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高氮马氏体不锈钢以其高硬度、高耐蚀性能顺应了刀剪材料的发展要求。利用Gleeble-1500热模拟试验机,在900~1050℃范围,0.05~0.5 s-1应变速率条件下,对高氮马氏体不锈钢3Cr13N进行了高温轴向压缩试验,测得了钢的高温流变曲线。结果表明,该钢流变应力(或峰值应力σp)和峰值应变εp随着变形温度T的升高和应变速率ε的降低而减小,而且,ln[sinh(0.012σp)]与lnε、ln[sinh(0.012σp)]与T-1都近似成直线关系。由此计算出该钢的动态再结晶激活能为443.45 kJ·mol-1,并确立了该钢的热变形方程。
High nitrogen martensitic stainless steel with its high hardness, high corrosion resistance conforms to the development of cutting materials. High-temperature axial compression tests were carried out on high-martensitic stainless steel 3Cr13N at a strain rate of 0.05-0.5 s-1 using a Gleeble-1500 thermal simulator in the temperature range of 900-1050 ℃. The high-temperature rheological properties of the steel curve. The results show that the flow stress (or the peak stress σp) and the peak strain εp decrease with the increase of the deformation temperature T and the decrease of the strain rate ε, and ln [sinh (0.012σp)] and ln ε, ln [sinh (0.012σp)] are approximately linear with T-1. From this, the dynamic recrystallization activation energy of the steel was calculated to be 443.45 kJ · mol-1, and the thermal deformation equation of the steel was established.