近年来,随着结构及工程机械(如履带式推土机、岩层推土机等)逐渐增加,所用的环境日益恶劣,要求使用的钢板具有超高强度和良好的韧性。为满足这些要求,日本JFE公司开发了两种超高强度钢:JFE- In recent years, as the structure and construction machinery (such as track-type tractors, rock-bottom tractors, etc.) have been gradually increasing, the environment used is becoming increasingly harsh, and the steel sheets required to be used have extremely high strength and good toughness. To meet these requirements, JFE Japan has developed two types of ultra-high strength steel: JFE-