Effect of carbusintering on densification behavior and mechanical properties of Fe-2%Ni-x%Cu alloys

被引：6
|
作者：
Liu, Shuangyu [1 ]
Zhang, Hong [1 ]
Hu, Jiandong [2 ]
机构：
[1] Changchun Univ Sci & Technol, Coll Mech & Elect Engn, Changchun 130022, Peoples R China
[2] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Coll Mat Sci & Engn, Changchun 130025, Peoples R China
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 07期
关键词：
Surface hardening treatment; Mechanical; Microstructure; POWDER-METALLURGY STEELS; SINTERED STEELS; WEAR BEHAVIOR; PM STEELS; IRON; COPPER; MICROSTRUCTURE; CARBON; PARTS;
D O I：
10.1016/j.matdes.2011.03.070
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Densification behavior and mechanical properties of Fe-Ni-Cu alloys prepared by carbusintering (CBS) and conventional sintering (CS) were studied. Carbusintering process showed the improved properties and high density compared with conventional sintering process. These differences can be explained by the microstructure and the diffusion of copper in iron powder. Microstructure observations indicated that the carbusintering process favored to refine grain size. Diffusion model analysis indicated that the diffusion coefficient of copper in iron was up to 0.63 x 10(-14) m(2)/s during carbusintering process. After heat treatment, the hardness, impact energy and ultimate fracture strength of carbusintered compact are increased to 48HRC (484 HV), 13 J and 531 MPa, respectively. The use of CBS process was able to make process simple by taking sintering and carburizing as one step. The higher carbon content of the surface in P/M parts can be easily achieved compared to conventional carburizing. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3686 / 3691
页数：6
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