Erosion behaviour of hydro turbine steels

Bulletin of materials science

Satya Prakash¹  D B Goel¹  Akhilesh K Chauhan¹ 

[1] Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee 247 667, India$$Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee 247 667, IndiaDepartment of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee 247 667, India$$

关键词: in situ strain hardening;    solid particle erosion;    tensile toughness;    13/4 martensitic stainless steel;    21â€�??4â€�?�N nitronic steel.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The martensitic stainless steel (termed as 13/4) is currently being used for fabrication of underwater parts in hydroelectric projects. There are, however, several maintenance problems associated with the use of this steel. A nitronic steel (termed as 21�??4�?�N) has been developed as an alternative with the specific aim of overcoming these problems. A comparative study has been made on the erosion behaviour of 13/4 and 21�??4�?�N steels by means of solid particle impingement using gas jet. The eroded surfaces after erosion tests were analysed by scanning electron microscopy. It is observed that the 21�??4�?�N nitronic steel possesses better resistance to erosion in comparison to 13/4 martensitic stainless steel. The austenitic matrix of the nitronic steel possesses high hardness, high tensile toughness and work hardening ability, which results in higher erosion resistance.

【 授权许可】

Unknown