Metal material large-strain processing method based on multi-pair wheel rolling and equal channel corner extrusion

Abstract

The invention discloses a metal material large-strain processing method based on multi-pair wheel rolling and equal channel corner extrusion. The metal material large-strain processing method is characterized by comprising the following steps: firstly, blanks passes through multiple pairs of rolling wheels driven by power, and the gap between each pair of rolling wheels is adjusted so that the blanks reaches the designed thickness after being rolled by multiple pairs of rolling wheels; secondly, equal channel corner extrusion dies are installed at the outlets of the last pair of rolling wheels so that the blanks reaching the designed thickness through the rolling of the rolling wheels are continuously sheared and deformed under the drive of the last pair of rolling wheels and the extrusion of the dies and then are extruded out of the dies after turning an angle of 45 to 90 degrees in the original heading direction. The invention integrates the advantages of a multi-pair wheel rollingtechnique and an equal channel corner extrusion technique, is especially suitable for the large-strain deformation processing of thin plates, and can realize energy-saving, high-efficiency, continuousand uniform large-strain deformation processing of metal materials.

Description

technical field [0001] The invention relates to a cold working method for metal materials, in particular to a large-strain processing method for obtaining high-performance materials by using cold extrusion and strong deformation, in particular to a method based on multi-pair rolling and equal channel angular extrusion Large strain machining method for metal materials. Background technique [0002] As we all know, the amount of strain is an important parameter that determines the microstructure and properties of metal materials after deformation processing. By applying strong plastic deformation to metal materials, that is, large-strain deformation processing, it has become one of the important means to improve material structure, improve material properties and prepare high-performance new materials. [0003] At present, the technologies for realizing large strain deformation processing of metal materials mainly include multi-pair rolling technology and equal channel angula...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the rolling deformation of the current multiple pairs of wheels is small, it is difficult to realize the equivalent large strain of the cross-section and the control degree of the texture orientation of the deformed material is small, and the continuous production of the equal-channel angular extrusion is difficult and cannot be industrialized. To solve the problem, design a method that combines the characteristics of the two. First, use multiple pairs of wheels to deform the bad material to the designed thickness, and then use the good dynamic performance of multiple pairs of wheels to continuously send the rolled billet into the equal-channel angular extrusion die. A processing method for large strain processing and continuous output of finished metal materials, that is, a large strain processing method for metal materials based on multi-pair rolling and equal channel angular extrusion

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