Research and practice of on-line solution and annealing process for hot strip of austenitic stainless steel
For traditional production process,the hot strip of austenitic stainless steel must be treated with off-line solution and annealing process before being delivered to the downstream user,which has a long production cycle and large energy consump-tion.On-line solution and annealing process can make full use of residual heat of hot strip after rolling for heat treatment,which has great advantages of energy saving and environmental protection.The key control techniques of on-line solution and annealing for hot strip of austenitic stainless steel were introduced.Based on 1 780 mm hot rolling line of GuangQing Metal Technology Co.,Ltd.,the industrial experiment of on-line solution and annealing was carried out.The hot rolled coil covered with"black skin"was obtained from the industrial experiment as raw material,and then was cold rolled after direct pickling without off-line solution and annealing treatment.The mechanical properties,resistance of intergranular corrosion and surface quality of the product were not significantly different from that of cold rolled coil produced with the conventional process,the feasibility of using the on-line heat treatment process instead of off-line solution and annealing process to produce high surface grade stainless steel cold rolled coil was fully proved.
on-line solution and annealingaustenitic stainless steelmechanical propertiesintergranular corrosion resistancesurface qualityenergy conservation and emission reductioncost reduction
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