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Zirconium-containing electrothermal alloy and preparation method of zirconium-containing alloy

An electrothermal alloy and zirconium alloy technology, which is applied in the direction of improving process efficiency and energy efficiency, can solve the problems of large fluctuation of zirconium element composition and reducing the yield of electroslag ingots.

Active Publication Date: 2019-08-27
SUZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the initial heating stage of electroslag remelting, due to the continuous rise of the slag temperature, the equilibrium state of the aluminum-zirconium reaction is constantly changing, and the contents of aluminum and zirconium also change accordingly, which eventually leads to fluctuations in the composition of the zirconium element at the bottom of the electroslag ingot Large, reducing the yield of electroslag ingots
[0007] At present, there are few reports on the uniformity control of zirconium elements in electroslag remelting, and the uniformity control of zirconium elements in zirconium-containing alloys along the axial direction of the electroslag ingot has become a key issue in the production of high-quality zirconium-containing alloys by electroslag remelting. Bottleneck problem

Method used

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Embodiment 1

[0056] This embodiment provides a zirconium-containing electrothermal alloy, which includes: carbon: ≤0.03%, chromium: 19%-22%, aluminum: 3.3%-3.6%, zirconium: 0.35%-0.43%, silicon: ≤0.5%, titanium: 0.2% to 0.6%, manganese: ≤0.5%, magnesium ≥0.004%, sulfur: ≤0.01%, phosphorus: ≤0.03%, and the balance is Fe. The preparation method of this alloy is as follows:

[0057] (1) Vacuum induction smelting: According to the element ratio principle of zirconium-containing alloys, the smelting raw materials that can obtain carbon, chromium, aluminum, zirconium, silicon, titanium, manganese, magnesium and iron elements are weighed, and the raw materials include industrial pure iron and metal chromium , graphite, aluminum ingots, iron zirconium, titanium sponge, nickel-magnesium alloy; put industrial pure iron and metal chromium in the crucible of the induction furnace; put graphite, aluminum ingots, iron zirconium, and titanium sponge in the feeding bin, and finally add Nickel-magnesium a...

Embodiment 2

[0073] This embodiment provides a zirconium-containing electrothermal alloy, which includes: carbon: ≤0.03%, chromium: 19%-22%, aluminum: 3.3%-3.6%, zirconium: 0.35%-0.43%, silicon: ≤0.5%, titanium: 0.2% to 0.6%, manganese: ≤0.5%, magnesium ≥0.004%, sulfur: ≤0.01%, phosphorus: ≤0.03%, and the balance is Fe. The preparation method of this alloy is as follows:

[0074] (1) Vacuum induction smelting: According to the element ratio principle of zirconium-containing alloys, the smelting raw materials that can obtain carbon, chromium, aluminum, zirconium, silicon, titanium, manganese, magnesium and iron elements are weighed, and the raw materials include industrial pure iron and metal chromium , graphite, aluminum ingots, iron zirconium, titanium sponge, nickel-magnesium alloy; put industrial pure iron and metal chromium in the crucible of the induction furnace; put graphite, aluminum ingots, iron zirconium, and titanium sponge in the feeding bin, and finally add Nickel-magnesium a...

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Abstract

The invention discloses zirconium-containing electrothermal alloy. The zirconium-containing electrothermal alloy comprises, by mass, 0-0.03% of carbon, 19-22% of chrome, 3.3-3.6% of aluminium, 0.35-0.43% of zirconium, 0-0.5% of silicon, 0.2-0.6% of titanium, 0-0.5% of manganese, 0-0.004% of magnesium, 0-0.01% of sulphur, 0-0.03% of phosphorus and the balance Fe. The invention further provides a method for preparing the zirconium-containing electrothermal alloy through vacuum induction melting and electroslag remelting. The initial slag system CaF2-CaO-MgO-Al2O3-ZrO2 is extracted during electroslag remelting, in the temperature rise period of the initial stage of remelting, Al2O3 powder is additionally added into the slag, therefore the content of zirconium in ingots is controlled precisely, and the zirconium is distributed evenly. According to the alloy and the preparation method, a right amount of zirconium is added into the electrothermal alloy, so that the high-temperature oxidationresistance of the electrothermal alloy is improved, and the high-quality effect is achieved through process control.

Description

technical field [0001] The invention relates to the field of metal material preparation, in particular to a zirconium-containing electrothermal alloy and a preparation method of the zirconium-containing alloy. Background technique [0002] Electric heating alloys are widely used in electric heating elements, metallurgical machinery, precision instruments and other industries because of their high resistivity, good heat resistance and high temperature oxidation resistance. With the development of science and technology and the increase of high-temperature working equipment, the requirements for the service temperature and high-temperature oxidation resistance of electrothermal alloys are getting higher and higher. It is very important to improve the high-temperature oxidation resistance of electrothermal alloys. In addition, compared with common alloys, electrothermal alloys contain higher aluminum elements. Aluminum easily forms clusters of large particles of alumina inclusi...

Claims

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Application Information

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IPC IPC(8): C22C38/28C22C38/06C22C38/04C22C38/02C22C33/06C22B9/18C21D8/06
CPCC21D8/065C22B9/18C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/28Y02P10/25
Inventor 侯栋王德永胡显军范金席屈天鹏王慧华田俊
Owner SUZHOU UNIV
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