Method used for manufacturing steel part with aluminum-silicon coating

Abstract

The invention discloses a method used for manufacturing a steel part with an aluminum-silicon coating. The method comprises the steps that two steel plates are fixed to a clamp; under the protective atmosphere, a laser galvanometer is adopted for irradiating the abut-joint position of the two steel plates, the abut-joint position is melted and solidified, and a high-quality welding seam is formed;and the welded steel plates are subjected to hot stamping, and the steel part with the aluminum-silicon coating is obtained. The two steel plates at least comprise one aluminum-silicon coating steelplate, the protective atmosphere contains 5 to 100 vol% oxidizing gas, the microscopic structure of the laser welding seam and the welding seam after hot stamping is lath martensite, the method used for manufacturing the steel part with the aluminum-silicon coating solves the problem that an existing aluminum-silicon coating hot forming steel welding joint is poor in toughness, the steel part withthe same mass with that of a steel part in an existing method can be obtained, and the part can be used for manufacturing of a car white body, various structure parts with aluminum-plated steel plates as raw materials and the like.

Description

technical field [0001] The invention relates to the technical field of auto parts manufacturing, in particular to a method for manufacturing a steel part with an aluminum-silicon coating, especially a safety structural part for an automobile. Background technique [0002] At present, with the rapid development of the automobile industry, how to reduce vehicle fuel consumption is a matter of great concern to all automobile companies and consumers. An effective way to reduce energy consumption is to reduce the weight of the vehicle body. On the one hand, it saves energy, and on the other hand, it can improve the mobility and carrying capacity of the vehicle. Therefore, all OEMs attach great importance to the lightweight work of vehicles. One of the most effective ways to realize the lightweight of automobiles is to use high-strength steel. Press-harden steel (PHS) is currently one of the steels with the highest strength for automobile body-in-white, and its tensile strength c...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for manufacturing steel parts with aluminum-silicon coating. At the same time, compared with the existing method, the production cost is reduced, the production efficiency is improved, the process window is wider, and the control accuracy requirement in the welding process is reduced, which is more conducive to industrial scale production

Images