Keyword: fatigue strength

  • Study of fatigue failure for carburized carbon steel

    Materials Science. Non-Equilibrium Phase Transformations., Vol. 9 (2023), Issue 2, pg(s) 62-64

    This study presents the effect of carbonation on 1020 carbonate, low fatigue. The carbonation of the samples was carried out at a temperature of 900 ° C and at a variable time of 5-9 hours. After the process of carbonization, the process was carried out with a temperature of 500 ° C and 30 minutes. The hardness of the sample was tested before the Chemical heat treatment was 206.5 HB and the hardness of the carbonated samples at 900 ° C and at 5 hours was 209.3HB and the hardness of the carbonated samples at 900 ° C and for 6 hours was 209.5 HB. The carbonated sample salad was 900 ° C and 9 hours 211.4 HB. The boxes were heated at (850-900) ºC in an electric furnace for different durations or times. Fatigue was tested for samples before and after carbonation carburizing contributed to the improvement in fatigue strength in different proportions. The degree of improvement depended on the depth (thickness) of the hardened layer and on the microstructure of a carburized steel.

  • THE DEPENDENCE OF THE PHYSICAL AND MECHANICAL

    Innovations, Vol. 3 (2015), Issue 1, pg(s) 25-27

    The results of studies of the influence of the type of machining and tool material to the structural state of the surface layer and the fatigue strength of ХВСГsteel during machining are shown. Processing with the composite-10 tool in a surface layer for α – and γ – phases is accompanied only by compressing residual pressure while abrasive processing promotes occurrence of stretching pressure of an I-type. Increasing of cutting speed of the composite-10 tool from 50 to 200 m/min does not lead to significant changes in fatigue strength.