Application of Vacuum and Partial Pressurization in Die Casting Automobile Components

Chen Bin1; Zeng Xiaoqin2; Chen Xiaoyong2; Peng Yinghong1

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Application of Vacuum and Partial Pressurization in Die Casting Automobile Components
Vol. 29, Issue 9, Pages: 820-823(2009)
Published： 2009 ，
DOI：

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[1]陈彬,曾小勤,谌晓勇,彭颖红.抽真空及局部增压工艺在压铸生产上的实践[J].特种铸造及有色合金,2009,29(09):820-823+779-780.

Chen Bin1, Zeng Xiaoqin2, Chen Xiaoyong2, et al. Application of Vacuum and Partial Pressurization in Die Casting Automobile Components. [J]. Special Casting & Nonferrous Alloys 29(9):820-823(2009)
[1]陈彬,曾小勤,谌晓勇,彭颖红.抽真空及局部增压工艺在压铸生产上的实践[J].特种铸造及有色合金,2009,29(09):820-823+779-780. DOI：

Chen Bin1, Zeng Xiaoqin2, Chen Xiaoyong2, et al. Application of Vacuum and Partial Pressurization in Die Casting Automobile Components. [J]. Special Casting & Nonferrous Alloys 29(9):820-823(2009) DOI：

摘要

针对某汽车零部件压铸产品的气孔、缩孔等缺陷

尝试了在压铸生产上采取结合抽真空及局部增压工艺的方法

设计了4组试验方案:第1组不采用抽真空和局部增压;第2组采用抽真空、不采用局部增压;第3组采用局部增压、不采用抽真空;第4组同时采取抽真空和局部增压。结果表明

单独采用抽真空工艺可以解决压铸件的气孔问题

单独采用局部增压工艺可以解决压铸件厚大部位的缩孔问题

同时采用抽真空和局部增压

可以同时解决气孔、缩孔问题。不采用局部增压和抽真空工艺

铸件的孔隙率为9.7%;采用局部增压、不采用抽真空

铸件的孔隙率下降到5.6%;同时采用抽真空和局部增压

铸件的孔隙率进一步下降到3.7%。

Abstract

Combination of vacuum and partial pressurization was adopted to eliminate the gas hole and shrinkage porosity in die casting automobile components. Four kinds of comparative experimental designs were presented including conventional die casting

vacuum die casting

partial pressurization die casting and combination of vacuum and partial pressurization. The results indicate that gas hole in die casting components can be eliminated by vacuum die casting

and shrinkage porosity in thick location of the castings can be solved

and both gas hole and shrinkage porosity can be relieved by combination of vacuum and partial pressurization method

which decrease the shrinkage porosity to 3.7% in the die casting components while shrinkage porosity in the conventional die casting components reaches 9.7%. In addition

the shrinkage porosity is decreased to 5.6% in partial pressurization die casting components.