High-Carbon High-Silicon Austempered Steel

小行星9714168 SGER项目的重点是研究一系列新的高碳等温淬火钢。该钢是使用等温淬火球墨铸铁（ADI）技术的概念合成的。 控制钢的组成以在热处理后获得高碳奥氏体和下贝氏体组织。 硅或铝的添加起到抑制碳化物形成的作用，从而增加这些钢的韧性。 实验计划包括钢的熔炼和铸造、热轧、奥氏体化和在260 - 400 ℃之间的等温淬火。 用金相显微镜表征了钢的显微组织，用X射线衍射测定了钢中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。 该研究应表明将这些钢加工成感兴趣的性能的可行性。 福特汽车公司和瓦格纳铸造公司正在为这一努力提供支持。 %等温淬火工艺提供了一种低成本、高韧性的钢，具有良好的强度和延展性，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. ***