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Analysis of Quenching Cracks of Pump Axle |
JI Jia-ming, WU Jing |
School of Material Science and Engineerig, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract The quenching cracks in pump axle for automobile engine were observed by optical microscope and scanning electron microscope, and the factors which influence the crack formation were analyzed. It is shown that the main causes of crack formation in pump axle are structure stress, thermal stress, dimension of work piece, band carbanitride and brittle nonmetallic inclusions distributed in different forms. According to the results of observation and analysis, material determination method and optimum heat treatment process are proposed.
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Received: 08 August 2013
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