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A historical overview of steel tempering parameters

机译：钢回火参数的历史概述

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摘要

The results of the stress relieving and tempering processes are dependent on the temperature and time of the process, which may be correlated using a parameter such as Holloman's (Holloman-Jaffe) parameter or the Larsen-Miller parameter. These parameters are a measure of the thermal effect of the process on the metallurgical transformation of the steel during tempering. The processes that exhibit the same tempering parameter are expected to exhibit the same effect (such as hardness). However, these more traditional numerical expressions assume isothermal tempering processes which seldom exist in production tempering ovens due to the heat-up period prior to soakingrnat the desired tempering temperature. Although the Larsen-Miller Equation and the Holloman-Jaffe parameter are well-known, their origin and limitations and, in some cases, their use, are often not discussed in detail in most heat treating texts. Therefore, a review of the metallurgy, origin, use and limitations of these expressions is provided here. In addition, recent work describing the development of more precise numerical relationships to describe the tempering process, including non-isothermal tempering processes, is also discussed.
机译：消除应力和回火过程的结果取决于过程的温度和时间，这可以使用诸如Holloman（Holloman-Jaffe）参数或Larsen-Miller参数之类的参数进行关联。这些参数是回火期间该工艺对钢的冶金转变的热效应的量度。表现出相同回火参数的过程有望表现出相同的效果（例如硬度）。然而，这些更传统的数值表达式假设等温回火过程，由于在均热至所需回火温度之前均存在加热时间，因此在生产回火炉中很少存在。尽管Larsen-Miller方程和Holloman-Jaffe参数是众所周知的，但是它们的起源和局限性以及在某些情况下的用法在大多数热处理教材中通常都没有详细讨论。因此，这里提供了这些表述的冶金学，起源，用途和局限性的综述。此外，还讨论了描述更精确的数值关系以描述回火过程（包括非等温回火过程）的最新工作。

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  • 作者

    Lauralice C.F. Canale; Xin Yao; Jianfeng Gu; George E. Totten;

  • 作者单位

    Departamento de Eng. Materials, Aeronautica e Automobilistica EESC - Universidade de Sao Paulo (USP) Av Trabalhador Sao-carlense, 400 Sao Carlos, SP;

    Department of Mechanical and Materials Engineering Portland State University P.O. Box 751 Portland, OR 97207-0751, USA;

    School of Materials Science and Engineering Shanghai Jiao Tong University 800 Dongchuan Road, Shanghai 200240, China;

    Department of Mechanical and Materials Engineering Portland State University P.O. Box 751 Portland, OR 97207-0751, USA;

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  • 正文语种 eng
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  • 关键词

    tempering; tempering parameters;

    机译：回火回火参数;

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