Shear extrusion-rolling compound forming method and device for preparing high-performance plate

Abstract

The invention discloses a shearing extrusion-rolling composite forming method for preparing a high-performance panel. The method comprises the following steps that a shearing extrusion forming device is firstly utilized for repeated shearing forming, and blank grains are refined; then thinning shearing forming is conducted, and a metal panel with a strong shearing texture is prepared; and finally, the surface quality of the panel is improved through rolling deformation, meanwhile, the texture is balanced, and the metal panel forming performance is improved. A die is simple in structure, convenient to operate and low in cost, panel equal-thickness repeated shearing forming and thinning shearing extrusion forming functions can be achieved, a heating device on the device can be adopted for preheat treatment to improve the plastic deformation capability of the panel, a fine grain panel with a strong shearing texture is prepared through the shearing extrusion forming device, finally, panel surface quality improving and texture balancing are achieved through rolling, and the high-performance metal panel with the excellent mechanical performance is prepared. The invention further discloses a shearing extrusion-rolling composite forming device for preparing the high-performance panel.

Description

technical field [0001] The invention belongs to the technical field of processing metal materials, and in particular relates to a shear extrusion-rolling composite forming method and device for preparing high-performance plates. Background technique [0002] With the continuous development of aerospace, national defense, and transportation, the demand for high-strength and high-toughness metal structural materials is increasing, and higher requirements are put forward for its performance. Grain refinement is one of the important methods to prepare high-performance structural materials. The large plastic deformation technology shows that through one or more accumulated and repeated plastic deformations, it can obtain a considerable cumulative strain, refine the grains of the material, and improve the comprehensive mechanical properties of the material. At present, the large plastic deformation technologies mainly include: equal channel extrusion, reciprocating extrusion, hig...

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Problems solved by technology

However, the above-mentioned processes all have some defects and deficiencies in the process of actual metal sheets

For example, it is difficult to produce wide sheets by equal diameter angular extrusion; the surface quality of sheets formed by continuous constrained strip shearing is poor; the equipment for reciprocating extrusion, high-pressure torsion, and cycle closed-die forging is relatively complicated, and it is mostly used for bars and blocks. Material preparation; when the upper and lower work rolls of the rolling mill are staggered and the upper and lower rolls are rolled asymmetrically at different speeds, the plate is prone to slipping, and the quality of the plate is poor; the plate is difficult to pass through the equal-diameter angle extrusion die during the equal-diameter angle rolling of the publication number CN101104236 , and the quality of the plate is relatively poor; the die and method for shear deformation blanking proposed by CN104511493A need to constantly replace punches, the efficiency is not high, and can only be used for bar preparation; the repeated extrusion device proposed by CN203917446U cannot realize a set of The die repeatedly shears and extrudes block materials of different sizes, and cannot achieve thinning shear extrusion of thick plates

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