杨巍峰1，钱庆生2, *，杨小芹3（1.中亿丰建设集团股份有限公司，江苏 苏州 215131；2.盈锋紧固系统(无锡)有限公司，江苏 无锡 214000；3.无锡轻大建筑设计研究院有限公司，江苏 无锡 214000）
摘要：在980 °C 的熔融黄铜中对0.92%C 钢丝(直径1.8 mm)热浸镀黄铜(45 ± 5) s。对比了热浸镀黄铜钢丝和电镀黄铜钢丝的组成、微观组织和冷拉性能。结果表明，热浸镀黄铜层的厚度为3 ~ 5 μm，以α 相为主，呈均匀的伪共析珠光体，珠光体片层间距、抗拉强度幅差和断面收缩率幅差均小于电镀黄铜钢丝，冷拉性能也更优。对热浸镀黄铜钢丝进行24 道次拉拔而获得的直径为0.3 mm 的单丝具有镀层厚度均匀，力学性能、扭转性能稳定的优点，以其捻制的钢帘线粘合性能优异。
文章编号：1004 – 227X (2019) 07 – 0305 – 06
Microstructure and mechanical properties of hot-dip brass-plated steel wire for fabrication of steel cord// YANG Wei-feng, QIAN Qing-sheng*, YANG Xiao-qin
Abstract: The 0.92%C steel wire with a diameter of 1.8 mm was plated with brass by being dipped in molten brass at 980 °C for 40-50 s. The composition, microstructure, and cold drawability of the hot-dip brass-plated steel wire were compared with the brass-electroplated one. The results showed that the hot-dip plated brass coating was 3-5 μm thick and hads microstructure dominated with α-phase, and uniformly distributed with pseudo-eutectoid pearlite. The hot-dip brass-plated steel wire had lower interlamellar spacing of pearlite, less variation in tensile strength and sectional shrinkage, and better cold drawability as compared with the brass-electroplated one. The monofilament with a diameter of 0.3 mm obtained from the hot-dip brass-plated steel wire by a 24-pass drawing had uniform coating thickness and stable mechanical and torsional properties. The twisted steel cord obtained therewith showed excellent adhesion performance.
Keywords: steel cord; brass; hot-dip plating; electroplating; microstructure; mechanical property; adhesion force
First-author’s address: Zhongyifeng Construction Group Co., Ltd., Suzhou 215131, China