A508-3核电大锻件用钢连续冷却贝氏体的相变塑性  

Bainitic transformation plasticity during continuous cooling process of A508-3 steel used for large nuclear power forgings

作　　者：刘飞 韩利战[1] 顾剑锋[1] 潘健生[1] 

机构地区：[1]上海市激光制造与材料改性重点实验室,上海交通大学材料科学与工程学院,上海200240

出　　处：《材料热处理学报》2013年第2期32-36,共5页Transactions of Materials and Heat Treatment

基　　金：基金项目:国家重点基础研究发展计划(“973”计划)(2011CB012904);工信部“高档数控机床与基础制造装备”重大专项(2012ZX04012011)

摘　　要：用Gleeble-3500热模拟试验机研究了A508-3钢在单轴压应力下的连续贝氏体相变诱发的相变塑性。借助于从膨胀曲线分离相变塑性应变的数据处理方法,获得了压应力对贝氏体相变塑性的影响规律。结果表明:基于Greenwood-Johnson模型的贝氏体相变塑性参数K随着外加压应力的增大而增大,并且相变塑性应变占总应变的比重显著增加。相变塑性应变随贝氏体相变进行逐渐增大,增速先快后慢。Transformation plasticity induced by continuous bainitic transformation in A508-3 steel with different applied compressive loads was investigated using a Gleeble 3500 thermal simulator. The effects of compressive stress on bainite transformation plasticity had been obtained with the aid of data processing method by which the transformation plasticity strain can be extracted from dilatometric curves. The results show that the transformation plasticity parameter K based on Greenwood-Johnson model increases with the increasing of the applied compressive loads, and the percentage of transformation plasticity strain in total strain dramatically rises as well. Transformation plasticity gradually augments during the process of bainitic transformation with a decreasing rate.

关 键 词：A508-3钢 贝氏体相变 相变塑性 

分 类 号：TG111.5[金属学及工艺—物理冶金]