High Speed Broaching of Case Hardening Steel SAE 5120

To achieve knowledge of the effects of broaching to the component and the influence to subsequent process steps, broaching experiments have been carried out on case hardening steel SAE 5120 using different tools and cutting speeds up to 50 m/min with use of cooling lubricant and in dry machining. The process forces were analyzed and the resulting surface was examined using X-ray diffraction and roughness testers. High cutting speeds lead to low cutting forces but high residual stresses. An influence of the varied parameters and machining conditions to the surface quality was not detected.