| 摘要 |
<p>The proposed fitting for use in welding stainless steel pipes with zirconium alloy pipes is designed as an overlap diffusion welded joint between sleeves (1, 2) made from metals corresponding to the metals of the pipes to be welded. The surrounding sleeve (2) of the fitting is made from stainless steel and the adjoining surfaces of the sleeves are provided along the entire length of the overlap with alternating projections and depressions (5, 6) which engage with one another. The overlap diffusion welded joint has a hard diffusion layer (7) of not more than 5 νm in thickness. The walls of the sleeves in the overlap region vary in thickness, so that the wall thickness of one sleeve decreases as that of the other increases, for example in steps, and the projections and recesses are annular. The fitting is used in nuclear technology and in chemical engineering as a bimetallic insert for use in welding stainless steel pipes with zirconium alloy pipes.</p> |
