材料期刊网，材料期刊，材料类期刊，材料期刊投稿

According to the research on the deformation resistance and the ferrite transformation behavior of X80 pipeline steel by using Gleeble-3500 thermal simulator, a mathematical model of the α-phase start transformation temperature for high-Nb pipeline steel was established, based on the transformation kinetics and thermodynamics. The influence of deformation and cooling rate as well as Nb content on the α-phase starting temperature was thoroughly investigated. The results given by the model were in good agreement with the experimental results, which showed that the model could predict the α-phase starting temperature for high-Nb pipeline steel during cooling process.

关键词: high-Nb pipeline steel , hot deformation , deformation resistance , cooling rate , ferrite transformation temperature

超低碳13Cr-5Ni-2Mo马氏体不锈钢热变形行为及本构关系

张威，闫东娜，邹德宁，刘环，韩英，范光伟

钢铁

利用Gleeble-3800热模拟试验机对超低碳13Cr-5Ni-2Mo马氏体不锈钢进行单道次高温压缩试验，研究其在900～1 200 ℃、0.1～50 s-1条件下的热变形行为，并讨论了不同变形条件下的微观组织演变规律；基于Sellars双曲正弦模型构建了超低碳13Cr-5Ni-2Mo 马氏体不锈钢的高温流变应力本构方程。研究结果表明，变形温度越高、应变速率越低，则流变应力越小，峰值应变也越小，微观组织由动态回复型向动态再结晶型转变，并且晶粒逐渐长大、粗化。在高温区变形，随着应变速率的升高，动态再结晶晶粒明显细化。所建立的本构方程具有较高的精确度，能反映超低碳13Cr-5Ni-2Mo 马氏体不锈钢的高温变形力学行为，可为热加工数值模拟研究提供参考。

关键词: 超低碳 , carbon martensitic stainless steel , hot deformation , constitutive equation

高应变率下00Cr23Ni4N双相不锈钢的热变形行为

张威 , 李国平

钢铁

采用Gleeble-3800热力学模拟试验机对00Cr23Ni4N双相不锈钢进行了高温压缩试验，研究了其在900～1150℃、5～50s-1条件下的热变形行为，并利用Sellars双曲正弦模型建立了峰值流变应力与Zener-Hollomon（Z参数）之间的关系。研究结果表明，00Cr23Ni4N双相不锈钢的高温流变应力随变形温度的升高、应变速率的减小显著降低；在变形温度为1100～1150℃，材料均表现出良好的热加工性能；通过回归分析，00Cr23Ni4N双相不锈钢的应力指数为2.6，热变形激活能为263.4kJ/mol，Z参数能较好地描述该钢种的流变行为。

关键词: 00Cr23Ni4N , duplex stainless steel , hot compression , flow stress , hot deformation , activation energy

材料期刊网

Modeling of γ→α Transformation Temperature Ar3 for High-Nb Pipeline Steel During Cooling Process

超低碳13Cr-5Ni-2Mo马氏体不锈钢热变形行为及本构关系

高应变率下00Cr23Ni4N双相不锈钢的热变形行为

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