CN102936692B - Cold punching die mold steel processing method - Google Patents
Cold punching die mold steel processing method Download PDFInfo
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- CN102936692B CN102936692B CN201210406363.6A CN201210406363A CN102936692B CN 102936692 B CN102936692 B CN 102936692B CN 201210406363 A CN201210406363 A CN 201210406363A CN 102936692 B CN102936692 B CN 102936692B
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Abstract
The invention discloses a cold punching die mold steel processing method. The method comprises the steps that: a, a mold steel blank material casting step is carried out, wherein the mold steel blank material comprises the chemical components of, by weight: 0.26-0.36% of carbon, 1.05-1.50% of manganese, 0.35-0.60% of silicon, no more than 0.034% of phosphorus, no more than 0.0360% of sulfur, 0.450-0.65% of chromium, 0.003-0.006% of molybdenum, 0.001-0.025% of nickel, 0.005-0.015% of vanadium, 0.008-0.025% of copper, and a substrate of iron; the temperature of cast and shaped mold steel is reduced to 290 DEG C, and is increased to 650-760 DEG C; the temperature is maintained for 5-6h; furnace cooling is carried out until the temperature is 280-320 DEG C, and the temperature is maintained for 3-5h; the temperature is increased to 650-690 DEG C, and is maintained for 32h; and the temperature is reduced to 400 DEG C with a speed of 40 DEG C/h, and is reduced to 120 DEG C with a speed of 18 DEG C/h. The method provided by the invention has the advantages of simple process, good effect, low material cost, and good performance of prepared drawing die mold steel.
Description
Technical field
The present invention relates to the working method of cold-punching mould die steel.
Background technology
At present, cold-punching mould die steel, production technology has the following disadvantages:
1, large batch of product, large by labor intensity of operating staff, and quality product, entirely with manual control, labour-intensive technology, is inappropriate this technique of using, and production efficiency is very low;
2, its toughness is not fine, can not satisfy the demand, and for withstanding shocks, load easily causes fracture.
Summary of the invention
A kind of working method of cold-punching mould die steel is provided in object of the present invention, and technique of the present invention is simple, effective, and the cost of material is low, the die steel good mechanical property making.
Technical scheme of the present invention is as follows:
The working method of cold-punching mould die steel, comprises the following steps:
A, casting mold steel billet material step
In die steel blank, the weight percent of each chemical composition is: carbon 0.26-0.36%, manganese 1.05-1.50%, silicon 0.35-0.60%, phosphorus≤0.034%, sulphur≤0.0360%, chromium 0.450-0.65%, molybdenum 0.003-0.006%, nickel 0.001-0.025%, vanadium 0.005-0.015%, copper 0.008-0.025%, and matrix is iron; The die steel temperature of casting is down to 290 ℃, reheats to 650-760 ℃, and insulation 5-6 hour, stove is chilled to 280-320 ℃, insulation 3-5 hour, reheats to 650-690 ℃, is incubated 32 hours, be cooled to 400 ℃ with 40 ℃/h, then with 18 ℃/h, be cooled to 120 ℃;
B, heat treatment step
Die steel after hot school is processed is heated to 900-950 ℃, then puts into 200-300 ℃ of salt bath insulation isothermal quenching in 2-3 hour, reheats 330-380 ℃, is incubated 2-3 hour temper;
C, by the die steel Shot Blasting after thermal treatment;
D, quench treatment: die steel is sent into and in heat treatment furnace, is heated to 850-890 ℃, and be incubated 2-3 hour; Then, cooling with quenching oil;
E, temper: the die steel after quenching is sent in tempering stove and is heated to 300-400 ℃, be incubated 50-70min; After air cooling, die steel is processed 5-6 hour in liquid nitrogen at-190 ℃;
F, bonderizing; by workpiece, at showing tremendous enthusiasm closure temperature, be 180-200 ℃ at normal temperatures; adopt the surface conditioner that pH value is 8 to process 1min; after dripping empty 1-2min; adopt phosphorization agent to process 15-20min, then after dripping empty 1-2min, adopt clear water to clean 1-2min; drip again after empty 1-2min, workpiece is placed in to the hot water of 78-100 ℃, process 0.5-1min;
G, by the piece packaging of Shot Blasting.
