Abstract

The structure and mechanical properties of the 36NKhTYu8M alloy subjected to quenching in nitrogen at a high pressure are studied by electron-probe microanalysis, X-ray diffraction, optical microscopy, mechanical tests, and durometry. The data obtained demonstrate that the highest mechanical properties (ultimate tensile strength, yield strength, apparent elastic limit) are achieved upon nitrogen quenching from an optimum heating temperature of 1025°C and subsequent aging at 750°C for 3.5 h. As compared to water quenching and subsequent aging, the strength and elastic properties are higher in this case by 10 and 18%, respectively. This difference is explained by the fact that a hardening phase preliminarily precipitates during slow gaseous quenching. As a result, the decomposition of the solid solution during subsequent aging is facilitated and higher mechanical properties are achieved.

中文翻译：

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高压氮气淬火对36NKhTYu8M精密弹簧合金组织和性能的影响

摘要

通过电子探针显微分析，X射线衍射，光学显微镜，力学测试和硬度测试，研究了在高压下在氮气中淬火的36NKhTYu8M合金的结构和力学性能。获得的数据表明，在1025°C的最佳加热温度下进行氮气淬火并随后在750°C进行3.5小时的老化后，可获得最高的机械性能（最终的拉伸强度，屈服强度，表观弹性极限）。与水淬和随后的时效相比，在这种情况下，强度和弹性性能分别提高了10％和18％。这种差异可以通过以下事实来解释：在缓慢的气态淬火过程中，硬化阶段会初步析出。结果是，