Method of manufacturing reactor member by using the surface...

Details Method of manufacturing reactor member by using the surface... Method of manufacturing reactor member by using the surface...

2005-01-25

2008-12-02

Yee, Deborah (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S908000, C376S900000

Reexamination Certificate

active

07459037

ABSTRACT:
A method of surface-treating a reactor member for effectively removing a Cr-deficient layer and a work-hardened layer considered to be a cause of stress corrosion cracking (SCC) under low-stress conditions. The method of surface-treating a reactor member which is worked by bending (step1) and then processed by a heat treatment (step2), in which a work-hardened layer is formed by the bending, and in which a Cr-deficient layer is formed due to an oxide film attached by the heat treatment, uses at least one of: acid wash; grinding; electrolytic polishing; electro-discharge machining; surface cutting; surface deoxidation and softening; wet blasting; laser machining; or surface plating (step3) to remove the work-hardened layer and the Cr-deficient layer from the reactor member or to prevent contact of the work-hardened layer and the Cr-deficient layer of the reactor member with a primary coolant.

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