Influence of sulfur-type additives on rolling fatigue

The mechanism of the influence of sulfur-type additives on rolling fatigue life was investigated. It was found that sulfur-type additives tend to make the fatigue life longer at higher temperatures and higher concentrations. Some examinations of the effects of sulfur-type additives on the factors in fluencing the rolling fatigue life found that iron sulfide is formed on the rolling surface and makes the fatigue life longer. While the facility of i ron sulfide formation on the rolling surface controls the fatigue life, att ention also needs to be paid to the lubrication conditions such as the roll ing material, oil temperature, and reactivity of sulfur-type additives to u nderstand the fatigue life with sulfur-type additives.