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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900~1 150℃5、~50 s-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1 100~1 150℃,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263.4 kJ/mol,Z参数能较好地描述该钢种的流变行为。
The hot deformation behavior of 00Cr23Ni4N duplex stainless steel was investigated by Gleeble-3800 thermomechanical simulator. The thermal deformation behavior of 00Cr23Ni4N duplex stainless steel was studied at 900-1 150 ℃ 5 and 50 s-1, and the Sellars hyperbolic sine model was established The relationship between peak flow stress and Zener-Hollomon (Z-parameter). The results show that the high temperature flow stress of 00Cr23Ni4N duplex stainless steel decreases evidently with the increase of the deformation temperature and the strain rate decreases obviously. When the deformation temperature is 1 100 ~ 1 150 ℃, the materials exhibit good hot workability; Regression analysis shows that the stress index of 00Cr23Ni4N duplex stainless steel is 2.6 and the thermal deformation activation energy is 263.4 kJ / mol. The Z parameter can well describe the rheological behavior of the steel.