The Study Of Cutter Tooth Surface Strengthening Treatment Technology

Cutter is the main tool large of shearer and tunneling machine mining excavations，the tooth body damage in the course of their work the tooth head off its major damagein the form, to improve the wear resistance of the teeth is a major research topic. Thispaper presents a vacuum sintered nickel-based alloy coating surface hardeningtechnology to improve the cut tooth body hardness and toughness, the main work is asfollows:According to the material properties of nickel-based alloys and45steel, designedmelting process experiments. The study melting the coating process and coatingthickness of the coating and binding surface. HR-150A Rockwell Hardness TesterRockwell hardness measurements on the coating and substrate after sintering, theaverage hardness. HSRD-45electrical surface Rockwell hardness of the combination ofsurface microhardness measurement, analysis of the distribution of the hard phaseproduced in the sintering process, and the degree of alloying and basic hardness.Observe the microstructure of the surface region of the coating after sintering andbinding analysis of the diffusion phenomenon and its resultant coating and substrate.Coating cracking and dropping phenomenon occurred mainly during the coolingperiod, this paper application of ANSYS software finite element analysis of thermalstress between the coating and the substrate, the analysis of thermal stress on theinterfacial bonding. Wedge plus method is converted to a tensile load method toevaluate the bonding strength of the interface, the stress distribution of the analysiscombined surface area and other changes of the case and affect the interfacial bondingstrength of the main stress in the different coating thickness and width.