Method for manufacturing super strong steel body

Abstract

The present invention relates to a method for manufacturing a super strong steel body, more specifically, to the method for manufacturing a super strong steel body suitable for the processing of products with complicated shapes and deep casting depths. The present invention comprises: a sheet preparation step for blanking a steel sheet with curing ability in a certain shape and cutting the steel sheet; a cold forming step for cold pressing the steel sheet and forming the steel sheet with 50-80% the thickness of the height of the end product; a trimming step for precisely cutting the cold formed product along the outline of the finished goods; and a hot forming and cooling step for simultaneously hot press forming the trimmed goods with 20-50% the thickness of the height of the end product and cooling the trimmed goods from the heated state after heating the trimmed goods over 700 DEG C for austenitization.

Description

technical field [0001] The invention relates to a method for manufacturing an ultra-high-strength steel green body, in particular to a method for manufacturing an ultra-high-strength steel green body suitable for producing products with complex shapes and deep processing depths. Background technique [0002] In recent years, requirements for crash performance aimed at protecting the safety of passengers have become increasingly stringent. At the same time, as regulations on carbon dioxide emissions, a major cause of global warming, become more stringent, the need to improve fuel efficiency is becoming more urgent. For this reason, it is necessary to simultaneously satisfy the requirements of sufficient vehicle strength and reduction of vehicle weight. [0003] If ultra-high-strength steel is used, thinner steel can be used to achieve the required strength. [0004] The process of using ultra-high-strength steel plates to manufacture auto parts is as follows: First, the ste...

AI Technical Summary

Problems solved by technology

However, when cutting with a laser or water jet, although the cut part is very neat and of high quality, it takes a long time for the cutting process depending on the thickness of the material, the length to be cut, the accuracy of dimensional tolerances, etc.

Therefore, the cutting process may sometimes cause delays in the entire manufacturing process

[0010] In addition, if the processing depth of the product is deep or the shape of the product is relatively complex, the change in thermoforming is too large, which will lead to local damage or defects of the product

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