A preparation method and product of nuclear power high-temperature nickel-based alloy composite welding wire

A nickel-based alloy, composite welding wire technology, applied in welding equipment, metal processing equipment, welding medium and other directions, can solve the problems of poor molten metal fluidity, affecting the quality of welding seam forming, expensive welding wire, etc., to ensure high temperature plasticity. , The effect of reducing crack sensitivity and low cost
CN111136405BActive Publication Date: 2021-02-23SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2021-02-23

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Abstract

The invention discloses a preparation method of high-temperature nickel-based alloy composite welding wire for nuclear power and its products, belonging to the field of welding technology, comprising the following steps: cleaning the surface of the high-temperature nickel-based alloy welding wire, followed by mechanical grinding, polishing, and alkali cleaning Oil and electropolishing treatment to produce welding wire I; electroplating nickel layer on the surface of welding wire I to produce welding wire II; electroplating TiC coating on the nickel layer of welding wire II to produce welding wire III; electroplating on the TiC coating of welding wire III The nickel layer is used to prepare a nuclear power high-temperature nickel-based alloy composite welding wire; the nuclear power high-temperature nickel-based alloy composite welding wire prepared by the invention has low cost and high DDC crack resistance.
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Description

technical field

[0001] The invention belongs to the field of welding technology, and in particular relates to a preparation method of high-temperature nickel-based alloy composite welding wire for nuclear power plants and a product thereof. Background technique

[0002] Nickel-based superalloy Inconel690 is a key structural material for nuclear power plant core equipment pressure vessels, heat dissipation evaporators, etc. It has excellent high-temperature performance, corrosion resistance, and oxidation resistance. Poor thermal expansion coefficient, poor high temperature fluidity, etc., it is very easy to form coarse columnar crystals during welding, and produce intergranular thermal cracks, especially a microscopic thermal crack of intergranular cracking - high temperature loss of extension cracks ( DDC).

[0003] There are many factors affecting DDC, such as alloy system, precipitated carbides, intergranular elements, degree of tortuosity of grain boundaries, grain boun...

Claims

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