In described step b, the die steel after hot school is processed is heated to 930 ℃, then puts into 250 ℃ of salt bath insulations isothermal quenching in 2.5 hours, reheats 350 ℃, is incubated 2.5 hours temper.
The present invention makes it be beneficial to large batch of industrialized production, and the phenomenon that has reduced appearance folder dirt in forging process, has been not fully filled, the mechanical property of product is further improved, saved product materials, technique is simple, effective, and the cost of material is low, the die steel good mechanical property making, the die life of having improved product.
Embodiment
The working method of cold-punching mould die steel, comprises the following steps:
A, casting mold steel billet material step
In die steel blank, the weight percent of each chemical composition is: carbon 0.26-0.36%, manganese 1.05-1.50%, silicon 0.35-0.60%, phosphorus≤0.034%, sulphur≤0.0360%, chromium 0.450-0.65%, molybdenum 0.003-0.006%, nickel 0.001-0.025%, vanadium 0.005-0.015%, copper 0.008-0.025%, and matrix is iron; The die steel temperature of casting is down to 290 ℃, reheats to 650-760 ℃, and insulation 5-6 hour, stove is chilled to 280-320 ℃, insulation 3-5 hour, reheats to 650-690 ℃, is incubated 32 hours, be cooled to 400 ℃ with 40 ℃/h, then with 18 ℃/h, be cooled to 120 ℃;
B, heat treatment step
Die steel after hot school is processed is heated to 900-950 ℃, then puts into 200-300 ℃ of salt bath insulation isothermal quenching in 2-3 hour, reheats 330-380 ℃, is incubated 2-3 hour temper;
C, by the die steel Shot Blasting after thermal treatment;
D, quench treatment: die steel is sent into and in heat treatment furnace, is heated to 850-890 ℃, and be incubated 2-3 hour; Then, cooling with quenching oil;
E, temper: the die steel after quenching is sent in tempering stove and is heated to 300-400 ℃, be incubated 50-70min; After air cooling, die steel is processed 5-6 hour in liquid nitrogen at-190 ℃;
F, bonderizing; by workpiece, at showing tremendous enthusiasm closure temperature, be 180-200 ℃ at normal temperatures; adopt the surface conditioner that pH value is 8 to process 1min; after dripping empty 1-2min; adopt phosphorization agent to process 15-20min, then after dripping empty 1-2min, adopt clear water to clean 1-2min; drip again after empty 1-2min, workpiece is placed in to the hot water of 78-100 ℃, process 0.5-1min;
G, by the piece packaging of Shot Blasting.
In described step b, the die steel after hot school is processed is heated to 930 ℃, then puts into 250 ℃ of salt bath insulations isothermal quenching in 2.5 hours, reheats 350 ℃, is incubated 2.5 hours temper.
Of the present invention
powerperformance detection data is as follows:
Of the present invention
powerperformance detection data is as follows:
Performance index are as follows after testing:
Hardness HRC:61-69
Bending strength: 2400-2900Mpa
Impelling strength: 65-74J/cm2
Ultimate compression strength: 2000-2300 Mpa
Wear resistance: reach D2.
