CN104087874A - High-speed steel roll and preparation method thereof - Google Patents
High-speed steel roll and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-speed steel roll and a preparation method thereof, belonging to the technical field of steel rolling. Particularly, the high-speed steel roll comprises the following chemical compositions in percentage by mass: 2.00-3.20% of tungsten, 2.00-3.00% of chromium, 1.00-1.20% of carbon, 0.60-1.00% of silicon, 0.50-0.80% of molybdenum, 0.20-0.60% of vanadium, 0.20-0.60% of boron, 0.20-0.60% of silver, 0.05-0.10% of nitrogen, 0.20-0.60% of copper, 0.08-0.16% of rare earth, 0.04-0.10% of magnesium, 0.04-0.10% of titanium, 0.10-0.20% of potassium, 0.08-0.16% of sodium, 0.02-0.04% of tellurium, 0.02-0.04% of bismuth, and the balance of iron and inevitable trace impurities of which the content is less than 0.01%. According to the high-speed steel roll material disclosed by the invention, the macro-hardness of the roll surface has a qualitative leap; compared with the prior art, the high-speed steel roll material has the advantage that the tensile strength and impact toughness are greatly increased and improved.
Description
Technical field
The invention belongs to technical field of steel rolling, be specifically related to a kind of high-speed steel roll and preparation method thereof.
Background technology
Rapid steel is a kind of tool steel with high rigidity, high-wearing feature and high heat resistance, claims again rapid tool steel or high-speed steel, is commonly called as Bai Gang.It is a kind of steel alloy of complicated component, contains the carbide forming elements such as tungsten, molybdenum, chromium, vanadium, cobalt.Alloying element total amount reaches 10～25% left and right.It produces (approximately 500 ℃) under high enthusiasm condition in high speed cutting still can keep high hardness, and HRC can be more than 60.The topmost characteristic of rapid steel---red hardness that Here it is.And carbon tool steel is after quenching and low-temperaturetempering, though at room temperature there is very high hardness, but when temperature is during higher than 200 ℃, hardness just sharply declines, 500 ℃ of hardness, dropped to the degree similar to as-annealed condition, completely lost the ability of cutting metal, this has just limited carbon tool steel and has made cutting tool use.And rapid steel is because red hardness is good, made up the fatal shortcoming of carbon tool steel, can be used for manufacturing cutting tool.
The thermal treatment process of rapid steel is comparatively complicated, must be through a series of processes such as quenching, tempering.Poor thermal conductivity due to it during quenching is generally carried out in two stages.First, 800～850 ℃ of preheatings (in order to avoid causing large thermal stresses), be then heated to rapidly 1190～1290 ℃ of quenching temperatures (during the actual use of the different trades mark, temperature is had any different), rear oil cooling or air cooling or inflatable body are cooling.Factory all adopts the heating of salt stove, and existing vacuum oven is used also quite extensive.After quenching, because interior tissue also retains a part (approximately 30%) residual austenite, be not transformed into martensite, affected the performance of rapid steel.For making Transformation of Retained Austenite, further improve hardness and wear resistance, generally to carry out 2～3 tempering, 560 ℃ of tempering temperatures are incubated 1 hour at every turn.
Application number: 200410024855.4 disclose a kind of method that makes high-vanadium, high-cobalt high speed steel obtain superplasticity property: select mother alloy material, adopt spray deposition processing, obtain high-vanadium, high-cobalt high speed steel block; Heavy reduction hot rolling again, 950～1100 ℃ of hot-rolled temperatures, draught per pass is 50～80%; Control cooling.
Application number: 200510003113.8 disclose a kind of rapid steel cheaply, it take C, Cr, Si, Mn, W is main addition element, then add a small amount of Mo, V, Al forms; This product has high-strong toughness, high rigidity, and has high red hardness, and hot workability is excellent, lumber recovery is high, be difficult for the features such as hardening break.
Application number: 200510009673.4 disclose a kind of super hard no-Co high speed steel, and its weight ratio consists of: the iron of carbon 1.00-1.20, tungsten 6.50-7.50, molybdenum 3.50-5.00, chromium 3.50-4.50, vanadium 1.60-2.20, silicon 0.60-1.20, manganese 0.20-0.60, nitrogen 0.04-0.10 and surplus.In product of the present invention, do not contain Co, and performance level is bordering on and reach the rapid steel containing Co.
The hot roll material that high-speed steel roll is appearance shortest time, with fastest developing speed and application prospect is the widest.
Summary of the invention
The object of this invention is to provide a kind of superhard, high-strong toughness, high-wearing feature high-speed steel roll and preparation method thereof.
