Nickel-based high temperature wear-resistant non-slag hardfacing electrode and its heat treatment process

A kind of nickel-base non-slag hardfacing electrode with thermal wear resistance was investigated.The electrode has little weld fume during welding,and the weld fume does little harm to workers' health.Since there is no slag on the bead after welding,it can weld successively with multi-pass and needn't remove slag.In addition,its price is much cheaper than that of the cobalt-base hardfacing electrode,and the properties at high temperature(at 650℃) are excellent.Due to the electrode has more elements than those in other normal hardfacing electrode,the weld metal components are more complicated,the residual stress after welding is higher,and the weld metal structure is not stable with the high speed cooling after welding,which affect general propertres of the weld metal.In order to use the electrode more suitably and widely,the heat-treat process of weld metal was also discussed.