FEM calculation and effect of diffusion hydrogen distribution in the fusion zone of super-high strength steel

摘要: Abstract The distribution of diffusion hydrogen in the welding zone super-high strength steel is calculated by using finite element method (FEM). program calculation worked out. In program, effects heat input (E), temperature and surface-escaping coefficient etc., are taken into account. Microstructure crack morphology fusion effect on analyzed. Crack originated propagated parallel to interface or turned weld metal. Hydrogen accumulates seriously near zone, particularly at root zone. This one importance reasons produce test results analysis indicate that should be controlled about E=16.0 kJ/cm prevent producing propagating for HQ130 steel.