t 一、前言对低碳钢(包括低碳合金钢)进行强烈淬火强化,以获得低碳马氏体,是充分发挥低碳钢强度潜力的有效途径。近十多年来,特别是无产阶级文化大革命以来,在毛主席的无产阶级革命路线指引下,国内许多单位进行了低碳马氏体强化的科学研究与生产实践。由于坚持无产阶级政治挂帅,理论紧密联系实际,实行工人、领导干部、技术人员的三结合,开展厂、矿、所、校广泛的社会主义大协作,使低碳马氏体的研究、应用出现了可喜的面貌。低碳马氏体在机械性能方面,具有高强度与良好的塑性、韧性相结合的特点;在工艺性能方面,可发挥低碳钢固有的优良冷成型性与焊接性、较小的热处理脱碳淬火变形倾向等特 t I. INTRODUCTION Strong quench hardening of low carbon steels (including low carbon alloy steels) to obtain low carbon martensite is an effective way to give full play to the strength potential of low carbon steels. In the past decade or so, especially since the Great Proletarian Cultural Revolution, under the guidance of Chairman Mao’s proletarian revolutionary line, many units in China conducted the scientific research and production practice of low-carbon martensitic reinforcement. Due to the insistence on proletarian politics, the theory is closely linked to reality, and the three combinations of workers, leading cadres and technical personnel are carried out to carry out extensive socialist cooperation among factories, mines, institutes and schools so that the research and application of low-carbon martensite appears A welcome face. Low-carbon martensite in mechanical properties, with high strength and good plasticity, toughness combined with the characteristics of the process performance, low-carbon steel can play the inherent good cold formability and weldability, heat treatment of smaller decarburization Quenching distortion and other special