钛合金热稳定性研究  Ⅲ.热稳定性判据及其应用

金属学报

1984, Vol. 20

Issue (6): 391-397

论文

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钛合金热稳定性研究 Ⅲ.热稳定性判据及其应用

李东;万晓景

中国科学院金属研究所;中国科学院金属研究所

ON THE THERMAL STABILITY OF Ti ALLOYS Ⅲ. The Criterion for Thermal Stability and Its Application

LI Dong; WAN Xiaojing (Institute of Metal Research; Academia Sinica; Shenyang)(Manuscript received 4 November; 1983; revised manuscript 29 February; 1984)

引用本文:

李东;万晓景. 钛合金热稳定性研究 Ⅲ.热稳定性判据及其应用[J]. 金属学报, 1984, 20(6): 391-397.
, . ON THE THERMAL STABILITY OF Ti ALLOYS Ⅲ. The Criterion for Thermal Stability and Its Application[J]. Acta Metall Sin, 1984, 20(6): 391-397.

全文: PDF(518 KB)

摘要: Ti_3X相是影响钛合金热稳定性的重要因素。Ti_3X相沉淀和生长的倾向可用电子浓度值来描述。同时,合金脆化过程与暴露温度和时间因素有关。因此,可综合电子浓度,使用温度和时间因素加以考虑,确定一个允许的电子浓度值_p作为一个合金的热稳定性判据。热稳定性判别式可表示为∑N_if_i~a≤_p。判据具有明确的物理意义,它可以用作合金生产的质量控制标准和新的合金设计依据。若以合金元素对电子浓度的贡献来确定各合金元素的Al当量因子,则Rosenberg的经验Al当量公式应修改为1(％Al)+0.46(％Sn)+0.42(％Ga)+6.7(％O)≤8(wt-％)。

Abstract：The Ti_3X-phase is found to be an important factor influenced the thermal stability of Ti alloys. The tendency towards the precipitation and growth of Ti_3Xphase may be described as the value of electron concentration. A kinetics of the embrittlement process of the alloys, depending on the exposure temperature and time, has been confirmed. Taking three factors, including electron concentration, operating temperature and service time, into account, a permissible electron concentration, N_p, may be ascertained as criterion for the thermal stability of an alloy. The physical meaning of the criterion is definite. A proposal could be made that the criterion is available for the standard of quality control of the alloy production and in new alloy design. If the determination of the Al equivalent factors of various alloying elements was made by their contribution to electron concentration, the Rosenberg's empirical formula should be modified as follow: 1(％Al)+0.46(％Sn)+0.42(％Ga)+6.7(％0)≤8(wt-％)

收稿日期: 1984-06-18

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1 Shamblen, C. E., Metall. Trans., 2 (1971) , 277．
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3 李东;刘羽寅;万晚景,金属学报,20(1984) ,A375．
4 李东;刘羽寅;金属学报,20(1984) ,A384．
5 中国科学院金属研究所;冶金部沈阳有色金属加工厂;冶金部抚顺钢厂,未发表资料,1978．
6 中国科学院金属研究所;冶金部沈阳有色金属加工厂,冶金部抚顺钢厂;三机部六○六所,未发表资料,1980．
7 Shamblen, C. E.; Redden, T. K., Metall. Trans. 3 (1972) , 1299．
8 Rosenberg, H. W., The Science, Technology and Application of Titanium, Proc. of lst Int. Conf. on Titanium, Eds. Jaffee, R. L; Promisel, N. E., Pergamon, London, 1970, p. 851．

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