Fe-Cr-Mo-C 系粉末压坯烧结致密化机理

MECHANISM OF SINTERING DENSIFICATION OF FeCrMoC POWDER COMPACT

研究了烧结温度对Ｆｅ－Ｃｒ－Ｍｏ－Ｃ系试样密度及性能的影响，探讨了实现烧结致密化的机理．结果表明，采用真空烧结工艺，在１１６０～１２６０℃范围内，Ｆｅ－（１３～２０）Ｃｒ－１．５Ｍｏ－（１．８～３．６）Ｃ粉末压块可实现液相烧结致密化，制得密度大于７．３ｇ／ｃｍ３，硬度ＨＲＡ７０以上的高Ｃｒ烧结铁基材料．适宜的液相烧结温度随Ｃ含量增加而降低．

おhe influence of sintering temperatures on the density and other properties of FeCrMoC system was studied,and the mechanism of sintering densification was also investigated.The results showed that the densification of Fe(13～20)Cr15Mo(18～36)C powder compact can be abtained by liquidus sintering at 1160～1260 ℃ and in the condition of vacuum sintering.The high chromium sintered ironbase materials with density of above 73 g/cm3 and hardness of above HRA70 were obtained.It was found that liquidus sintering temperature decreases with the increase of carbon contents.