The effect of boron on the wear behavior of iron-based hardfacing alloys for nuclear power plants valves
- Authors
- Yoo, Jeong Wan; Lee, Seong Hun; Yoon, Chong S.; Kim, Seon Jin
- Issue Date
- Jun-2006
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- I0500
- Citation
- JOURNAL OF NUCLEAR MATERIALS, v.352, no.1-3, pp.90 - 96
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NUCLEAR MATERIALS
- Volume
- 352
- Number
- 1-3
- Start Page
- 90
- End Page
- 96
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181401
- DOI
- 10.1016/j.jnucmat.2006.02.071
- ISSN
- 0022-3115
- Abstract
- The effect of boron of Fe-Cr-C-Si alloys, replacing Stellite 6 traditionally used in nuclear power industry, on the high temperature wear resistance was characterized. Sliding wear tests of Fe-Cr-C-Si-xB (x = 0.3, 0.6, 1.0 and 2.0 wt%) alloys were performed in air at temperatures ranging from 300 to 725 K under a contact stress of 103 MPa. Low-boron alloys containing less than 0.6 wt% boron showed the excellent wear resistance than any other tested alloys in an elevated temperature. The improvement was associated with the matrix hardening by promotion of the gamma -> alpha' strain-induced martensitic transformation occurred during wear. In addition, protective oxide layers formed on the contacting surface reduced the wear loss by minimizing the direct metal-to-metal contact. However, high-boron alloys containing more than I wt% boron showed somewhat larger amount of wear loss than low-boron alloys due to the absence of the strain-induced martensitic transformation and the presence of the brittle FeB particles connected with easy crack initiation.
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