Evolution of the Residual Stresses Formation from FeC0.15Cr12Ni2 Steel in the Part Surface During the Diamond Smoothing

The study devoted to investigation of influence of such diamond smoothing characteristics as: indenter pressing effort, smoothing rate, length feed value, and diamond indenter sphere radius, on the evolution of the residual stresses formation in the part surface from FeC0.15Cr12Ni2 heatproof wrought steel. The diamond smoothing is one of the most effective and simple technologies of the finishing-and-reinforcing machining of the complete, provided the residual stresses formation of the part surface, considerably influenced on fatigue and corrosion resistance of the part. The mathematical models, binding the diamond smoothing process characteristics with the residual stresses value and occurrence depth, were received as a result of factorial experiment in the study. Result inaccuracy of the residual stresses value and occurrence depth results of the calculation, based on the models, is within 20%. Accuracy proof of the tests, homogeneity of variances, and models adequacy were implemented by Student's test, Kokhren's test, and Fisher's test, respectively.