Nickel base alloy electroslag band-electrode surfacing technology

Abstract

The invention discloses a nickel base alloy electroslag band-electrode surfacing technology. With the technology, not only can the surfacing effect be improved, but also the surfacing quality can be guaranteed. The technology includes the following steps that plates are machined, and welding bands are manufactured; the faces to be welded are cleaned before being subjected to surfacing till the metal luster shows, the surfaces of the faces to be welded are subjected to 100 percent magnetic powder or penetration testing, a transition layer is subjected to surfacing after I-level qualification is achieved, 100 percent penetration testing is performed on the surface of the transition layer, multiple layers are subjected to surfacing after I-level qualification is achieved, and 100 percent penetration testing is performed on the surfaces of the multiple layers. Compared with submerged arc band-electrode surfacing, the penetration depth of a welding bead is smaller, the dilution rate is lower, and generation of chemical components and hot cracks of surfacing metal is guaranteed; the submerged arc band-electrode surfacing is changed into electroslag band-electrode surfacing, and therefore not only are welding input amount and the dilution rate of base metal reduced, but also the deposition efficiency is improved.

Description

technical field [0001] The invention relates to a nickel-base alloy electroslag strip surfacing process. Background technique [0002] Due to the unstable rolling level of domestic nickel-based alloy sheets, small sheet specifications, and frequent defects, and the high price of foreign nickel-based alloy sheets, nickel-based alloy composite sheets are often used for surfacing. The commonly used nickel-based alloy surfacing process in China is to select small-sized welding strips and use submerged arc surfacing welding. Although the surfacing efficiency is improved by using submerged arc strip level surfacing welding, there are the following problems: ① Due to the high nickel content , It is easy to produce thermal cracks during welding; ② In order to reduce the welding heat input, the domestic welding strip specification is only 30*0.5mm; ③ The welding strip purchase cycle is long. Contents of the invention [0003] In order to solve the above problems, the present inven...

AI Technical Summary

Problems solved by technology

The commonly used nickel-based alloy surfacing process in China is to select small-sized welding strips and use submerged arc surfacing welding. Although the surfacing efficiency is improved by using submerged arc strip level surfacing welding, there are the following problems: ① Due to the high nickel content , thermal cracks are easy to occur during welding; ② In order to reduce the welding heat input, the domestic welding strip specification is only 30*0.5mm; ③ The welding strip purchase cycle is long

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