CN104087874B - A kind of high-speed steel roll and preparation method thereof - Google Patents
A kind of high-speed steel roll and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high-speed steel roll and preparation method thereof, belong to technical field of steel rolling.Particularly, high-speed steel roll of the present invention, 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, and surplus is iron and the inevitable and trace impurity of content below 0.01.High speed steel roll material roll surface macrohardness of the present invention has had qualitative leap, no matter its tensile strength, or its impelling strength, is compared with prior art all greatly improved and improves.
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, also known as rapid tool steel or high-speed steel, is commonly called as Bai Gang.It is a kind of steel alloy of complicated component, containing carbide forming elements such as tungsten, molybdenum, chromium, vanadium, cobalts.Alloying element total amount reaches about 10 ~ 25%.Its under high speed cutting produces high enthusiasm condition (about 500 DEG C) still can keep high hardness, and HRC can 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 higher than 200 DEG C, hardness just sharply declines, the degree similar to as-annealed condition has been dropped to 500 DEG C of hardness, completely lose the ability of cutting metal, which limits carbon tool steel and make cutting tool use.And rapid steel is good due to red hardness, compensate for the fatal defects of carbon tool steel, can be used for manufacturing cutting tool.
The thermal treatment process of rapid steel is comparatively complicated, has to pass through a series of processes such as quenching, tempering.Because its poor thermal conductivity is generally carried out in two stages during quenching.First 800 ~ 850 DEG C of preheatings (in order to avoid causing large thermal stresses), be then heated to rapidly quenching temperature 1190 ~ 1290 DEG C (during the actual use of the different trade mark, temperature is had any different), rear oil cooling or air cooling or inflatable body cool.Factory all adopts salt stove to heat, and existing vacuum oven uses also quite extensive.Be not transformed into martensite because interior tissue also retains a part (about 30%) residual austenite after quenching, have impact on the performance of rapid steel.For making Transformation of Retained Austenite, improving hardness and wear resistance further, generally will carry out 2 ~ 3 tempering, tempering temperature 560 DEG C, each insulation 1 hour.
Application number: 200410024855.4 disclose a kind of method making 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, hot-rolled temperature 950 ~ 1100 DEG C, draught per pass is 50 ~ 80%; Controlled cooling model.
Application number: 200510003113.8 rapid steel disclosing a kind of low cost, it for main addition element, then adds a small amount of Mo, V, Al composition with C, Cr, Si, Mn, W; This product has high-strong toughness, high rigidity, and has high red hardness, and hot workability is excellent, lumber recovery is high, the not easily feature 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.Not containing Co in product of the present invention, and performance level is bordering on and reach containing Co rapid steel.
High-speed steel roll is appearance shortest time, the with fastest developing speed and hot mill work rolls that 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, studies the chemical composition of existing high-speed steel roll, a kind of superhard, high-strong toughness, the high-wearing feature high-speed steel roll of unexpected system.
Particularly, object of the present invention realizes mainly through 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, and surplus is iron and the inevitable and trace impurity of content 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, and surplus is iron and the inevitable and trace impurity of content below 0.01.
High-speed steel roll of the present invention, concrete preparation method, comprises following steps:
1) steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1500-1550 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to about 1580 DEG C, come out of the stove after skimming.
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth being crushed to the fritter that granularity is less than 8mm, drying to constant weight through 120-140 DEG C, be placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel.
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1450-1500 DEG C.
4) roll is cooled to 500-600 DEG C, and insulation 12-24 hour, be then cooled to 150-200 DEG C, 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, is 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, and be preferably gadolinium and cerium, 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) steel scrap, synthetic graphite, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1548 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming.
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth being crushed to the fritter that granularity is less than 8mm, drying to constant weight through 120 DEG C, be placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel.
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1470 DEG C.
4) roll is cooled to 520 DEG C, and be incubated 16 hours, be then cooled to 180 DEG C, 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 expensive alloying elements 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 the need to carrying out heat setting quench treatment, only carry out eliminating stress and the tempering heat treatment of stabilizing tissue, obviously can 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, roll material intensity and toughness are significantly improved, and roll surface macrohardness has had qualitative leap, up to more than 90HSD, no matter its tensile strength, or its impelling strength, be compared with prior art all greatly improved and improve.
