Progress in bearing performance of advanced nitrogen alloyed stainless steel, cronidur 30

摘要

The bearing rig tests performed in this study demonstrate superior bearing performance of Cronidur 30 steel over conventional bearing steels. In these tests the L_(10) life of Cronidur 30 steel as calculated by the DIN/ISO 281 method was 80 times the unfactored L_(10) life under full lubrication conditions. In boundary lubrication conditions, the Cronidur 30 steel demonstrated the L_(10) life capability typical of EHD lubrication conditions, whereas the other steels showed drastically reduced lives. In tests with predamaged rances and boundary lubrication conditions, Cronidur 30 demonstrated 8 times the calculated L_(10) life, whereas the conventional steels exhibited further reduce in lives. The improved performance of Cronidur 30 steel over conventional bearing steels is attributed to its unique compositional formulation and microstructure that results in provision of balanced properties in the alloy - hardness, toughness, and corrosion resistance.