チタンのろう付とその応用（チタン製熱交換器の製作）

概要

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Titanium and titanium alloys have been successfully used for many applications. On the other hand, joining is understood to be one of the most important processes involved in making products. Many joining processes have been established and employed in industrial fields. Of these processes, brazing in particular is useful for the joining complex or precision parts. In order to do brazing work, it requires not only to have knowledge of brazing technology, but also to be familiar with all properties of brazed materials itself. In this paper, it is explained about titanium and how to braze titanium. Brazing titanium has been thought unreliable because there were no sufficient brazing filler metals that can successfully resist chloride attack. Prof. T. Onzawa developed titanium based brazing filler metals with low melting point in his prior study and these filler metals showed excellent in joint strength and corrosion resistance. We carefully investigated those filler metals and chose appropriate one for brazing heat exchanger. Then all titanium heat exchanger was made by brazing as one of the examples of titanium brazing work.
電気製鋼研究会の論文