基于d电子理论的轻质Nb-Ti高温合金设计  

Alloy Design of Low-Density Nb-Ti Superalloy Based on d-Electrons Theory

作　　者：孔金涛[1] 胡锐[1] 寇宏超[1] 李金山[1] 郑欣[2] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]西北有色金属研究院,陕西西安710076

出　　处：《稀有金属材料与工程》2015年第5期1119-1123,共5页Rare Metal Materials and Engineering

基　　金："111"引智计划(B08040)

摘　　要：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 the d-electrons theory for designing Nb-base alloys was analyzed. The Md parameter was improved and verified. Furthermore, the low-density Nb-Ti alloy system was calculated and designed. The results show that solid solution W, Mo, Zr, Hf,and Ta are the most effective alloying elements to strengthen the Nb-base alloy. The strengthening effect by adding W element is better than that by the same amount of Mo element. With the increasing of Ti content in Nb-base alloy, the high-temperature strength of the alloy deceases. Considering the alloy density, high-temperature strength, oxidation resistance and other factors, an optimal composition was obtained： 65.95Nb-17Ti-3Al-4Cr-5V-2W-1.5Mo-1.5Hf-0.05C（wt%）.

关 键 词：轻质Nb-Ti高温合金 合金设计 d电子理论 

分 类 号：TG132.3[一般工业技术—材料科学与工程]