Solutions for Hydrogen-Induced Delayed Fracture in Hot Stamping
One of the main targets in automotive industry is to reduce the weight of vehicle as well as increase the safety.To accomplish this goal, press-hardening steel and hot stamping parts have been used in car body.However, the possibility of hydrogen-induced delayed fracture (HDF) of hot stamping parts exits, which will decrease the cars passive safety.A solution has been presented to reduce the sensitivity of HDF and improve hydrogen-induced delayed fracture resistance (HDFR)by Niobium micro-alloying technology.Traditional press-hardening steel 22MnB5 and new steel22MnBNb2, 22MnBNb5 and 22MnBNb7 were studied, and it is shown that the appropriate addition of Nb is beneficial to the improvement of the delayed fracture resistance of the hot stamping steel, which indicates that Niobium micro-alloying technology is an effective solution to the HDF in hot stamping steels.
Hot stamping Hot press forming Hydrogen induced delayed cracking Niobium microalloying Safety Solutions
Hongzhou Lu Shiqi Zhang Bian Jian Hardy Mohrbacher Aimin Guo
CITIC Metal Co.,Ltd.,Beijing 100004,China;The School of Resources and Environmental Engineering,East College of Mechanical Engineering,Yangtze University,Jingzhou 434023,China;School of Materials Scien Niobium Tech Asia,068898 Singapore NiobelCon bvba,2970 Schilde,Belgium CITIC Metal Co.,Ltd.,Beijing 100004,China
国际会议
2014 International Conference on Hot Stamping of UHSS(2014高强度钢热冲压成形国际会议)
重庆
英文
89-93
2014-08-21（万方平台首次上网日期，不代表论文的发表时间）