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主要由铁素体和岛状马氏体组成的双相钢,因其具有优良的成型性和较高的强度已引起人们广泛的注意。近十余年,对这类钢的组织和性能间的关系作了大量研究,并确定了力学性能(如抗拉强度)与组织构成(如马氏体的体积分数、马氏体中含碳量等)有一些定量关系,但尚未涉及矫顽力H_c这个参量。本文报道临界区退火和低温回火工艺对双相钢H_c影响的实验结果。试验用钢为1.2mm厚的09MnNb冷轧板,化学成分(wt-%)为
Duplex steel, mainly composed of ferrite and island martensite, has drawn wide attention due to its excellent formability and high strength. In the recent ten years, a great deal of research has been done on the relationship between the microstructure and properties of this type of steel. The mechanical properties (such as tensile strength) and the organization (such as volume fraction of martensite, carbon content in martensite Volume, etc.) have some quantitative relationship, but has not yet involved coercive force H_c this parameter. This paper reports the experimental results of the influence of critical zone annealing and low temperature tempering on the H_c of duplex steel. Test steel is 1.2mm thick 09MnNb cold-rolled plate, the chemical composition (wt-%) is