张朝,储茂友,沈剑韵,刘宇阳,白雪.CALPHAD技术在Co基粘结层合金制备中的应用[J].稀有金属材料与工程,2020,49(5):1657~1664.[Zhang Zhao,Chu Maoyou,Shen Jianyun,Liu Yuyang,Bai Xue.Application of CALPHAD Method in the Preparation for Co-based Bond Coating Alloys[J].Rare Metal Materials and Engineering,2020,49(5):1657~1664.]
CALPHAD技术在Co基粘结层合金制备中的应用
投稿时间:2019-03-25  修订日期:2019-05-27
中文关键词:  CALPHAD  Co基粘结层合金  材料设计  热处理
基金项目:
中文摘要:
      利用CALPHAD方法预测了Co基粘结层合金元素对相组成的影响,计算结果表明:Al对β`和γ相的析出量影响显著,Cr对σ相的析出量影响显著,从而确定了Al和Cr元素合适的成分范围分别于13%和22%附近。在此基础上计算了设计成分合金的相组成随温度的变化规律,结果表明:合金于1 208 ℃开始从基体β`相中析出γ相,974 ℃时,γ含量达到最高,随后将析出脆性的σ相。依据此相转变规律建议给出了合金的热处理工艺,1 300 ℃固溶,结合1 000 ℃时效处理。采用真空感应熔炼制备合金样品,铸态合金经上述热处理后得到β`+γ的两相组织,合金元素的偏析明显改善,非晶组织基本消除,得到较为理想的热障涂层粘结层用Co基合金靶材。
Application of CALPHAD Method in the Preparation for Co-based Bond Coating Alloys
英文关键词:CALPHAD  Co-based bond coating alloy  material design  heat treatment
英文摘要:
      The effects of alloying elements on phase equilibria in Co-based bond coating alloys are predicted by CALPHAD method. The results show that Al significantly influences on the precipitation amounts of β` and γ, and Cr has a definite effect on the precipitation of σ. The appropriate contents of Al and Cr elements are determined to be around 13% and 22%, respectively. The results of calculated phase formations and phase changes as a function of temperature are extensively discussed, which indicats that γ begins to precipitate from the matrix β` at 1208 ℃ and reaches the highest content at 974 ℃, then the σ will precipitat. According to the phase transformation, the heat treatment process of the alloy was formulated, dissolved at 1300 ℃ and aged at 1 000 ℃. The alloy samples were prepared by vacuum induction melting. Segregation and the amorphous structure in as-cast alloys was eliminated after the above heat treatment, and the two-phase structure, β`+ γ, of the commercial target is obtained.
作者单位E-mail
张朝 北京有色金属研究总院 westlive@outlook.com 
储茂友 北京有色金属研究总院 chumaoyou@163.com 
沈剑韵 北京有色金属研究总院  
刘宇阳 北京有色金属研究总院  
白雪 北京有色金属研究总院  
摘要点击次数: 56
全文下载次数: 95
查看全文  查看/发表评论  
关闭