We study the influence of modification of the surface layer of a metal in gaseous atmospheres on the long-term strength of Zr–1% Nb alloy at room temperature (20°С). It is discovered that the procedures of treatment in oxygen-containing (580°С; 1.33 Pa; 0.5 h under a pressure of 1.33∙10 –2 Pa , and τ = 2.5 h) and nitrogen-containing (580°С; 1.33∙10 – 3 Pa; 1 h under a nitrogen pressure of 1∙10 5 Pa , and τ = 9 h) atmospheres are accompanied by the formation of diffusion-hardened near-surface layers and lead to an increase in the long-term strength of annular specimens at room temperature on a base of 100 h as compared with the standard treatment in a vacuum (580°С; 1.33∙10 –2 Pa , and 3 h).

中文翻译：

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渗入杂质表面层改性对Zr-1% Nb合金长期强度的影响

我们研究了气体环境中金属表面层的改性对 Zr–1% Nb 合金在室温 (20°С) 下的长期强度的影响。发现在含氧（580°С; 1.33 Pa; 0.5 h，压力为1.33∙10 –2 Pa ，τ = 2.5 h）和含氮（580°С; 1.33∙ 10 – 3 Pa；在 1∙10 5 Pa 氮气压力下 1 h，τ = 9 h) 气氛伴随着扩散硬化的近表面层的形成，并导致长期强度增加与真空中的标准处理（580°С；1.33∙10 –2 Pa 和 3 小时）相比，室温下以 100 小时为基础的环形样品。