High-Carbon High-Silicon Austempered Steel

[9714168]这个SGER项目的重点是研究一系列新的高碳等温钢。这种钢是利用等温球墨铸铁（ADI）技术的概念合成的。控制钢的成分，热处理后获得高碳奥氏体和下贝氏体组织。添加硅或铝的作用是抑制碳化物的形成，从而提高这些钢的韧性。实验计划包括260 ~ 400℃之间的熔炼、铸钢、热轧、奥氏体化和等温回火。用金相显微镜对钢的组织进行了表征，用x射线衍射测定了钢的奥氏体和铁素体的碳含量和体积分数。机械性能的测量重点是强度和韧性。研究应表明，这些钢加工的可行性，以感兴趣的性能。福特汽车公司和瓦格纳铸造公司正在为这项工作提供支持。等温回火工艺提供了一种低成本、高韧性、强度和塑性结合良好的钢，适用于汽车和能源领域。＊＊＊

9714168 Putatunda The focus of this SGER project is research on a new series of high carbon, austempered steels. The steel is synthesized using concepts from austempered ductile cast iron (ADI) technology. The steel composition is controlled to achieve a high carbon austenite and lower bainite structure after heat treatment. Silicon or aluminum additions act to suppress the formation of carbides, thereby increasing the toughness in these steels. The experimental plan includes melting and casting the steels, hot rolling, austenitizing, and austempering between 260 and 400 C. Microstructure in the steels is characterized by microscopy, and the carbon content and volume fractions of austenite and ferrite determined by x-ray diffraction. Mechanical properties are measured with emphasis on strength and toughness. The research should show the feasibility of processing these steels to the properties of interest. Ford Motor Company and Wagner Casting Company are contributing support to the effort. %%% The austempering process offers a low cost, high toughness steel with a good combination of strength and ductility applicable to the automotive and energy fields. ***