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超纯21%Cr铁素体不锈钢的热变形行为研究
  • 期刊名称：钢铁研究学报，2010，22(12)：30-35.
  • 时间：0
  • 分类：TG142[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819
  • 相关基金：国家自然科学基金资助项目（50734002）
  • 相关项目：超纯铁素体不锈钢微合金化机理
关键词： 铁素体不锈钢, 变形抗力, 数学模型, 晶内剪切带, ferritic stainless steel, deformation resistance, mathematical modeling, in-grain shear band
中文摘要：

采用热力模拟试验机对超纯21%Cr铁素体不锈钢进行了单道次压缩试验。研究了在650~1 000℃范围内铁素体不锈钢的热变形行为,确定了流变应力、变形温度和变形速率之间的关系及组织演变规律,并建立了变形抗力数学模型。结果表明,超纯铁素体不锈钢在试验温度范围内的热变形软化机制以动态回复为主。在800℃以下变形时,铁素体晶粒内部出现剪切变形带。随着温度的降低和压下量的增加试样中亚晶粒得到细化,位错密度增加。

英文摘要：

Single compression tests were carried out for an ultra purified 21%Cr ferritic stainless steel（FSS） with a thermo-mechanical simulator.The hot deformation behavior of the experimental steel was investigated in the temperatures range from 650 to 1000℃.The relationship for the flow stress with deformation temperature and strain rate was determined.The microstructure evolution was studied and the mathematic modeling of deformation resistance was established.The results showed that dynamic recovery acted as the main softening mechanism during deformation.In-grain shear bands were formed in the specimens hot compressed below 800℃.With decreasing the deformed temperature and increasing the reduction,the sub-grains were subdivided further and the dislocation density increased.

同期刊论文项目
超纯铁素体不锈钢微合金化机理
期刊论文 101 会议论文 12
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