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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.

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