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分析了d电子理论在铌基合金中的适用性,改进了Md参数并进行了验证,对轻质铌钛合金系统进行了设计计算。结果表明:固溶强化铌基合金最为有效的元素主要包括W、Mo、Zr、Hf、Ta,铌基合金中加入相同原子分数的W元素的强化效果优于Mo元素;铌基合金中Ti元素的含量增多,会降低合金的高温强度;综合考虑合金密度、高温强度、抗氧化性等因素,通过d电子理论设计出轻质铌钛合金的最优参考组分为(质量分数,%):65.95Nb-17Ti-3Al-4Cr-5V-2W-1.5Mo-1.5Hf-0.05C。
The applicability of d electron theory in niobium based alloys was analyzed, the Md parameters were improved and verified, and the design and calculation of light niobium titanium alloy system was carried out. The results show that the most effective elements of the solid solution strengthened niobium-based alloy include W, Mo, Zr, Hf, Ta. The strengthening effect of W element with the same atomic fraction is better than that of Mo element in niobium- The optimal reference component of light niobium-titanium alloy is (mass fraction,%) based on d-electron theory considering the factors such as alloy density, high temperature strength and oxidation resistance. 65.95Nb-17Ti-3Al-4Cr-5V-2W-1.5Mo-1.5Hf-0.05C.