Surface treatment method for pre-rolling crack resistance of large-section titanium alloy square billet

Through the surface treatment method of multi-stage electroplating and heating coordinated treatment, the cracking problem of large-section titanium alloy square billets during the rolling process is solved, the finished product quality and material yield are improved, and the surface defects are reduced.

CN120394558APending Publication Date: 2025-08-01CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
9 Cites 0 Cited by

Patent Information

Application Number
CN202510588331.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-08
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

Large-section titanium alloy square billets are prone to cracking during rolling, and the prior art is difficult to effectively solve, especially in high-speed continuous rolling, which leads to a decrease in finished product quality and low material yield.

Method used

The surface treatment method of multi-stage electroplating and heating coordinated treatment is adopted, including surface pretreatment, first-stage electroplating, stress removal treatment and second-stage electroplating to form a uniform and dense nickel plating layer, combined with pre-rolling heating, reduce the surface temperature drop rate and stress concentration.

Benefits of technology

It significantly reduces the risk of cracking in large-section titanium alloy square billets during the rolling process, improves the quality and material yield of finished products, and reduces the amount of surface scratches and finished products peeling.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a pre-rolling anti-cracking surface treatment method for a large-section titanium alloy square billet, and belongs to the technical field of titanium alloy surface treatment. The method comprises the following steps: S1, sequentially carrying out surface grinding and oil removal treatment on a titanium alloy square billet; s2, the pretreated square billet is subjected to nickel electroplating, and an initial nickel plating layer is formed; s3, the nickel-plated square billet is heated and subjected to heat preservation under the vacuum condition; s4, secondary nickel electroplating is conducted on the square billet after stress relief, and a thickened nickel plating layer is formed; and S5, the secondary nickel-plated square billet is rolled after being subjected to uniform-temperature heating and heat preservation. A uniform and compact nickel plating layer is formed on the surface of the large-section titanium alloy square billet through electroplating, the temperature reduction rate of the surface layer of the square billet after the square billet is discharged from a furnace can be reduced, the temperature gradient between the surface and the interior of the billet is remarkably reduced, and the rolling plasticity of the billet in the rolling starting link is guaranteed; the technical problem that the large-section titanium alloy square billet is prone to cracking in the rolling process can be effectively solved.
Need to check novelty before this filing date? Find Prior Art