Large-deformation rolling technology based on asymmetric rolling equipment

Abstract

The invention relates to a large-deformation rolling technology based on asymmetric rolling equipment. According to the large-deformation rolling technology based on the asymmetric rolling equipment,a detachable bottom plate is replaced with a shaping demand bottom plate, a hydraulic adjustment device is adopted to adjust spacing between a roller and the bottom plate, the rolling temperature is adjusted through a roller heating plate and a bottom plate heating device, before rolling, a sample is placed into a sample heating device to be preheated to reach a preset deformation temperature, thesample is pushed into a feeding opening, a transmission unit is driven by a three-phase motor to make the roller rotate, and a gear-rack transmission device makes the roller and the bottom plate linked to complete rolling. By the adoption of the large-deformation rolling technology based on the asymmetric rolling equipment, after rolling, recrystallization and annealing treatment are combined tocarry out synergistic regulation to obtain fine-grain superplastic structure, multi-grade structure structure in which large and small crystal particles are mixed can also be obtained, and the strength and the plasticity are greatly improved at the same time; the grain size of plates is reduced, the texture of rolled plates is weakened, the performance of the rolled plates is improved, through cooperation of the roller and the work bottom plate, different kinds of plates can be prepared, technological processes are reduced, the machining cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a large deformation rolling process based on asymmetric rolling equipment, and belongs to the technical field of rolling. Background technique [0002] Sheet metal materials are widely used in important fields such as vehicles, ships, aerospace, pressure vessels, and marine engineering, and the performance requirements for sheet metal are also continuously improving. For the application of high-toughness alloys, traditional rolling equipment is being continuously improved, such as: equal-diameter angle rolling equipment, ring-shaped asynchronous rolling equipment, stack rolling, and large-ratio differential rolling equipment have emerged as the times require. However, it is difficult to achieve grain refinement and plate texture weakening at the same time through the above-mentioned rolling technology. For example, superfine grain structure can be prepared by superimposed rolling, but the plate texture is very strong, and equal...

AI Technical Summary

Problems solved by technology

However, it is difficult to achieve grain refinement and plate texture weakening at the same time through the above-mentioned rolling technology. For example, superfine grain structure can be prepared by superimposed rolling, but the plate texture is very strong, and equal-angle rolling can significantly weaken the texture. structure, but the effect of grain refinement is not obvious, so it is difficult to simultaneously improve the strength and plasticity of the plate through the above rolling process

At present, only large deformation technologies such as equal-diameter angular extrusion and high-pressure torsion can improve the strength and plasticity of some metal materials at the same time. However, the existing large deformation equipment and its processes are complicated, the production cost is high, and it is limited to the preparation of small-sized samples. , currently mainly used in the laboratory theoretical research stage, it is difficult to achieve large-scale commercial mass production

Images