合金元素Cu对铸铁短纤维烧结特性的影响

Effect of Element Cu on Sintering Characterics of Short Cast Iron Fibre

采用在铸铁短纤维中加入铜元素的方法．研究了合金元素Ｃｕ对铸铁短纤维烧结体致密度、显微组织、相组成和性能的影响．铜元素的加入，在一定的铜含量区间内可引起铸铁短纤维烧结体发生膨胀．但与Ｆｅ—Ｃｕ粉末压坯相比．其膨胀量和产生最大膨胀的Ｃｕ含量均减小．铸铁短纤维发生异常膨胀的机制是富铜液相向γ中的体扩散．

he effect of alloying element Cu on densification. microstructure,phases and properties of sintered short cast iron fibre compact has been studiedby doping with Cu to the compact. Doping Cu to the short cast iron fibre causesthe sintered compact swelling and enhanses its dentification. By comparing withthe Fe-Cu compact the volume groWth and copper content resulting in themaxium volume groWth decrease.The volume swelling of sintered short cast ironfibre compact containing element Cu results from the diffusion of rich-copperliquid phase into iron lattice