Weldability analysis of A387 Grade 12 steel plate and other alloying elements The main alloying element of chromium and molybdenum is pearlitic heat-resistant steel, which can significantly improve the high temperature strength and high temperature oxidation resistance of A387 Grade 12 steel plate.
However, the poor weldability of the A387 Grade 12 steel plate makes the weld and the heat-affected zone high. The quenched martensite structure is prone to hard and brittle welding, and then cools in the air. It not only affects the mechanics of the welded joint of the A387 Grade 12 steel plate. Performance, and there is a tendency to produce internal stress and cold cracks.
Therefore, the main problem of welding A387 Grade 12 steel plate is cracks. Cracks are mainly affected by structure, stress and hydrogen content in the welding. Therefore, it is particularly important to formulate a reasonable A387 Grade 12 steel plate welding process.
