Microstructural aspects and oxidation behavior of laser surface cladded silicon-containing stainless steels
- National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Materials Science and Engineering
It is known that silicon is a strong ferrite stabilizer for stainless steels (SS). The beneficial effect of silicon on enhancing mechanical properties, aqueous corrosion resistance and high temperature oxidation resistance of stainless steels is also well recognized. Therefore, the alloying of silicon to stainless steels is of great interest to researchers. By employing a laser surface alloying technique, Tsai et al. have successfully demonstrated that silicon addition to stainless steels, either austenitic or ferritic, could be achieved. They have found that silicon contents as high as 20 wt% could be produced by laser surface alloying (LSA). Laser surface cladding (LSC) of nitrogen and silicon containing stainless steels on carbon steel has also been reported. In these studies, the use of Si{sub 3}N{sub 4} was essential to silicon alloying. For both LSA and LSC alloys, their properties are dependent upon the chemical compositions and microstructures. In the present investigation, silicon-containing stainless steels produced by laser melting of the Fe-Cr-Ni-Si mixed powders on carbon steel is attempted. The chemical composition and the microstructure of the LSC layers produced are analyzed. The oxidation behavior of the laser cladded stainless steels with different silicon content is also examined.
- Sponsoring Organization:
- National Science Council, Taipei (Taiwan, Province of China)
- OSTI ID:
- 611561
- Journal Information:
- Scripta Materialia, Vol. 38, Issue 4; Other Information: PBD: 13 Jan 1998
- Country of Publication:
- United States
- Language:
- English
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