022Cr钢的热变形行为及热加工图

用Gleeble 3180热模拟试验机对022Cr钢的热变形行为进行研究,揭示了变形抗力与变形程度、变形温度和应变速率的关系。在950~1200 ℃温度范围和应变速率为0.001~5 s^-1下进行热压缩,并利用动态材料模型(DMM)建立了022Cr钢热变形的工艺图。结果表明,随着变形温度的升高和应变速率的降低,022Cr钢的流动应力降低。根据流动应力曲线数据计算其变形激活能为381.615 kJ/mol。当应变不小于0.5时,022Cr钢热加工的最佳变形条件有两个区域,第一个区域在温度范围1100~1200 ℃,应变速率范围0.001~0.01 s^-1内,第二个区域在温度范围1130~1180 ℃,应变速率范围1~5 s^-1内,其功耗效率都能达到0.4以上。

Hot deformation behavior and processing maps of 022Cr steel

Hot deformation behavior of the 022Cr steel was studied by a Gleeble 3180 thermal simulation test machine, and the relationship between deformation resistance and deformation degree, deformation temperature and strain rate was revealed. The thermal compression was performed at temperature in range of 950-1200 ℃ and at strain rate in range of 0.001-5 s^-1, and a dynamic deformation model of the 022Cr steel was established by using a dynamic material model (DMM). The results show that as the deformation temperature increases and the strain rate decreases, the flow stress of the 022Cr steel decreases. The deformation activation energy calculated from the data of the flow stress curve is 381.615 kJ/mol. When the strain is not less than 0.5, the optimal deformation conditions of the 022Cr steel for hot working have two regions. The first region is in the temperature range of 1100-1200 ℃, the strain rate is in the range of 0.001-0.01 s^-1, and the second region is in the temperature range of 1130-1180 ℃, strain rate range of 1-5 s^-1, its power consumption efficiency can reach more than 0.4.