The invention discloses a
laser tailor-welded high-strength steel warm forming preparation method. The
laser tailor-welded high-strength steel warm forming preparation method is characterized by comprising the following steps: manufacturing a 22MnB5 steel plate and a medium
manganese steel plate into a steel part for later use; carrying out
laser tailor-welded connection treatment; carrying out heating treatment on the steel part for later use, which is subjected to laser tailor-
welding; transferring the steel part onto a
stamping mold to carry out
stamping forming and
quenching; finally obtaining a two-phase or three-phase
microstructure formed by lots of ferrite,
martensite or
bainite in the 22MnB5 steel area of the tailor-welded steel part; and obtaining a
martensite organization structure in the medium
manganese steel area, thereby forming a warm forming technology of the laser tailor-welded high-strength steel, which has no need for
coating treatment in advance and has gradient distributed
mechanical property. The laser tailor-welded high-strength steel warm forming preparation method has the beneficial effects that the process combination of laser tailor-
welding and the warm forming technology is realized; the warming forming technology is used for enabling 22MnB5 steel to form the two-phase or three-phase
microstructure; the two-phase or three-phase
microstructure is matched with medium
manganese steel having martensitic structure in the end to obtain a custom-made warm forming part with gradient distributed performances; the technological process is simplified; and the production efficiency is improved.