CN100419112C - High performance hot work mould steel - Google Patents
High performance hot work mould steel Download PDFInfo
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- CN100419112C CN100419112C CNB2006100950141A CN200610095014A CN100419112C CN 100419112 C CN100419112 C CN 100419112C CN B2006100950141 A CNB2006100950141 A CN B2006100950141A CN 200610095014 A CN200610095014 A CN 200610095014A CN 100419112 C CN100419112 C CN 100419112C
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Abstract
This high performance hot-work die steel accounting for weight has following chemical composition: C: 0.70-1.98,Si:0.30-1.50,Mn:0.20-0.70,Cr:0.80-2.00,W:0.80- 1.40,Mo:1.00-1.80,Ni:1.00-3.00,V:0.30-1.20,Bi:0.01-0.02,rare earth Si and Mg:0.05-0.08,P<0.03,S<0.03, the rest is Fe and inevitable impurity. The HRC hardness of it can be adjust by need from 20-60 degree, through the way of heat treatment such as annealing and quenching. The invention has enough mechanical strength and toughness, super ordinary thermal oxidation resistance and cold-heat impact resistance, heat resistance, wear resistance, and aluminium liquid resistance. After process into die, not need surface treatment of 'nitriding', just need quenching and tempering for needed hardness.
Description
Technical field
The present invention relates to a kind of hot-work die steel, the high performance hot-work die steel of particularly a kind of suitable for making aluminium hot extruding die and aluminum alloy melt hot pressing mold and steel hot-forging die.
Background technology
In modern industry is produced, particularly manufacturing the aluminum alloy heat extruded material, a large amount of particular manufacturing crafts and alloy steel material must be used and consume to the aluminum alloy heat diecast parts of automobile, motorcycle in the scale operation of hot-die forged steel part etc., all.At present, these moulds all are to select for use fine alloy steel material such as die steel such as 4Cr5MoSiV (being commonly referred to " H13 steel ") and 3Cr2W8V to make.Operations such as they generally all will forge by steel billet, annealing, mechanical workout moulding, quenching, tempering, precision work, " nitrogenize " surface hardening thermal treatment just can put into production use then.The hot extruding die that uses in producing as architectural aluminum section is in the production use, behind 2 tons of left and right sides aluminium section bars of last machine extruding, " nitrogenize " of its mold work belt surface layer has been worn, and just mould must be removed " nitrogenize " processing once more after the refine, could continue to use on the machine.Generally speaking, the aluminium extrusion mould repeats " nitrogenize " at most four to five times, 10 tons of left and right sides aluminiums of accumulative total extrusion production, and the mold cavity wall attenuation changes its work zone size, and the aluminium thickness of extruding becomes big and exceeds standard, and at this moment mould must have been scrapped.So to consume a large amount of moulds and steel every year.
In the hot-die forging of steel is produced, H13 steel at present commonly used or 3Cr2W8V steel are made hot forged mould, and generally after forging tens parts continuously, die temperature will be elevated to more than 200～500 ℃ this hot-forging die, just can not forge again, must remove slowly and could exercise usefulness again after the cooling.In the process of cooling, can not because cool off too suddenly too soon, be easy to make mould to crack and scrap with the quick cooling die of method of water spray.Simultaneously, after this hot forged mould had generally forged a hundreds of part, the die cavity internal surface can produce " be full of cracks ", if continue to use, this fine cracks will soon become big and can not use again.Though the die cavity after the be full of cracks can remove by milling deeply, mills and makes swaging die more and more thinner deeply, scraps at last and can not use.
Summary of the invention
For solving the problems of the technologies described above, high performance hot-work die steel provided by the invention comprises following content chemical ingredients by weight percentage:
C:0.70～1.98, Si:0.30～1.50, Mn:0.20～0.70, Cr:0.80～2.00, W:0.80～1.40, Mo:1.00～1.80, Ni:1.00～3.00, V:0.30～1.20, Bi:0.01～0.02, rare earth silicon and magnesium: 0.05～0.08, P＜0.03, S＜0.03, surplus are Fe and inevitable trace impurity.
Why the present invention adopts technique scheme, be based on following some consideration: after the high C content in (1) steel alloy generates spheroidization of graphite, have excellent having strong resistance to heat and hard wearing property and aluminium liquid resistant performance, special suitable for making aluminium hot extruding die and aluminum alloy melt hot pressing mold.(2) the Si element can impel the C greying in the steel alloy, but its dosage should be suitable, too much can reduce the mechanical property of steel alloy, generally should be controlled at below 1.50%.(3) pearlitic structure of Mn element in can the stable alloy steel can improve intensity, hardness and the wear resistance of steel alloy, but as allocate the fragility that too much can increase steel into, generally should be controlled at below 0.80% and be advisable.(4) Cr, Ni element can improve the heat resistanceheat resistant intensity of steel alloy, make it good oxidation-resistance and hot toughness.(5) M0, W can increase the heat resistanceheat resistant intensity and the thermohardening of steel alloy.(6) V element can strengthen the plasticity of steel alloy, hot toughness and thermotolerance.(7) the Bi element can be facilitated the generation of perlite and ledeburite, reduces martensitic generation, improves the fragility of steel alloy.The Bi element belongs to alterant, can only allocate (0.01-0.02%) into by trace.(8) rare earth silicon and magnesium can impel the graphite body nodularization, helps improving the intensity and the plasticity of steel alloy, reduces fragility.Rare earth silicon and magnesium also belongs to alterant, can only allocate (0.05～0.08%) into by trace.(9) P, S are the harmful elements in the steel alloy, and content too much can damage every performance of material, so should be controlled at below 0.030%.
