用两种硫含量分别为0.016％和0.005％的GCr15轴承铜,在3835、4305和4904Mpa三种接触应力条件下测定接触疲劳寿命。结果表明,当接触应力大时,“低硫钢”寿命高;应力小时,“高硫钢”寿命高。还发现硫化物和氧化物的大小及数量在两种不同硫含量钢中的分布存在互补关系,是造成上述现象的主要原因。 Two kinds of GCr15 bearing copper with 0.016% and 0.005% sulfur respectively were used to measure the contact fatigue life under the contact stresses of 3835, 4305 and 4904Mpa. The results show that when the contact stress is high, the life of “low-sulfur steel” is high; when the stress is small, the life of “high-sulfur steel” is high. Also found that the size and quantity of sulfide and oxide in the two different sulfur content of the steel in the distribution of complementary relationship is the main reason for the above phenomenon.