Effect of leaching process for ceramic core on microstructure and mechanical property of investment cast co-base superalloy DZ40M

被引：0

作者：

Tong J. ^{[1
]}

Chen J. ^{[2
]}

Zheng Z. ^{[1
]}

Yu Y. ^{[3
]}

Ning L. ^{[1
]}

Liu E. ^{[1
]}

机构：

[1] Institute of Metal Research, Chinese Academy of Sciences, Shenyang

[2] Representative Office of PLA in 430, Xi'an

[3] School of Materials Science and Engineering, Dalian University of Technology, Dalian

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2016年 / 30卷 / 02期

关键词：

Core leaching technology; DZ40M alloy; Hydrogen embrittlement; Mechanical properties; Metallic materials; Microstructure;

D O I：

10.11901/1005.3093.2015.204

中图分类号：

学科分类号：

摘要：

Effect of the leaching process of SiO2-and Al2O3-based ceramic core on the microstructure and mechanical property of the investment cast Co-based superalloy DZ40M is investigated. It is shown that after immersion in the leaching medium for SiO2-based ceramic core for 24 h, the microstructure and mechanical property of the alloy does not vary evidently; although after immersion in the leaching medium for Al2O3-based ceramic core for above 300 h, the microstructure variation of DZ40M alloy is not evident, but its mechanical property decreased remarkably, which may be due to the occurrence of an embrittled layer of about 1 mm in thickness on the alloy surface. The embrittled layer is caused by hydrogen embrittlement resulted from charging hydrogen during immersion in the leaching medium for Al2O3-based ceramic core. © All right reserved.

引用

页码：140 / 148

页数：8

共 6 条

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