S30432钢出现马氏体组织时的力学性能试验研究
发布时间：2018-07-20 18:31
【摘要】：为评估S30432钢组织中出现马氏体时其长期服役安全性,利用XRD、SEM、TEM、拉伸试验机、冲击试验机和维氏硬度试验机等仪器,对组织中存在马氏体的S30432钢进行了力学性能及其断裂模式的试验研究。结果表明:在19 000 h服役时间内,马氏体组织引起了或加剧了S30432钢室温抗拉强度和硬度在析出相强化基础上的进一步升高和服役室温脆化;受马氏体组织影响,室温下S30432钢的拉伸冲击断裂模式为沿着存在马氏体组织的紧邻晶界区域断裂,而非沿着晶界析出相的沿晶韧窝断裂,高温下S30432钢为穿晶韧窝断裂。
[Abstract]:In order to evaluate the long-term service safety of martensite in steel S30432, the instruments such as XRDX SEMTEM, tensile tester, impact tester and Vickers hardness tester were used. The mechanical properties and fracture modes of S30432 steel with martensite in the microstructure were studied. The results show that during the service time of 19 000 h, the martensite structure causes or intensifies the further increase of the tensile strength and hardness of S30432 steel on the basis of precipitation strengthening and the embrittlement of service room temperature, which is affected by the martensite structure. The tensile impact fracture mode of S30432 steel at room temperature is along the grain boundary zone with the presence of martensite structure, but not along the intergranular dimple fracture along the precipitated phase at grain boundary. At high temperature, the fracture pattern of S30432 steel is transcrystalline dimple fracture.
【作者单位】： 西安热工研究院有限公司;广东大唐国际潮州发电公司;西安交通大学;
【分类号】：TG142.1
本文编号：2134386
[Abstract]:In order to evaluate the long-term service safety of martensite in steel S30432, the instruments such as XRDX SEMTEM, tensile tester, impact tester and Vickers hardness tester were used. The mechanical properties and fracture modes of S30432 steel with martensite in the microstructure were studied. The results show that during the service time of 19 000 h, the martensite structure causes or intensifies the further increase of the tensile strength and hardness of S30432 steel on the basis of precipitation strengthening and the embrittlement of service room temperature, which is affected by the martensite structure. The tensile impact fracture mode of S30432 steel at room temperature is along the grain boundary zone with the presence of martensite structure, but not along the intergranular dimple fracture along the precipitated phase at grain boundary. At high temperature, the fracture pattern of S30432 steel is transcrystalline dimple fracture.
【作者单位】： 西安热工研究院有限公司;广东大唐国际潮州发电公司;西安交通大学;
【分类号】：TG142.1
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