| 摘要 |
<p>PURPOSE:To improve the nitric acid resistance and joint performance of a joining part by interposing a Ta-Cr alloy between both base metals in case of manufacturing the dissimilar material joint of Zr, Ti, etc., and an austenite stainless steel. CONSTITUTION:In the case of manufacturing the dissimilar material joint of Zr, Zr alloy, Ti, Ti alloy and an austenite stainless steel, if diffusion joining is performed without an intermediate material an intermetallic compound is caused at the joining part of both members. That part is therefore corroded preferentially. In order to restrain the formation of the intermetallic compound the diffusing joining is performed by interposing the alloy foil 3 of Ta-Cr be tween a Zr base metal 1 and the austenite stainless steel base metal 2, for instance. The alloy 3 of this component group has an eutectic point and its m.p. becomes lower, so the mutual diffusion is easy to be performed. Moreover, the Ta-Cr alloy foil 3 is entered into solid solution of the component of both base metals at the total rate, so no intermetallic compound is formed at the joining part.</p> |
