Heat-affected zone width estimation method for welded parts and welding method using this estimation method

摘要

To provide a method for estimation of a heat-affected zone width of a weld part by which a width of a heat-affected zone width of a weld part can be easily estimated.SOLUTION: According to this method, each bead width of a front face and a rear face of a weld part of a metallic component is measured, a shape coefficient is calculated on the basis of each measured bead width of the front face and the rear face and a plate thickness of the metallic component, and when the calculated shape coefficient falls within a prescribed range (value of 0.05 to 0.15), a HAZ width Wat a center of the plate thickness of the metallic component is estimated on the basis of a constant correlation relationship (approximation straight line) between a shape coefficient F and the HAZ width W.SELECTED DRAWING: Figure 3