Mechanical Properties of Carbon Migration Zone of Dissimilar Steel Welded Joints after Heating

Influence of heating temperature and time on the thickness of carbonized layer and the mechanical properties of carbon migration zone for dissimilar steel welded joints were investigated.The mathematical models of carbonized layer thickness(h),tensile strength(σ_b),impact toughness (α_KU) and bending angle(α) to heating temperature(Τ) and time(t) were created by means of nonlinear regressive analysis method.Theoretical analysis agreed with the experimental results.With the increased of heating temperature and time,h increased while σ_b,α_KU and α decreased.