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首页> 外文会议>International Conference on Powder Transmission Components, Advances in High Performance powder Metallurgy Applications, Oct 16-17, 2001, Ypsilanti, Michigan >Rolling Contact Fatigue Properties of DensiFormed~(TM) Sintered Alloys
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Rolling Contact Fatigue Properties of DensiFormed~(TM) Sintered Alloys

机译：DensiFormed〜（TM）烧结合金的滚动接触疲劳性能

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摘要

With the current trend toward high density in PM industry, surface densification or DensiForming~(Tm) of bearing surfaces and gear tooth surfaces is widely used to improve the resistance to high hertzian contact pressures, particularly in transmission gear applications. Little information is available concerning the fatigue failure by surface pitting of P/M surface densified alloys. Unlike wrought bearing steels where the effect of internal defects such as non-metallic inclusions and carbide segregation on pitting resistance has been quantified, the rolling contact fatigue limits of P/M surface densified alloys are not fully investigated. This paper reports results on rolling contact fatigue of various surface densified PM alloys. The effect of surface density, residual pores and steel microstructure is reported. As it was reported in a previous work, PM surface densified alloys achieve similar pitting resistance than bearing wrought steels. Like bearing steels, the fatigue properties of surface densified alloys are to a great extent controlled by the contents of residual pores in the densified layer.
机译：随着当前PM工业向高密度发展的趋势，轴承表面和齿轮齿表面的表面致密化或DensiForming〜（Tm）被广泛用于提高对高赫兹接触压力的抵抗力，特别是在变速齿轮应用中。关于P / M表面致密合金表面点蚀引起的疲劳破坏的信息很少。不同于锻造轴承钢，其中量化了内部缺陷（如非金属夹杂物和碳化物偏析）对耐点蚀性的影响，而对P / M表面致密合金的滚动接触疲劳极限没有进行充分的研究。本文报道了各种表面致密的PM合金滚动接触疲劳的结果。报道了表面密度，残余孔和钢微结构的影响。正如先前工作中报道的那样，与轴承锻钢相比，粉末冶金表面致密化合金具有类似的抗点蚀性。与轴承钢一样，表面致密合金的疲劳性能在很大程度上受致密层中残余孔含量的控制。

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