A surface modification method of large-size titanium alloy plate

By using high-power laser equipment and vacuum stress-relief annealing, the problem of surface remelting modification of large-size titanium alloy plates was solved, achieving a surface modification effect with high hardness and low wear, which is suitable for industrial mass production.

CN118848445BActive Publication Date: 2026-05-29LUOYANG SUNRUI TI PRECISION CASTING
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
LUOYANG SUNRUI TI PRECISION CASTING
Filing Date
2024-08-16
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies make it difficult to effectively modify large-size titanium alloy plates through laser surface remelting, resulting in thin coatings and weak adhesion, which makes them unsuitable for applications in fields such as friction transmission and biomedicine.

Method used

After welding the titanium plate and back plate with high-power laser equipment, the surface is remelted, combined with vacuum stress-relief annealing and leveling treatment to form a reinforced layer with a thickness of not less than 0.5 mm, which improves hardness and reduces surface wear.

Benefits of technology

It achieves a surface hardness increase of no less than 80% and a surface wear rate reduction of 50% for large-size titanium alloy plates, making it suitable for industrial mass production.

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Abstract

The application provides a surface modification method of large-size titanium alloy plate, adopts a high-power laser device, and prepares a large-size industrial-grade laser surface remelting modified titanium alloy plate with a thickness T 钛板 = 3-25 mm, a width W1≀1200 mm and a length L1≀1200 mm by reasonably regulating processing parameters; the prepared plate has a large remelting layer depth, and the thickness is not less than 0.5 mm, and the hardness is high, and the Vickers hardness is increased by not less than 80 compared with the matrix; the industrial production commonly used device and process method are adopted, the process is short, the process control is simple, the production efficiency is high, and batch production can be realized.
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