文献类型：会议论文

英文题名：Research on Hardness for Low-Alloy Steel after Fire Damage

作者：Wang, Chen[1];Chen, Jin[1];Wang, Yinpei[1]

机构：[1]E China Univ Sci & Technol, Sch Mech Engn, Minist Educ, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

会议论文集：4th International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM)

会议日期：AUG 23-24, 2014

会议地点：Shenzhen, PEOPLES R CHINA

语种：英文

外文关键词：12MnNiVR; Material Degradation; Low-Alloy Steel; Fire Damage

摘要：In chemical processing plants and petroleum refineries, the pressure vessels and pipelines suffered often from fire accidents and thus resulted in the metal materials were in overheating state. Elevated temperature could cause the changes in metallographic structure and have unfavorable effects on material mechanical properties. In order to understand better the influence laws of overheating on metallographic structures and material mechanical properties, the methods of theoretical analysis and experimental research were used and the effects of thermal exposure temperature, duration time and cooling rate on microstructure and mechanical properties of low-alloy steel 12MnNiVR, were studied systematically. In the paper, mechanical testing (hardness test) are carried out to understand changes in the mechanical properties that would be observed in the metal exposed to elevated temperatures during a fire accident. The study can provide basis data for the material properties database of metal material suffered from fire accident, and afford technical supports in the key technologies on fire damage FFS (Fitness-For-Service) integrity assessment.