Effect of oxygen and microporosity on some properties of a sintered high-speed steel

Parabina, G. I.; Kirillova, O. M.; Palamarchuk, A. F.; Zubkova, V. T.

doi:10.1007/bf00791559

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…5, the ion map of 12 Caccurately identifies the distribution of C in the orange MC, green M 6 C and blue Fe. By contrast, 11 B -, 16 O -and 32 S -show almost overlapped distributions as nano dots. 11 B 14 N -also exhibits fuzzy overlaps with boron, while 31 P -shows almost no segregation.…”

Section: The Role Of La and Bmentioning

confidence: 86%

“…Low density (85%-95%) [5] and high impurity content (O [16], S and P [17]) are the common shortages of sintered PM steel parts. Further, impurity contents directly determine the grade classification of PM HSSs.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…However, the existence of La, B and Fe in shell can't be denied. 11 B, 12 C, 11 B 14 N, 16 O, 32 S and 31 P in as-tempered DFT 10LB…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Direct fabrication of high-performance high speed steel products enhanced by LaB 6

et al. 2016

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A direct fabrication technology (DFT) without smelting has been developed for fabricating sophisticated high speed steel products with low pollution, near-net shaping and short process. The steel consisting of (wt. %): 6.4W, 5.0Mo, 4.2Cr, 3.1V, 8.5Co and 1.28C, was fabricated as exemplary material. The activated and reactive sintering of green compacts under vacuum with low activation energy, redox reaction enhanced diffusion and the construction of concentration gradient of alloying elements around pores, promotes the nearly full densification (>99.40%). Also, the DFT steels show high purity and superior mechanical properties. Minor strengthening agent LaB 6 (0.1 wt. %), which is easily to be accurately introduced in DFT, obviously increases the hot hardness, temper resistance, bend strength and toughness of DFT M3:2. The strengthening effect of boron atoms and La-rich complexes are proposed to directly result in the high hot hardness and temper resistance of LaB 6 containing steel.

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Section: The Role Of La and Bmentioning

confidence: 86%

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Direct fabrication of high-performance high speed steel products enhanced by LaB 6

et al. 2016

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“…Therefore forming them requires use of special methods for metal forming within which hydrostatic stress and deformation predominates [1,2]. It is noted that the technology for preparing tool steel powders by spraying molten metal with high-pressure water [3] cannot compete with gas spraying due to the large amount of oxygen in the powder obtained [4].…”

Section: Introductionmentioning

confidence: 99%

Increase in the formability of powders that are difficult to deform

Gogaev

Radchenko

Gogaeva

2005

Powder Metall Met Ceram

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621.762The flowing capacity and relative poured density (RPD) of different fractions of original gas-sprayed high-speed steel powders and those treated in rolls as well as the strength of compacts prepared from them are studied. It is established that with this treatment powder particles are mainly broken down, and their flowability and RPD decrease. The ultimate RPD for treated powders with which quite strong compacts are obtained under normal cold pressing conditions is about 0.45.Compacts with satisfactory processing characteristics are obtained from powders with a RPD below 0.45. A relative poured density of 0.45 may serve as a production criterion of the suitability of powders that are difficult to deform for normal compaction.

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Special features of failure of R6M5 and 10R6M5-MP high-speed tool steels in superplastic deformation

Chernyshova

Гвоздев

Bazyk

1987

Powder Metall Met Ceram

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Effect of oxygen and microporosity on some properties of a sintered high-speed steel

Cited by 4 publications

References 2 publications

Direct fabrication of high-performance high speed steel products enhanced by LaB 6

Direct fabrication of high-performance high speed steel products enhanced by LaB 6

Increase in the formability of powders that are difficult to deform

Special features of failure of R6M5 and 10R6M5-MP high-speed tool steels in superplastic deformation

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