ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Two kinds of thick-walled rings, consisted of WCP/Fe-C gradient composites layers containingabout 54 and 70 vol.% of WCP and Fe-C alloy core, were cast by centrifugal casting method. The microstructure,mechanical properties and wear resistance of the gradient composites were investigated. Meanwhilethe results were compared with those made of the high speed steel. It was found that WCP in the twokind of gradient composites layers were even well distributed, WCP/Fe-C composites layer of 23-28mmwas obtained, the transition layer between the composites layer and matrix alloy core was perfect. Thetensile strengths of the two gradient composites layers achieved 345MPa, 460MPa and the impacttoughness were 4.6J/cm2, 6.2J/cm2 respectively. Moreover the hardness of the composites layers attainedHRA81 and HRA 78. The result of the comparison among the gradient composites layers and that made ofthe high speed steel showed that the wear resistance of the gradient composites layers containing about 50and 70 vol.% of WCP was more than 20 times higher than that of the high speed steel under loads of 100Nand 200N and sliding velocity of 60 m/s. Finally, the wear-mechanism was discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2605.pdf
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