Study On Turning Tool Wear Mechanism And Application Of Stellite Alloy Welding

As one of the core components of the locomotive engine, the performance of valve influents directly the function of locomotive. The valve is made of the high-temperature and alloyed heat-treatable steels. In order to be adapted to the severe working conditions of high temperature corrosion and impact load, etc., the stellite alloy at the cone surface of valve is pad-welded with satellite alloy in order to adapt the bad wok conditions such as high temperature,corrosive and impact load and so on. Geometric accuracy and surface roughness of the pad-welding are conformed by cutting process.Stellite alloy is a kind of difficult-to-machine material with high hardness and toughness, low capacity of heat dissipation. The machinability of the stellite alloy pad-welding is even worse because of its special craftwork, the tool will soon lose its efficacy, and the process is inefficient, high energy consumption and so on .The performance of satellite alloy and its deposited layers were analyzed first in this paper, and the potential adverse factors of cutting process were studied. The capability of YG610 and YS8 carbide-tipped tools cutting satellite alloy pad-welded layer was studied though orthogonal experiments. The failure of these tools mechanism and the effect regularity of cutting parameters were studied too. Our study shows that abrasive wear was the main cause of the failure of YG610, and tool breakage of YS8.The overall performance of YG610 is better than YS8.Our study can guide satellite alloy posited layer's cutting process.