Study On The Effect Of Copper-tin Alloy Powder On Mechanical Properties And Grinding Performance Of The Resin Bond Superhard Products

The resin bond superhard products are the indispensable tools of realizing process of highefficiency, saving energy,high precision and automated grinding.Although it has the advantages ofself-sharpening and sharp grinding,because of the characters of structure of the resin itself,which leadto poor heat-resistance of the resin,low strength and poor retention of shape of the resin bond grindingtools.According to the literature research and combined with the current situation of industry of theresin bond superhard products, Currently used to adopt the copper powder as addtive of the resin bondsuperhard products at home and abroad,However,the plastic of copper is too large,which lead togrinding tools are easily blocked when grinding tools process workpiece,further burns surface ofworkpiece and has an influence on quality of surface of the processing workpiece.Aiming at this kindof situation this article adopts copper-tin alloy powder instead of copper powder as additive of theresin bond superhard products.By controlling the four factors of proportion of copper-tin,content,particle size and shape of copper-tin alloy powder,this article has systematically studied mechanism ofinfluence of proportion of copper-tin,content,particle size and shape of copper-tin alloy powder onmechanical properties,heat-resistance and grinding performance of the resin bond superhard products.In this study, the flexural strength of the resin bond superhard products which respectively usedcopper powder and copper-tin alloy powder as addtive was measured by the cement electric bendingmachine;the hardness of surface of the resin bond superhard products was measured by the Rockwellhardometer;the temperature of thermal decompostion of the resin bond superhard products wasmeasured by the synthesized thermal analyser;the microstructure and composition of fracture of theresin bond superhard products respectively were measured by the Scanning electron microscopy andEnergy Disperse spectroscopy;the dynamic balance of the optimized resin bond superhard grindingwheel was corrected by the dynamic balancer; By the cutting machine of the ultra-thin diamondgrinding wheel the experiment of gringding properties of the resin bond superhard wheel was carriedout,the experiment of grinding properties adopt carbide alloy as workpiece; the roughness of surfaceof carbide alloy which has been grinded was measured by the roughmeter.The results show that the flexural strength of resin bond superhard products which was addedcopper powder is higher than that of the resin bond superhard products which was added copper-tinalloy powder;the propotion of copper-tin of copper-tin alloy powder has an effect on the flexuralstrength of the resin bond superhard products; the hardness of surface of the resin bond superhard products which was added copper powder is lower than that of the resin bond superhard productswhich was added copper-tin alloy powder; The infiltration properties of resin to copper powder isbetter than that of resin to copper-tin alloy powder;Namely the interfacial adhesion of resin to copperpowder is higher than that of resin to copper-tin alloy powder;The improvement of temperature ofthermal decompostion of copper-tin alloy powder on the resin bond superhard products is better thanthat of copper powder on the resin bond superhard products;the torque,power and electricity ofgrinding of the resin bond superhard grinding tools added copper-tin alloy powder are lowder than thatof the resin bond superhard grindingtools added copper powder,The grinding ratio of the resin bondsuperhard grinding tools added copper-tin alloy powder is twice as that of the resin bond superhardgrinding tools added copper powder,namely the gringding performance of the resin bond superhardgrinding tools added copper-tin alloy powder is better than that of the resin bond superhard grindingtools added copper powder;the roughness of surface of grinding workpiece of the resin bondsuperhard grinding tools added copper-tin alloy powder is lower than that of the resin bond superhardgrinding tools added copper powder;the low roughness of surface on modern processing industrywhich is increasingly demanding for higher precision has a very important significance.