Thermal treatment splicing process for ultra-high strength steel plate before stamping and device thereof

Abstract

The invention provides a thermal treatment splicing process for an ultra-high strengthen steel plate before stamping and a device thereof. The process comprises the following steps: heating a ultra-high strength steel plate to be formed to austenitizing temperature of the steel plate; fully keeping the steel plate at the austenitizing temperature till the tissue of the steel plate is fully converted into austenite; and then, according to the performance requirement of a part to be formed, performing thermal treatment on different requirement regions of the ultra-high strength steel plate by utilizing different cooling modes. The device comprises two parts with correspondingly up and down compositional structures.; each part at least comprises one of a water fog cooling module, a cooling water copper module, a cooling water steel module, a copper module, a steel module, a gas cooling module, an air cooling module, and a heat insulation annealing module; and all modules are tightly arranged together. The thermal treatment splicing process and the device can ensure that different regions of the same formed plate material have different mechanical properties, so that a splicing plate material of which each part has difference in performance is obtained.

Description

technical field [0001] The invention relates to a heat treatment process and device for high-strength stamping sheets such as high-strength steel, advanced high-strength steel, and ultra-high-strength steel before stamping, and belongs to the technical field of heat treatment and sheet forming. Background technique [0002] With the improvement of steel strength, the elongation and formability of the material are also greatly reduced. During the forming process, problems such as cracking, wrinkling, difficult to control size and poor shape are prone to occur. The traditional cold stamping forming process can no longer meet the development of technology and production. needs. For this reason, scholars from various countries and major automobile companies have focused their work on the application of new materials and new processes while optimizing the automobile frame and structure. At present, there are two forming processes for ultra-high-strength steel plates. One is hot ...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies in the existing ultra-high-strength steel forming process (the special equipment in the hot stamping and in-mold quenching process is expensive, the investment is large, the formed parts have only high strength and no energy absorption, and the laser tailor welding technology exists The weld seam of the tailored welded blank affects the performance and formability of the material, the transition of the material performance of the spliced ​​blank is severe, the special welding laser and its matching optical device are required, and the tailor welding equipment is expensive, etc.), providing a material that can guarantee High strength and energy absorption, material properties without excessive heat treatment and splicing process before stamping ultra-high strength steel plate, this process can make different regions of the same formed sheet have different mechanical properties, and obtain the existence of various properties Differential Heat Treatment Split Sheets

Images