Super304H钢拉伸流变特性的研究  

Study on the Flow Properties of Steel Super304H under Thermal Tension

作　　者：李冬升[1] 戴起勋[1] 程晓农[1] 陶亚平[2] 高佩[2] 刘瑜[2] 

机构地区：[1]江苏大学材料科学与工程学院,镇江212013 [2]江苏银环精密钢管股份有限公司,宜兴214203

出　　处：《材料导报》2011年第16期91-93,98,共4页Materials Reports

基　　金：江苏省科技成果转化项目(BA2010053);镇江市科技支撑项目(GY2009004);大学学生科研项目(08A126)

摘　　要：采用电液式万能试验机测试了奥氏体不锈钢Super304H在20～600℃、不同应变率下的流变应力和应变的关系。实验结果表明,应变速率和变形温度的变化强烈地影响Super304H钢的流变应力,在高温下出现明显的动态软化。根据得到的流变应力曲线,拟合出了JC模型和其修正的JC模型中的相关参数。经与实验对比验证,修正的JC本构模型能够很好地描述Super304H钢的动态力学性能,为生产工艺的制定和钢管质量的控制提供了重要的材料参数。To determine the true flow stress-strain relationship of austenitic stainless steel Nuper304H , specimens were tested with electric universal testing machine from room temperature to 600℃. The results show that the flow stress is influenced by both strain rate and deformation temperature, and the flow stress decreases with the increase of temperature. The parameters for a Johnson-Cook constitutive equation were determined from the test results. The comparison between data of experimental and fitted constitutive equation indicates that the constitutive equation is suitable for expressing the dynamic behavior of Super304H steel, which provides important material characteristic parameters for the development of production technology and quality control of steel pipe.

关 键 词：SUPER304H 流变应力 高应变速率 本构模型 

分 类 号：TG142.1[一般工业技术—材料科学与工程]