模拟热镀锌的退火对冷拔珠光体钢丝组织和扭转性能的影响  

Effect of Annealing of Simulating Hot Galvanizing on Microstructure and Torsion Property of Cold-drawn Pearlitic Steel Wires

作　　者：苏红艳 SU Hongyan(School of Architectural Design and Engineering, Hebi Vocational and Technical College, Hebi Henan 458030, China)

机构地区：[1]鹤壁职业技术学院建筑设计与工程学院,河南鹤壁458030

出　　处：《上海金属》2021年第3期66-70,76,共6页Shanghai Metals

基　　金：国家重点研发计划(No.2017YFB0304800)。

摘　　要：通过退火模拟冷拔珠光体钢丝的热镀锌过程,研究了加热过程中冷拔钢丝组织和性能的变化。并通过对退火后的冷拔钢丝进行预应力处理,确定了其扭转性能恶化的原因。结果表明:冷拔钢丝450℃加热后表层与心部的组织差异是造成其扭转性能恶化的主要原因,该组织差异表现为片状渗碳体溶解后铁素体中碳原子钉扎位错、细小碳化物重新析出。通过预应力处理减弱了碳原子对位错的钉扎作用,钢丝的扭转性能大幅度提高。Annealing process was used to simulate the hot galvanizing process of cold-drawn pearlitic steel wire,and change in microstructure and properties of cold-drawn steel wires during heating process was studied.The reason for the deterioration of torsion property of the cold-drawn steel wire after annealing was determined by prestressing treatment.The results showed that the difference in microstructure between the surface layer and the core of the cold-drawn steel wires heated at 450℃resulted in the deterioration of its torsion property.The difference in microstructure was that after the dissolution of lamellar cementite,the dislocations were pinned by carbon atoms in ferrite,and the fine carbides precipitated again.The prestressing treatment reduced the effect of carbon atoms pinning dislocations,and the torsion property of steel wires was greatly improved.

关 键 词：珠光体钢丝 冷拔 退火 扭转性能 预应力处理 

分 类 号：TG142.1[一般工业技术—材料科学与工程]