摘要
利用扫描电镜、能谱仪、金相显微镜、拉伸试验机和摆锤冲击试验机等研究了800-1100℃模拟水火校正对EH36船板的显微组织和力学性能的影响。结果表明：800-850℃热处理，主要析出粒状贝氏体，900℃时出现了马氏体，热处理温度高于1000℃时为单一的马氏体组织，并随温度的持续升高，马氏体晶粒越大；经热处理后EH36船板的强度提高，翅性和韧性下降，热处理温度过高会导致拉伸强度过高断裂伸长率过低，而过低或过高的热处理温度都会导致冲击韧度过低，不能满足CCS规范要求，合适的水火校正温度为850-900℃。
The effects of heat-treatment temperature between 800℃ and 1100 ℃ on the microstructure and mechanical properties of EH36 ship plate were investigated by SEM, EDS, OM, electronic universal material tester and metallic pendulum-type impact tester. The results indicate that the granular bainite precipitates from 800 ℃ to 850 ℃, martensite precipitates at 900 ℃, single martensite phase precipitates when heat-treatment temperature is above 1000 ℃ and the grain size increases accordingly with the heat-treatment temperature increasing. The elongation and impact toughness decrease while strength increases after heat-treatment. The over-temperature of heat-treatment leads to higher tensile strength and lower elongation and higher or lower heat-treatment temperature leads to lower impact toughness, which can＇t meet the requirements of CCS standard. The appropriate fire and water rectification temperature is from 850 ℃ to 900 ℃.
出处
《热加工工艺》
CSCD
北大核心
2014年第4期166-168,172,共4页
Hot Working Technology
基金
国家质检总局科技计划项目(2012QK083)
关键词
EH36钢
水火校正
显微组织
力学性能
EH36 ship plate
fire and water rectification
microstructure
mechanical properties
