High alloy dissimilar steel and high alloy steel welding method

Abstract

The invention particularly discloses high alloy dissimilar steel and a high alloy steel welding method. The high alloy steel welding method comprises the steps that a piece of water soluble paper is arranged on two welded junctions in the same direction respectively for plugging; an argon filling pipe is used for filling argon in a first welded junction, welding of a priming layer, a filling layer and a cover surface layer of a second welded junction is carried out, and 1cm is reserved when welding priming of the second welded junction is carried out; after surface covering is carried out on the cover surface layer of the second welded junction, argon filling is carried out on the reserved position when priming is carried out on the second welded junction, then the first welded junction is welded, welding of a priming layer, a filling layer and a cover surface layer of the first welded junction is carried out, and 1cm is reserved on the welding priming layer of the first welded junction; after surface covering is carried out on the cover surface layer of the first welded junction, sealing welding is carried out on the reserved portion when priming is carried out on the second welded junction, and after sealing welding of the second welded junction is finished, argon filling and sealing welding are carried out on the reserved position when priming is carried out on the first welded junction finally.

Description

technical field [0001] The invention specifically discloses a high-alloy dissimilar steel and a high-alloy steel welding method. Background technique [0002] In the process of welding high-alloy dissimilar steels and high-alloy steels, the heat input generally needs to be strictly controlled. The greater the welding heat input, the more the base metal is integrated into the weld, the greater the fusion ratio, and the wider the heat-affected zone. It is easy to cause a decarburization layer near the weld fusion line on the welded steel side, and the weld grains are coarse, which is unfavorable to the plasticity and toughness of the welded joint. At the same time, the heat-affected zone increases, and the welding residual stress also increases, which easily leads to cracks. When using conventional welding methods such as figure 1 As shown, each welding port is filled with argon and welded separately with an argon filling tube. As the welding starts, the surroundings of the...

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