【摘要】 采用热膨胀法,通过THERMECMASTOR-Z热模拟实验机测试了高碳帘线钢72A(%:0.72C、0.53Mn、0.22Si)的连续冷却转变(CCT)曲线,并分析了开始冷却温度(840～930℃)和冷却速度(0.8～22℃/s)对钢组织的影响。结果表明,相同开始冷却温度条件下,冷却速度越快,相变时间越短;相同冷速条件下,随着开始冷却温度的升高,到达相变开始转变温度的时间和到达转变终了温度的时间会延后;提高开始冷却温度,珠光体的百分含量增加,珠光体片层间距减少,有利于提高线材力学性能。更多还原

【Abstract】 The continuous cooling transformation (CCT) curves of high carbon steel 72A (0.72C,0.53Mn,0.22Si) for tyre core wire has been measured by THERMECMASTOR-Z thermal simulation machine using thermal dilatation meth- od,and the effect of start cooling temperature (840～930℃) and cooling rate (0.8～22℃/s) on structure of steel has been analyzed.Results showed that at same start cooling temperature,with increasing cooling rate,the phase transforma- tion period decreased;at same cooling rate,with increasing start cooling temperature,the time reaching the start and end of phase transformation increased;Increasing start cooling temperature was available to increase pearlite percentage content and decrease interlamellar spacing and enhance mechanical properties of wire.更多还原