The influence of particle size distribution on the properties of metal-injection-moulded 17-4 PH stainless steel

被引:22
|
作者
Seerane, M. [1 ]
Ndlangamandla, P. [2 ]
Machaka, R. [1 ]
机构
[1] CSIR, Light Met Mat Sci & Mfg, Pretoria, South Africa
[2] Univ Pretoria, Dept Mat Sci & Met Engn, ZA-0002 Pretoria, South Africa
关键词
metal injection moulding; MIM; particle size distribution; 17-4 PH stainless steel; densification; properties; MOLDING FEEDSTOCK; BEHAVIOR; HARDNESS; POWDERS;
D O I
10.17159/2411-9717/2016/v116n10a7
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Metal injection moulding (MIM) is a near-net-shaping powder metallurgy technique suitable for the cost-effective mass production of small and complex components. In this paper, the effects of the metal powder particle size on the final properties of 17-4 PH stainless steel are reported. Three different particle sizes (d(50) 33.0, 7.91 and 4.04 mu m) were used to prepare the injectable MIM feedstocks using a CSIR-developed wax-based binder system at a fixed solids loading of 60 vol.%. The distribution slope parameter and the rheological flow index behaviour were used to predict the flowability of the feedstocks. The effects of the particle size on MIM products were established. The results are discussed in terms of the subsequent microstructural and mechanical properties of MIM 17-4 PH stainless steel against the established MPIF Standard 35.
引用
收藏
页码:935 / 940
页数:6
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