Compare with the die steel in existing the production, die steel of the present invention has enough physical strengths and toughness, have more the performance of good resistance to thermooxidation and thermal shock and having strong resistance to heat and hard wearing property and aluminium liquid resistant, its HRC hardness value can adopt thermal treatment process such as annealing or quenching to adjust in 20～60 degree scopes as required.For example, before mechanical workout, can adopt annealing process the HRC hardness of material regulation and control in 20～35 degree scopes, be machined to the accurate dimension of mould after, adopt quenching technology that its HRC hardness is pulled back to 40～60 degree for use again.And, utilize mould that die steel of the present invention makes after adopting general cabinet-type electric furnace heating quenching to handle, die-face can oxidation and distortion, does not handle as " nitrogenize " surface heat yet, just can directly put into production use.And, in the production use, after only conventional " the resting " of need work sets up, can continue to come into operation repeatedly.Need not make surface heats such as " nitrogenize " handles.
Utilize hot-forging die that the present invention makes in the production use, when die temperature rises when higher, the quick cooling die of can in time spraying water, thereby can make hot-forging die remain on work under the lesser temps state, help greatly enhancing productivity and increase work-ing life of die steel, thousands of above parts of forge hot can " not chap " yet.
Because die steel of the present invention has the very excellent performance of having strong resistance to heat and hard wearing, and is better than widely used at present " H13 steel ", thus the die life of its processing and fabricating is prolonged greatly, thus greatly reduce the consumption and the various expense of mould.
Below specific embodiments of the invention are described in further detail.For the person of ordinary skill in the field, from detailed description of the invention, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.
Embodiment
Embodiment 1:
In one embodiment of the invention, high performance hot-work die steel of the present invention comprises following content chemical ingredients by weight percentage:
C:0.70～1.00, Si:0.40～1.10, Mn:0.50～0.70, Cr:0.80～1.20, W:0.80～1.00, Mo:1.00～1.30, Ni:1.10～1.80, V:0.40～0.60, Bi:0.01～0.02, rare earth silicon and magnesium: 0.05～0.08, P＜0.03, S＜0.03, surplus are Fe and inevitable trace impurity.
Embodiment 2:
In another embodiment of the present invention, high performance hot-work die steel of the present invention comprises following content chemical ingredients by weight percentage:
C:1.20～1.60, Si:0.50～0.80, Mn:0.40～0.60, Cr:1.00～1.40, W:0.90～1.20, Mo:1.10～1.40, Ni:1.50～2.50, V:0.50～0.80, Bi:0.01～0.02, rare earth silicon and magnesium: 0.05～0.07, P＜0.03, S＜0.03, surplus are Fe and inevitable trace impurity.
Embodiment 3:
In yet another embodiment of the present invention, high performance hot-work die steel of the present invention comprises that following content connects the chemical ingredients of weight percent meter:
C:1.60～1.80, Si:0.70～1.20, Mn:0.30～0.50, Cr:1.50～1.80, W:1.10～1.30, Mo:1.20～1.50, Ni:1.60～2.80, V:0.70～1.00, Bi:0.01～0.02, rare earth silicon and magnesium: 0.05～0.07, P＜0.03, S＜0.03, surplus are Fe and inevitable trace impurity.
Embodiment 4:
In another embodiment of the present invention, high performance hot-work die steel of the present invention comprises following content chemical ingredients by weight percentage:
C:1.70～1.98, Si:1.10～1.50, Mn:0.20～0.40, Cr:1.60～2.00, W:1.20～1.40, Mo:1.30～1.80, Ni:2.00～3.00, V:0.90～1.20, Bi:0.01～0.02, rare earth silicon and magnesium: 0.07～0.08, P＜0.03, S＜0.03, surplus are Fe and inevitable trace impurity.
In the following example of the present invention, high performance hot-work die steel of the present invention can also comprise following content chemical ingredients by weight percentage:
The hot-forging die that the die steel that provides according to the above embodiment of the present invention is made has good cold-and-heat resistent impact property, can spray water cooling fast repeatedly and can not crack in 200-400 ℃ of scope.Therefore, utilize hot-forging die that the present invention makes in the production use, when die temperature rises when higher the quick cooling die of can in time spraying water, thereby can make the hot-forging die work of remaining under the lesser temps state, help greatly enhancing productivity and increase work-ing life of mould.
