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以12%Cr铁素体不锈钢为研究对象,研究了不同退火方式、退火工艺对12%Cr铁素体不锈钢热轧板和冷轧板组织、力学性能、耐腐蚀性能、成形性能的影响。结果显示,12%Cr铁素体不锈钢高温下存在铁素体—奥氏体相变过程,在双相区退火快冷后有马氏体组织生成。通过在热退过程中引入奥氏体相变和马氏体相变,可以显著细化最终产品晶粒,提高最终冷轧产品的强度、硬度,同时保持材料耐腐蚀性能不变。该工艺生产的产品可以适用于高强度的应用场合,打破了传统12%Cr铁素体不锈钢热轧后只能采用罩式炉退火的束缚,针对产品的最终用途可以采用不同的退火方式和退火工艺进行生产。
Taking 12% Cr ferritic stainless steel as the research object, the effects of different annealing methods and annealing processes on the microstructure, mechanical properties, corrosion resistance and formability of 12% Cr ferritic stainless steel were studied. The results show that there is ferrite-austenite transformation in 12% Cr ferritic stainless steel at high temperature, and martensite formation occurs after the dual-phase annealing is rapidly cooled. By introducing austenite transformation and martensitic transformation during thermal annealing, the final product grains can be significantly refined to increase the strength and hardness of the final cold rolled product while maintaining the material’s corrosion resistance. The process products can be applied to high-strength applications, breaking the traditional 12% Cr ferritic stainless steel can only be used after the annealing furnace hood annealing for the end-use products can use different annealing methods and annealing Process for production.