摘要
成功地实现了珠光体钢65Mn的等径弯曲通道变形(ECAP),并研究在650℃不同ECAP变形道次的条件下渗碳体球化的演化过程.结果表明,渗碳体在ECAP热变形过程中表现出明显的加速球化特征.第一道次ECAP热变形后,片状的渗碳体演化为细小碎块的聚集体;第二道次热变形后,渗碳体实质上已破碎,呈现出颗粒状和球化渗碳体的主要形貌特征;第五道次ECAP热变形后,进一步演化为超细的球状渗碳体均匀分布于超细晶铁素体基体的组织.
The spheroidization behavior of cementite in pearlitic steel during equal channel angular pressing (ECAP) hot deformation at 650℃ was studied ,and the results show that the lameUae cementite evolved to be congeries of fine cementite particles after the first pass; spherical particles of cementite was formed after the 2nd pass; ultrafine spherical cementite particles distributed uniformly in the ultrafine grained ferrite matrix after the 5th pass of ECAP.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2006年第1期25-27,56,共4页
Materials Science and Technology
基金
国家自然科学基金资助项目(59974018)
关键词
等径弯曲通道变形
超细晶材料
渗碳体
equal channel angular pressing
ultrafine- grained materials
cementite