热等静压对铸造AlSi7Cu2Mg合金缺陷及性能的影响

卫振华; 毛红奎; 张文达; 刘洪斌; 侯建兵; 徐宏

doi:10.15980/j.tzzz.2021.03.019

研究·合金工艺 | 浏览量 : 0 下载量: 15 CSCD: 0

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热等静压对铸造AlSi7Cu2Mg合金缺陷及性能的影响
Effects of Hot Isostatic Pressing on the Defect and Properties of AlSi7Cu2Mg Alloy
2021年41卷第3期页码：349-353
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.03.019

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[1]卫振华,毛红奎,张文达,刘洪斌,侯建兵,徐宏.热等静压对铸造AlSi7Cu2Mg合金缺陷及性能的影响[J].特种铸造及有色合金,2021,41(03):349-353.

Wei Zhenhua, Mao Hongkui, Zhang Wenda, et al. Effects of Hot Isostatic Pressing on the Defect and Properties of AlSi7Cu2Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(3):349-353.
[1]卫振华,毛红奎,张文达,刘洪斌,侯建兵,徐宏.热等静压对铸造AlSi7Cu2Mg合金缺陷及性能的影响[J].特种铸造及有色合金,2021,41(03):349-353. DOI： 10.15980/j.tzzz.2021.03.019.

Wei Zhenhua, Mao Hongkui, Zhang Wenda, et al. Effects of Hot Isostatic Pressing on the Defect and Properties of AlSi7Cu2Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(3):349-353. DOI： 10.15980/j.tzzz.2021.03.019.

摘要

采用砂型铸造AlSi7Cu2Mg铝合金阶梯形铸件

对不同部位试样进行等静处理

研究了不同热等静压压力（80～120 MPa）、时间（1～3h）对不同壁厚铸件缺陷及性能的影响。结果表明

随着热等静压压力增大和保压时间延长

不同壁厚铸件孔洞减少、密度提升

抗拉强度相应增大。铸件壁厚越大

密度和抗拉强度提升越明显;在热等静压温度（490℃）、压力（100 MPa）不变条件下

保温时间超过2h

铸件密度增加幅度较小;而在热等静压温度（490℃）、时间（2h）不变条件下

当热等静压压力超过临界值（100MPa）后

铸件抗拉强度提升不明显。

Abstract

The effects of hot isostatic pressure（HIP）（80～120 MPa）and duration（1～3 h）on defects and properties of AlSi7 Cu2 Mg alloy castings with different wall thickness were investigated by multi-step sand casting.The results reveal that with the increase of HIP pressure and holding time

the holes are reduced

the density and the tensile strength of castings with different wall thickness are enhanced.The thicker the wall thickness is

the more obvious the enhancement of density and tensile strength is.When the holding time is more than 2 hunder the fixed HIP temperature（490℃）and pressure（100 MPa）

the density is slightly increased

while the tensile strength has no obvious improvement when the HIP pressure exceeds a critical value（～100 MPa）under the fixed HIP temperature（490℃）and time（2 h）.