Processing method of nitrogen-containing austenitic stainless steel

Abstract

The invention relates to the technical field of stainless steel material processing, in particular to a processing method of nitrogen-containing austenitic stainless steel. According to the technical scheme adopted by the invention, the processing method comprises the following steps of: (1) heating a steel billet of the nitrogen-containing austenitic stainless steel to 1100 to 1250 DEG C by a walking beam furnace, preserving heat for 1 to 1.5 hours, and then performing heat-insulating treatment on the steel billet of the nitrogen-containing austenitic stainless steel subjected to heat preservation; and (2) performing rolling by a hole-free flat roll roughing mill unit, wherein in the rolling process, the elongation coefficient of each pass is controlled to be 1.25 to 1.35, the broadening coefficient is controlled to be 0.10 to 0.42, and the operating speed of the steel billet in the rolling process is 0.60 m / s to 1.12 m / s. The processing method has the advantages that by the processing method, the properties such as strength, toughness and corrosion resistance of the produced economical medium-nitrogen austenitic stainless steel can be guaranteed to be more reliable; the use requirements in the wider use environments can be met; and the lower overall cost in the production process is guaranteed.

Description

technical field [0001] The invention relates to the technical field of stainless steel material processing, in particular to a processing method of nitrogen-containing austenitic stainless steel. Background technique [0002] Nitrogen-containing austenitic stainless steel has a ductile-brittle transition phenomenon, and this type of steel has a ductile-brittle transition temperature (DBTT), which is related to the nitrogen content. For this reason, different mass fractions of N, Cr, Mn and other elements determine their different heat treatment processes. The existing heat treatment process and calendering process consume a lot of rolls, and the power consumption is also relatively large, and the efficiency in the processing process is relatively high. The relatively low cost has led to relatively high costs in the overall processing process. Therefore, the improvement of high-yield, high-quality, and low-consumption in the rolling mill in the production process has become a...

AI Technical Summary

Problems solved by technology

For this reason, different mass fractions of N, Cr, Mn and other elements determine their different heat treatment processes. The existing heat treatment process and calendering process consume a lot of rolls, and the power consumption is also relatively large, and the efficiency in the processing process is relatively high. Therefore, the improvement of high-yield, high-quality and low-consumption in the rolling mill in the production process has become a technical problem that must be solved at present.