A heat treatment regime for steel 13Cr11Ni2WMoV quenched from 980°C with the aim of simultaneous achievement of the required values of impact toughness and strength is investigated. It is established that the optimum condition of the heat treatment regime after high-temperature quenching is double tempering, the first of which is above A c 1 and is intercritical tempering. It is demonstrated that an increase in the first tempering temperature improves impact strength considerably in the final condition, and a reduction in second tempering temperature improves steel strength. A new heat treatment regime is proposed with which the temperatures of two-stage tempering are 765 and 635°C. Mechanical property values are achieved satisfying component specifications and there is a reserve for impact strength that is important for large components.

中文翻译：

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采用临界淬火提高油气管道截止阀关键部件的一套13Cr11Ni2W2MoV钢力学性能

研究了从 980°C 淬火的 13Cr11Ni2WMoV 钢的热处理制度，目的是同时达到所需的冲击韧性和强度值。确定了高温淬火后热处理制度的最佳条件为双回火，其中一次回火在A c 1 以上，为临界间回火。结果表明，在最终条件下，第一次回火温度的增加显着提高了冲击强度，而第二次回火温度的降低则提高了钢的强度。提出了一种新的热处理制度，两阶段回火的温度分别为 765 和 635°C。机械性能值达到满足组件规格的要求，并且保留了对大型组件很重要的冲击强度。