Claims (1)
1. the working method of cold-punching mould die steel, is characterized in that: comprise the following steps:
A, casting mold steel billet material step
In die steel blank, the weight percent of each chemical composition is: carbon 0.26-0.36%, manganese 1.05-1.50%, silicon 0.35-0.60%, phosphorus≤0.034%, sulphur≤0.0360%, chromium 0.450-0.65%, molybdenum 0.003-0.006%, nickel 0.001-0.025%, vanadium 0.005-0.015%, copper 0.008-0.025%, and matrix is iron; The die steel temperature of casting is down to 290 ℃, reheats to 650-760 ℃, and insulation 5-6 hour, stove is chilled to 280-320 ℃, insulation 3-5 hour, reheats to 650-690 ℃, is incubated 32 hours, be cooled to 400 ℃ with 40 ℃/h, then with 18 ℃/h, be cooled to 120 ℃;
B, heat treatment step
Die steel after hot school is processed is heated to 900-950 ℃, then puts into 200-300 ℃ of salt bath insulation isothermal quenching in 2-3 hour, reheats 330-380 ℃, is incubated 2-3 hour temper;
C, by the die steel Shot Blasting after thermal treatment;
D, quench treatment: die steel is sent into and in heat treatment furnace, is heated to 850-890 ℃, and be incubated 2-3 hour; Then, cooling with quenching oil;
E, temper: the die steel after quenching is sent in tempering stove and is heated to 300-400 ℃, be incubated 50-70min; After air cooling, die steel is processed 5-6 hour in liquid nitrogen at-190 ℃;
F, bonderizing; at normal temperatures by workpiece in showing tremendous enthusiasm sealing; temperature is 180-200 ℃; adopt the surface conditioner that pH value is 8 to process 1min, after dripping empty 1-2min, adopt phosphorization agent to process 15-20min; again after dripping empty 1-2min; adopt clear water to clean 1-2min, then drip after empty 1-2min, workpiece is placed in to the hot water of 78-100 ℃, process 0.5-1min;
G, packing.
2.the working method of cold-punching mould die steel according to claim 1, it is characterized in that: in described step b, the die steel after hot school is processed is heated to 930 ℃, then put into 250 ℃ of salt bath insulations isothermal quenching in 2.5 hours, reheat 350 ℃, be incubated 2.5 hours temper.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406363.6A CN102936692B (en) | 2012-10-23 | 2012-10-23 | Cold punching die mold steel processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210406363.6A CN102936692B (en) | 2012-10-23 | 2012-10-23 | Cold punching die mold steel processing method |
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| CN102936692A CN102936692A (en) | 2013-02-20 |
| CN102936692B true CN102936692B (en) | 2014-10-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105483503A (en) * | 2015-12-04 | 2016-04-13 | 皖西学院 | Preparation method of mold steel for excavator track |
| CN105543579A (en) * | 2015-12-28 | 2016-05-04 | 合肥中澜新材料科技有限公司 | Forging technique of low-chromium aluminum alloy ingot |
| CN105729079B (en) * | 2016-03-30 | 2018-01-02 | 马鞍山市长冶重工科技有限公司 | A kind of processing method of piston forging die |
| CN106011597A (en) * | 2016-07-28 | 2016-10-12 | 董超超 | Die steel capable of detecting integrity thereof |
| CN106702271A (en) * | 2016-11-21 | 2017-05-24 | 杭州汽轮铸锻有限公司 | Low alloy and high strength B50E54C casting material and casting preparation method |
| CN106591685B (en) * | 2016-12-13 | 2018-10-30 | 柳州通为机械有限公司 | Automobile axle shaft forge die |
| CN107217203A (en) * | 2017-04-12 | 2017-09-29 | 滁州市东华模具制造有限公司 | A kind of preparation method of steel wheel hub cold punching die |
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| CA2059293A1 (en) * | 1989-06-30 | 1990-12-31 | Peter Robert Saxby | Steel composition for a composite roll and heat treatment thereof |
| JP2002167644A (en) * | 2000-11-30 | 2002-06-11 | Daido Steel Co Ltd | Cold tool steel having constant deformation on treatment and method for producing cold tool using the steel |
| CN101549448B (en) * | 2008-03-31 | 2010-11-17 | 江都狮鹤高强度螺栓有限公司 | Processing technology for high-strength bolt used for steel net frame bolt ball node |
| CN101549449B (en) * | 2008-03-31 | 2011-01-19 | 江都狮鹤高强度螺栓有限公司 | Processing technology for high-strength large hexagon head bolt used for steel structure |
| CN102140612A (en) * | 2011-02-23 | 2011-08-03 | 上海三一重机有限公司 | Multi-component alloy cast steel bucket tooth and production process thereof |
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