Transactions of Materials and Heat Treatment

Title：Experimental study on internal defect of heavy section shrinkage workpiece under one cross wedge rolling

Authors： HE Wei-wei ZHANG Kang-sheng JIA Zhen HU Zheng-huan(School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China)

Unit：

KeyWords： cross wedge rolling internal defect heavy section shrinkage forming angle

ClassificationCode：TG335.19

year,vol(issue):pagenumber：2009,34(2):27-30

Abstract：

To further study the state of the internal defects of heavy section shrinkage workpiece under one cross wedge rolling,the rolling experiment under different process conditions was done on H500 rolling mill.It is found that when the cross section shrinkage of one cross wedge rolling workpiece is bigger than 75%,the rolled pieces are not easy to have macroscopic internal defects.The influence rules of processing parameters to the internal defects are discovered and the forming angle is the most important mechanical parameter to affect the internal defects.The big forming angle has a tendency to reduce the internal defects.The results provide a guideline for the internal defect formation mechanism.

Funds：

国家自然科学基金项目(50575023,50435010);; 高等学校博士学科点专项科研基金项目(20050008024);; 国家科技支持计划项目(2006BAF04B03)

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