Abstract
This work describes the wire arc additive manufacturing (WAAM) approach used to fabricate parts from wear-resistant steel. The microstructure, crystal structures, and mechanical properties of the resulting samples were thoroughly analyzed. The wear-resistant steel parts demonstrated good forming, no internal defects, good metallurgical bonding, and excellent wear resistance. The metallographic analysis confirmed that the main phase was ferrite. The microhardness of the sample along its cross section was uniform in both horizontal and vertical directions and equals to 464.7HV0.2 and 482.4 HV0.2, respectively. The average values of tensile strength, elongation ratio, and room temperature Charpy shock were equal to 945.3 MPa, 4.3%, and 5 J, respectively.
Highlights
wire arc additive manufacturing (WAAM), similar to 3D printing technology, uses the heat generated by the arc to provide a heat source during work to melt the metal wire. e melted metal wire will follow the set forming path to melt the metal slurry
We studied the structure and mechanical properties of the wear-resistant materials subjected to the WAAM. is paper provides data needed to advance and improve the fabrication of reliable agricultural machinery and equipment. e wear-resistant steel typically contains Si, Mn, Cr, Mo, V, W, Ni, Ti, B, Cu, and rare earth elements
Forming Characteristics. 3D printed wear-resistant steel sample is formed without collapsing and with small welding wire splash. e cross section analysis of the sample showed minimum defects and satisfactory metallurgical bonding. ese observations further confirmed the excellent formability of the WAAM-printed wear-resistant steel
Summary
WAAM, similar to 3D printing technology, uses the heat generated by the arc to provide a heat source during work to melt the metal wire. e melted metal wire will follow the set forming path to melt the metal slurry. WAAM uses an electric arc as a heat source and filler wires as raw materials It is suitable for manufacturing large parts [15,16,17,18,19,20,21] especially for agricultural machinery prone to corrosion and wear after prolonged usage. According to sparse statistical data from Chinese departments of electric power, building materials, metallurgy, coal mining, and agricultural machinery, spare parts, production annually requires over 1.5 million tons of steel. Us, these and all other economic losses caused by wear and tear of the mechanical equipment and the steel consumption are enormous These damages could be prevented to a certain degree if the quality of the resistant steel (to make it more wear-resistant) is improved. We focused on the wear-resistant steel containing high levels of C and Cr
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