Austenitic stainless steel belt for control rod driving mechanism magnetism isolation piece and preparation method of austenitic stainless steel belt

Abstract

The invention discloses a preparation method of an austenitic stainless steel belt for a control rod driving mechanism magnetism isolation piece. The preparation method comprises the following procedures of conducting alloy smelting and casting, so that a cast ingot is obtained; conducting chemical analysis on the cast ingot; conducting forging heating and forging on the cast ingot, so that a forging stock is obtained; conducting heating and hot rolling on the forging stock, so that a hot rolled plate is obtained; conducting cold rolling on the hot rolled plate, so that an intermediate cold rolled plate is obtained; conducting intermediate annealing, final cold rolling and solution treatment on the cold rolled plate, so that final products are obtained; and conducting performance inspection on the final products, packaging and warehousing qualified products, and conducting delivery. After alloy casting, forging, hot rolling and intermediate annealing are completed, magnetic inspection is implemented on the cast ingot, the forging stock, the hot rolled plate and the cold rolled plate in the intermediate annealing state through a magnetic nondestructive inspection method. In addition, the invention further discloses an austenitic stainless steel belt material, prepared through the preparation method, for the control rod driving mechanism magnetism isolation piece.

Description

technical field [0001] The invention belongs to the field of materials. More specifically, the invention relates to an austenitic stainless steel strip material for a magnetic isolation sheet of a control rod drive mechanism and a preparation method thereof, which can be applied to occasions with very strict requirements on weak magnetic properties. Background technique [0002] The PWR control rod drive mechanism is an important mechanical part of the nuclear power plant reactor system. It drives the control rod assembly to move up and down in the core through the electromagnetic force generated by the change of the excitation coil current, and maintains and changes the height of the control rod assembly in the core. In this way, the reactor can realize functions such as power regulation, power maintenance, normal shutdown and emergency shutdown. The PWR control rod drive mechanism is a nuclear safety level 1 component and a specification level 1 component, and is a key com...

AI Technical Summary

Problems solved by technology

In the production process of the existing technology, the magnetic detection is not carried out until the final cold-rolled sheet is solution treated to obtain the final product. Once the magnetic properties are found to be unqualified, there is no way to remedy it, so it is difficult to ensure that the products meet the requirements of weak magnetic properties.

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