The grinding process of titanium rod has serious grinding wheel adhesion because the grinding force and grinding temperature are very high so that the grinding burns and cracks occur briefly. When titanium rods are ground with a normal abrasive, grinding burns and cracks can occur on the surface, even if the amount of grinding depth required is very small. The general defects are yellowish brown spots, hair striate crack, on which its direction and grinding direction straight with a large grinding amount of surface will have fish scale wrinkling and plastic deformation of the metal cladding. What is this stuff? Let's review the silicon carbide grindstone grinding the titanium rod for chemical reaction formula: SiC+Ti→TiC+Si. And then take a look at the oxidation reaction formula of silicon carbide grinding grains at certain atmospheric temperature: SiC+2O2→SiO2+CO2.

　　Titanium rods are widely used in aerospace industry at home and abroad for their excellent heat and corrosion resistance and special high specific strength. To aim the titanium rod in the grinding process is very simple grinding burn problem, using the leading test method in the grinding process of grinding force under proper grinding condition of temperature, surface roughness and surface tracing. The surface layer metallographic arrangement and micro hardness change rules were analyzed and discussed. The research results show that TC6(Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0.3Si) titanium rod burns when grinding temperature exceeds 600℃. The surface tracing deteriorates with the increase of grinding temperature. When severe burns occur, cracks occur on the surface of the workpiece, and the direction is roughly straight with the grinding direction. When the workpiece was burned, the metallographic arrangement on the surface of the material changed and the α phase particles were significantly larger, which reduced the physical and mechanical properties of the titanium rod. The research results are to seek for the optimized supply theory and test basis of high efficiency and high precision titanium rod grinding process.

　　During the grinding process, a part of the carbon atoms to be grinding work piece surface and the slide to wipe the shear stress under the effect of SiO2 oxide film stripping to constitute the SiC particle oxidation. After wearing and tearing, the surface of oxygen and carbon layer is left with the opposite effect on weakening of abrasive surface to lose carbon layer. Moreover, the SiC abrasive hardness strength drops with increase of grinding force, grinding wheel wear and grinding temperature rise is inevitable. From the perspective of micro general, the process of grinding grains and adhesion is that the cutting edge first appears small area adhesion and then large area adhesion, the grinding grains are broken in fine, then the grinding grains are broken and fall, and the titanium rod grinding zone has plastic deformation. Grinding particles bond to each other with the work piece, which has both physical adsorption effect and chemical adsorption effect. In addition to the shear force of relative sliding, the processed material is transferred to grinding particles, which is the whole process of grinding wheel adhesion.

Grinding wheel adhesion is very simple to form a plug, which makes grinding zone temperature increase and grinding surface along the work piece layer of distributed grinding burns with transformation layer and residual stress. During the grinding cooling process, when the grinding depth is large, the oxidation film density of the grinding surface reaches the critical temperature, the temperature of the grinding arc zone will rise sharply due to the film formation pleasure of the grinding fluid, and the cooling effect becomes worse. When the increased temperature exceeds the limit of the normal abrasive, the abrasive particles will fall down due to softening damage. Therefore, it is necessary to select a new type of super-hard grinding wheel to further increase the high temperature tolerance of grinding arc zone.