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RESEARCH AND DEVELOPMENT OF PROCEDURES FOR JOINING OF SIMILAR AND DISSIMILAR HEAT-RESISTING ALLOYS BY ULTRASONIC WELDING

机译:超声波焊接加工类似和不合格耐热合金的工艺研究与开发

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An investigation was conducted to apply ultrasonic welding to joining similar and dissimilar heat-resisting alloys and to study the fundamentals of this process.nUltrasonic spot welds were made in various combinations of heat-resisting alloys. Room temperature tension-shear and cross-tension strengths were obtained for each combination. Metallographic examinations of the heat-resistant weldments showed the presence of cracks at the edges of many of the spot welds. This cracking is probably caused by high cyclic stresses at the edge of the weld producing fatigue failures in this area. Methods of preventing such cracking can probably be determined.

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