东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (12): 1335-1338.DOI: -

• 论著 • 上一篇    下一篇

大型水轮机叶片马氏体不锈钢的超声空蚀行为

张小彬;刘常升;朱杰;郑玉贵;   

  1. 东北大学材料各向异性与织构教育部重点实验室;东北大学材料各向异性与织构教育部重点实验室;东北大学材料各向异性与织构教育部重点实验室;中国科学院金属研究所金属腐蚀与防护国家重点实验室 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110016
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-12-15 发布日期:2013-06-23
  • 通讯作者: Zhang, X.-B.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2003AA331170)

Cavitation erosion behavior of martensitic stainless steel for hydraulic turbine blades

Zhang, Xiao-Bin (1); Liu, Chang-Sheng (1); Zhu, Jie (1); Zheng, Yu-Gui (2)   

  1. (1) Key Laboratory for Anisotropy and Texture of Material, Northeastern University, Shenyang 110004, China; (2) State Key Laboratory for Corrosion and Protection, Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-12-15 Published:2013-06-23
  • Contact: Zhang, X.-B.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

636

摘要： 利用超声振荡空蚀设备研究了一种大型水轮机马氏体不锈钢合金成分调整前后在蒸馏水和模拟长江水中的空蚀行为.观察空蚀表面形貌,结合力学性能,与普通13-4不锈钢进行对比分析.研究结果表明:3种不锈钢的显微组织由马氏体、铁素体和残余奥氏体组成;降低C,S,Si增加Ni,Mo,Mn并且经过精炼工艺改进后,不锈钢抗空蚀能力高于原合金和13-4不锈钢.调整后不锈钢的空蚀稳定期失重率小于7 mg/h,仅约为原合金的75%和13-4不锈钢的25%.在空蚀过程中,较软的铁素体相首先脱落,其次是较硬的马氏体相,并且观察到了清晰的空蚀表面疲劳源形貌.

关键词: 水轮机叶片, 马氏体不锈钢, 空蚀, 失重, 疲劳

Abstract: Cavitation erosion behavior of two kinds of martensitic stainless steel used for hydraulic turbine blades was investigated in distilled water and simulated Yangtze River water through an ultrasonic vibration system. The microstructure and the eroded surface morphology were observed by SEM and EM, and the results were in contrast with those of 13-4 stainless steel. The results showed that the microstructures of all the three kinds of stainless steels consist of martensitic matrix, ferrite and residual austenite. After refining with C, S and Si decreased and Ni, Mo and Mn increased, the stainless steel has an obviously higher resistance to cavitation erosion than that of original stainless steel and 13-4 stainless steel. The weight loss of the new type alloy due to stable cavitation erosion is less than 7 mg/h, i.e., about 75% of the original stainless steel and 25% of 13-4 stainless steel. During the cavitation erosion, the soft ferrite phase drops out form martensitic matrix first and then the hard martensite, and the surface morphology of fatigue source was thus observed clearly.

中图分类号: