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Heat treatment technology for die Cr12MoV steel

A technology of die steel and steel, which is applied in the field of heat treatment process of die Cr12MoV steel, can solve problems such as easy collapse, and achieve the effect of improving the life of the die

Inactive Publication Date: 2018-02-23
HENGYANG FENGSHUN AXLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sheet metal stamping (such as stretching, blanking, trimming, punching, etc.) Friction, so this type of mold steel should have high hardness and high strength, high wear resistance to ensure that it is not easy to produce micro-plastic deformation or damage when subjected to high stress, and have enough toughness to withstand impact loads And under dynamic load, it is not easy to peel off or collapse the work toughness; the traditional heat treatment process cannot guarantee sufficient wear resistance and sufficient hardness, and it is easy to collapse when impacted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A heat treatment process for mold Cr12MoV steel, its main chemical composition is: C: 1.45-1.70; Si: ≤0.40; Mn: ≤0.40; S: ≤0.03; P: ≤0.03; Cr: 11-12.5; Ni : ≤0.25; Cu: ≤0.30; V: 0.15~0.30; Mo: 0.40~0.60, the specific process steps of heat treatment are as follows:

[0029] A. First, put the die steel into a box furnace and heat it to 865°C, and keep it in the box furnace for 2.5 hours.

[0030] B. Cool down to 460°C in a box furnace, take out the mold steel from the box furnace, air cool it, then put it into the box furnace, heat it to 1015°C, and keep it warm for 2.5 hours.

[0031] C, be cooled to 925 ℃ in box type furnace, insulation 1.5 hours.

[0032] D. Take the die steel out of the box furnace and put it into 40-70 quenching oil for cooling.

[0033] E. Put the mold steel cooled in the oil into the box furnace, heat it to 275°C, keep it warm for 6.5 hours, cool it to 100°C in the box furnace, take it out from the box furnace, and carry out air Free to cool.

Embodiment 2

[0035] A heat treatment process for mold Cr12MoV steel, its main chemical composition is: C: 1.45-1.70; Si: ≤0.40; Mn: ≤0.40; S: ≤0.03; P: ≤0.03; Cr: 11-12.5; Ni : ≤0.25; Cu: ≤0.30; V: 0.15~0.30; Mo: 0.40~0.60, the specific process steps of heat treatment are as follows:

[0036] A. First, put the die steel into a box furnace for heating, heat it to 870°C, and keep it in the box furnace for 3.5 hours.

[0037] B. Cool down to 460°C in a box furnace, take out the mold steel from the box furnace, air cool it, then put it into the box furnace, heat it to 1025°C, and keep it warm for 3.5 hours.

[0038] C, be cooled to 930 ℃ in box type furnace, insulation 1.7 hours.

[0039] D. Take the die steel out of the box furnace and put it into 40-70 quenching oil for cooling.

[0040] E. Put the mold steel cooled in the oil into the box furnace, heat it to 285°C, keep it warm for 7 hours, cool it to 100°C in the box furnace, take it out from the box furnace, and carry out air Free to c...

Embodiment 3

[0042] A heat treatment process for mold Cr12MoV steel, its main chemical composition is: C: 1.45-1.70; Si: ≤0.40; Mn: ≤0.40; S: ≤0.03; P: ≤0.03; Cr: 11-12.5; Ni : ≤0.25; Cu: ≤0.30; V: 0.15~0.30; Mo: 0.40~0.60, the specific process steps of heat treatment are as follows:

[0043] A. First, put the mold steel into a box furnace for heating, heat it to 875°C, and keep it in the box furnace for 4.5 hours.

[0044] B. Cool down to 460°C in a box furnace, take out the die steel from the box furnace, air cool it, then put it into the box furnace, heat it to 1035°C, and keep it warm for 4.5 hours.

[0045] C, be cooled to 935 ℃ in box type furnace, insulation 2 hours.

[0046] D. Take the die steel out of the box furnace and put it into 40-70 quenching oil for cooling.

[0047] E. Put the mold steel cooled in the oil into the box furnace, heat it to 295°C, keep it warm for 7.5 hours, cool it to 100°C in the box furnace, take it out from the box furnace, and carry out air Free to c...

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Abstract

A heat treatment process for mold Cr12MoV steel. The main chemical composition of the mold steel is: C: 1.45-1.70; Si: ≤0.40; Mn: ≤0.40; S: ≤0.03; P: ≤0.03; Cr: 11-12.5 ; Ni: ≤0.25; Cu: ≤0.30; V: 0.15~0.30; After cooling to a certain temperature, take it out of the furnace and air-cool it, then put it into the heating furnace to heat and then keep it warm; C. Cool in the furnace and then keep it warm; D. Put the mold steel into the quenching oil to cool; E. Put the mold steel into the furnace Heating, then heat preservation, then cooling, and finally taking out the furnace and air cooling; the present invention makes the mold steel have high hardness, high strength and sufficient toughness through repeated heating, heat preservation and cooling.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a heat treatment process of Cr12MoV steel for molds. Background technique [0002] With the development of industrial mechanization, more and more parts are manufactured by cold working dies in production. The stamping parts of automobiles, machinery, and electromechanical all need dies to be stamped out, and there are more and more types of cold deformation dies. Sheet metal stamping (such as stretching, blanking, trimming, punching, etc.) Friction, so this type of mold steel should have high hardness and high strength, high wear resistance to ensure that it is not easy to produce micro-plastic deformation or damage when subjected to high stress, and have enough toughness to withstand impact loads And under dynamic load, it is not easy to peel off or collapse the work toughness; the traditional heat treatment process cannot guarantee sufficient wea...

Claims

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Application Information

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IPC IPC(8): C21D6/00C22C38/46C22C38/44C22C38/42C22C38/24C22C38/22C22C38/20C22C38/02C22C38/04
CPCC21D6/002C21D6/004C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/42C22C38/44C22C38/46
Inventor 尤华胜
Owner HENGYANG FENGSHUN AXLE CO LTD
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