PREDICTION OF SHRINKAGE CAVITY AND POROSITY IN GRAY CAST IRON DURING SOLIDIFICATION

Acta Metall Sin

2005, Vol. 41

Issue (9): 929-932 DOI:

Research Articles

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PREDICTION OF SHRINKAGE CAVITY AND POROSITY IN GRAY CAST IRON DURING SOLIDIFICATION

YANG Jie; DONG Huaiyu ; XIONG Shoumei

Department of Mechanical Engineering; Tsinghua University; Beijing 100084; Key Laboratory for Advanced Manufacturing by Materials Processing Technology; Tsinghua University; Beijing 100084

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YANG Jie; DONG Huaiyu; XIONG Shoumei. PREDICTION OF SHRINKAGE CAVITY AND POROSITY IN GRAY CAST IRON DURING SOLIDIFICATION. Acta Metall Sin, 2005, 41(9): 929-932 .

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Abstract The effects of carbon equivalent and inoculation on solidification process of gray cast iron were studied by thermal analysis experiments and pouring experiments of gray iron castings. Based on the dynamic expansion and contraction accumulation method, a shrinkage prediction model of gray cast iron was developed, in which the pouring temperature, carbon equivalent and inoculation were comprehensively considered. Besides, all the volume variations during solidification process, such as the contraction of melt, the contraction or expansion of primary graphite or austenite and eutectic phase, were taken into consideration during computation. A numerical simulation system especially for the solidification process of gray iron castings was developed and used to analyze the solidification process of practical gray iron castings. The simulation results are consistent with the experimental ones.

Key words: gray cast iron solidification shrinkage cavity and porosity

Received: 06 February 2005

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