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Metal powder atomization device and method for the device to prepare FeCoTaZr alloy powder

An atomization device and metal powder technology, applied in the field of alloy powder preparation, can solve the problems of large target grain size, difficult alloying, and poor composition uniformity, and achieve low impurity content, good alloying, and low oxygen content Effect

Active Publication Date: 2014-07-02
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is simple and the purity of the target is guaranteed, but because it is a quaternary alloy target, alloying is difficult, so the target has a large grain size and poor composition uniformity

Method used

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  • Metal powder atomization device and method for the device to prepare FeCoTaZr alloy powder
  • Metal powder atomization device and method for the device to prepare FeCoTaZr alloy powder
  • Metal powder atomization device and method for the device to prepare FeCoTaZr alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the alloy powder in this example, the contents (percentage by weight) of the four elements Fe, Co, Ta and Zr are 35%, 32%, 24% and 9%, respectively. The ingredients are prepared according to the designed alloy composition, and the purity of the four elements is ≥99.95%. Under the protection of high-purity nitrogen, put the prepared raw materials into the yttrium oxide crucible of the melting furnace, raise the temperature to 1550°C to completely melt the raw materials, and cast them into prefabricated ingots. Put the prefabricated ingot into the intermediate frequency induction melting furnace of the atomization device, under the protection of high-purity nitrogen, raise the temperature to 1650 ° C, keep it for 12 minutes, and then pour the melt into the zirconia tundish, the temperature of the tundish is 1000 ° C, After the melt flows out through a zirconia guide tube with an inner diameter of 4.5 mm, it is atomized with high-purity argon in the atomization chamber,...

Embodiment 2

[0027] In the alloy powder in this example, the contents (percentage by weight) of the four elements Fe, Co, Ta and Zr are 50%, 25%, 22% and 8%, respectively. The ingredients are prepared according to the designed alloy composition, and the purity of the four elements is ≥99.95%. The protective atmosphere in the smelting furnace is high-purity argon, and the prepared raw materials are put into a calcium oxide crucible, and cast into prefabricated ingots at 1500°C. Put the prefabricated ingot into the calcium oxide intermediate frequency induction melting furnace of the atomization device, raise the temperature to 1600°C under the protection of high-purity argon, keep it for 10 minutes, and then pour the melt into the calcium oxide tundish. The temperature of the tundish is At 950°C, after the melt flows out of the calcium oxide and zirconia composite guide tube with an inner diameter of 3.5 mm, it is atomized with high-purity argon in the atomization chamber, and the atomizati...

Embodiment 3

[0029] In the alloy powder in this example, the contents (percentage by weight) of the four elements Fe, Co, Ta and Zr are 31%, 34%, 25% and 10%, respectively. The ingredients are prepared according to the designed alloy composition, and the purity of the four elements is ≥99.95%. A zirconia crucible is used in the melting furnace, the protective atmosphere is high-purity helium, and the melt temperature is 1600°C to cast into prefabricated ingots. Put the prefabricated ingot into the zirconia medium-frequency induction melting furnace of the atomization device. The protective atmosphere in the melting room is high-purity helium. The temperature is raised to 1700°C and kept for 14 minutes. Then, the melt is poured into the zirconia tundish. The tundish temperature The temperature is 1200°C. After the melt flows out of the yttrium oxide guide tube with an inner diameter of 3.0mm, it is atomized with high-purity argon in the atomization chamber, and the atomization pressure is 5...

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Abstract

The invention discloses a metal powder atomization device and a method for the device to prepare FeCoTaZr alloy powder. The FeCoTaZr alloy powder prepared by the device comprises the components of, by weight, the balance of Fe, 20%-35% of Co, 5%-25% of Ta and 5%-15% of Zr. Materials are distributed according to the designed alloy components. Protected by insert atmosphere, raw materials are melted and are casted into prefabricated ingots. Protected by the insert atmosphere, the prefabricated ingots are melted. After heat preservation is conducted for a while, inert gas is used as atomization media, and the metal powder atomization device is used for atomization. The atomization pressure is 1.0-5.0MPa. The FeCoTaZr powder prepared by the metal powder atomization device is high in spherical degree, small in grain size, low in impurity content, low in oxygen content, small in crystal particle, even in component, and good in alloying.

Description

technical field [0001] The invention belongs to the technical field of alloy powder preparation, and in particular relates to a metal powder atomization device and a method for preparing FeCoTaZr alloy powder. The alloy powder is used for the preparation of a soft magnetic bottom layer of a perpendicular magnetic recording medium. Background technique [0002] In information storage methods, magnetic information storage technology represented by hard disk technology has always occupied an important position due to its advantages of high storage density, large capacity, fast speed and low price. As the magnetic recording density of hard disks continues to increase exponentially, the traditional horizontal (that is, longitudinal) magnetic recording method is changed to a vertical magnetic recording method. The soft magnetic underlayer material in the perpendicular magnetic recording media has been explored by hard disk manufacturers and academia for many years, and it is basic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 赵新明徐骏张永忠盛艳伟张少明袁国良
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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