Alloy and manufacturing method thereof

A technology for alloys and alloy ingots, which is applied in the field of powder metallurgy and can solve the problems of reducing the density and closed pores of high-temperature alloy parts

Inactive Publication Date: 2018-08-21
西安赛隆增材技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides an alloy and a preparation method thereof, which are used to solve the existing powder metallurgy superalloys due to the existence of hollow powders, which are easy to form closed pores, resulting in the reduction of the density of superalloy parts, etc.

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  • Alloy and manufacturing method thereof
  • Alloy and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, the mass percent of each component of the superalloy is: 20% nickel, 15.5% iron, 16% chromium, 11.5% molybdenum, 5.0% niobium, 3.2% tungsten, 0.45% carbon, and the rest is cobalt.

[0029] Put the raw materials of the above components into a vacuum induction melting furnace, melt the alloy ingot of this component, and then cast it into the first bar with a specification of Φ80×600, cut off the shrinkage cavity of the first bar, and turn the first bar Processed into the second bar with a specification of Φ75×400.

[0030] Using the second bar as raw material, superalloy powder was prepared by plasma rotating electrode atomization method. Specifically, in the plasma rotating electrode atomization method, the rotational speed of the second rod is 14500 r / min, and the melting current is 1800A.

[0031] It should be noted that the alloy powder prepared by the plasma rotating electrode atomization method is as follows: figure 1 shown.

[0032] Further, the...

Embodiment 2

[0036] In this example, the mass percent of each component of the superalloy is: 21.5% nickel, 16.5% iron, 17% chromium, 12% molybdenum, 5.8% niobium, 4% tungsten, 0.50 carbon, and the rest is cobalt.

[0037] Put the raw materials of the above components into a vacuum induction melting furnace, melt the alloy ingot of this component, and then cast it into the first bar with a specification of Φ80×600, cut off the shrinkage cavity of the first bar, and turn it into a specification of Φ75× 400 for the second bar stock.

[0038] Using the second bar as raw material, superalloy powder was prepared by plasma rotating electrode atomization method. Specifically, in the plasma rotating electrode atomization method, the rotational speed of the second rod is 14500r / min, and the melting current is 1800A. The prepared alloy powder is sieved to obtain -150 mesh powder, the powder is loaded into a graphite mold, and vacuum hot-pressed sintering is carried out to obtain a high-density powd...

Embodiment 3

[0042] In this example, the mass percent of each component of the superalloy is: 22% nickel, 17.5% iron, 18.5% chromium, 13% molybdenum, 6.5% niobium, 4.5% tungsten, 0.60 carbon, and the rest is cobalt.

[0043] Put the raw materials of the above components into a vacuum induction melting furnace, melt the alloy ingot of this component, and then cast it into the first bar with a specification of Φ80×600, cut off the shrinkage cavity of the first bar, and turn the first bar Processed into the second bar with a specification of Φ75×400.

[0044] Using the second bar as raw material, superalloy powder was prepared by plasma rotating electrode atomization method. Specifically, in the plasma rotating electrode atomization method, the rotational speed of the electrode rod is 14500 r / min, and the melting current is 1800A. The prepared alloy powder is sieved to obtain -150 mesh powder, the powder is loaded into a graphite mold, and vacuum hot-pressed sintering is carried out to obtai...

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Abstract

The invention discloses an alloy and a manufacturing method thereof, and relates to the field of powder metallurgy. The method aims solving the problem that The method aims solving the problem that density of high-temperature alloy workpiece and the like caused by closed-hole pores which are easily formed due to the fact that hollow powder is existed in an existing power metallurge high-temperature alloy. The method comprises the following steps of an alloy ingot is smelted in a vacuum induction smelting furnace to form a first bar, wherein the alloy ingot comprises 20-22% of nickel, 15.5-17.5% of iron, 16-18.5% of chromium, 11.5-13% of molybdenum, 5.0-6.5% of niobium, 3.2-4.5% of tungsten, 0.45-0.60% of carbon, and the balance cobalt and impurities; shrinkage holes of the first bar are cut off to form a second bar, and the second bar is formed alloy powder by a plasma rotating electrode atomizing device; and the alloy powder is put into a graphite mould to carry out vacuum hot-pressing sintering to obtain the alloy.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to an alloy and a preparation method thereof. Background technique [0002] In order to improve the efficiency of aerospace engines and gas turbines, correspondingly, higher requirements are put forward for the heat resistance and strength of the hot end materials of aerospace engines and gas turbines. The high temperature and gold prepared by the traditional smelting and forging process, because of its higher alloying degree and more complex composition, can easily cause segregation of the alloy composition and uneven structure, and the subsequent processing of the alloy will bring greater difficulty. [0003] Due to the advantages of high alloying degree, small grain size, uniform structure, and no macro-segregation, powder metallurgy superalloys are widely used in high-temperature components in aerospace, industrial gas turbines, and ship gas turbines. At present, powder metall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C19/05C22C19/07C22C1/04
CPCC22C30/00B22F2998/10C22C1/04C22C1/0433C22C19/056C22C19/07B22F9/10B22F2003/145
Inventor 贺卫卫王新锋朱纪磊向长淑苏腾飞陈斌科邱沙张晗亮汤慧萍
Owner 西安赛隆增材技术股份有限公司
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