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Investigations on Hydrogen Content Change in Melt Aluminum during Casting under Adjusted Pressure

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Abstract:

In this paper, a new low-pressure die-casting with degassing function, casting under adjusted pressure (CAP), is proposed. The working principle of CAP process is introduced in details. This paper focuses on the influences of moisture of compressed air on the hydrogen content within the melt aluminum during the cyclic vacuum-pressurizing programs for CAP process. The experimental results indicate that degassing under vacuum acts positive in refining aluminum melt. The relative moisture of compressed air exerts a significant influence on the hydrogen content of aluminum melt. After the melt aluminum is exposed to the air with a relative moisture of 85% for 90 min, the hydrogen content of the melt aluminum can get to 0.4 ml/100g/Al; while under the circumstance of CAP process, the hydrogen content is maintained between 0.05 and 0.15 ml/100g/Al depending on the moisture capacity of the air, which virtually has no more influence on the casting qualities. Under the condition of dry compressed air, the hydrogen content can be kept at a level as low as 0.05ml/100g/Al, which facilitates to obtain high air-tightness castings.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

3059-3062

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.3059

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Online since:

September 2007

Authors:

Zheng Bin Xu, Yong Zhi Zou, Hong Gu, Jian Min Zeng

Keywords:

Aluminum Melt, CAP Process, Hydrogen

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] G.K. Sigworth, C. Wang: AFS Trans., Vol. 27 (1994), p.245.

Google Scholar

[2] K.E. Honer, Z. Youling: Giessereiforschung, Vol. 39 (1987), p.34.

Google Scholar

[3] F. Mondolfo: Aluminum Alloys: Structure and Properties. (Buttersworth, London 1976).

Google Scholar

[4] David V. Neff: Degassing and Cleaning of Molten Aluminum. Proceedings of 3rd International Conference on Aluminum Processing. II (1994): 57-72.

Google Scholar

[5] G.S. Fu, J.X. Kang: Journal of Fuzhou University (Nature Science), Vol. 23 (1995), pp.48-49.

Google Scholar

[6] Z.Y. Li: Light Alloy Fabrication Technology, Vol. 22 (1994), pp.29-30.

Google Scholar

[7] L.N. Hu, X. F. Bian and Y.F. Duan: Journal of University of Science and Technology Beijing, Vol. 11 (2004), p.141.

Google Scholar

[8] L.Y. Huang: Casting Non-ferrous Alloys and Their Melting (National Defence Industry Press, Beijing 1980).

Google Scholar

[9] Z.H. Zhang, X.F. Bian and X.F. Liu: The Chinese Journal of Nonferrous Metals Vol. 10 (2000) p.219.

Google Scholar