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Accession number;05A0443662
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| Title;Effect of chemical composition on microstructure and characteristics of high chromium Ni-hard cast iron |
| Author;
KUBO OSAMU
(Nittetsuhaipametaru)
ISHIBASHI SHUJI
(Nittetsuhaipametaru)
KOIE TAKAYUKI
(Nittetsuhaipametaru)
MATSUBARA YASUHIRO
(Kurume National Coll. Technol., JPN)
KISHITAKE KATSUHIKO
(Kyushu Inst. Technol., JPN)
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Journal Title;Journal of Japan Foundry Engineering Society
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Journal Code:G0096A
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ISSN:1342-0429
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VOL.77;NO.5;PAGE.293-300(2005)
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| Figure&Table&Reference;FIG.14, TBL.6, REF.11 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Effect of chemical composition on the microstructure and characteristics of Ni-hard cast iron has been investigated in order to improve the wear resistance and other material properties by precipitation of hard M7C3 carbide and graphite. A small amount of graphite and M7C3 type carbide crystallize together in the cast iron of the composition of 2.6mass%C-7.0mass%Cr. The volume fraction of graphite increases with an increase in carbon content. Nickel has a strong effect on the transformation of matrix and the highest hardness is obtained in the cast iron containing 5.0mass%Ni in as-cast state, because of the transformation of austenite to martensite. Tensile strength decreases as carbon content gets over 2.6mass%. Heat crack length is the shortest in the cast iron of 2.6mass%C, and wear loss and amount of sticking decrease with increasing chromium and molybdenum contents. It was found that the optimum chemical composition of high chromium Ni-hard cast iron containing M7C3 type carbide and a small volume fraction of graphite is 2.6mass%C-2.5mass%Si-5.0mass%Ni-7.0mass%Cr-2.4mass%Mo, to improve the wear resistance remaining good mechanical properties of conventional Ni-hard cast iron. (author abst.) |
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