摘要:
The present invention relates to an arc ion plating device utilizing a vacuum arc discharge to be utilized for the surface process of works and to an arc ion plating system provided with the above-mentioned device, and the present invention offers the device and the system which are able to realize extremely high productivity by an efficient handling of works. The device according to the present invention comprises a rod-shaped evaporation source and works to be coated with a film being disposed so as to surround the rod-shaped evaporation source, The device is so constituted that the works can be moved relative to the rod-shaped evaporation source in the axial direction of the rod-shaped evaporation source.
摘要:
One object of the present invention is to provide a production method for a nuclear fuel assembly support grid that improves the corrosion resistance of welded parts without impairing the characteristics of the support grid so as to be able adequately withstand highly efficient operation. In order to achieve the object, the present invention provide a production method for a nuclear fuel assembly support grid comprising the steps of: assembling a plurality of straps in a grid form; welding intersections of each strap; and carrying out annealing thereafter to precipitate an intermetallic compound on the welded parts.
摘要:
A zirconium alloy containing on weight basis, 0.4-1.2% tin, 0.2-0.4% iron, 0.1-0.6% chromium, not higher than 0.5% of niobium and balance oxygen and zirconium, wherein the sum of weight proportions of tin, iron and chromium is in the range from 0.9 to 1.5%; and a zirconium alloy as above wherein the proportions, expressed by weight %, of tin X.sub.Sn, iron X.sub.Fe, chromium X.sub.Cr, niobium X.sub.Nb and oxygen X.sub.o satisfy the equation0.18 X.sub.Sn +0.15(X.sub.Fe +X.sub.Cr)+0.13X.sub.Nb +4.72X.sub.o .gtoreq.0.95.