Q235钢C方式等径弯曲通道变形及组织研究  

Equal Channel Angular Pressing with Route C of Q235 Steel and Its Microstructure

作　　者：赵西成[1] 王媛[2] 王经涛[3] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]北京有色金属研究总院,北京100088 [3]南京理工大学材料系,江苏南京210094

出　　处：《热加工工艺》2005年第1期5-7,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(59974018);陕西省自然科学研究计划资助项目(2002E111);陕西省教育厅专项基金资助项目(03JK134)

摘　　要：在室温下对Q235钢成功进行了C方式11道次等径弯曲通道,等效应变约高达11,获得了亚微晶铁素体组织。组织观察表明,第1道次组织细化效果最显著,随后道次的主要作用是增加晶粒的位相差,使大角度晶界的比例随变形道次增加而增加。在本实验条件下,由于珠光体组织中的渗碳体表现出较强的塑性变形能力,使得珠光体组织具有与铁素体类似的宏观塑性变形行为,并且在等效应变约高达11的情况下,珠光体组织中未发现微观裂纹。Q235 steel is successfully processed by equal channel angular pressing up to a total of 11 passes via route C at room temperature, and the submicrometer grained ferrite microstructure is obtained. The microstructural examination shows that grain refinement at the first pass is the most significant;the subsequent passes increase mainly the orientation difference between sub-grains, and a proportion of high angle boundaries increase with increasing the pass number. Under the macroscopic present ECAP condition, the plastic deformation behavior of pearlite is similar to that of ferrite due to considerable plastic deformation capability of cementite in pearlitic, and the micro-cracks are not observed in the pearlitic structure.

关 键 词：等通道转角挤压 碳钢 亚微晶组织 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG376.3[金属学及工艺—金属材料]