模具结构对挤压铸造Al-Cu合金热裂倾向的影响

于宝义; 郑黎; 闫丽; 王飞雨; 王刚

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模具结构对挤压铸造Al-Cu合金热裂倾向的影响
Effects of Die Structure on Hot Tear Tendency of Al-Cu Alloy in Squeezing Casting
2006年第12期页码：789-791
纸质出版日期： 2006 ，
DOI：

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[1]于宝义,郑黎,闫丽,王飞雨,王刚.模具结构对挤压铸造Al-Cu合金热裂倾向的影响[J].特种铸造及有色合金,2006(12):789-791+750.

Yu Baoyi, Zheng Li, Yan Li, et al. Effects of Die Structure on Hot Tear Tendency of Al-Cu Alloy in Squeezing Casting[J]. Special Casting & Nonferrous Alloys, 2006,(12):789-791.
[1]于宝义,郑黎,闫丽,王飞雨,王刚.模具结构对挤压铸造Al-Cu合金热裂倾向的影响[J].特种铸造及有色合金,2006(12):789-791+750. DOI：

Yu Baoyi, Zheng Li, Yan Li, et al. Effects of Die Structure on Hot Tear Tendency of Al-Cu Alloy in Squeezing Casting[J]. Special Casting & Nonferrous Alloys, 2006,(12):789-791. DOI：

摘要

研究了模具结构对挤压铸造Al-Cu合金热裂倾向的影响

探讨了挤压铸造模具中集渣包对铸件热节提供有效补缩的机理。试验发现当集渣包的凝固模数大于相邻热节部位的凝固模数时

集渣包可以为热节部位提供有效补缩

从而大大降低铸件的热裂倾向。试验铸件的热裂率由模具修改前的27%降低至修改后（扩大集渣包）的6%。

Abstract

The effects of die structure on hot tear tendency of Al-Cu alloy in squeezing casting have been investigated

and the feeding mechanism of dross trap used for hot spot in die in squeezing casting has been discussed. Experimental results reveal that dross trap can effectively feed hot spot position when the solidification modulus of dross trap is more than that of adjacent hot spot position

which can significantly reduce the hot teat tendency of parts. The hot tear rate in the experimental parts is decreased from 27% （before die structure modified ） to 6% （after modified

such as enlarging dross trap）.