Automobile die steel processing technology

A processing technology, a technology of automobile molds, applied in the field of automobile mold steel processing technology, to achieve the effect of improving strength and toughness and preventing premature fracture and failure

Inactive Publication Date: 2018-04-27
重庆华厦新力新能源汽车有限公司
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AI Technical Summary

Problems solved by technology

The mold failure analysis shows that the high temperature treatment factor has the greatest influence, accounting for about 50%. In view of the existing defects in the process, in order to ensure product quality, it is necessary to make further improvements

Method used

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Embodiment Construction

[0013] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0014] A kind of automobile die steel processing technology, material is 3Cr2W8, and this processing method comprises the following steps:

[0015] (1) Forging process: pre-high temperature 760°C-830°C, high temperature 950°C-2100°C, initial forging temperature 1050°C-2100°C, final forging temperature 830°C-950°C, slow cooling; during forging, Repeat pier rough drawing and lengthening for no less than 3 times; during the forging process, when the temperature is > 1050°C, hit lightly; when the temperature is 970-1050°C, hit hard; when the temperature is <970°C, hit lightly;

[0016] (2) Spheroidizing annealing process: heat up to 860°C at a rate of ≤90°C / h, cool in a furnace at a rate of 25-30°C / h to 750°C, and then cool in a furnace at a rate of 10-15°C / h to Furnace cooling at 600°C, and then air cooling after leaving the furnace;

[0017] (3...

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Abstract

The invention discloses a processing technology for automobile mold steel, the material is 3Cr2W8, and it is characterized in that the processing method comprises the following steps: (1) forging process; (2) spheroidizing annealing process; (3) rough processing; (4) ) quenching and tempering; (5) semi-finished car; (6) high temperature treatment; (7) finishing; (8) polishing; (9) stress relief tempering. The automobile mold steel processing technology of the present invention can improve its strength and toughness by standardizing the requirements of each step, parameter conditions and precautions, and prevent premature fracture and failure of the mold.

Description

technical field [0001] The invention belongs to the field of automobile mold steel processing technology, in particular to an automobile mold steel processing technology. Background technique [0002] 3Cr2W8 steel is one of the widely used cold-work automobile mold steels in China. This steel has the advantages of good hardenability, high hardness and wear resistance, and small deformation after high temperature treatment. It is often used to make cold work molds that bear heavy loads, have large production batches, and complex shapes, such as cold stamping, embossing, cold heading, Cold extrusion die, etc. However, the obvious disadvantage of this steel is its high brittleness, which often leads to early failure of the mold. Therefore, how to improve its strength and toughness and prevent premature fracture and failure of the mold is a problem that users of this steel often encounter and need to solve. The mold failure analysis shows that the high temperature treatment f...

Claims

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Application Information

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IPC IPC(8): C21D8/00C21D1/32C21D1/18
CPCC21D8/005C21D1/18C21D1/32
Inventor 刘存福
Owner 重庆华厦新力新能源汽车有限公司
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