Patent ID: 9702834
Date: 2017-07-11
CPC Classifications: G01N

Claim:
1. An inspection method for a bearing part, comprising the steps of: emitting X-rays onto a fatigued portion of a bearing part to be inspected; detecting annular diffracted X-rays diffracted by said fatigued portion; deriving one or more use condition elements based on the detected annular diffracted X-rays, wherein the one or more use condition elements include normal stress at said fatigued portion, shear stress at said fatigued portion, a relation between a central angle and an intensity of said annular diffracted X-rays, a half-value width of a peak obtained in accordance with the central angle of said annular diffracted X-rays, and an amount of austenite remaining in said fatigued portion; and estimating a one or more use conditions of said bearing part, by statistical calculation based on known relationships between the respective use conditions and each of the one or more use condition elements, wherein the one or more use condition include the number of loading of stress applied to said fatigued portion of said bearing part to be inspected, a load applied to said fatigued portion, and an oil film parameter at said fatigued portion; estimating a remaining life for the bearing part based on the use condition.