含Hf和Ta新型鎳基高溫合金粉末中碳化物相

吳凱; 劉國權; 胡本芙; 吳昊; 張義文; 陶宇; 劉建濤

doi:10.13374/j.issn1001-053x.2010.11.016

含Hf和Ta新型鎳基高溫合金粉末中碳化物相

doi: 10.13374/j.issn1001-053x.2010.11.016

吳凱¹,
劉國權^1,2,
胡本芙¹,
吳昊¹,
張義文^3,4,
陶宇⁴,
劉建濤⁴

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 北京科技大學新金屬材料國家重點實驗室, 北京 100083;
3. 北京科技大學冶金與生態工程學院, 北京 100083;
4. 鋼鐵研究總院高溫材料研究所, 北京 100081

基金項目:

國家高技術研究發展計劃資助項目(No.2007AA03A223)

國家預研基金資助項目(No.9140A12070507QT0202)

詳細信息

作者簡介:
吳凱(1984-),男,博士研究生;劉國權(1952-),男,教授,博士生導師,E-mail:g.liu@ustb.edu.cn

中圖分類號: TG132.3⁺2
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- 被引次數: 0
出版歷程
- 收稿日期: 2010-03-09

Carbides in a new type Hf-Ta-containing nickel-based superalloy powder

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;
3. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
4. High Temperature Materials Research Institute, Central Iron&Steel Research Institute, Beijing 100081, China

摘要

摘要: 對含Hf和Ta新型鎳基高溫合金FGH98Ⅰ等離子旋轉電極(PREP)霧化原始和不同溫度下預熱處理粉末中的碳化物相進行了研究.結果表明:原始粉末中MC'型碳化物可分為兩類,一類為富Ti、Ta和Nb,另一類為含Ta、Hf和Zr.兩類碳化物均含有一定量非碳化物形成元素Co和Ni及中等強碳化物形成元素Cr和Mo,并以塊狀、粒狀分布于枝晶或胞晶間;隨著預熱處理溫度升高,粉末中富Ti、Ta和Nb的MC'型碳化物轉變為MC型碳化物,且其所含Ti、Ta和Nb的總量增大;含Ta、Hf和Zr的MC'型碳化物發生分解和轉變,析出穩定的M₂₃C₆、M₆C和MC型碳化物,M₂₃C₆碳化物的析出和溶解溫度為950℃和1150℃,M₂₃C₆和M₆C碳化物共存溫度為1000～1100℃.另外,粉末中微量元素Hf和Ta主要以碳化物和γ'相參與碳化物反應.
- 高溫合金 /
- 粉末 /
- 預熱處理 /
- 碳化物
Abstract: Carbides in new type Hf-Ta-containing nickel-based superalloy FGH98 Ⅰ powders prepared by plasma rotating electrode processing(PREP) before and after pre-heat treatment at different temperatures were studied.The results show that MC' type carbides in the initial powders can be divided into two groups.One is rich in Ti,Ta,Nb and the other contains the elements of Ta,Hf and Zr.The two types of carbides both contain a certain amount of non-carbide forming elements(Co,Ni) and medium carbide forming elements(Cr,Mo),and these carbides locate between interdendrites or cells and in block and granule shapes.Ti-Ta-Nb riched MC' type carbides in the powders can be transformed into MC type carbides and the total amount of Ti-Ta-Nb increases with increasing pre-heat treatment temperature.The Ta-Hf-Zr contained MC' type carbides can be decomposed and transformed into M₂₃C₆,M₆C and MC type carbides.It is also shown that the precipitate and dissolution temperatures of M₂₃C₆ type carbides are 950℃ and 1150℃ respectively,and the co-existing temperature of M₂₃C₆ and M₆C type carbide is within the range from 1000℃ to 1100℃.In addition,trance elements Hf and Ta in the powders take part in the reactions of carbides mainly in the form of carbides and γ' phases.
- superalloys /
- powders /
- preheating /
- carbides