热压缩法研究TiC形变诱导析出动力学
发布时间：2018-10-22 13:23
【摘要】：为了阐明低成本钛微合金化钢在奥氏体区热轧过程中的析出行为,在Gleeble-1500D热模拟试验机上采用热压缩应力松弛法、双道次变形法和透射电镜(TEM)研究了0.047C-0.109Ti微合金钢中的形变诱导析出动力学。通过分析应力松弛曲线、软化动力学曲线及不同等温时间析出相的数量和尺寸分别获得了3组析出-时间-温度(PTT)曲线。结果表明,3种方法获得的PTT曲线均呈现"C"形,且鼻子点温度均为900℃左右。在析出开始时间(Ps)的测量方面,双道次变形法展现出最高的敏感性和可靠性。TEM结果表明,形变诱导析出相为纯的Ti C粒子,在复型膜上呈现链状或胞状分布。此外,析出相在长大阶段近似服从抛物线规律(1/2方规律),在粗化阶段服从近1/10方规律。
[Abstract]:In order to elucidate the precipitation behavior of low cost titanium microalloyed steel during hot rolling in austenitic region, the thermal compression stress relaxation method was used in Gleeble-1500D thermal simulation testing machine. The deformation-induced precipitation kinetics of 0.047C-0.109Ti microalloyed steel was studied by double pass deformation and transmission electron microscopy (TEM). Through the analysis of stress relaxation curves, softening kinetics curves and the number and size of precipitates at different isothermal times, three sets of precipitation-time-temperature (PTT) curves were obtained respectively. The results show that the PTT curves obtained by the three methods all show "C" shape and the nose temperature is about 900 鈩，
本文编号：2287273
[Abstract]:In order to elucidate the precipitation behavior of low cost titanium microalloyed steel during hot rolling in austenitic region, the thermal compression stress relaxation method was used in Gleeble-1500D thermal simulation testing machine. The deformation-induced precipitation kinetics of 0.047C-0.109Ti microalloyed steel was studied by double pass deformation and transmission electron microscopy (TEM). Through the analysis of stress relaxation curves, softening kinetics curves and the number and size of precipitates at different isothermal times, three sets of precipitation-time-temperature (PTT) curves were obtained respectively. The results show that the PTT curves obtained by the three methods all show "C" shape and the nose temperature is about 900 鈩，
本文编号：2287273
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