Preparation method of IN718 alloy spherical powder

A technology of IN718, spherical powder, applied in the field of preparation of INCONEL718 alloy spherical powder, can solve the problem that the demand of IN718 alloy powder cannot be met.

Inactive Publication Date: 2015-01-28
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of gas impurity content and inclusion content, the traditional gas atomization method cannot meet the needs of IN718 alloy powder preparation

Method used

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  • Preparation method of IN718 alloy spherical powder
  • Preparation method of IN718 alloy spherical powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of IN718 alloy spherical powder, comprising the following steps:

[0028] Step 1, smelting of IN718 master alloy ingot;

[0029] 1) According to the main elements: 50wt% Ni, 17wt% Cr, 2.8wt% Mo, 4.75wt% Nb, 0.65wt% Ti, 0.20wt% Al, the balance is Fe; minor elements: 0.07 wt % C, 0.33 wt % Mn, 0.4 wt % Si, 0.014 wt % P, 0.014 wt % S, 0.9 wt % Co, 0.04 wt % Ta, 0.006 wt % B, 0.25 wt % Cu is used for alloy batching, and the raw material of Nb is NbFe with 70% Nb content; it is smelted in a vacuum induction melting furnace, and the vacuum degree is 5×10 -3 Fill the crucible of Pa vacuum induction melting furnace with half of Ni, Co, Mo, NbFe, Cr, Ti, Al, and the other half of Ni from bottom to top; Afterwards, In718 alloy primary smelting ingot was obtained;

[0030] 2) Remove the oxide skin on the surface of the primary smelting ingot, cut off the shrinkage cavity and process it into a consumable electrode, and carry out vacuum consumable remelting, ...

Embodiment 2

[0038] A preparation method of IN718 alloy spherical powder, comprising the following steps:

[0039] Step 1, smelting of IN718 master alloy ingot;

[0040] 1) According to the main elements: 53wt% Ni, 19wt% Cr, 3.0wt% Mo, 5.15wt% Nb, 0.9wt% Ti, 0.60wt% Al, the balance is Fe; minor elements: 0.05 wt% C, 0.25 wt% Mn, 0.3 wt% Si, 0.01 wt% P, 0.01 wt% S, 0.8 wt% Co, 0.03 wt% Ta, 0.005 wt% B, 0.2 wt% Cu is used for alloy batching, and the raw material of Nb is NbFe with 70% Nb content; it is smelted in a vacuum induction melting furnace at a vacuum degree of 2.5×10 -3 In the crucible of Pa vacuum induction melting furnace, fill half of Ni, Co, Mo, NbFe, Cr, Ti, Al, and the other half of Ni from bottom to top; Afterwards, In718 alloy primary smelting ingot was obtained;

[0041]2) Remove the oxide skin on the surface of the primary smelting ingot, cut off the shrinkage cavity and process it into a consumable electrode, and carry out vacuum consumable remelting, the vacuum degree...

Embodiment 3

[0049] A preparation method of IN718 alloy spherical powder, comprising the following steps:

[0050] Step 1, smelting of IN718 master alloy ingot;

[0051] 1) According to the main elements: 55wt% Ni, 21wt% Cr, 3.3wt% Mo, 5.50wt% Nb, 1.15wt% Ti, 0.8wt% Al, the balance is Fe; minor elements: 0.03 wt % C, 0.15 wt % Mn, 0.2 wt % Si, 0.008 wt % P, 0.008 wt % S, 0.06 wt % Co, 0.02 wt % Ta, 0.004 wt % B, 0.15 wt % Cu is used for alloy batching, and the raw material of Nb is NbFe with 70% Nb content; it is smelted in a vacuum induction melting furnace at a vacuum degree of 1.5×10 -3 Fill the crucible of Pa vacuum induction melting furnace with half of Ni, Co, Mo, NbFe, Cr, Ti, Al, and the other half of Ni from bottom to top; Afterwards, In718 alloy primary smelting ingot was obtained;

[0052] 2) Remove the oxide skin on the surface of the primary smelting ingot, cut off the shrinkage cavity and process it into a consumable electrode, and carry out vacuum consumable remelting, th...

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Abstract

The invention discloses a preparation method of IN718 alloy spherical powder. The method comprises the following steps of step 1, smelting an IN718 alloy master ingot; step 2, processing the IN718 alloy master ingot into an IN718 alloy electrode bar with the diameter of 50 to 90mm and the length of 600 to 800mm, wherein the straightness of the electrode bar is controlled to be smaller than or equal to 0.1mm / m; step 3, placing the IN718 alloy electrode bar in a sealed furnace chamber protected by inert gas, rotating the IN718 alloy electrode bar at high speed, and heating the end part of the electrode bar by using a plasma gun to melt the electrode bar; step 4, atomizing the melted metal under the action of centrifugal force to enable melted metal to fly to form fine liquid droplets, wherein the liquid droplets are quickly cooled in inert gas to form spherical particles, and the spherical particles fall into a collector at the bottom of the furnace chamber to form the IN718 alloy spherical powder; step 5, under the protection of the inert gas, performing electrostatic separation processing on the prepared IN718 alloy spherical powder to remove non-metal impurities from the powder to obtain the pure IN718 alloy spherical powder. The method has the characteristics of good sphericity degree, fine particle size, low oxygen content and few impurities.

Description

technical field [0001] The invention belongs to the technical field of alloy spherical powder preparation and relates to a preparation method of INCONEL718 alloy spherical powder. Background technique [0002] INCONEL718 alloy (referred to as IN718 alloy) is an austenite-based nickel-based superalloy strengthened by means of solid solution strengthening and grain boundary strengthening. corrosion performance. IN718 alloy occupies an absolute dominant position in the entire high-temperature alloy industry due to its excellent performance and wide range of uses, and is widely used in various fields such as aviation, aerospace, petroleum, chemical industry and energy. Due to the large content and types of strengthening elements in the IN718 alloy and the high degree of alloying, the traditional deformation and casting process has serious ingot segregation, poor hot workability and difficult forming. In order to solve this problem, researchers tried to prepare high-performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C22C19/05
Inventor 韩志宇张鹏陈小林曾光梁书锦周晓明张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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