System and method for forming disk part by performing two-stage atomizing and spraying
A spray forming and atomizing nozzle technology, which is applied in the field of atomization of molten metal and deposition of metal droplets, can solve the problems of large-diameter axisymmetric central hole parts with large difficulty, low gas density, and low momentum, etc., to achieve Reduce the densification process, reduce the average particle size, and improve the effect of microstructure
Inactive Publication Date: 2012-07-04
NORTHWESTERN POLYTECHNICAL UNIV
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The invention provides a system and method for forming a disk part by performing two-stage atomizing and spraying. The method comprises the following steps of: performing first-stage atomizing: spraying high-speed inert gas out of an atomizing nozzle for atomizing molten metal to form an atomizing cone; performing second-stage atomizing: colliding metal molten drops in the atomizing cone with a throw-away disk in a flying process, and further refining the molten drops at a high relative speed under the colliding and centrifuging actions of the throw-away disk which rotates at a high speed and the molten drops; and after two-stage atomizing is completed, making the metal molten drops fly towards a receiving mold at a very high speed, performing quick condensation in the process, and depositing and forming on the receiving mold finally, wherein the annular mold rotates at a high speed, and the received semi-solid liquid drops occupy pores generated by depositing under the action of centrifugal force, so that the porosity of a depositing blank is lowered. The annular mold can move up and down along an axial direction during high-speed rotation, and the wall thickness and axial length of a formed piece can be controlled by adjusting axial feeding speed and total feeding amount.
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