The grinding temperature and the grinding force were measured by using the thermocouple technique and 3-axis piezoelectric dynamometer in the grinding process of GCr15 harden steel.The residual austenite content,the subgrain size of the martensite and the micro-strain in the grinding surface were analyzed on the basis of X-ray diffraction(XRD) examinations of the microstructure.The contact stress and the plastic strain of the grinding surface were simulated by using the finite element method(FEM).The effect...