Ultra-high strength steel auto part thermoforming process

Abstract

The invention discloses an ultra-high strength steel auto part thermoforming process. The ultra-high strength steel auto part thermoforming process comprises the following steps that a blank materialis placed in a medium-frequency induction furnace and heated; a stamping die is preheated, and the blank material is placed in the die for stamping; a press machine is pressure-maintained, and until parts in the die are cooled to 180-200 DEG C, the press machine drives an upper die to move upward; the blank material is taken out and naturally cooled to below 50 DEG C at the room temperature; the blank material is placed in electrolyte for electrochemical deburring and descaling; carburization and nitriding are performed; and the blank material is taken out, and post-processing is performed toobtain final auto parts. The ultra-high strength steel auto part thermoforming process realizes stamping of the auto parts by hot stamping method, and can effectively solve the problem of stamping cracks, thereby improving the product qualification rate; and by performing carburization and nitriding, the surface hardness and wear resistance of the parts can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of automatic processing, and in particular relates to a thermoforming process of ultra-high-strength steel auto parts. Background technique [0002] With the development of the world's steel industry, high-strength and ultra-high-strength steel plates have attracted more and more attention from automobile manufacturers in various countries. However, at present, major automobile factories in the world are using the original cold stamping method to manufacture car bodies and parts. Because high-strength steel plates have high strength, the force required for cold stamping is very large, and there are cracks and rebounds are very obvious. These two defects are particularly prominent when stamping high-strength steel plates with a tensile strength greater than 550 MPa (ultra-high-strength steel plates greater than 700 MPa). The hot forming process uses the physical and chemical properties of the material to sta...

AI Technical Summary

Problems solved by technology

However, at present, major automobile factories in the world are using the original cold stamping method to manufacture car bodies and parts. Because high-strength steel plates have high strength, the force required for cold stamping is very large, and there are cracks and springbacks are very obvious, especially for anti-corrosion. These two defects are particularly prominent when stamping high-strength steel plates with a tensile strength greater than 550 MPa (ultra-high-strength steel plates greater than 700 MPa).