高温合金稀土细化剂的选择及实验研究

发布时间：2018-01-15 23:20

  本文关键词：高温合金稀土细化剂的选择及实验研究　出处：《中国稀土学报》2015年06期 　论文类型：期刊论文

  更多相关文章： 稀土金属间化合物 高温合金 细化剂 晶粒

【摘要】：依据高熔点、密度相近和晶格匹配等原则,利用自编高温合金细化剂选取系统,分别甄选出YNi_2Si_2和CeCo_4B两种三元稀土金属间化合物。采用氩弧熔敷的方法,两种稀土金属间化合物分别作为敷材,K4169高温合金作为基材,形成公共熔池并凝固,组织观察发现含Ce和含Y稀土金属间化合物均对基材γ相枝晶生长具有一定的抑制作用;直接浇注试棒铸件实验表明:采用混合稀土细化剂,1470℃浇注,K4169高温合金试样平均晶粒组织由未添加细化剂的3.57 mm降为添加细化剂的0.92 mm。
[Abstract]:According to the principles of high melting point, close density and lattice matching, the system of selecting superalloy refiner is used. Two ternary rare earth intermetallic compounds, YNi_2Si_2 and CeCo_4B, were selected respectively, and the two rare earth intermetallic compounds were used as materials by argon arc deposition. K4169 superalloy was used as substrate to form common melting pool and solidify. It was found that the intermetallic compounds containing ce and Y could inhibit the growth of 纬 phase dendrite. The direct casting experiment shows that the mixed rare earth refiner is used at 1470 鈩，

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