压铸铝合金发动机气缸体气孔分析及对策

杨兴国

doi:10.15980/j.tzzz.2019.05.017

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压铸铝合金发动机气缸体气孔分析及对策
Analysis and Countermeasures of Gas Hole in Aluminum Alloy Die Castings
2019年39卷第5期页码：524-526
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.05.017

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[1]杨兴国.压铸铝合金发动机气缸体气孔分析及对策[J].特种铸造及有色合金,2019,39(05):524-526.

Yang Xingguo. Analysis and Countermeasures of Gas Hole in Aluminum Alloy Die Castings[J]. Special Casting & Nonferrous Alloys, 2019,39(5):524-526.
[1]杨兴国.压铸铝合金发动机气缸体气孔分析及对策[J].特种铸造及有色合金,2019,39(05):524-526. DOI： 10.15980/j.tzzz.2019.05.017.

Yang Xingguo. Analysis and Countermeasures of Gas Hole in Aluminum Alloy Die Castings[J]. Special Casting & Nonferrous Alloys, 2019,39(5):524-526. DOI： 10.15980/j.tzzz.2019.05.017.

摘要

针对某款铝合金发动机气缸体打刻面出现的气孔问题

从铝合金压铸件气孔缺陷形成机理、铸造工艺和熔炼工艺等方面进行研究

采取了一系列相关措施。首先

提高压铸高速起点和降低脱模剂喷涂时间

效果不佳。然后

延长铝液的除气时间以降低其氢含量

效果仍然不明显。最后

在改善措施基础上

利用模拟软件

通过优化浇注系统

成功将铸件气孔不良率由2.5%降低到0.12%。

Abstract

The gas hole in the face for marking of an aluminum alloy cylinder block was analyzed.Based on the forming mechanism analysis of gas hole

casting parameters and smelting process of aluminum alloy die castings

a series of countermeasures were taken into accounted.First

through changing the high-speed starting point and the blowing time of release agent

the effects are unsatisfied.Then

the degassing time of the aluminum liquid is extended to reduce the hydrogen density

however

the effect presents poor.Finally

based on the previous improvement measures

the sinulation was carried out.Through optimizing gating system

gas hole in the die casting components is reduced from 2.5%to 0.12%.

关键词

气缸体气孔模具温度熔炼浇注系统

Keywords

Cylinder BlockGas HoleMold TemperatureSmeltingGoding System

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