Effect of atomization conditions on the quality of brass powder

Radomysel'skii, I. D.; Gaiduchenko, G. K.; Kalinyuk, N. N.; Medvedovskii, A. B.; Nichiporenko, O. S.; Chaikina, N. G.

doi:10.1007/bf00805642

Cited by 5 publications

(2 citation statements)

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“…El oxígeno, en forma de óxido de cinc, no se elimina durante la sinterización y afecta de forma negativa a las propiedades mecánicas de las piezas y disminuye la resistencia a la tracción y el grado de plasticidad (5). La práctica industrial de fabricación de piezas de latón demuestra que la estabilidad de las propiedades mecánicas de las piezas se alcanza con un polvo que contiene entre 0,08 -0,23 % O2 (6).…”

Section: Y (3 (3)unclassified

Optimización de los parámetros tecnológicos para la obtención de piezas de latón por pulvimetalurgia

Krivij¹,

Suwardjo²,

Cores³

1995

REVMETAL

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Resumen Se han producido polvos de latón 60 (40 % de Zn) y latón 80 (20 % de Zn) mediante la atomización del metal fundido con agua a alta presión, en la planta de pulvimetalurgia del Centro de Investigaciones Metalúrgicas (CIME) de La Habana. Se ha realizado la caracterización físico-química y tecnológica y se han determinado los parámetros óptimos para conformar y sinterizar piezas a partir de estos polvos. Las propiedades mecánicas de estas piezas pueden competir con las de bronce y hierro, en aplicaciones para equipos electrodomésticos y en construcción.Palabras clave: Piezas de latón. Pulvimetalurgia. Optimization of the technological parameters for obtaining brass details by powder metallurgy AbstractPowders of brass 60 (40 % Zn) and brass 80 (20 % Zn) have been produced by spraying molten metal with water at high pressure in the powder metallurgy plant belonging to the Metallurgical Research Centre (CIME) in Havana. A physical-chemical and technological characterization of the powders has been carried out and the optimum parameters have been determined for the formation and sintering of details from these powders. The mechanical properties of these details can rival bronze and iron in applications such as in household electrical goods and in construction.

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Section: Y (3 (3)unclassified

Optimización de los parámetros tecnológicos para la obtención de piezas de latón por pulvimetalurgia

Krivij¹,

Suwardjo²,

Cores³

1995

REVMETAL

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“…These oxidized compounds are CuO and ZnO which are difficult to reduce. Radomysel'skii et al [20] studied the effects of the atomization condition on the quality of brass powder and discovered that these oxides were difficult to remove during sintering and had negative effects on the mechanical properties of the finished parts. Apart from the oxide formation, the zinc component also begins to boil and vaporize at 907˚C [21].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Sintering Temperature on the Densification of Mechanically Alloyed W-Brass Composites

Gowon¹,

Mohammed²,

Jamaluddin³

et al. 2015

OJMetal

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Prealloyed (PA) and premixed (PM) W-brass with the composition of 60 wt% W, 1 wt% Ni and 39 wt% brass was sintered at the temperature of 800˚C, 920˚C and 1000˚C each. As a result of difficulties in the densification of W-Cu and W-Cu alloys, mechanical alloying (MA) and activated sintering were combined. The powders were mechanically alloyed for 13 hours to produce nanosized W grains embedded in brass. The microstructure and properties of these composites with increase in sintering temperature has been studied. Both prealloyed and premixed composites sintered at 800˚C (solid state sintering) and 920˚C (sub-solidus state sintering) have lower sintered densities and hardness. The densification rate in the premixed composites was observed to be higher than that of the prealloyed composites. Their densification and properties increased with the increase in the sintering temperature. Premixed composite sintered at 1000˚C had 91.0% sintered density, 180 Hv microhardness against 76.0% and 133 Hv respectively for prealloyed composite at the same temperature. The values of electrical conductivity in both prealloyed and premixed composites increased with increase in temperature.

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