通过疲劳升降法对汽轮机叶片钢2Cr11Mo1NiWVNbN在100℃下的疲劳强度(107)进行测定,分别用经验公式、Basquin模型和Langer模型对测定结果进行计算和验证.结果表明:2Cr11Mo1NiWVNbN钢在100℃下的条件疲劳极限为530 MPa,大于由经验公式计算的411 MPa,这是由于M23C6析出相弥散强化及Cr和Mo元素提高了钢的淬透性所致;Langer模型对条件疲劳极限的拟合结果比Basquin模型更接近实测值,且Langer模型拟合得到的不同存活率下条件疲劳极限的分散性较小,建议在计算2Cr11Mo1NiWVNbN钢的疲劳强度时采用Langer模型.
参考文献
| [1] | 王江洪,齐琰,苏辉,李劲松.电站汽轮机叶片疲劳断裂失效综述[J].汽轮机技术,1999(06):330-333. |
| [2] | 佐辉,崔海霞 .2Cr11Mo1NiWVNbN的研制开发[J].特钢技术,2007,13(51):1-3.Zuo H,Cui H X.Research and development of the 2Cr1 1Mo1 NiWVNbN steel[J].pecial Steel Technology,2007,13 (51):1-3.,2007. |
| [3] | Tang J,Zhao J .A practical approach for predicting fatigue reliability under random cycle loading[J].Reliability Engineering & System Safety,1995,50(1):7-10.,1995. |
| [4] | Ling J,Pan J .An engineering method for reliability analyses of mechanical structures for long fatigue lives[J].Reliability Engineering & System Safety,1997,56(2):135-142.,1997. |
| [5] | Ling J,Pan J .A maximum likelihood method for estimating P-S-N curves[J].International Journal of Fatigue,1997,19(5):415-418.,1997. |
| [6] | 束德林.工程材料力学性能[M].北京:机械工业大学出版社,2007:100-119.Shu D L.Mechanics Performance of Engineering Material[M].Beijing:China Machine Press,2007:100-119.,2007. |
| [7] | 孙茂才.金属力学性能[M].哈尔滨:哈尔滨工业大学出版社,2005:185-186.Sun M C.Mechanical Properties of Metals[M].Harbin:Harbin Institute of Technology Press,2005:185-186.,2005. |
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