The present invention is on the basis of existing technology, and the chemical composition of existing high-speed steel roll is studied, unexpected system a kind of superhard, high-strong toughness, high-wearing feature high-speed steel roll.
Particularly, object of the present invention mainly realizes by following measures:
A kind of high-speed steel roll, its chemical composition is expressed as with mass percent: tungsten 2.00-3.20, chromium 3.00-2.00, carbon 1.00-1.20, silicon 0.60-1.00, molybdenum 0.50-0. 80, vanadium 0.20-0.60, boron 0.20-0.60, silver-colored 0.20-0.60, nitrogen 0.05-0.10, copper 0.20-0.60, rare earth 0.08-0.16, magnesium 0.04-0.10, titanium 0.04-0.10, potassium 0.10-0.20, sodium 0.08-0.16, tellurium 0.02-0.04, bismuth 0.02-0.04, surplus is that iron and inevitable and content are at the trace impurity below 0.01.
As preferably, high-speed steel roll of the present invention, its chemical composition is expressed as with mass percent: tungsten 3.00, chromium 2.80, carbon 1.10, silicon 0.80, molybdenum 0.65, vanadium 0.48, boron 0.36, silver 0.42, nitrogen 0.07, copper 0.32, rare earth 0.12, magnesium 0.05, titanium 0.06, potassium 0.12, sodium 0.10, tellurium 0.02, bismuth 0.03, surplus is that iron and inevitable and content are at the trace impurity below 0.01.
High-speed steel roll of the present invention, concrete preparation method, comprises following steps:
1) by steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1500-1550 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃ of left and right, after skimming, come out of the stove.
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 120-140 ℃, be placed in casting ladle bottom, with pouring method in wrapping, molten steel is carried out to composite inoculating processing.
3) molten steel is poured in casting mold to roll, pouring molten steel temperature 1450-1500 ℃.
4) roll is cooled to 500-600 ℃, and insulation 12-24 hour, is then cooled to 150-200 ℃, and air cooling is to room temperature.
5) precision work.
Wherein
Carburelant described in step 1 is: one or more in the carburetting pig iron, electrode powder, petroleum coke powder, wood charcoal powder and coke powder, are preferably synthetic graphite.
Concrete rare earth element in magnesium-rare earth described in step 2 is one or more in lanthanum, gadolinium, cerium, neodymium, yttrium, is preferably gadolinium and cerium, and wherein the mass ratio of gadolinium and cerium is 1:1.
Preferably, high-speed steel roll of the present invention, concrete preparation method, comprises following steps:
1) by steel scrap, synthetic graphite, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1548 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃, after skimming, come out of the stove.
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 120 ℃, be placed in casting ladle bottom, with pouring method in wrapping, molten steel is carried out to composite inoculating processing.
3) molten steel is poured in casting mold to roll, 1470 ℃ of pouring molten steel temperature.
4) roll is cooled to 520 ℃, is incubated 16 hours, is then cooled to 180 ℃, and air cooling is to room temperature.
5) precision work.
The present invention compared with prior art, has the following advantages:
1) in high speed steel roll material of the present invention, the add-on of precious alloy element is few, and cost obviously declines.
2) high speed steel roll material of the present invention is by the adjustment to various element percentage, unexpected discovery, material of the present invention is without carrying out high warm hardening quench treatment, only eliminate stress and the tempering heat treatment of stabilizing tissue, can obviously reduce roll thermal treatment energy consumption and shorten the roll production cycle.
3) high speed steel roll material of the present invention is by the adjustment to various element percentage, unexpected discovery, under percentage composition proportioning of the present invention, the raising of sodium potassium content, obviously improves roll material intensity and toughness, and roll surface macrohardness has had qualitative leap, more than 90HSD, no matter its tensile strength, or its impelling strength, is compared with prior art all greatly improved and improves.
Embodiment
The present invention is existing illustrates detailed process equipment and process flow process of the present invention by embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
embodiment 1
With 750 kilograms of medium-frequency induction furnace melting high speed steel roll materials of the present invention, concrete step of preparation process is as follows:
1) by steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1548 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃, after skimming, come out of the stove.
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth (concrete rare earth element is lanthanum) are crushed to the fritter that granularity is less than 8mm, through 120 ℃, dry to constant weight, be placed in casting ladle bottom, with pouring method in bag, molten steel carried out to composite inoculating processing.
3) molten steel is poured in casting mold to roll, 1470 ℃ of pouring molten steel temperature.
4) roll is cooled to 520 ℃, is incubated 16 hours, is then cooled to 180 ℃, and air cooling is to room temperature.
