Transactions of Materials and Heat Treatment

Title：Process parameters optimization for preventing fillet cracking of high strength steel plate hot stamping

Authors： Zhu Chengjun Li Kongzhao

Unit： Henan Polytechnic Institute

KeyWords： orthogonal test high strength steel sheet hot stamping fillet cracking

ClassificationCode：

year,vol(issue):pagenumber：2014,39(4):16-19

Abstract：

?In order to solve the phenomenon of fillet cracking caused by uneven thickness distribution of high strength boron steel, a coupled thermo-mechanical FEM model was set up，and the main reason for fillet cracking was the change of temperature and stress in the area. The optimal process combination to prevent fillet cracking was found based on orthogonal test. The results show that in the three factors of initial forming temperature, blank holder force and friction coefficient, the influence of friction coefficient is the largest. When the initial forming temperature was 850 ℃, the blank-holder forces was 70 MPa and the friction coefficient was 0.1, the forming ability was the best，and the qualified parts were gained, which verified the reliability of simulation results.

Funds：

河南工业职业技术学院院长资助基金项目 (GYYJ20130068)

朱成俊(1977- )男,硕士,副教授

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