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首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Transformation Induced Plasticity (TRIP) Effect Used in Forming of Carbon CMnSi Steel
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Transformation Induced Plasticity (TRIP) Effect Used in Forming of Carbon CMnSi Steel

机译：碳锰铁碳钢的相变诱导塑性效应

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Transformation induced plasticity (TRIP) steel combines high strength and high ductility that makes it particularly suitable for forming. Martensite within a ferrite matrix is usually obtained either by continuous casting of slabs followed by hot rolling (which is the fastest method, hence the most economical one, producing, however, relatively thick products) or by the continuous casting of slabs followed by hot rolling, cold rolling and annealing (the method used for thin products). High cooling rates, low coiling temperatures and low reduction during hot deformation were generally found to suppress the formation of polygonal ferrite and promote the presence of retained austenite. This paper focuses on development and modifications of two CMnSi-based TRIP steels with 0,23 % C;l,4 % Mn; 1,9 % Si; ( 0,08 % Nb) by means of laboratory thermomechanical processing. Description of experimental devices for the analysis of transformation plasticity under tension-compression loading is given. Experiments were carried out on the simulator for thermal-deformation cycles SMITWELD and TANDEM was used for thermomechanical processing on the laboratory rolling mill. The maximum volume fraction of retained austenite and the resulting optimum combination of tensile strength and ductility were achieved in testing heats. Special attention was paid to volume fraction changes of single phases and to changes in morphology of phases. The results suggest that rather short isothermal bainite transformation times are sufficient to obtain TRIP microstructure. The influence of parameters of thermomechanical processing such as the amount of strain, forming temperature and austenitization time and temperature on microstructures of TRIP steels were evaluated.
机译：相变诱发塑性（TRIP）钢兼具高强度和高延展性，使其特别适合于成型。铁素体基体中的马氏体通常通过连续铸造板坯，然后进行热轧（这是最快的方法，因此是最经济的方法，但是生产相对较厚的产品）来获得，或者通过连续铸造板坯然后进行热轧来获得。 ，冷轧和退火（用于薄产品的方法）。通常发现，较高的冷却速率，较低的卷取温度和较低的热变形率可抑制多边形铁素体的形成并促进残余奥氏体的存在。本文着重研究和开发了两种CMnSi基TRIP钢，它们具有0.23％的C; 1.4％的Mn; 1.9％硅; （0.08％Nb）通过实验室热机械处理。给出了在拉压载荷作用下分析相变塑性的实验装置的描述。在模拟器上进行了热变形循环实验SMITWELD，TANDEM用于实验室轧机的热机械加工。在测试加热时，获得了残余奥氏体的最大体积分数以及拉伸强度和延展性的最佳组合。特别注意单相的体积分数变化和相的形态变化。结果表明，相当短的等温贝氏体转变时间足以获得TRIP微观结构。评估了热机械加工参数（如应变量，成形温度以及奥氏体化时间和温度）对TRIP钢组织的影响。

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