2 results listed
During the cutting process, this arc occasionally occurs between the throttle nozzle and the electrode and is distorted in the form of the exit hole of the plasma for other reasons. Distortion in the form of the plasma flow hole disturbs the plasma arc and the compressed air flow surrounding the plasma arc, which in turn affects the cutting quality negatively. In this study, we investigated the possibility of reusability(recycling) by filling the wear parts of worn down nozzles with silver containing solders. For this purpose, the wear zones were machined to a diameter 6 mm and a depth of 3 mm, and then solder fillings containing silver were made on the region discharged by oxy-gas flame. The filling area was machined by original drilling with a diameter of 1.6 mm. Throttle nozzle filled with solders containing silver, 2%, 20% and 40% were used for cutting 5 mm thick sheets. Cutting operations of 1 meter length were carried out at a cutting speed of 1 m/min at a current of 50 amperes and a material loss per 10 meters was measured weight and geometrically. The results obtained were compared with the material losses in the copper throttle nozzles.
International Conference of Advanced Materials and Manufacturing Technologies
ICAMT
Ozkan Eski
Ayse Yayli Eyuboglu
Serkan Islak
In this study, the effects of boron carbide (B4C) addition on mechanical and physical properties such as microstructure, hardness and density of hot pressed copperboron carbide (Cu-B4C) composites were investigated. To improve the mechanical properties of commercial copper (C) powders having a particle size of 40μm, B4C having a particle size of 40μm, of 2,5, 5, 7,5, 10% by weight was added. Cu-B4C composites were sintered to argon atmosphere at 6500C, 7500C and 8500C for 4 minutes. The electrical conductivity values of the sintered products were measured after examination with the presence of B4C, optical microscope, X-ray diffraction analysis technique and SEM-EDS. In the images obtained, B4C was found to be homogeneously dispersed in the copper matrix. As the ratio of B4C increased, the hardness of the composites increased and the density decreased.
International Conference of Advanced Materials and Manufacturing Technologies
ICAMT
Ozkan Eski
Serkan Islak
Cigdem Urayli