Investigations on Additively Manufactured Stainless Bearings

Additive manufacturing with multi-material design offers great possibilities for lightweight and function-integrated components. A process chain was developed in which hybrid steel–steel-components high fatigue strength were produced. For this, a material combination of stainless powder Rockit® (0.52 wt.% C, 0.9% Si, 14% Cr, 0.4% Mo, 1.8% Ni, 1.2% V, bal. Fe) cladded onto ASTM A572 mild steel by plasma arc deposition welding investigated. Extensive characterization has shown that defect-free claddings can be produced carefully adjusting the process. With tailored heat treatment strategy machining semi-finished products, bearing washers thrust cylindrical roller These showed longer life than previously AISI 52100 as cladding. It also remarkable service cladding conventional monolithic washers. This reached through favourable microstructure finely distributed vanadium chromium carbides martensitic matrix well presence compressive residual stresses, are largely retained even after testing. The potential further enhancement performance Tailored Forming investigated compression forging tests found to limited due low forming capacity material.