析出物对高强度钢板不同温度回火后性能的影响（英文）  

Effect of precipitates on properties of high strength steel plates after tempering at different temperatures

作　　者：樊艳秋[1] 马长文[1] 李少坡[1] 张海[1] 王海宝[1] FAN Yan-qiu;MA Chang-wen;LI Shao-po;ZHANG Hai;WANG Hai-bao(Shougang Research Institute of Technology, Beijing 100043, China)

机构地区：[1]首钢技术研究院,北京100043

出　　处：《材料热处理学报》2019年第3期120-124,共5页Transactions of Materials and Heat Treatment

摘　　要：采用光学显微镜和拉伸试验机等研究了高强度钢板经500、550、600和650℃回火后的显微组织和力学性能,并利用透射电镜对其析出物(尤其是纳米级ε-Cu析出物)进行了观察。结果表明:试验高强度钢板的显微组织以贝氏体为主;随回火温度的升高,其强度先上升后下降并在600℃达到了峰值,强度的变化主要归因于析出物的不同析出特点;大量弥散、均匀分布的纳米级ε-Cu析出物是试验高强度钢板在600℃回火后具有良好强度和韧性的主要原因。Microstructure and mechanical properties of high strength steel plates after tempering at 500, 550, 600 and 650 ℃ were studied by means of optical microscope and tensile testing machine. The precipitates(especially ε-Cu precipitates) of the high strength steel plates were observed by transmission electron microscope(TEM). The results show that the microstructure of the high strength steel plate is mainly bainite, and with the increase of tempering temperature, its strength increases first, then decreases and reaches its peak value at 600 ℃. The change of the strength is mainly attributed to the different precipitation characteristics of precipitates. A large number of dispersed and uniformly distributed nanoscale ε-Cu precipitates are the main reasons for the good strength and toughness of the high strength steel plates after tempering at 600 ℃.

关 键 词：析出 高强度钢板 温度 

分 类 号：TG142.7[一般工业技术—材料科学与工程]