Thermal properties of machined materials, which depend significantly on the change in cutting temperature, have a considerable effect thermal machining characteristics. Therefore, used for numerical simulation process should be determined depending temperature. To determine methodology and software-implemented algorithm were developed their calculation. This is based analytical models determina...

In this study, Ni–P–Fe2O3 composite was deposited on AISI 4140 steel using different concentrations of Fe2O3 ranging from 0.1 to 0.5 gr/lit in an electroless bath. The phase analysis and surface morphology the samples were characterized X-ray diffraction FESEM. corrosion behavior coated investigated a 3.5 wt. % NaCl solution through potentiodynamic polarization. results test show that adding in...

Se evalúa el tratamiento termoquímico de boro a temperaturas 950 y 1000 °C, con un tiempo exposición 2 0.5 h; la adhesión capa se analiza mediante técnica Rockwell C prescrita por norma alemana VDI 3198 obtener una clasificación cualitativa; microscopía óptica observa tasa crecimiento morfología FeB / Fe₂B en superficie del material; presencia fases determinó difracción rayos X (XRD). La electr...

In this study, the fracture behavior of AISI 4140 low-alloy steel nitrided with respect to applied current density was investigated. A series rotary bending fatigue tests were performed various loads (350, 400, 450, and 500 N) at a constant rotational speed 2000 rpm. The results show that increase in strength (up 35%) strongly depends on compound layer formed during nitriding process. addition,...