The effect of PSD on properties of unimodal and bimodal powders using 17-4 PH stainless steel powder

Muchavi, Noluntu S; Seerane, Mandy; Machaka, Ronald

doi:10.1007/s00170-019-04368-9

Cited by 1 publication

(1 citation statement)

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“…7,8,9 17-4PH is a martensitic precipitation hardening stainless steel with excellent physical and mechanical properties, good toughness, corrosion resistance, easy machining and welding, with excellent combination properties. 10 It is widely used in chemical, petrochemical, and aerospace industries. 11,12 Mukund et al 13 have studied the effect of powder particle size and shape difference in water-atomized 17-4PH powder on MIM parts' critical powder loading capacity.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface modification of metal powders (by aluminum stearate) on the properties of metal injection molding feedstock

Ma,

Fang,

Zhou

et al. 2024

Powder Metallurgy

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Metal injection molding (MIM) is a net-forming technology for manufacturing miniature metal parts, which can improve the manufacturing accuracy of complex-shaped parts. In this study, aluminum stearate was used to modify the 17-4PH stainless steel powder, the binder was composed of (PMMA) and (PEG) with the volume ratio of 7:3. The effects of aluminum stearate surfactant amount on the feedstock viscosity, water debinding rate and thermal debinding shape were studied. The results showed that the coating of aluminum stearate breaks the agglomeration between the powders and decreases the viscosity of the feedstock. When the addition of aluminum stearate was 0.6wt% of the powder mass, the melt index, density and flexural modulus of the feedstock were 81.5 g/10 min, 5.44 g/cm3, and 1643Mpa, respectively, and the thermal debinding shape retention was the best of all debinded parts. However, too much aluminum stearate makes the feedstocks thicker and the green part weaker.

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