加氢反应器用2.25Cr-1Mo-0.25V钢锻件的持久性能  

Endurance property of 2.25Cr-1Mo-0.25V steel forgings for hydrogenation reactor

作　　者：石如星 禹兴胜 元亚莎 何春静 陈明 代博杰 Shi Ruxing;Yu Xingsheng;Yuan Yasha;He Chunjing;Chen Ming;Dai Bojie(Luoyang CITIC HIC Casting&Forging Co.,Ltd.,Luoyang Henan 471039,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang Henan 471023,China;CITIC Heavy Industries Co.,Ltd.,Luoyang Henan 471039,China)

机构地区：[1]洛阳中重铸锻有限责任公司,河南洛阳471039 [2]河南科技大学材料科学与工程学院,河南洛阳471023 [3]中信重工机械股份有限公司,河南洛阳471039

出　　处：《金属热处理》2021年第4期182-186,共5页Heat Treatment of Metals

摘　　要：研究了高温持久对2.25Cr-1Mo-0.25V钢断口及显微组织的影响。对热处理态试样的常温、高温及相同温度、不同载荷下的高温持久强度进行分析,并通过扫描电镜(SEM)对持久试样的断口及微观组织进行观察。结果表明,随着加载应力的增加,持久时间显著降低,持久试样断裂后,断口形貌的韧窝中有富Mo析出相,且随着持久断裂时间的延长,析出相中Mo元素含量逐渐增多。Effects of high temperature endurance on fracture and microstructure of 2.25Cr-1Mo-0.25V steel were researched.Normal temperature tensile strength,high temperature tensile strength and high-temperature endurance strength under same temperature and different loading of the as-heat treated specimens were analyzed.The fracture and microstructure of the specimens were observed by means of scanning electron microscope(SEM).The results show that with the increase of the loading stress,the endurance time decreases significantly.After fracture,rich-Mo phases are precipitated in the fracture,and with the increase of the fracture time,the content of Mo in the precipitated phase increases gradually.

关 键 词：2.25CR-1MO-0.25V钢 持久试验 显微组织 断口形貌 富Mo 

分 类 号：TG113[金属学及工艺—物理冶金]