2013 Fiscal Year Final Research Report
Surface structure control of ferrous materials by non-equilibrium phases of low temperature plasma treatment
| Project/Area Number |
23560873
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
EGAWA Motoo 地方独立行政法人大阪府立産業技術総合 研究所, 金属表面処理科, 主任研究員 (30359426)
UEDA Nobuhiro 地方独立行政法人大阪府立産業技術総合 研究所, 金属表面処理科, 主任研究員 (90359365)
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| Project Period (FY) |
2011 – 2013
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| Keywords | plasma / S phase / stainless steel / nitriding / carburizing / surface hardening |
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| Research Abstract |
A surface hardening method was established for austenitic stainless steels without degradation of anticorrosion properties. It was clarified that the hardening is occurred by the increase of supersaturated interstitial concentration, which expands the lattice, the expansion induces the more super saturation of interstitials. The depth of the hardened surface layer can be thickened by effective additional substitutional elements.
Further structure formation was tried by combination of DLC coating. Adhesion of the DLC coating to hardened S phase was clarified. It also clarified that the excess surface condensation formed at the surface of a duplex layer structure by carbon and nitrogen diffusion can be removed effectively by specific Ar plasma irradiation conditions.
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