氮化层的马氏体感应硬化*

IF 0.3 Q4 THERMODYNAMICS
S. Hoja, N. Haupt, M. Steinbacher, R. Fechte-Heinen
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引用次数: 2

摘要

在本研究中,研究了氮化和感应淬火的结合,因为这不仅可以节省大量的工艺时间和能量,而且还可以产生单个工艺无法设置的表面层性能。目前的研究重点是在感应加热过程中化合物层的溶解以及由此形成的显微组织和硬度分布。进一步研究了复合层的缺失对马氏体相变的影响。为此,对不同氮化层进行了马氏体硬化,并对其金相和物理组织进行了研究。在渗氮层发生马氏体转变后,由于渗氮层中氮化物的分解,出现了孔隙和残余奥氏体。在表面硬化和去除复合层过程中,温度升高可减少残余奥氏体。研究表明,感应淬火的最佳初始条件是渗氮复合层并在感应热处理前机械去除复合层。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Martensitic Induction Hardening of Nitrided Layers*
Abstract In this research a combination of nitriding and induction hardening is investigated, as this is expected not only to result in significant savings in process time and energy, but also to produce surface layer properties that cannot be set with one of the individual processes. The focus of the current investigations was on the dissolution of the compound layer during inductive heating and the resulting microstructure formation and the hardness profile. Furthermore, it was investigated how the absence of a compound layer affects the subsequent martensitic transformation. For this purpose, differently nitrided surface layers were martensitically hardened and the microstructure was investigated metallographically and physically. After the martensitic transformation of the nitrided layer porosity and retained austenite were observed due to the decomposition of the nitrides of the compound layer. The retained austenite could be reduced by higher temperatures during surface hardening and compound layer removal. The investigations showed, that the optimum initial condition for induction hardening is nitriding with compound layer and a mechanical removal of the latter prior to induction heat treatment.
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来源期刊
CiteScore
1.50
自引率
33.30%
发文量
43
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