In the extrusion production of for example architectural aluminum section, the overflow mould that the die steel that adopts the above embodiment of the present invention to provide is made is through quenching, after the tempering heat treatment, do not need " nitrogenize " to handle, directly use on the machine, go up machine continuously five times, the complete qualified aluminium section bar of extrusion production is more than 10 tons, and the mold work belt surface has only mild wear, but and unaffected also can the continuation use.
The transfer mold that the die steel that adopts the above embodiment of the present invention to provide is made is being used for the big production of aluminum alloy die casting, also can obtain and the same effect of the above-mentioned overflow mould of making.
The production method of die steel of the present invention is the same with die steel production commonly used with equipment, can adopt common intermediate frequency furnace to melt out the steel alloy electrode bar of the part that is made into, be refined into required ingot blank through electroslag furnace again, made mould but carry out mechanical workout with regard to blanking after the anneal.
More than describe embodiments of the present invention in detail, but this example of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally; any person of ordinary skill in the field all can be according to the description of technical scheme of the present invention and preferred embodiment thereof; make various possible being equal to and change or replacement, but all these changes or replacement all should belong to the protection domain of claim of the present invention.
Claims (1)
1. hot-work die steel comprises following content chemical ingredients by weight percentage:
C:0.70～1.98%, Si:0.30～1.50%, Mn:0.20～0.70%, Cr:0.80～2.00%, W:0.80～1.40%, Mo:1.00～1.80%, Ni:1.00～3.00%, V:0.30～1.20%, Bi:0.01～0.02%, rare earth silicon and magnesium: 0.05～0.08%, P＜0.03%, S＜0.03%, surplus are Fe and trace impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100950141A CN100419112C (en) | 2006-08-07 | 2006-08-07 | High performance hot work mould steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100950141A CN100419112C (en) | 2006-08-07 | 2006-08-07 | High performance hot work mould steel |
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| CN1904122A CN1904122A (en) | 2007-01-31 |
| CN100419112C true CN100419112C (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100950141A Expired - Fee Related CN100419112C (en) | 2006-08-07 | 2006-08-07 | High performance hot work mould steel |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798657A (en) * | 2010-04-01 | 2010-08-11 | 戚正风 | Micro-alloy chemical die steel and thermal treatment method thereof |
| CN102776450B (en) * | 2011-05-10 | 2013-09-04 | 中国科学院金属研究所 | Quenching heat treatment process for hot work die steel with low heat resistance |
| CN105671444B (en) * | 2016-03-30 | 2017-10-31 | 湖北上大模具材料科技股份有限公司 | A kind of Austenitic Hot Work Die Steel and its Technology for Heating Processing |
| CN107523758A (en) * | 2017-06-30 | 2017-12-29 | 太仓旺美模具有限公司 | A kind of high abrasion hot die steel |
| CN109852776B (en) * | 2018-12-26 | 2020-09-29 | 天津理工大学 | Fe-C alloy material with ultrahigh carbon content and heat treatment process thereof |
| CN112095042A (en) * | 2020-09-12 | 2020-12-18 | 天鑫精工科技(威海)有限公司 | High-toughness hot-work die steel material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100822A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Hot-work die steel |
| CN86101666A (en) * | 1986-03-29 | 1987-10-21 | 冶金工业部钢铁研究总院 | High performance hot-work die steel |
| US5207843A (en) * | 1991-07-31 | 1993-05-04 | Latrobe Steel Company | Chromium hot work steel |
| CN1090605A (en) * | 1993-02-01 | 1994-08-10 | 罗明科 | Alloy cast iron material for water cooling foundry hot swaging mould |
| US20020182099A1 (en) * | 2001-05-01 | 2002-12-05 | The Japan Steel Works, Ltd. | Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel |
| CN1410586A (en) * | 2002-10-18 | 2003-04-16 | 东风汽车公司 | High performance hot working die steel for medium and small cross profile machine forging mould |
-
2006
- 2006-08-07 CN CNB2006100950141A patent/CN100419112C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100822A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Hot-work die steel |
| CN86101666A (en) * | 1986-03-29 | 1987-10-21 | 冶金工业部钢铁研究总院 | High performance hot-work die steel |
| US5207843A (en) * | 1991-07-31 | 1993-05-04 | Latrobe Steel Company | Chromium hot work steel |
| CN1090605A (en) * | 1993-02-01 | 1994-08-10 | 罗明科 | Alloy cast iron material for water cooling foundry hot swaging mould |
| US20020182099A1 (en) * | 2001-05-01 | 2002-12-05 | The Japan Steel Works, Ltd. | Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel |
| CN1410586A (en) * | 2002-10-18 | 2003-04-16 | 东风汽车公司 | High performance hot working die steel for medium and small cross profile machine forging mould |
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| CN1904122A (en) | 2007-01-31 |
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