5) precision work.
The chemical composition of roll material is in Table 1
embodiment 2
With 500 kilograms of medium-frequency induction furnace melting high speed steel roll materials of the present invention, concrete step of preparation process is as follows:
1) by steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1548 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃, after skimming, come out of the stove.
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth (concrete rare earth element is gadolinium and cerium) are crushed to the fritter that granularity is less than 8mm, through 120 ℃, dry to constant weight, be placed in casting ladle bottom, with pouring method in bag, molten steel carried out to composite inoculating processing.
3) molten steel is poured in casting mold to roll, 1470 ℃ of pouring molten steel temperature.
4) roll is cooled to 520 ℃, is incubated 16 hours, is then cooled to 180 ℃, and air cooling is to room temperature.
5) precision work.
The chemical composition of roll material is in Table 1
embodiment 3
With 1000 kilograms of medium-frequency induction furnace melting high speed steel roll materials of the present invention, concrete step of preparation process is as follows:
1) by steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1540 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃, after skimming, come out of the stove.
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth (concrete rare earth element is cerium) are crushed to the fritter that granularity is less than 8mm, through 200 ℃, dry to constant weight, be placed in casting ladle bottom, with pouring method in bag, molten steel carried out to composite inoculating processing.
3) molten steel is poured in casting mold to roll, 1460 ℃ of pouring molten steel temperature.
4) roll is cooled to 510 ℃, is incubated 12 hours, is then cooled to 160 ℃, and air cooling is to room temperature.
5) precision work.
The chemical composition of roll material is in Table 1
Table 1 high speed steel roll material composition of the present invention
High-speed steel roll performance of the present invention is in Table 2
Table 2 high-speed steel roll performance of the present invention
At present, high-speed steel roll of the present invention can be used for, on the working roll of cold-rolling stainless steel, die steel and tool steel, having long service life, and stocking surface quality is good etc.Application experiment shows, during high-speed steel roll of the present invention is used without ftractureing, peel off, roll breakage phenomenon.In addition, high-speed steel roll roll neck of the present invention and the body of roll adopt same material cast form, convenient recycling, energy-conserving and environment-protective.
Claims (9)
1. a high-speed steel roll, it is characterized in that this high-speed steel roll, by following component, form (its chemical composition is expressed as with mass percent): tungsten 2.00-3.20, chromium 3.00-2.00, carbon 1.00-1.20, silicon 0.60-1.00, molybdenum 0.50-0. 80, vanadium 0.20-0.60, boron 0.20-0.60, silver 0.20-0.60, nitrogen 0.05-0.10, copper 0.20-0.60, rare earth 0.08-0.16, magnesium 0.04-0.10, titanium 0.04-0.10, potassium 0.10-0.20, sodium 0.08-0.16, tellurium 0.02-0.04, bismuth 0.02-0.04, surplus is that iron and inevitable and content are at the trace impurity below 0.01.
2. a kind of high-speed steel roll as claimed in claim 1, as preferably, by following component, form (its chemical composition is expressed as with mass percent): tungsten 3.00, chromium 2.80, carbon 1.10, silicon 0.80, molybdenum 0.65, vanadium 0.48, boron 0.36, silver 0.42, nitrogen 0.07, copper 0.32, rare earth 0.12, magnesium 0.05, titanium 0.06, potassium 0.12, sodium 0.10, tellurium 0.02, bismuth 0.03, surplus is that iron and inevitable and content are at the trace impurity below 0.01.
3. a high-speed steel roll, is characterized in that its preparation method, comprises following steps:
1) by steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1500-1550 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃ of left and right, after skimming, come out of the stove;
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 120-140 ℃, be placed in casting ladle bottom, with pouring method in wrapping, molten steel is carried out to composite inoculating processing;
3) molten steel is poured in casting mold to roll, pouring molten steel temperature 1450-1500 ℃;
4) roll is cooled to 500-600 ℃, and insulation 12-24 hour, is then cooled to 150-200 ℃, and air cooling is to room temperature;
5) precision work.
4. carburelant as claimed in claim 3 is: one or more in the carburetting pig iron, electrode powder, petroleum coke powder, wood charcoal powder or coke powder.
5. carburelant as claimed in claim 3 is preferably synthetic graphite.
6. the concrete rare earth element in magnesium-rare earth as claimed in claim 3 is one or more in lanthanum, gadolinium, cerium, neodymium, yttrium.
7. the concrete rare earth element in magnesium-rare earth as claimed in claim 3 is preferably gadolinium and cerium.
8. the mass ratio of the concrete rare-earth element gadolinium in magnesium-rare earth as claimed in claim 7 and cerium is 1:1.
