吴刚,王涛,沈剑韵,魏杰,吴波,黄永章,袁学韬.相图计算辅助新型Co基变形高温合金的成分设计[J].稀有金属材料与工程,2021,50(1):235~241.[Wu Gang,Wang Tao,Shen Jianyun,Wei Jie,Wu Bo,Huang Yongzhang,Yuan Xuetao.Composition Optimization Design for Novel Co-based Deformed Superalloy Aided by Phase Diagram Calculation Approach[J].Rare Metal Materials and Engineering,2021,50(1):235~241.]
相图计算辅助新型Co基变形高温合金的成分设计
投稿时间:2020-02-14  修订日期:2020-03-06
中文关键词:  Co-Al-W基变形高温合金  相图计算(CALPHAD)  成分设计  
基金项目:
中文摘要:
      为了确定Co-Al-W-Ni-Ta-Ti体系新型γ′强化的Co-Al-W基变形高温合金的成分及相应的热处理工艺,利用Pandat计算软件及钴基高温合金热力学数据库,计算了合金元素对平衡相析出行为的影响,计算表明:W、Ni、Ta及Ti均能提高γˊ的稳定性,W、Ta会增加有害相χ-D019的析出倾向,Ti和Ni能分别抑制有害相χ-D019和B2相的析出,将合金成分定为Co-9Al-3W-30Ni-2Ta-3.5Ti(at%)。计算了此合金的相转变规律,结果表明:合金的平衡析出相为γ、γˊ、χ-D019和Co7Ta2,开始析出温度分别为1355℃,1169℃,700℃和288℃。制定了合金的热处理制度:1250℃/12h均匀化,1150℃/6h固溶处理,900℃/4h+750℃/16h两步时效处理。采用真空感应熔炼制备了合金样品,经上述热处理后,DSC分析结果与计算的相转变规律一致,SEM及XRD结果表明,合金中的平衡相为典型的γ+γˊ两相组织。
Composition Optimization Design for Novel Co-based Deformed Superalloy Aided by Phase Diagram Calculation Approach
英文关键词:Co-Al-W-based wrought superalloy  calculation of phase diagram(CALPHAD)  composition design  
英文摘要:
      In order to determine the composition of the novel γ′ strengthened Co-Al-W-based wrought superalloy of the Co-Al-W-Ni-Ta-Ti system and the corresponding heat treatment process, using Pandat calculation software and the thermodynamic database of cobalt-based superalloys, The influence of alloying elements on the precipitation behavior of the equilibrium phase was calculated. The calculations showed that: W, Ni, Ta, and Ti can improve the stability of γˊ, W, Ta can increase the precipitation tendency of the harmful phase χ-D019, and Ti and Ni can be suppressed the precipitation of the harmful phases χ-D019 and B2 phase respectively, the alloy composition was determined as Co-9Al-3W-30Ni-2Ta-3.5Ti (at%). The phase transition law of this alloy was calculated, and the results showed that the equilibrium precipitation phases of the alloy were γ, γˊ, χ-D019 and Co7Ta2, and the initial precipitation temperatures were 1355 °C, 1169 ° C, 700 ° C, and 288 ° C, respectively. The alloy heat treatment process was formulated: 1250℃/12h homogenization, 1150℃/6h solution treatment, 900℃/4h + 750℃/16h two-step aging treatment. The alloy samples were prepared by vacuum induction melting. After the above heat treatment, the DSC analysis results are consistent with the calculated phase transition rules. SEM and XRD results show that the equilibrium phase of the alloy is typical γ + γˊ two-phase structure.
作者单位E-mail
吴刚 有研科技集团有限公司生物冶金国家工程实验室 北京 有研资源环境技术研究院北京有限公司 15671684048@163.com 
王涛 中国航发北京航空材料研究院先进高温结构材料重点实验室  
沈剑韵 有研科技集团有限公司生物冶金国家工程实验室 北京 有研资源环境技术研究院北京有限公司  
魏杰 有研科技集团有限公司生物冶金国家工程实验室 北京 有研资源环境技术研究院北京有限公司  
吴波 福州大学材料科学与工程学院  
黄永章 有研科技集团有限公司生物冶金国家工程实验室 北京 有研资源环境技术研究院北京有限公司 yongzhanghuang@163.com 
袁学韬 有研科技集团有限公司生物冶金国家工程实验室 北京 有研资源环境技术研究院北京有限公司 yuanxt@grinm.com 
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