| Abstract: |
Iron-based hardfacing alloys are widely used to counteract abrasive and impact wear of industrial components in soil, sand and mineral processing applications. These alloys show a high performance to cost ratio as well as a low environmental impact. The wear resistance of the components cladded with these alloys depends on achieved clad microstructure i.e. on the alloys chemical composition, the coating method and process parameters selected.
The present work focuses on iron based hardfacing alloys with varying amount of chromium, vanadium, tungsten, molybdenum and carbon deposited by plasma transferred arc and laser. Weldability, hardness, abrasive and impact wear of the clads are presented and interpreted through their microstructure. The performance of the iron based clads is compared with that of two common and commercially available cladding powder consumables, high speed steel AISI M2 and nickel-based tungsten carbide metal-matrix composites (MMC). The hardness of the iron based clads investigated ranges between 60 and 65 HRC while abrasive wear is typically below 20 mm3 (ASTM G65, procedure A). Microstructure consists of different primary precipitated carbides, a martensitic matrix and eutectic carbides.
|
|
