Nondestructive testing and control of the residual stress of rail in service

Rail is a main part of railway track. Its reliability relates to the national economy and people's livelihood. The fracture of rail will lead to disastrous consequences. This article mainly introduces the residual stress of rail detection and regulation technology, completes the relevant tensile experiments and rail experiments, analyses the results and the function of regulation. Eventually, an effective way to detect and reduce the residual stress of rail is found.