| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 97 === In this study, a particle welding tester has been employed to weld the 500 μm diamond particle coated copper on the aluminum workpiece surface. The DC power supply is used as the welding energy to weld. The resistance material is added into the interface between the electrode and the diamond particle. Hence the welding energy can transfer from the diamond particle to aluminum surface so that the aluminum softens and the diamond particle is embedded into the surface under the applied force. In this experiment, the effects of the applied force (2-20 N), power (13-35 W) on the welding pattern and the behavior of welding interface.
When the silicon carbide is used as the resistance material, the weld able region map is established in terms of the applied force and power. The map is divided into the insufficient heat input, the normal welding and the excess heat input. In the insufficient heat input region the power is less than 20 W, and the diamond can not be embed into the workpiece surface because the power is not enough. In the normal welding region, the power is in the range between 20 to 30 W, where the welding quality is quite good. In the excess heat input region, the power is greater than 30 W, where the welding quality is poor because the blowhole and the gas hole are generated on the surface. In the normal welding region, the embedded depth can be controlled by the different force during welding process.
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