采用一种新型中间合金复合细化剂,在常规生产工艺条件下对高温合金K4169铸件进行了晶粒细化.测试了常规工艺和细晶铸造工艺两种试样的常温和中温(700℃)条件下的低周疲劳性能.结果表明,这一新型工艺方法能有效细化高温合金K4169晶粒.细晶试样的室温低周疲劳性能有较大的提高,且数据的分散性有所改善;在中温时,疲劳寿命的优劣和疲劳应变幅有关:在小应变幅条件下,细晶仍然有较高的疲劳寿命,在大应变幅条件下,细晶疲劳寿命比粗晶有所降低,但数据的稳定性较好.
参考文献
| [1] | 刘发信.高温合金细晶铸造技术的发展和应用[J].材料工程,1995(05):7. |
| [2] | MONDOLFLF.Grain refinement in the casting of nonferrous Alloys[A].New York: The Metallurgical Society of AIME,1983:3-50. |
| [3] | DENZINEAF.Advanced casting Technology[A].Paris:Advisory Group for Aerospace Research and Development,1982:12-16. |
| [4] | 熊玉华 .K4169高温合金化学法晶粒细化工艺及机理的研究[D].西北工业大学,2000. |
| [5] | WOULDSM.BENSON H Development of a conventional fine grain process[A].New York: Met Soc TMS-AIME,1984:3-12. |
| [6] | OUSEGK.Mechanical properties of microcast-x alloy 718 fine grain investment casting[A].Pittsburgh:TMS,1989:69-73. |
| [7] | DENNISONJP.Grain refinement by the introduction to the melt of oxide particles pre-dispersed in metal strip[A].New York: The Metallurgical Society of AIME,1983:139-149. |
| [8] | 熊玉华,李培杰,杨爱民,严卫东,曾大本,刘林.铸造工艺参数和细化剂对K4169高温合金铸态组织的影响Ⅰ.晶粒组织及晶粒细化机理[J].金属学报,2002(05):529-533. |
| [9] | 刘林.镍基高温合金铸件的晶粒组织控制铸造工艺参数的影响[J].航空学报,1994(11):1357. |
| [10] | GAUTHIERP;DE RABAUDY H;AUVINET J .Secondarycrackingprocessduringfatiguecrackpropagation[J].Engineering Fracture Mechanics,1973,5(04):977-981. |
| [11] | SYMPOSIUMNPL;STATIONAR H M.The relation between the structure and mechanical properties of metals[M].London:Her Majestys Stationary Office,1963:122. |
| [12] | NILSSONJO;THORVALDSSON T .Lowcycle-fatiguebehaviourofalloy800hat600℃-effectofgrainsizeandγ-precipitatedispersion[J].Fatigue and Fracture,1985,8(04):373. |
| [13] | 陈国良.高温合金学[M].北京:冶金工业出版社,1987:142-144. |
| [14] | 陈国祥;许静君.K18高温合金低周疲劳性能影响因素的研究[A].北京:中国科学技术出版社,1993:188-193. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%