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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Development of TRIP Effect in Si-Mn Bulk Steel Using Technique of Press Forging
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Development of TRIP Effect in Si-Mn Bulk Steel Using Technique of Press Forging

机译：压锻技术开发Si-Mn大块钢的TRIP效应

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摘要

The main emphasis of this study has been placed on investigation of practical use of thermomechanical processing parameters using press forging to optimize complex structure development in bulk TRIP steel. The large compressive deformations of cylindrical specimens have been introduced in austenite recrystallized, nonrecrystallized and intercritical temperature regions. The effect of austenite conditioning have been focus at first step on finding of favorable ferrite transformation condition. Considering the results of prior austenite conditioning on ferrite transformation course, in the second step the bainite and retained austenite characteristics have been optimized. The introduced straining magnitude at different temperatures prior transformation had strong impact on austenite conditioning, subsequently on austenite transformation kinetics, and on multiphase structure evolution in bulk samples. Employing thermomechanical parameters resulted in formation of multiphase structures and their favorable characteristics with respect to volume fraction of individual phases the structure consists, size, distribution, and morphology. The microstructures resulting from individual thermomechanical processing were characterized by optical and scanning electron microscopy. Volume fraction of retained austenite was evaluated by neutron and X-ray diffraction analysis. Despite the similarity in the obtained microstructure by performing individual thermomechanical schedules the mechanical properties varied in dependence of thermal and strain conditions applied.
机译：这项研究的主要重点放在了热机械加工参数的实际使用研究上，该工艺使用压力锻造来优化散装TRIP钢中复杂结构的发展。圆柱试样的大压缩变形已引入到奥氏体重结晶，非重结晶和临界温度区域。奥氏体调节的影响已首先集中在寻找有利的铁素体相变条件上。考虑到先验奥氏体在铁素体转变过程中的调节结果，第二步中贝氏体和残余奥氏体的特性已得到优化。转变前在不同温度下引入的应变幅度对奥氏体条件，随后的奥氏体转变动力学以及大体积样品的多相结构演变有很大影响。利用热力学参数导致形成多相结构及其相对于各相的体积分数，结构，尺寸，分布和形态的有利特性。通过光学和扫描电子显微镜对由单独的热机械加工产生的微观结构进行了表征。通过中子和X射线衍射分析评估残余奥氏体的体积分数。尽管通过执行单独的热机械程序在获得的微观结构中具有相似性，但机械性能仍根据所施加的热和应变条件而变化。

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