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Abstract
This investigation covers the determination of the optimum spot welding conditions by 3 Phase LowFrequency Resistance Welder for lm.m. LCN-155 and Inconel Sheets.LCN-155 and Inconel are both heat-resistance alloys for high-temperature use. Particulary for jet engine parts. LCN-155 has low melting point and high resistivity. In this paper above unique properties and their effects on spot weld are discussed.Because there is no standard that specify the properties of spot weld of such heat-resistance alloys, U.S. Military specification is applied to determine whether the spot weld is acceptable or not.The procedure for welding and testing are outlined, and the results of tension-shear test for spot weld are shown and discussed.Since sufficient electrode force was not obtainable with the available resistance welder, spot welding with more than 1, 500kg electrode force was not carried out. And so, effects of insufficient electrode force are discussed.
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