A preparation method for improving the coordination rheological ability of fine-grained layer and coarse-grained layer of copper alloy with gradient structure

Abstract

A preparation method for improving the coordinated rheological ability of a gradient structure copper alloy fine-grained layer and a coarse-grained layer. The cast-rolled gradient-structured copper alloy sheet is subjected to solution quenching; the solution-quenched sheet is placed in fine sand ‑80℃~‑105℃ container, store for more than 15 minutes; take out the sheet, and quickly blow off the sand on the surface with high-pressure cold air at ‑80℃~‑105℃; roll the sheet with the surface blown clean , the rolling pass reduction rate is controlled at 10% to 15%; repeat in turn until the entire rolling reduction rate reaches 70% to 95%. The coordinated deformation ability of the coarse and fine grain layers of the gradient structure copper alloy strip prepared by the method of the invention is obviously improved, and no cracking occurs, so that the processing and forming performance is better, and the production is more efficient. The present invention is suitable for various series of gradient structure copper alloy materials, can greatly improve the forming effect of gradient structure copper alloy materials, and this technology can greatly promote the more extensive application of gradient structure copper alloy materials in various industries.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a preparation method for improving the coordinated rheological ability of a gradient structure copper alloy fine-grain layer and a coarse-grain layer. Background technique [0002] Gradient structure materials not only have high strength, but also have good plastic deformation ability. In recent years, more and more scholars have done a lot of research on the preparation methods of gradient structure metal materials. As the most widely used high-efficiency processing method for preparing metal sheets and strips, rolling is also used by more and more scholars to prepare gradient structure materials. However, in the case of a large reduction, due to the weak coordinated rheological ability of the coarse-grained layer and the fine-grained layer of the gradient-structured metal strip material, the sheet is extremely prone to cracking of the coarse-grain...

AI Technical Summary

Problems solved by technology

However, in the process of large plastic deformation, it is easy to break the middle fine-grained layer and coarse-grained layer.

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