Study on Welding Deformation Numerical Simulation for Ultrahigh Strength Steel BS960E

摘要

Now days there are more and more customers using high-strength steel and ultra-high-strength steel. Upon the steel sales expanding, welding deformation control is one of the most challenges encountered in its application. In this paper, the welding deformation of ultra-high strength steel BS960E is studied by means of welding numerical simulation. The results are as shown as following. 1) The solid-state phase transformation occurring in HAZ of ultra-high strength steel has a significant impact on the prediction of welding deformation. The reason is that Bainite and Martensite phase transformation have a great impact on the welding deformation during the welding process. 2) The proportion of Martensite and Bainite phase transformation in the HAZ of the ultra-high strength steel BS960E has little influence on its welding deformation. The model of welding deformation of ultra high strength steel based on solid-state phase transformation improves the prediction accuracy greatly.