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New heat treatment process for advanced high-strength steels

机译：新型高强度钢材的热处理工艺

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Today's advanced steels are required to possess high strength and ductility. It can be achieved by choosing an appropriate steel chemistry which has a substantial effect on the properties obtained by heat treatment. Mechanical properties influenced the presence of retained austenite in the final structure. Steels of this group typically require complicated heat treatment which places great demands on the equipment used. The present paper introduces new procedures aimed at simplifying the heat treatment of high-strength steels with the use of material-technological modelling. Four experimental steels were made and cast, whose main alloying additions were manganese, silicon, chromium, molybdenum and nickel. The steels were treated using the Q-P process with subsequent interrupted quenching. The resulting structure was a mixture of martensite and retained austenite. Strength levels of more than 2000 MPa combined with 10-15 % elongation were obtained. These properties thus offer potential for the manufacture of intricate closed-die forgings with a reduced weight. Intercritical annealing was obtained structure not only on the basis of martensite, but also with certain proportion of bainitic ferrite and retained austenite.
机译：今天的先进钢必须具有高强度和延展性。可以通过选择适当的钢化学来实现，这对通过热处理获得的性质具有显着影响。机械性能影响了最终结构中保留奥氏体的存在。该群体的钢通常需要复杂的热处理，这使得对所用设备的需求很大。本文介绍了新的程序，旨在简化高强度钢的热处理，利用材料技术建模。制造了四种实验钢并铸造，其主要合金化添加剂是锰，硅，铬，钼和镍。使用随后的中断淬火使用Q-P过程处理钢。所得结构是马氏体和保留奥氏体的混合物。获得2000多MPa的强度水平与10-15％伸长率。因此，这些性质提供了制造具有减轻重量的复杂闭合锻造的潜力。间临界退火不仅基于马氏体的基础获得结构，而且具有一定比例的贝氏体铁氧体和保留奥氏体。

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