Preparing method of zirconium alloy hot rolled plate

Abstract

The embodiment of the invention discloses a preparing method of a zirconium alloy hot rolled plate. The method comprises the steps that zirconium alloy casting ingots with the preset size and the preset weight are subjected to heat preservation and then subjected to forging, heat treatment, primary surface treatment, forging after heat preservation, secondary surface treatment, multi-pass hot rolling and vacuum annealing. The manufactured zirconium alloy hot rolled medium and thick plate has the excellent anti-corrosion property and mechanical property, and has the uniform and fine structure,and the plate meets the technical standard requirement of zirconium alloy medium and thick plates for a nuclear reactor. The method is simple in process, flow in preparing flow, and low in productioncost. The situation that domestic high-property zirconium alloy medium and thick plates are dependent on import for a long time can be expected to be changed.

Description

technical field

[0001] The invention belongs to the technical field of metal processing, and in particular relates to a preparation method of a zirconium alloy hot-rolled plate. Background technique

[0002] Zirconium and zirconium alloys are widely used as structural materials for nuclear reactor cores due to their excellent nuclear properties, good comprehensive mechanical properties, good pressure forming properties, welding properties, and high temperature and high pressure water vapor corrosion resistance.

[0003] Most of the zirconium alloy plates produced independently in China are thin plates with a thickness less than or equal to 5mm, and the current production technology is relatively mature. However, for the production of zirconium alloy hot-rolled medium-thick plates with a thickness of 6-12mm, there is a common problem of abnormally coarse grains in the microstructure of the plate, which will cause a sharp decline in the corrosion resistance and mechanical prop...

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