1991
DOI: 10.1016/0026-0657(91)91760-4
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Niobium in PM high speed steels

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Cited by 9 publications
(5 citation statements)
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“…[23] The concentration of niobium in tool steels is limited to 2 wt.%. [24,25] EXPERIMENTAL Nitrogen atomized powder (pressure of the atomizing medium 400-600 kPa) of chemical composition given in Table 1 was hot isostatically pressed (HIP) at temperature of 11208C for 4 hr under maximum argon pressure of 147 MPa. The coarse and hard particles reduce the toughness of the material.…”
Section: Reprintsmentioning
confidence: 99%
“…[23] The concentration of niobium in tool steels is limited to 2 wt.%. [24,25] EXPERIMENTAL Nitrogen atomized powder (pressure of the atomizing medium 400-600 kPa) of chemical composition given in Table 1 was hot isostatically pressed (HIP) at temperature of 11208C for 4 hr under maximum argon pressure of 147 MPa. The coarse and hard particles reduce the toughness of the material.…”
Section: Reprintsmentioning
confidence: 99%
“…O processo Osprey [30][31][32] ou processo de conformação por "spray" envolve a atomização contínua de uma liga metálica e a deposição das gotículas em um substrato antes que todas se encontrem no estado sólido. O processo apresenta as vantagens proporcionadas pelo processamento via metalurgia do pó, sem as desvantagens associadas com a consolidação [33] ( figura 2.15).…”
Section: A4) Métodos De Obtençãounclassified
“…As condições de profundidade de corte e avanço constantes fazem com que em cada passe não só o comprimento de cavaco seja constante, mas também o volume de material removido. Além do material da ferramenta, a velocidade de corte também foi um parâmetro variável, tendo sido aplicadas conforme mencionado anteriormente, quatro velocidades de corte (30,32, 34 e 36 m/min) na usinagem com cada uma das 4 variações de material de ferramenta.…”
Section: Figura 319 -Detalhe Do Esquema Utilizado Para Determinação D...unclassified
“…Niobium additions are limited to about 2 mass%. in conventional casting metallurgy, owing to the tendency of the MC particles to grow to very large sizes,4 but processing via powder metallurgy allows the use of higher Nb levels 7. The many essential alloy additions to iron (C, W, Mo, V, Cr, and Nb) make the HSS a complex multi‐component system.…”
Section: Introductionmentioning
confidence: 99%