Optimization of the investment casting process and defect control for variable cross−section components of TC4 alloy

He Tongzheng; Chen Yuyong; Wu Jingxi; Luo Guojun; Shen Xuanjin; Tang Liying

doi:10.7513/j.issn.1004-7638.2024.03.007

Volume 45 Issue 3

Jul. 2024

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He Tongzheng, Chen Yuyong, Wu Jingxi, Luo Guojun, Shen Xuanjin, Tang Liying. Optimization of the investment casting process and defect control for variable cross−section components of TC4 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 46-54. doi: 10.7513/j.issn.1004-7638.2024.03.007

Citation:

He Tongzheng, Chen Yuyong, Wu Jingxi, Luo Guojun, Shen Xuanjin, Tang Liying. Optimization of the investment casting process and defect control for variable cross−section components of TC4 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 46-54. doi: 10.7513/j.issn.1004-7638.2024.03.007

Citation:

He Tongzheng, Chen Yuyong, Wu Jingxi, Luo Guojun, Shen Xuanjin, Tang Liying. Optimization of the investment casting process and defect control for variable cross−section components of TC4 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 46-54. doi: 10.7513/j.issn.1004-7638.2024.03.007

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Optimization of the investment casting process and defect control for variable cross−section components of TC4 alloy

doi: 10.7513/j.issn.1004-7638.2024.03.007

He Tongzheng^{1, 2
,},
Chen Yuyong^{2, 3},
Wu Jingxi³,
Luo Guojun^{1, 2},
Shen Xuanjin^{1, 2},
Tang Liying^{1, 2}

1.
Panzhihua Research Institute of Iron & Steel Co., Ltd., Pangang Group, Panzhihua 617000, Sichuan, China
2.
Sichuan Engineering Research Center of Aerial Titanium Alloy Precision Casting, Panzhihua 617000, Sichuan, China
3.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

More Information

Received Date: 2024-02-23
Publish Date: 2024-07-02

Abstract

Abstract

In this study, the centrifugal investment casting process was optimized using ProCAST software based on an orthogonal experiment for TC4 alloy variable cross−section components. Simultaneously, the mold filling and solidification behaviors of the castings were investigated in detail, and the quality and mechanical properties of the castings were characterized. The results show that a small amount of shrinkage porosity is discretely distributed in the middle and bottom of the casting, while a large concentration is discretely distributed at the top. The formation of isolated liquid phase zones is the main reason for the shrinkage porosity, and the termination of melt metal flow exhibits the characteristics of a narrow crystallization temperature range. At the same time, the stress concentration mainly occurs at the connection between the inner sprue and the casting, and the major cause of it is the large structural change. The internal quality and dimensions of the casting were characterized, and it was discovered that there is no shrinkage porosity, the casting dimensions better satisfy the design requirements, and there is no visible deformation. The room-temperature tensile strength (UTS) of the hot isostatic pressing (HIPed) castings is 953.5 MPa, the yield strength (YS) is 835.0 MPa, and the elongation (EL) is 10.0%, which can better meet the actual service demands.
- TC4 alloy,
- variable cross−section components,
- investment casting,
- ProCAST numerical simulation,
- defect control

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References(26)

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