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首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Contribution to the Understanding of Austenite Stability in a 12Cr-9Ni-4Mo Maraging Steel
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Contribution to the Understanding of Austenite Stability in a 12Cr-9Ni-4Mo Maraging Steel

机译：对理解12Cr-9Ni-4Mo马氏体时效钢中奥氏体稳定性的贡献

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摘要

Maraging steels show an excellent combination of high strength and ductility, which makes them very attractive in a large variety of potential applications. The present work is concerned with the main factors influencing the stability of metastable austenite in such a steel. At subzero temperatures a large variation in the isothermal transformation behaviour of austenite to martensite has been observed. Factors such as the austenite grain size and the interstitial content in solid solution are known to influence austenite stability and, therefore, the martensitic transformation. In this steel, the addition of titanium results in carbonitride precipitation. These precipitates play an indirect but important role in the stability of austenite by means of removing interstitials from the solid solution and by inhibiting an austenite grain growth. The combination of techniques such as X-ray diffraction, magnetisation measurements, three-dimensional neutron depolarisation, and internal friction measurements enables a complete characterisation of the transformation. A step towards understanding the factors responsible for the variation in the behaviour observed is the main contribution of this work.
机译：马氏体时效钢表现出高强度和延展性的极佳组合，这使其在多种潜在应用中非常有吸引力。目前的工作涉及影响这种钢中亚稳态奥氏体稳定性的主要因素。在零度以下的温度下，观察到奥氏体向马氏体的等温转变行为有很大的变化。已知诸如奥氏体晶粒尺寸和固溶体中的间隙含量之类的因素会影响奥氏体稳定性，从而影响马氏体相变。在这种钢中，添加钛会导致碳氮化物沉淀。这些沉淀物通过从固溶体中去除间隙并抑制奥氏体晶粒的生长，在奥氏体的稳定性中发挥间接但重要的作用。诸如X射线衍射，磁化测量，三维中子去极化和内部摩擦测量等技术的结合，可以完全表征转变。理解导致行为变化的因素的步骤是这项工作的主要贡献。

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