Transactions of Materials and Heat Treatment

Title：Analysis of internal defects in rolled shaft during three-roll cross wedge rolling

Authors： YANG Yong-ming1 2 DU Feng-shan1 WANG Min-ting1 ZHAO Jun2(1.College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China 2.Department of Material Engineering North China Institute of Aerospace Engineering Langfang 065000 China)

Unit：

KeyWords： cross wedge rolling internal defects stress

ClassificationCode：TG335

year,vol(issue):pagenumber：2009,34(5):67-70

Abstract：

The research on the interior defects in three types of rolled shafts(such as solid part,hollow part,hollow part with mandrel) during three-roll cross wedge rolling(CWR) was researched.The results show that there is a ring zone with the distinct crack near the center of solid part,the ring defects are effectively avoided in the hollow part.Finite element analysis based on the experiment was carried out.Its results show that alternating shear stress is the first cause to the ring rarefaction defect at work piece's centre,pulling stress can promote the crack growth.The product quality for hollow shaft with mandrel is the best.The investigation can provide theoretical and experimental foundation for enriching the theory of 3-roll CWR and its application scope.

Funds：

国家自然科学基金资助项目(50075076,50705080);; 北华航天工业学院科研基金资助项目(KY-2008-03-B)

Reference：

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