Properties of R6M5 steel powders of various particle sizes and the structure of the steel in the sintered condition

Kiparisov, S. S.; Tretyakov, V. I.; Панов, В. С.; Smirnova, M. M.; Kots, Yu. F.

doi:10.1007/bf00801749

Cited by 2 publications

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“…Kiparosov [16] investigated the effect of particle size of steel powders on the sintered properties. He stated that with decreasing particle size sinterability improved.…”

Section: Literature Reviewmentioning

confidence: 99%

Are Large Particles of Iron Detrimental to Properties of Powder Metallurgy Steels?

Abdallah

Habibnejad-korayem²,

Malakhov

2020

Metals

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It is experimentally shown that a removal of particles exceeding 100 microns in size from iron powders typically used in the fabrication of medium density powder metallurgy steels has a weak effect on apparent density, flowability and compressibility of blends as well as on density and strength of green bodies. An elimination of such particles, i.e., cutting off a heavy tail of a size distribution histogram at the 100 μm threshold, improves a compositional uniformity of sintered materials, but has no noticeable beneficial effect upon the strength of a final product, which is likely be determined by a fraction of pores and their shapes. A presence of soft pearlitic inclusions hardly matters unless their number density becomes so large that a 3D continuity (integrity) of a hard martensitic matrix is lost. This finding suggests that such an expensive preparatory step as sieving away large particles from as-received mixtures would bear no technological advantages. It was experimentally found that an attempt to lower the threshold below 100 μm noticeably worsened apparent density, flowability and compressibility.

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“…Kiparosov [16] investigated the effect of particle size of steel powders on the sintered properties. He stated that with decreasing particle size sinterability improved.…”

Section: Literature Reviewmentioning

confidence: 99%