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, namely 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 equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within 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) steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1548 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming.
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth (concrete rare earth element is lanthanum) are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 120 DEG C, being placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel.
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1470 DEG C.
4) roll is cooled to 520 DEG C, and be incubated 16 hours, be then cooled to 180 DEG C, 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) steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1548 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming.
2) bismuth iron, telluride copper master alloy, 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, dry to constant weight through 120 DEG C, being placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel.
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1470 DEG C.
4) roll is cooled to 520 DEG C, and be incubated 16 hours, be then cooled to 180 DEG C, 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) steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1540 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming.
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth (concrete rare earth element is cerium) are crushed to the fritter that granularity is less than 8mm, dry to constant weight through 200 DEG C, being placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel.
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1460 DEG C.
4) roll is cooled to 510 DEG C, and be incubated 12 hours, be then cooled to 160 DEG C, 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.Application experiment shows, during high-speed steel roll of the present invention uses 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 (8)
1. a high-speed steel roll, it is characterized in that being made up of following component, its chemical composition represents 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 iron and the inevitable and trace impurity of content below 0.01.
2. a kind of high-speed steel roll as claimed in claim 1, be made up of following component, its chemical composition represents 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 iron and the inevitable and trace impurity of content below 0.01.
3. a kind of high-speed steel roll as claimed in claim 1, is characterized in that its preparation method, comprises following steps:
1) steel scrap, carburelant, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1500-1550 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming;
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth being crushed to the fritter that granularity is less than 8mm, drying to constant weight through 120-140 DEG C, be placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel;
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1450-1500 DEG C;
4) roll is cooled to 500-600 DEG C, insulation 12-24 hour, and be then cooled to 150-200 DEG C, air cooling is to room temperature;
5) precision work.
4. a kind of high-speed steel roll as claimed in claim 3, is characterized in that its preparation methods steps 1) in carburelant be: one or more in the carburetting pig iron, electrode powder, petroleum coke powder, wood charcoal powder or coke powder.
5. a kind of high-speed steel roll as claimed in claim 3, is characterized in that its preparation methods steps 1) in carburelant be synthetic graphite.
6. a kind of high-speed steel roll as claimed in claim 3, is characterized in that its preparation methods steps 2) concrete rare earth element in middle-weight rare earths magnesium alloy is one or more in lanthanum, gadolinium, cerium, neodymium, yttrium.
7. a kind of high-speed steel roll as claimed in claim 6, is characterized in that its preparation methods steps 2) mass ratio of concrete rare-earth element gadolinium in middle-weight rare earths magnesium alloy and cerium is 1:1.
8. a kind of high-speed steel roll as claimed in claim 5, is characterized in that its preparation method, comprises following steps:
1) steel scrap, synthetic graphite, ferrochrome, copper coin, ferrotungsten and molybdenum-iron Hybrid Heating are melted, ferrosilicon is added after molten steel is melting down, when being warming up to 1548 DEG C, add silver and contain nitrogenous ferrochrome, then vanadium iron, ferro-boron and ferrotianium is added successively, after stokehold adjusting component is qualified, liquid steel temperature is risen to 1580 DEG C, come out of the stove after skimming;
2) bismuth iron, telluride copper master alloy, salt of wormwood and magnesium-rare earth being crushed to the fritter that granularity is less than 8mm, drying to constant weight through 120 DEG C, be placed in bottom casting ladle, with pouring method in bag, compound modification treatment being carried out to molten steel;
3) molten steel is poured into roll in casting mold, pouring molten steel temperature 1470 DEG C;
4) roll is cooled to 520 DEG C, and be incubated 16 hours, be then cooled to 180 DEG C, air cooling is to room temperature;
5) precision work.
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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 |
| 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 |
| 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 |
| 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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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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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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. |