关键词: 不同组织, 残余应力, 焊接接头, 氢扩散, 有限元分析

Abstract: Hydrogen diffusion coefficients in weld metal, heat affected zone (HAZ) and base metal of the 16MnR steel weldment are determined by using electrochemical permeation technique. A 3D sequential coupling calculating method on hydrogen diffusion is developed based on the finite element code-ABAQUS. The effects of welding residual stress and microstructure on the hydrogen diffusion are taken into account. The hydrogen concentration versus time is obtained. The hydrogen concentration accumulation and welding residual stress is much larger in weld metal and HAZ, which will increase the cracking probability related to the hydrogen under the stress.

Key words: Different microstructure, Finite element analysis, Hydrogen diffusion, Residual stress, Weldment