摘要
以高Nb X80管线钢为研究对象,利用金相显微镜、扫描电镜和透射电镜等实验设备对钢中MA岛的尺寸、形貌及分布特征进行了研究和分析.研究结果表明,高Nb X80管线钢热轧后,适当提高冷却速度可使钢中MA岛的形貌和分布更为细小和均匀,高的Nb含量促进了条状MA岛的生成.通过调整高Nb X80管线钢的合金成分和热轧后的冷却速度,均可减少MA岛对钢性能产生的不利影响.
The size and morphology and distribution feature of MA （marttensite and austenite） islands in the high-Nb X80 pipeline steel were investigated and analyzed by the OM（optical microscope）, SEM （scanning electron microscope） and TEM（transmission electron microscope）. MA islands of the high-Nb X80 pipeline steel became more fine and uniform when cooling rate was increased after hot rolled and high- Nb content could promoted formation of the strip morphology MA island. The adverse effects on the high- Nb X80 pipeline steel properties of the MA island could be reduced when the composition and cooling rate were adjusted.
出处
《材料研究与应用》
CAS
2015年第2期120-124,共5页
Materials Research and Application
