V微合金化对高级别帘线钢组织及冷拉性能的影响.pdfVIP

V 微合金化对高级别帘线钢组织与冷拉性能的影响 1 1, 2 1 1 彧 1 1 王洪利 刘宏玉 周 鹏 费 阳 黄 陈 浩 （1.武汉科技大学 理学院，武汉 430065 ； 2.冶金工业过程系统科学湖北省重点实验室，武汉 430065 ） 摘 要 为了减轻高级别帘线钢晶界渗碳体（GBC ）的析出、提高其强度和冷拉性能，研究了V 微合金化80、90 级帘线钢的显微组织及性能变化规律。用光学显微镜（OM ）及扫描电镜（SEM）观测了V 微合金化试样的显微组 织形貌、GBC 析出、珠光体团及片间距；用力学实验机测量了热加工及冷拉拔后的力学性能。结果表明：V 微合 金化可细化珠光体团和片间距，提高索氏体率；改善GBC 的形貌和分布，降低其连续性；提高帘线钢的强度、塑 性及冷拔加工硬化率，改善钢的综合性能。1 关键词 帘线钢 V GBC 显微组织 冷拉性能 The Influence of V Micro-alloying on the Microstructure and Cold Drawing Properties of High-grade Tire Cord Steels Wang Hongli1 Liu Hongyu 1, 2 Zhou Peng 1 Fei Yang1 Huang Yu 1 Chen Hao1 （1. College of Science, Wuhan University of Science and Technology, Wuhan, 430065; 2. Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan, 430065 ） Abstract The law of microstructures and properties of 80 and 90-grade tire cord steels with V micro-alloying were investigated in this paper, in order to alleviate the precipitation of grain boundary cementite (GBC) and enhance their strengths and cold drawing properties. The microstructure, precipitation of GBC, the colony and interlamellar spacing of pearlite of specimens with V micro-alloying were observed and measured using optical microscope (OM) and electron scanning microscope (SEM); the mechanical properties after hot working and cold drawing were measured by means of mechanical testing machines. It was shown that V micro-alloying can decrease the colony size, interlamellar spacing of pearlite and increase the volume fraction of sorbite; modify the morpholog