9. a kind of high-speed steel roll as claimed in claim 3, is characterized in that its preparation method, preferably, comprises following steps:
1) by steel scrap, synthetic graphite, ferrochrome, copper coin, ferrotungsten and the fusing of molybdenum-iron Hybrid Heating, molten steel adds ferrosilicon after melting clearly, while being warming up to 1548 ℃, add silver and contain nitrogenous ferrochrome, then add successively vanadium iron, ferro-boron and ferrotianium, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 ℃, after skimming, come out of the stove;
2) bismuth iron, tellurium copper master alloy, salt of wormwood, salt of wormwood and magnesium-rare earth are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 120 ℃, be placed in casting ladle bottom, with pouring method in wrapping, molten steel is carried out to composite inoculating processing;
3) molten steel is poured in casting mold to roll, 1470 ℃ of pouring molten steel temperature;
4) roll is cooled to 520 ℃, is incubated 16 hours, is then cooled to 180 ℃, and air cooling is to room temperature;
5) precision work.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104372233A (en) * | 2014-11-03 | 2015-02-25 | 无锡贺邦金属制品有限公司 | Potassium-sodium alloy die castings |
| CN104564469A (en) * | 2014-12-25 | 2015-04-29 | 余姚市舒春机械有限公司 | Needle valve mating part of diesel |
| CN105648325A (en) * | 2016-01-13 | 2016-06-08 | 铜陵百荣新型材料铸件有限公司 | High-tenacity high-speed steel and production technique thereof |
| CN106222579A (en) * | 2016-08-19 | 2016-12-14 | 合肥东方节能科技股份有限公司 | A kind of high speed wire rod finishing block Roll Collar and preparation method thereof |
| CN107217196A (en) * | 2017-05-27 | 2017-09-29 | 太仓明仕金属制造有限公司 | A kind of high rigidity sheet metal component |
| CN107217208A (en) * | 2017-05-27 | 2017-09-29 | 太仓明仕金属制造有限公司 | A kind of multi-functional sheet metal component |
| CN115319059A (en) * | 2022-08-30 | 2022-11-11 | 枣庄瑞兴机械制造有限公司 | Wear-resistant narrow-band steel roller and preparation method thereof |
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| CN101624680A (en) * | 2009-08-14 | 2010-01-13 | 北京工业大学 | Material of intermediate layer for centrifugally casting boracic high-speed steel composite rolls |
| CN102409267A (en) * | 2011-11-14 | 2012-04-11 | 北京工业大学 | Boron-containing high-speed steel roller and preparation method thereof |
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| CN101624680A (en) * | 2009-08-14 | 2010-01-13 | 北京工业大学 | Material of intermediate layer for centrifugally casting boracic high-speed steel composite rolls |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372233A (en) * | 2014-11-03 | 2015-02-25 | 无锡贺邦金属制品有限公司 | Potassium-sodium alloy die castings |
| CN104564469A (en) * | 2014-12-25 | 2015-04-29 | 余姚市舒春机械有限公司 | Needle valve mating part of diesel |
| CN105648325A (en) * | 2016-01-13 | 2016-06-08 | 铜陵百荣新型材料铸件有限公司 | High-tenacity high-speed steel and production technique thereof |
| CN106222579A (en) * | 2016-08-19 | 2016-12-14 | 合肥东方节能科技股份有限公司 | A kind of high speed wire rod finishing block Roll Collar and preparation method thereof |
| CN107217196A (en) * | 2017-05-27 | 2017-09-29 | 太仓明仕金属制造有限公司 | A kind of high rigidity sheet metal component |
| CN107217208A (en) * | 2017-05-27 | 2017-09-29 | 太仓明仕金属制造有限公司 | A kind of multi-functional sheet metal component |
| CN115319059A (en) * | 2022-08-30 | 2022-11-11 | 枣庄瑞兴机械制造有限公司 | Wear-resistant narrow-band steel roller and preparation method thereof |
| CN115319059B (en) * | 2022-08-30 | 2023-07-28 | 枣庄瑞兴机械制造有限公司 | Wear-resistant narrow strip steel roller and preparation method thereof |
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Effective date of registration: 20170405 Address after: 276017 Rossi, Linyi high tech Zone, the streets of the west side of the ditch cliff village in the west of Shandong Patentee after: Shandong Jinggong Precision Co., Ltd. Address before: 276017 advanced equipment manufacturing park, Linyi hi tech Zone, Shandong, China Patentee before: LINYI GEELING PRECISION MACHINERY MANUFACTURING CO., LTD. |