Julong HE
,
Dongli YU
,
Ming ZHANG
,
Yongiun TIAN
,
Shizhen CHEN and Dongchun LI (Yanshan University
,
Qinhuangdao
,
066004
,
China)
材料科学技术（英）
The liquid sintering characteristics have been studied in the sintered compacts of short cast iron fibers added with Ni-Cr based alloy powder at the sintering temperature of 1100℃. With the increase of Ni-Cr based alloy content, the microstructure of sintered compact of short cast iron fibers transformed from pearlite+ferrite to martensite+austenite, meanwhile volume expansion appeared in the sintered compact, leading to more pores. The proper addition of P-Fe powder could restrain the expansion of the sintered compact and increase the strength and hardness of the sintered compact.
关键词:
Dongli YU
,
Julong HE
,
Yongiun TIAN
,
Shizhen CHEN and Dongchun LI(Yanshan University
,
Qinhuangdao
,
066004
,
China)
材料科学技术（英）
The effects of alloying elements P and Cu on the sintering process and mechanical properties of short cast iron fiber compact have been studied. The experimental results show that the sintering can be enhanced obviously by addition of phosphorus. The radial crush strength of sintered compacts increases with P content up to 0.15%, but when P content is over 0.15%,eutectics formed at the interfaces of fibers cause the decrease in strength and quasi-cleavage fracture of the sintered compact. Addition of Cu could not only reduce the volume shrinkage effectively, but also increase the strength and hardness of the sintered compact.
关键词:
