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《JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING》 1999-01
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Copper-infiltrated/Sintered Iron-based Alloy with High Content of Carbonand Alloying Elements Used for Valve-Seats

Cheng Lili; Dong Yi(Material Science and Engineering School, UST Beijing,Beijing 100083,China)  
The influence of different alloying elements and heat-treatment on the density andmechanical properties of the copper-infiltrated/sintered iron-based alloy was investigated. Theiron-based alloy blank with high content of carbon and alloying elements was developed by mechanical mixing. After copper-infiltration/sintering, the material has the density of 7. 88 g/cm3 (the relativedensity of 98.2%), hardness of HRc 45.2 and TRS of 1 124 MPa. After quenching at 900℃ andhigh-temperature at 580℃, with large amount of martensite in the microstructure the material possesses the hardness of over HRc 40.
【CateGory Index】: TG143
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