金属学报  1987, Vol. 23 Issue (4): 299-305

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La在Ni-20Cr-20Co-18W高温合金中的分布及其对持久性能的影响

王延庆;魏育环;杨枬森

冶金工业部钢铁研究总院;冶金工业部钢铁研究总院;冶金工业部钢铁研究总院

DISTRIBUTION OF La IN SUPERALLOY Ni-20Cr-20Co-18W AND ITS INFLUENCE ON STRESS RUPTURE PROPERTY

by WANG Yanqing; WEI Yuhuan; YANG Nansen (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing) (Manuscript received 17 February; 1986; revised manuscript 9 August. 1986)

王延庆;魏育环;杨枬森. La在Ni-20Cr-20Co-18W高温合金中的分布及其对持久性能的影响[J]. 金属学报, 1987, 23(4): 299-305.
, , . DISTRIBUTION OF La IN SUPERALLOY Ni-20Cr-20Co-18W AND ITS INFLUENCE ON STRESS RUPTURE PROPERTY[J]. Acta Metall Sin, 1987, 23(4): 299-305.

摘要 参考文献 相关文章 Metrics 全文: PDF(1155 KB)   摘要: 本文对La在Ni-20Cr-20Co-18W高温合金中的分布及其作用进行了研究.发现La主要富集在晶界上;La显著增加合金在1000℃,39MPa条件下的持久寿命和延伸率以及蠕变激活能.用热蚀刻方法测量了合金的晶界能,用测量电阻率随温度变化的方法测量了合金的空位形成能.从理论上阐述了La降低晶界能和提高空位形成能的作用是改善合金持久性能的主要原因. Abstract：The distribution of La in a superalloy Ni-20Cr-20Co.-18W is found out to be enriched mainly along its grain boundaries as oxide and oxysulphide. Some of the oxide may be formed the nuclei of the carbide M_6C. The La improves significantly the stress rupture life under 39 MPa at 1000℃ and raises the creep activation energy of the superalloy. The grain boundary energy was evaluated by thermal etching technique and the vacancy formation energy was measured by temperature dependence of resistivity. A theoretical interpretation was made that the contribution of La to decreasing boundary energy and increasing the vacancy formation energy is the main causes of the improvement of stress rupture property of the superalloy. 收稿日期: 1987-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 王延庆 魏育环 杨枬森 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I4/299 1 钢铁研究院.新金属材料,1975;(5-6) :48-65 2 Viswanathan R. Corrosion, 1968; 24: 359-369 3 Bailey R E, Shiring R R, Anderson R J. In: Kear B H, Muzyka D R, Tien J K et al. eds., Superalloys: Metallurgy and Manufacture, Proc 3rd Int Symp on Superalloys, Baton Rouge: Claitor's, 1976: 109-118 4 Nagai H. Trans Jpn Inst Met, 1982; 23: 473-479 5 高唯,赵先存.国外金属材料,1982;(12) :20-27 6 Mortimer D A, Nicholas M G. Met Sci, 1976; 10: 326-332 7 魏育环,杨枬森,师燕瑜.钢铁研究总院学报,1984;4(1) :21-26 8 汪复兴主编.金属物理,机械工业出版社,1981;43-54 9 佘宗森,田中卓.金属物理,冶金工业出版社,1982:318 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed