| Project/Area Number |
04452273
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属加工(含鋳造)
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
KISHITAKE Katsuhiko Kyushu Instute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (40029880)
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| Co-Investigator(Kenkyū-buntansha) |
ERA Hidenori Kyushu Instute of Technology, Faculty of Engineering, Associtate Professor, 工学部, 助教授 (00127987)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1992: ¥5,200,000 (Direct Cost: ¥5,200,000)
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| Keywords | plasma spraying / amorphous phase / high-carbon iron alloy / crystallization / 高炭素鉄系合金 / 高温耐摩耗材料 / 急冷凝固 |
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| Research Abstract |
Fe-Cr-Mo alloys containing a large amount of carbon and/or boron were plasma sprayd under reduced pressure. All the sprayd coatings are amorphous and show a high hardness of 800 to 1000 DPN.The amophous coatings crystallize at about 773 K or more. Very fine carbides, borocarbides or borides precipitate in the matrix of chi phase and/or ferrite after crystallization of the amorphous phase ; bringing about a very high hardness of 1300 to 1450 DPN.The anodic polarization behavior of the as-sprayd amorphous coatings exhibits the activation-passivation transition in 1N H_2SO_4 solution. The active and passive current densities of the coatings increase with increasing boron content of the alloy. The corrosion resistance of the coating containing no boron is superior to SUS316L stainless steel coating.
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