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Heat treatment method of cold work die steel used for blanking die

A heat treatment method and technology for cold work die steel, applied in the field of iron and steel metallurgy, can solve the problems of shortened service life, can not meet the needs of use, etc., and achieve the effects of low cost, good fatigue resistance and spalling performance, and good toughness

Inactive Publication Date: 2014-05-14
锡山区鹅湖慧盾机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the development of technology and the improvement of steel plate strength, the existing cold-work die steel cannot meet the use requirements, or the service life is greatly shortened.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A heat treatment method for cold working die steel for blanking dies, the chemical composition of the die steel consists of the following components in weight percentage: C: 0.50, Si: 0.2, Mn: 1.5, Cr: 3.4, Mo: 0.7, Ni: 1.3, Ti: 0.02, Nb: 0.6, B: 0.03, V: 0.6, Al: 0.04, S≤0.015, P≤0.025, the balance is Fe and unavoidable impurities; the heat treatment method is: first , put the die steel into the heating furnace, heat it up to 860°C and keep it warm for 4 hours; then, cool it to 450°C and let it air cool; then heat it in the heating furnace to 1010°C and keep it warm for 4 hours; then, After cooling to 920°C, keep it warm for 1.5 hours; then, cool it in quenching oil at a temperature of 30°C; finally, heat it in a heating furnace to 290°C, keep it warm for 6 hours, and then cool it to 100°C, then take it out of the furnace and let it cool in air.

Embodiment 2

[0014] A heat treatment method for cold working die steel for blanking dies, the chemical composition of the die steel consists of the following components in weight percentage: C: 0.54, Si: 0.1, Mn: 1.7, Cr: 3.2, Mo: 0.9, Ni: 1.1, Ti: 0.04, Nb: 0.4, B: 0.05, V: 0.4, Al: 0.06, S≤0.015, P≤0.025, the balance is Fe and unavoidable impurities; the heat treatment method is: first, Put the mold steel into the heating furnace, heat it up to 870°C and keep it warm for 2 hours; then, cool it to 450°C and then take it out of the furnace for air cooling; then heat it to 1030°C in the heating furnace and keep it warm for 2 hours; After reaching 930°C, keep it warm for 0.5 hours; then, cool it in quenching oil with a temperature of 60°C; finally, heat it in a heating furnace to 270°C, keep it warm for 7 hours, and then cool it to 100°C and then take it out of the furnace and let it cool in air.

Embodiment 3

[0016] A heat treatment method for cold working die steel for blanking dies, the chemical composition of the die steel consists of the following components in weight percentage: C: 0.52, Si: 0.15, Mn: 1.6, Cr: 3.3, Mo: 0.8, Ni: 1.2, Ti: 0.03, Nb: 0.5, B: 0.04, V: 0.5, Al: 0.05, S≤0.015, P≤0.025, the balance is Fe and unavoidable impurities; the heat treatment method is: first , put the die steel into the heating furnace, heat it up to 865°C and keep it warm for 3 hours; then, cool it to 450°C and let it cool in air; then heat it in the heating furnace to 1020°C and keep it warm for 3 hours; After cooling to 925°C, keep it warm for 1 hour; then, cool it in quenching oil at a temperature of 45°C; finally, heat it in a heating furnace to 280°C, keep it warm for 6.5 hours, and then cool it to 100°C, then take it out of the furnace and let it cool in air.

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Abstract

The invention discloses a heat treatment method of cold work die steel used for a blanking die. The heat treatment method includes: firstly putting the die steel into a heating furnace, conducting heating to 860-870DEG C and then performing heat preservation for 2-4h; then, carrying out furnace cooling to 450DEG C, then conducting discharge from the furnace and air cooling; performing heating to 1010-1030DEG C in a heating furnace, and carrying out heat preservation for 2-4h; then, performing furnace cooling to 920-930DEG C and conducting heat preservation for 0.5-1.5h; then conducting cooling in quenching oil at 30-60DEG C; and finally, carrying out heating to 270-290DEG C in the heating furnace, then performing heat preservation for 6-7h, and conducting furnace cooling to 100DEG C, and then conducting discharge from the furnace and air cooling.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a heat treatment method for cold-working die steel for blanking dies. Background technique [0002] With the development of the mechanical processing industry, more and more parts are manufactured by cold working dies in production, and more and more types of cold deformation dies are used. Such as cold volume die forging (cold heading, cold extrusion, embossing, etc.), sheet metal stamping (such as stretching, blanking, trimming, punching, etc.) and material rolling (cold rolling, rolling wheel forming, etc.). Although there are many types of cold deformation molds, different working conditions, and different performance requirements, the basic working conditions are similar: that is, the metal is deformed in a cold state, and it is subjected to large shear force, pressure, bending force, and impact during work. force and friction. Therefore, this type of mol...

Claims

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Application Information

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IPC IPC(8): C22C38/58C21D6/00C21D1/18
Inventor 诸金平
Owner 锡山区鹅湖慧盾机械厂
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