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Title:Influence of friction and lubrication conditions in the die on hot stamping for ultra high strength steel sheet
Authors: Li Bing1 Wang Min1 2 Zhang Chun1 Xiao Haifeng1 
Unit: (1.School of Materials Science and Engineering  Hubei University of Automotive Industry  Shiyan 442002 China 2. Material Forming and Mould Technology Open State Key Laboratory School of Mechanical Engineering  Huazhong University of Science and Technology  Wuhan 430074  China ) 
KeyWords: ultra high strength steel hot stamping FEM friction condition lubricantion condition 
ClassificationCode:TG386
year,vol(issue):pagenumber:2018,43(5):0-0
Abstract:

 For the auto girder, the influence of friction coefficient on the hot stamping for ultra high strength steel steel was analyzed by FEM simulation, and the influence of different lubrication conditions on the hot stamping for ultra high strength steel sheet was conducted by the hot stamping experiments. The results show that with the increasing of friction coefficient, the thickness of hot stamping parts becomes thinner, and the effective strain value becomes bigger. The hot stamping parts without lubricant have scratches, cracks and serious oxidation, and the hot stamping parts with graphite lubricant have scratches and cracks. However, the forming quality of hot stamping parts with glass lubricant is better, and the thickness of hot stamping parts increases gradually under three kinds of lubricant conditions. Thus, the glass lubricant is beneficial to the improvement of friction condition and oxidation resistance in the hot stamping process. Furthermore, the lubricant condition has little influence on the microstructure and mechanical properties of hot stamping parts, and the tensile strength of hot stamping parts is up to 1460 MPa and the microhardness is above 460 HV.  

Funds:
国家自然科学基金资助项目(51205116);湖北省自然科学基金资助项目(2017CFB587);湖北省高等学校优秀中青年科技创新团队项目(T201518)
AuthorIntro:
作者简介:李兵(1981-),男,硕士,副教授 Email:libing42158823@163.com
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