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首页> 外文会议>International Conference on Recent Trends in Structural Materials >Impact of quenching temperature and isothermal holding time during austempering on bainite content in high-silicon steel
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Impact of quenching temperature and isothermal holding time during austempering on bainite content in high-silicon steel

机译：淬火温度和等温控时间在高硅钢贝氏体含量期间的影响

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Silicon plays an important role in the manufacture and processing of steel. It is involved in metallurgical processes in the melt, improves castability, and, together with aluminium, belongs to the elements which suppress cementite formation during heat treatment of steels. The last-named aspect offers a great potential for developing high-strength steels with excellent ductility. The amount of bainite in the microstructure has a substantial impact in this respect. Bainite fraction depends mainly on temperature and on the isothermal holding time in the bainitic transformation region. In steels with low silicon levels, isothermal bainitic transformation continues until all austenite has transformed to bainite. At higher silicon levels, approximately 2 weight percent, the bainitic transformation is expected to be incomplete. The resulting bainite fraction would then be dictated by the thermodynamic equilibrium in the austenite-bainite system. As a result, one could control microstructural evolution, and thus the mechanical properties in high-strength bainitic-martensitic steels
机译：硅在钢的制造和加工中起着重要作用。它涉及熔体中的冶金方法，改善可铸造性，以及与铝一起属于抑制钢的热处理中渗碳形成的元素。最后一个方面提供了开发具有优异延性的高强度钢的巨大潜力。微观结构中的贝氏体的量在这方面具有显着的影响。贝氏体馏分主要取决于贝氏体转化区中的温度和等温控时间。在硅水平低的钢中，等温贝氏体转化持续到所有奥氏体转化为贝氏体。在较高的硅水平下，大约2重量％，贝氏体转换预计将不完整。然后将得到的贝氏体级分由奥氏体 - 贝氏体系统中的热力学平衡来决定。结果，可以控制微观结构的演化，从而控制高强度贝氏体 - 马氏体钢中的机械性能

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