0 前言 将高碳珠光体钢进行拉拔加工强化而得到的高碳钢丝(钢琴钢丝),在大批量生产的钢种中,也是强度最高的材料。近年来正向高强度化方向发展。例如,作为轮胎增强材料而采用的钢丝线,当初的强度为2800MPa,通过夹杂物控制技术、中心偏析控制技术,八十年代末已提高到3400MPa,并正在研制达到4000MPa的钢丝线材。1500～1600MPa级的桥梁用镀锌钢丝已用了长达半个多世纪,而以世界最大的明石海峡大桥的建设为契机开发出了1800MPa的钢丝, 0 Introduction High-carbon steel wire (piano wire) obtained by drawing and processing high-carbon pearlite steel is also the highest strength material in mass-produced steel grades. In recent years, the direction of high-intensity development. For example, the steel wire used as a tire reinforcing material has an initial strength of 2800 MPa. Through the inclusion control technology and the center segregation control technique, the wire rod has been increased to 3400 MPa at the end of the 1980s and is being developed to 4000 MPa. 1500 ~ 1600MPa grade bridge galvanized steel wire has been used for more than half a century, but the construction of the world’s largest Akashi Kai Bridge as an opportunity to develop a 1800MPa steel wire,