Cobalt-based alloy overlay welding process for claws and small holes of connecting rods

Abstract

The invention relates to a cobalt-base alloy build-up welding process used for small holes of claws and connection rods, in particular to the cobalt-base alloy build-up welding process used for the small holes of the claws and the connection rods in the field of small hole metal welding. According to the cobalt-base alloy build-up welding process used for the small holes of the claws and the connection rods, the small holes are machined in a to-be-welded blank, the small holes include the double-faced straight hole and the double-faced conical hole, workpieces needing to be welded are washed and pre-heated before welding, and then build-up welding is conducted through oxy-acetylene flame. The structure of the build-up welding blank is designed into the double-faced straight hole and the double-faced conical hole, the difficulty that due to the narrow build-up welding space, build-up welding cannot be easily conducted can be effectively improved, the phenomena of coarse internal tissue grains and overall overburning of part materials in the build-up welding process can be effectively reduced or avoided, and therefore the success rate of product build-up welding is greatly increased.

Description

technical field [0001] The invention relates to a cobalt-based alloy surfacing process for hook claws and small holes of connecting rods, in particular to a cobalt-based alloy surfacing welding process for hook claws and connecting rod small holes in the field of metal welding for small holes craft. Background technique [0002] The claws and connecting rods used in the driving mechanism of nuclear power control rods are required to be wear-resistant at high temperatures in the working environment. The cost of materials is high and the impact resistance is reduced. If different materials are used to make various parts of the part, and then the various parts are connected together, the performance characteristics of different materials can be fully utilized and the material cost can be significantly reduced. But how to connect parts of different materials together is a problem to be solved by the aforementioned scheme. For conventional structures, welding can be used to sol...

AI Technical Summary

Problems solved by technology

Welding methods can be used to solve the aforementioned problems for conventional structures, but due to the small size of the claws and connecting rods, and the small hole space required for surfacing welding is small, the welding methods and welding parameters of the prior art are difficult to operate and prone to Uneven hardness, prone to welding defects such as pores and cracks, resulting in product scrapping

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