一、前言众所周知,锆合金是水冷动力堆最好的包壳结构材料之一。它具有低的热中子吸收截石,适中的强度和优异的耐腐蚀性能。一种高强度Zr—2.5%Nb(重量%)合金作为动力堆压力管材料是令人满意的。淬火时效的Zr—2.5%Nb合金的强度比冷加工Zr—2合金的强度高50%左右,在水中的腐蚀性能也是允许的。但是该合金在空气和二氧化碳中的腐蚀性能很不 First, the preamble As we all know, zirconium alloy water power reactor is one of the best cladding material. It has low thermal neutron absorption stone, moderate strength and excellent corrosion resistance. A high-strength Zr-2.5% Nb (wt%) alloy is satisfactory as a power stack pressure tube material. The strength of the quenched and aged Zr-2.5% Nb alloy is about 50% higher than that of the cold-worked Zr-2 alloy, and the corrosion resistance in water is also allowable. However, the alloy is not very corrosive to air and carbon dioxide