Applying the Reduced Pressure Sample Density to Predict the Hydrogen Blow Hole Degree of Aluminium Alloy Casting

Mao Weimin; Zhong Taoxing

doi:10.13374/j.issn1001-053x.1997.05.007

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Mao Weimin, Zhong Taoxing. Applying the Reduced Pressure Sample Density to Predict the Hydrogen Blow Hole Degree of Aluminium Alloy Casting[J]. Chinese Journal of Engineering, 1997, 19(5): 446-450. doi: 10.13374/j.issn1001-053x.1997.05.007

Citation:

Mao Weimin, Zhong Taoxing. Applying the Reduced Pressure Sample Density to Predict the Hydrogen Blow Hole Degree of Aluminium Alloy Casting[J]. Chinese Journal of Engineering, 1997, 19(5): 446-450. doi: 10.13374/j.issn1001-053x.1997.05.007

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Applying the Reduced Pressure Sample Density to Predict the Hydrogen Blow Hole Degree of Aluminium Alloy Casting

doi: 10.13374/j.issn1001-053x.1997.05.007

Mao Weimin¹,
Zhong Taoxing²

1. Material Science and Engineering School, UST Beijing, Beijing 100083, China;
2. Beijing Polytechnic University, Beijing, China

Received Date: 1996-09-25
Available Online: 2021-09-10

Abstract

Abstract

The RPS (sample solidified under reduced pressure) was made of a sand sample cup with which the conventional preheated metallic sample cup was substituted.As a result, the hydrogen blow hole degree of aluminium alloy casting can be predicted by the RPS' density and the quality of the melt can be controlled. Moreover a prevacuumized chamber is designed in the test apparatus, and the solidification chamber may reach the reduced pressure value in the shortest time so that the more exact test can be done. The properly reduced pressure of solidification with sand cup is about 11.3 kpa.
- density,
- reduced pressure solidiflcation,
- hydrogen blow hole,
- aluminium alloy