Analysis Failure and Improvement of Service life of Aluminum Alloy Die casting Die

Ding Hai; Gong Yongjian; Liu Tao

doi:10.15980/j.tzzz.2014.09.056

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Analysis Failure and Improvement of Service life of Aluminum Alloy Die casting Die
Vol. 34, Issue 9, Pages: 942-944(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.09.056

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[1]丁海,公永建,刘涛.铝合金压铸模具的失效分析及寿命提高措施[J].特种铸造及有色合金,2014,34(09):942-944.

Ding Hai, Gong Yongjian, Liu Tao. Analysis Failure and Improvement of Service life of Aluminum Alloy Die casting Die. [J]. Special Casting & Nonferrous Alloys 34(9):942-944(2014)
[1]丁海,公永建,刘涛.铝合金压铸模具的失效分析及寿命提高措施[J].特种铸造及有色合金,2014,34(09):942-944. DOI： 10.15980/j.tzzz.2014.09.056.

Ding Hai, Gong Yongjian, Liu Tao. Analysis Failure and Improvement of Service life of Aluminum Alloy Die casting Die. [J]. Special Casting & Nonferrous Alloys 34(9):942-944(2014) DOI： 10.15980/j.tzzz.2014.09.056.

摘要

通过硬度测试、金相组织观察

研究分析了铝合金压铸模发生早期龟裂失效的原因。结果表明

压铸模的失效原因主要是电加工导致的缺陷、材料热处理工艺不当、以及金属液的冲击等。通过热处理工艺及加工工艺优化

将压铸模设计硬度（HRC）降低为46

对应的热处理工艺调整为480、700、850℃分级加热+1050℃真空油淬+600℃二次回火

合理预热压铸模

定期进行退火处理等

提高了铝合金压铸模的使用寿命。

Abstract

Through hardness testing

metallographic microscope analysis

and other means

the origination of crack failure in the die casting die for aluminum alloy was analyzed.The results reveal that the crack failure of the mould is mainly attributed to the electrical discharge machining

the improper heat treatment process and the impact of liquid metal.Through the optimization of the heat treatment process

such as multi-staged heating at 480

700 and 850℃ +vacuum oild quenching at 1 050℃ +seconding tempering at 600℃

and proper preheating mould as well as annealing treatment to reduce design hardness to 46

7（HRC）

the service life of die is improved greatly.