Indonesia Conference Directory

Overlay hardfacing is one of surface engineering technique to improve wear resistance and hardness performances of AISI 8655 steel for high abrasive working condition. The purposes of this paper are to describe the effect of polarities and pre-heat temperatures to microstructures, distribution of hardness and wear resistance of hardfaced specimens. The pieces of AISI 8655 substrate were heated at 150oC, 200oC, 250oC and 300oC as variable of pre-heating parameters. Pre-heated substrates were coated by buffer layer E309. Hard layer of E Fe3 was coated above buffer layer by welding technique with Direct Current Electrode Negative (DCEN) and Direct Current Electrode Positive (DCEP) as parameters. Chemical compositions, microstructures, hardness and wear resistance were performed in this paper. The wear resistance result, DCEP has reduction of thickness 0.14 mm, 0.11 mm, 0.09 mm and 0.13 mm. Meanwhile, DCEN has reduction of thickness 0.11 mm, 0.11 mm, 0.09 mm and 0.11 mm.