Rolling method of pipeline steel and stainless steel composite plate

Abstract

The invention discloses a rolling method of pipeline steel and a stainless steel composite plate. The rolling method comprises the step of a heating step, a rolling step, a cold control step, a straightening step and a stack cooling step. According to the rolling method, the rolling process is adjusted and researched, the low-temperature long heat preservation and heating process is adopted, a high-temperature low-speed high-pressure pressing process is adopted at the roughing rolling stage, the uniformity of the tissue of the steel plate before the cold control is guaranteed by controlling the thickness of an intermediate blank and controlling the finish rolling starting temperature, final rolling temperature, the pressing rate in the step before the final rolling and the like at the finish rolling stage, the particle size is relatively small, and the formation of the final steel plate needle-shaped ferritic structure is guaranteed by adopting a given cooling speed and controlling the start cooling temperature and the return red temperature by virtue of the cooling control process, so that the indexes of mechanical properties of the steel plate can be guaranteed.

Description

technical field [0001] The invention belongs to the field of metal clad steel plate production, and in particular relates to a rolling method of pipeline steel and stainless steel clad plate. Background technique [0002] At present, the main production methods of known metal composite materials include metal explosive processing method, hot rolling composite method and cold rolling composite method. Due to the large environmental pollution and low production efficiency of the explosive cladding method, cold rolling cladding can only produce thin plates. Therefore, the present invention mainly uses the rolling cladding method to produce clad plates. At present, the hot rolling cladding method can ensure the production of low-grade substrates such as general carbon steel. The performance is qualified, but it is difficult to guarantee the performance requirements for pipeline steel that requires DWTT performance. Contents of the invention [0003] In view of the above probl...

AI Technical Summary

Problems solved by technology

Due to the large environmental pollution and low production efficiency of the explosive cladding method, cold rolling cladding can only produce thin plates. Therefore, the present invention mainly uses the rolling cladding method to produce clad plates. At present, the hot rolling cladding method can ensure the production of low-grade substrates such as general carbon steel. The performance is qualified, but it is difficult to guarantee the performance requirements for pipeline steel that requires DWTT performance