Manufacturing method of hot stamping piece with manganese-containing coating in surface

Abstract

The invention discloses a manufacturing method of a hot stamping piece with a manganese-containing coating in the surface. The manufacturing method comprises the following steps of obtaining a steel blank with a first coating made of a first metallic material; arranging a second metallic material on the surface of the first coating to form a second coating, wherein the second metallic material ismanganese or a manganese containing alloy; and placing the steel blank into oxygen-free atmosphere environment having a first temperature range, performing austenitizing heating and hot stamping shaping and processing to obtain the hot stamping piece with the manganese-containing coating in the surface, wherein the melting point of the first metallic material is lower than the minimum value of thefirst temperature range, and the melting point of the second metallic material is higher than the maximum value of the first temperature range. Through the adoption of the manufacturing method disclosed by the invention, the problems that in the austenitizing heating process that an aluminium silicon coating plate and a hot-dip zinc plate are adopted for hot stamping production, the coating is subjected to liquefaction, the heating rate is low, and after alloying is performed, the corrosion-resistant performance is reduced, can be solved, the production tempo is accelerated, the service lifeof ceramic rollers in the heating furnace is prolonged, and the corrosion resistance of the produced parts is improved.

Description

technical field [0001] The invention relates to the field of thermoforming, in particular to a method for manufacturing a hot stamping part with a manganese-containing coating on the surface. Background technique [0002] The ultra-high-strength steel hot forming stamping process is a process in which a steel plate blank of a certain material is austenitized and heated, then quickly moved to a water-cooled mold for pressing, and then quenched and quenched in the mold to form martensite. [0003] In order to prevent the bare steel blanks from being scaled when heated, coated steel sheets are often used as raw materials for hot stamping. The coatings of these coated steel sheets are generally aluminum-silicon alloy coatings, galvanized alloy coatings, and aluminum-zinc alloy coatings. , aluminum-zinc-magnesium alloy coating or zinc-magnesium alloy coating, etc. These aluminum-based or zinc-based metal materials are all low melting point metals or alloys. Correspondingly, the m...

AI Technical Summary

Problems solved by technology

[0011] 3. In order to reduce coating cracks, the slow heating of the coating near its melting point will slow down the production cycle;