Preparation method capable of improving coordinated rheological capacity of fine grain layer and coarse grain layer of gradient structure copper alloy

Abstract

The invention discloses a preparation method capable of improving the coordinated rheological capacity of a fine grain layer and a coarse grain layer of a gradient structure copper alloy. A cast-rolled gradient structure copper alloy plate is subjected to solid-solution quenching; a solid-solution-quenched plate is stored in a container which is in the temperature of -80 DEG C to -105 DEG C and isfilled with fine sand, and the storing time is 15 minutes or above; the plate is taken out, and the surface sand particles are fast blown away completely through high-pressure cold air of -80 DEG C to -105 DEG C; the plate of which the surface is blown completely is rolled, and the rolling-pass reduction ratio is controlled to be 10%-15%; and repeated operation is performed in sequence till the whole rolling reduction ratio reaches 70%-95%. The coordinated rheological capacity of the fine grain layer and the coarse grain layer of a gradient structure copper alloy strip prepared through the method is improved remarkably, cracking does not occur any more, the machining forming property is better, and production is more efficient. The preparation method is suitable for all series of gradientstructure copper alloy materials at present, the forming effect of the gradient structure copper alloy materials can be improved to a great degree, and the technology can greatly promote wider application of the gradient structure copper alloy materials to all industries.

Description

Technical field [0001] The invention belongs to the technical field of metal material processing, and particularly relates to a preparation method for improving the coordinated rheology of a gradient structure copper alloy fine-crystalline layer and a coarse-crystalline layer. Background technique [0002] The gradient structure material not only has high strength, but also has good plastic deformation ability. In recent years, more and more scholars have conducted a lot of research on the preparation methods of gradient structure metal materials. Rolling is the most widely used high-efficiency processing method for preparing metal sheets and strips, and it 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 coordination rheological ability of the coarse-grained layer and the fine-grained layer of the gradient structure metal belt material, the sheet material is extremely prone to cracking of ...

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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