wolfram fast steel rolling roller, make by high carbon high wolfram fast steel rolling, it is characterized in that described high carbon high wolfram fast steel rolling elementary composition by following weight percent: carbon 2.0～3.0%, tungsten 6.0～18.0%, vanadium 2.0～4.0%, molybdenum 1.0～3.0%, chromium 3.0～9.0%, silicon is less than 1.2%, and manganese is less than 1.2%, and all the other are ferro element and unavoidable impurities.
2, high carbon high wolfram fast steel rolling roller according to claim 1, the weight that it is characterized in that institute's tungstenic in the described high carbon high wolfram fast steel rolling are 3～4.5 times of weight of contained vanadium.
3, high carbon high wolfram fast steel rolling roller according to claim 1 and 2 is characterized in that containing in the described high carbon high wolfram fast steel rolling tissue MC type double carbide, and described MC type double carbide is that vanadium, tungsten are MC type double carbide.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101578226A CN100500919C (en) | 2006-12-21 | 2006-12-21 | Novel high carbon high tungsten hig speed steel rolling roller |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101578226A CN100500919C (en) | 2006-12-21 | 2006-12-21 | Novel high carbon high tungsten hig speed steel rolling roller |
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| CN100999804A CN100999804A (en) | 2007-07-18 |
| CN100500919C true CN100500919C (en) | 2009-06-17 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105821295A (en) * | 2016-04-22 | 2016-08-03 | 柳州凯通新材料科技有限公司 | Chromium, manganese, silicon and vanadium wear-resistant cast iron and processing technology thereof |
| CN105671423A (en) * | 2016-04-22 | 2016-06-15 | 柳州凯通新材料科技有限公司 | Chromium-manganese-silicon-vanadium antifriction cast iron and preparation method thereof |
| FR3073163B1 (en) * | 2017-11-07 | 2022-07-15 | Safran Aircraft Engines | DEVICE AND METHOD FOR MANUFACTURING A METAL ALLOY BLIND BY CENTRIFUGAL CASTING |
| CN110000362B (en) * | 2019-04-10 | 2021-01-01 | 安徽环渤湾高速钢轧辊有限公司 | High-tungsten-vanadium high-speed steel wear-resistant roller and manufacturing method thereof |
| CN112371979A (en) * | 2020-10-29 | 2021-02-19 | 宜兴市和昌轧辊有限公司 | Method for preparing superfine crystal grain spray-formed high-speed steel roller |
| CN112795838B (en) * | 2020-12-04 | 2022-11-15 | 中钢集团邢台机械轧辊有限公司 | High-speed steel roll collar of profile steel rail beam universal mill and preparation method thereof |
| CN113511392B (en) * | 2021-09-13 | 2021-11-12 | 江苏润度生物科技有限公司 | Cultivate automatic baling equipment of waste material contactless |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264749A (en) * | 2000-03-24 | 2000-08-30 | 冶金工业部钢铁研究总院 | High-speed antiwear cast steel |
| CN1439472A (en) * | 2003-03-28 | 2003-09-03 | 西安交通大学 | Centrifugal cast high-speed steel roll manufacture |
| CN1559726A (en) * | 2004-02-19 | 2005-01-05 | 清华大学 | Method of electromagnet continuoces casting of high spped steel composite roller |
| CN1559725A (en) * | 2004-02-19 | 2005-01-05 | 清华大学 | Method producing high speed steet composite roller by electromagnetic centrifugal casting |
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2006
- 2006-12-21 CN CNB2006101578226A patent/CN100500919C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264749A (en) * | 2000-03-24 | 2000-08-30 | 冶金工业部钢铁研究总院 | High-speed antiwear cast steel |
| CN1439472A (en) * | 2003-03-28 | 2003-09-03 | 西安交通大学 | Centrifugal cast high-speed steel roll manufacture |
| CN1559726A (en) * | 2004-02-19 | 2005-01-05 | 清华大学 | Method of electromagnet continuoces casting of high spped steel composite roller |
| CN1559725A (en) * | 2004-02-19 | 2005-01-05 | 清华大学 | Method producing high speed steet composite roller by electromagnetic centrifugal casting |
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