低碳钢压缩变形时的形变不均匀性及其对铁素体转变的影响  

Deformation inhomogeneity and its influence on ferrite transformation in compressed low carbon steels

作　　者：杨平[1] 高鹏[1] 崔凤娥[1] 孙祖庆[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]新金属材料国家重点实验室,北京100083

出　　处：《塑性工程学报》2004年第3期15-21,共7页Journal of Plasticity Engineering

基　　金：国家重点基础研究课题 (No G19980 6 15 0 6 );教育部‘高等学校骨干教师资助计划’资助

摘　　要：宏观的形变不均匀性会导致相变和再结晶的差异 ,从而造成最终组织和性能的变化。本文观察并测量了单向压缩的低碳钢形变强化相变、铁素体热、冷形变时样品中心与边缘的铁素体形貌、珠光体或渗碳体分布和织构的差异。分析了不同区域相变及再结晶时的组织演变特点。讨论了形变储存能、渗碳体粒子及形变温度对铁素体相变及再结晶的影响。Deformation inhomogeneity in macro-scale leads to the difference in transformation and/or recrystallization, and therefore, the change in final microstructures and properties. In this paper the morphologies of deformed ferrite grains, the distribution of deformed pearlite/cementite particles and the textures in the side region and in the center of compressed low carbon steels are investigated and determined during deformation-enhanced transformation, warm and cold compression. The microstructure evolutions during transformation and recrystallization in different regions are analyzed. Results are discussed in terms of the influences of deformation stored energy, cementite particle and deformation temperature.

关 键 词：低碳钢 变形 形变强化相变 织构 再结晶 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]