Development of Electrode for Hot-roller Hardfacing

A special hot-roller hardfacing electrode is studied in this paper.A new alloy system suitable for hot-roller hardfacing is found by improving the composition of the electrode coating.X-ray and microstucture analyses indicate that the new hardfaced metal microstructure consists of martensite.retained austenite and carbonide.The hardness of the hardfacing is among HRC 58~60.Wearing resistance tests and industrial practices have proved that the hardness is 6.1 times as high as 45 sted's.The hardness still keeps between HRC 58 and 59 after 1000minutes,at 580℃.