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本文研究表面强化处理零件的心部、表层性能与疲劳性能的关系。由结果知:渗碳硬化层较厚、裂纹源易在表层产生的20~#钢780℃淬火的疲劳性能优于900℃淬火;渗碳硬化层较薄、裂纹源易在过渡区产生的15铬钢却是900℃淬火的疲劳性能优于780℃淬火。这清楚地表明;随着裂纹源产生位置的不同,对心部、表层性能及层深的要求也有所不同,因此,透彻地研究心、表性能与疲劳性能的关系,可为评定各种新工艺的合理使用場合及寻求最佳工艺提供重要依据。
In this paper, the relationship between the core part, the surface properties and the fatigue properties of surface strengthening parts is studied. The results show that: the carburizing hardened layer is thick, the crack source is easily generated in the surface of the 20 ~ # steel 780 ° C quenching fatigue properties better than 900 ° C quenching; carburizing hardened layer is thin, cracks easily produced in the transition zone 15 Chromium steel is 900 ℃ quenched fatigue performance better than 780 ℃ quenching. This clearly indicates that the requirements on the core, surface properties, and depth of the heart vary with the location of the crack source. Therefore, a thorough study of the relationship between heart, table performance and fatigue performance can be used to assess various new The rational use of processes and seek the best technology to provide an important basis.