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Method for preparing Inconel 625 alloy spherical powder

A spherical powder and alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of production difficulty and procurement cost increase, and achieve the effect of improving powder yield, easy large-scale repetitive production, and low impurity content

Inactive Publication Date: 2016-06-22
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process uses Inconel625 metal wire with a diameter of less than 5mm as the raw material, which leads to a significant increase in the production difficulty and procurement cost of the raw material

Method used

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  • Method for preparing Inconel 625 alloy spherical powder
  • Method for preparing Inconel 625 alloy spherical powder

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: the preparation of Inconel625 alloy spherical powder

[0030] The mass ratio of the main elements is Ni-21Cr-8.5Mo-3.5Nb-4Fe, and the mass percentage of trace elements does not exceed the standard value, that is, C is not more than 0.1%, Al is not more than 0.4%, Ti is not more than 0.04%, Co Not more than 1%, Mn not more than 0.5%, S not more than 0.015%, P not more than 0.015%, Si not more than 0.5%, Ta not more than 0.05%, wherein the Nb element comes from the NbFe alloy containing Nb70%. Carry out a smelting in a vacuum induction furnace with a vacuum degree of 0.1Pa; remove the surface scale of the first smelting, and perform a second vacuum self-consumption remelting with a vacuum degree of 0.05Pa to obtain a second smelting of Inconel625 master alloy with a relative density of 87%. Ingot-shaped billet; master alloy rods with a density of 99.6% are obtained by isothermal free forging, and are machined into Inconel625 alloy electrode rods with a diame...

Embodiment 2

[0032] Embodiment 2: the preparation of Inconel625 alloy spherical powder

[0033] The mass ratio of the main elements is Ni-22.5Cr-9.5Mo-4Nb-2Fe, and the mass percentage of trace elements does not exceed the standard value, that is, C is not more than 0.1%, Al is not more than 0.4%, Ti is not more than 0.04%, Co Not more than 1%, Mn not more than 0.5%, S not more than 0.015%, P not more than 0.015%, Si not more than 0.5%, Ta not more than 0.05%, wherein the Nb element comes from the NbFe alloy containing Nb70%. Carry out a smelting in a vacuum induction furnace with a vacuum degree of 0.05Pa; remove the surface oxide skin of the first smelting, and perform a second vacuum self-consumption remelting with a vacuum degree of 0.01Pa to obtain a second smelting of Inconel625 master alloy with a relative density of 88%. Ingot billet. A master alloy rod with a density of 99.5% was obtained by isothermal free forging, and processed into an Inconel625 alloy electrode rod with a diame...

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Abstract

A method for preparing Inconel 625 alloy spherical powder comprises following steps: according to the AMS 5666G standard, two-time vacuum smelting of alloy ingredient compositions and a master ingot is carried out; through forging and mechanical machining, the master ingot is made into an alloy electrode bar; atomizing equipment is subject to pre-vacuum-pumping treatment, mixed inert shielding gas is led into the atomizing equipment, and the pressure ranges from 0.1*105 Pa to 3*105 Pa; the electrode bar is fed into an atomizing chamber through a feeding system, a plasma torch is used for heating the end face of the electrode bar, metal liquid drops are prepared through the centrifugal effect of a rotating electrode, and the metal liquid drops are instantly solidified into the spherical metal powder; and a powder collecting device containing an electrostatic separation component carries out inclusion removing treatment and pure powder collection on the metal spherical powder. The method has the beneficial effects of being high in production efficiency, high in batch stability, high in fine powder yield and the like and can easily prepare the Inconel 625 alloy spherical powder with the high purification, the good sphericility degree and the high liquidity.

Description

technical field [0001] The invention belongs to the technical field of metal and alloy powder preparation, in particular to a method for preparing Inconel625 alloy spherical powder. Background technique [0002] Inconel 625 alloy is a solid-solution strengthened nickel-based deformed superalloy with Mo and Nb as the main strengthening elements. It was first developed by the International Nickel Company in the 1950s to meet the needs of high-strength main steam pipeline materials. At present, below 650 °C, Inconel625 alloy has properties such as durability, fatigue resistance, oxidation resistance and chloride ion stress corrosion crack resistance. This alloy is mainly used in structural components such as gas turbine engines, nuclear power equipment, aerospace engines and nuclear reactors. [0003] In recent years, with the continuous development of metal near-net forming technologies such as hot isostatic pressing technology, metal additive manufacturing technology, and met...

Claims

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Application Information

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IPC IPC(8): B22F9/14
CPCB22F9/14B22F2999/00B22F1/065B22F2202/17B22F2201/11B22F2201/12
Inventor 赵霄昊陈小林王庆相韩志宇徐伟梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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