一种具有优化组织和优异性能的超高碳钢  

A Ultrahigh-carbon Steel with Optimized Microstructure and Excellent Mechanical Properties

作　　者：林一坚[1] 罗光敏[2] 史海生[3] 章靖国[1] 

机构地区：[1]上海市金属功能材料重点实验室,上海200092 [2]上海交通大学材料科学与工程学院,上海200030 [3]宝钢研究院前沿技术研究所,上海201900

出　　处：《钢铁》2005年第11期57-61,共5页Iron and Steel

摘　　要：研究了超高碳钢不同组织结构与其力学性能之间的关系,分析了珠光体和球化组织各自的优点和缺点,并提出将这两种组织结合起来,进行优化组合的创新性的思路。研发了一种具有特别结构的超高碳钢,其晶内为细密珠光体,晶界邻区为球化组织。这种材料同时兼有珠光体所能提供的高强度和球化组织所能提供的高塑性,达到了抗拉强度1 300 MPa,伸长率18%的优异综合力学性能。The relation between microstructure and mechanical properties of ultrahigh-carbon steel（UHCS） was studied. The advantages and disadvantages of spheroidized structure and lamellar pearlite were analyzed. A new idea was developed that the microstructure of UHCS can be optimized by properly combining spheroidized-structure and pearlite. A new UHCS was also developed which possesses a unique microstructure characterized by fine pearlite in grains and spheroidized-structure near grain boundaries. And thus, this steel has both high strength from pearlite and high ductility from spheroidized structure, and excellent Rm（1300 MPa） and A （18%） can be obtained.

关 键 词：超高碳钢 显微组织 力学性能 

分 类 号：TG142.31[一般工业技术—材料科学与工程]