15CrMo Alloy Welding Technology

15CrMo alloy welding technology,15CrMo steel plates, 15CrMo alloy steel plates
15CrMo alloy has high oxidation resistance and high temperature strength and excellent heat resistance under high temperature conditions. It is a pearlitic heat-resistant steel. Its alloy elements are mainly chromium and molybdenum. 15CrMo alloy steel plate is widely used in the manufacture of boilers, steam turbines, power machinery and industry. Parts and heat pipes operating at high temperatures in industrial sectors such as furnaces and petrochemicals.

15CrMo Alloy Welding Technology:

(1) Strictly control the content of alloying elements such as Mn and Si in the base metal and welding consumables;
(2) Select welding data with higher plasticity than the base metal;
(3) Properly improve the preheating temperature and the temperature between the layers;
(4) Select small line energy, constrain the width of the superheated zone, according to coarsen the grain;
(5) Minimizing the holding time of the reheat crack temperature sensitive temperature interval during the heat treatment;
(6) Reasonably design the joint method to reduce the structural restraint. Welding electrode technology arc welding welding operation skills: bottom welding special attention to the size and shape of the molten pool, the thickness of the molten pool should be controlled in 5~6mm, the shape is elliptical, the moving speed should be uniform; the surface of the weld should be as smooth as possible Easy to remove slag, reduce the amount of grinding of the convex weld, very good control of the continuous moment of the base welding, reduce the occurrence of weld defects; the weld should be ground into a gentle slope before the joint, at the joint The front end ignites the arc and pulls back to the joint for normal welding, which prevents the occurrence of pores and slag inclusions in the welded joint.
Argon-rich welding operation skills: Pay special attention to the arc voltage and welding speed control during argon-rich welding. The key is to keep the arc length basically unchanged during the welding process. The dry elongation is 10~15mm, the gas is mixed with argon gas and carbon dioxide, the left welding method is used for welding, and the welding power source is DC reverse connection.
 

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