Transactions of Materials and Heat Treatment

Title：Residual stress analysis of hot stamping for spherical head

Authors： Deng Xiaoting1 Zhang Shihong1 Liu Jinsong1 2 Xu Yong1 Chen Shuaifeng1 Wang Shoudong3 Lei Yuchuan3

Unit： 1. Institute of Metal Research Chinese Academy of Sciences 2.Shenyang Ligong University 3. Henan Shenzhou Heavy Heads Co. Ltd.

KeyWords： head hot stamping residual stress X-ray diffraction method full release method

ClassificationCode：

year,vol(issue):pagenumber：2016,41(4):14-19

Abstract：

Wrinkling and cracking easily happen in the straight part of spherical head, and one of the essential reasons is the excessive residual stress. It was introduced and analyzed the principle，procedure and application characteristics of undamaged X-ray diffraction method and damaged full release method. For material 12Cr2Mo1R(H)，the outer wall residual stress after hot stamping for spherical head was studied by the above methods. The residual stress distribution rule of outer wall of head was revealed: the residual stress values of head outer wall increased gradually from the bottom. The transition section was the transition area of stress value. After entering straight section, the residual stress reached the maximum value. The results show that the residual stress changing rules are the same by two methods of measurement, the residual stress values by full release method are bigger, the residual stress values achieve the maximum value in the straight section of the head outer wall.

Funds：

国家自然科学基金资助项目（51304186）

邓晓婷（1987-），女，博士研究生

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