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Iron-chromium-aluminum alloy bar and preparation method thereof

A technology of iron-chromium-aluminum alloys and rods, which is applied in the direction of metal material coating process, coating, and energy efficiency improvement. It can solve the problems of easy peeling off of the oxide layer, poor insulation, and non-wear resistance, and achieve less segregation and better thickness. Moderate, solve the effect of easy falling off

Active Publication Date: 2020-07-24
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the foregoing, the present invention provides an iron-chromium-aluminum alloy rod and a preparation method thereof. The prepared iron-chromium-aluminum alloy rod will form a dense, rough high-temperature-resistant and wear-resistant oxide layer on the surface, solving the problem of iron-chromium-aluminum alloy rods. The oxide layer of chrome-aluminum alloy bar is easy to fall off, not wear-resistant, and has poor insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The iron-chromium-aluminum alloy rod material provided in this embodiment has a dense, rough high-temperature-resistant and wear-resistant oxide layer formed on its surface; in terms of mass percentage, the alloy composition of the iron-chromium-aluminum alloy rod material is carbon ( C) ≤ 0.03%, chromium (Cr): 19.5-22%, aluminum (Al): 3-5%, titanium (Ti) ≤ 0.70%, zirconium (Zr) ≤ 0.60%, tungsten (W) ≤ 0.25%, Molybdenum (Mo)≤0.30%, vanadium (V)≤0.25%, niobium (Nb)≤0.30%, and the balance is iron (Fe).

[0038] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0039] Step 1: Smelting in a 200kg vacuum induction melting furnace, the above alloy components are prepared according to the proportion of ingredients such as iron, chromium, carbon, tungsten, molybdenum, vanadium, niobium, aluminum, titanium, zirconium raw materials, according to the smelting sequence, iron, chromium , carbon, tungsten, molybdenum, vanadi...

Embodiment 2

[0058] The iron-chromium-aluminum alloy rod material provided in this embodiment has a dense, rough high-temperature-resistant and wear-resistant oxide layer formed on its surface; in terms of mass percentage, the alloy composition of the iron-chromium-aluminum alloy rod material is carbon ( C) ≤ 0.03%, chromium (Cr): 19.5-22%, aluminum (Al): 3-5%, titanium (Ti) ≤ 0.70%, zirconium (Zr) ≤ 0.60%, tungsten (W) ≤ 0.25%, Molybdenum (Mo)≤0.30%, vanadium (V)≤0.25%, niobium (Nb)≤0.30%, and the balance is iron (Fe).

[0059] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0060] Step 1: Smelting in a 200kg vacuum induction melting furnace, the above alloy components are prepared according to the proportion of ingredients such as iron, chromium, carbon, tungsten, molybdenum, vanadium, niobium, aluminum, titanium, zirconium raw materials, according to the smelting sequence, iron, chromium , carbon, tungsten, molybdenum, vana...

Embodiment 3

[0079] The iron-chromium-aluminum alloy rod material provided in this embodiment has a dense, rough high-temperature-resistant and wear-resistant oxide layer formed on its surface; in terms of mass percentage, the alloy composition of the iron-chromium-aluminum alloy rod material is carbon ( C) ≤ 0.03%, chromium (Cr): 19.5-22%, aluminum (Al): 3-5%, titanium (Ti) ≤ 0.70%, zirconium (Zr) ≤ 0.60%, tungsten (W) ≤ 0.25%, Molybdenum (Mo)≤0.30%, vanadium (V)≤0.25%, niobium (Nb)≤0.30%, and the balance is iron (Fe).

[0080] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0081] Step 1: Smelting in a 200kg vacuum induction melting furnace, the above alloy components are prepared according to the proportion of ingredients such as iron, chromium, carbon, tungsten, molybdenum, vanadium, niobium, aluminum, titanium, zirconium raw materials, according to the smelting sequence, iron, chromium , carbon, tungsten, molybdenum, vana...

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Abstract

The invention provides an iron-chromium-aluminum alloy bar and a preparation method thereof. The preparation method of the iron-chromium-aluminum alloy bar adopts a vacuum induction smelting furnace for smelting, and after raw materials are melted, the temperature of an alloy melt is increased to 1550-1580 DEG C for refining; the temperature of the alloy melt is adjusted at the end of refining to1530-1550 DEG C, and an electrode rod for electroslag remelting is obtained by pouring; an aluminum powder mixed solution is coated on the surface of the electrode rod, baked, and subjected to electroslag remelting smelting, and the aluminum content of a molten alloy electroslag ingot is uniform; and the alloy electroslag ingot is subjected to surface finishing, heating forging and hot rolling toform a straight bar, the straight bar is peeled and polished to prepare a bright iron-chromium-aluminum alloy bar stock, and finally the bright iron-chromium-aluminum alloy bar stock is subjected to oxidation roasting treatment to prepare the iron-chromium-aluminum alloy bar with a compact, rough, high-temperature-resistant and wear-resistant oxidation layer formed on the surface, so that the problems that an oxidation layer of an iron-chromium-aluminum alloy bar is prone to falling off, not resistant to wear and poor in insulating property are solved.

Description

technical field [0001] The invention relates to the field of alloy preparation, in particular to an iron-chromium-aluminum alloy rod and a preparation method thereof. Background technique [0002] Technological advances in the automotive and ceramic industries require extensive use of high-temperature alloys. In addition to requiring alloy materials to be stable and consistent in quality at high temperatures, higher requirements are also placed on the surface quality of alloy materials. At present, the method of coating high temperature resistant layer on the surface of high temperature alloy or metal can meet the above requirements. However, superalloys have the disadvantages of high price, non-wearable surface at high temperature, and poor insulation. Due to the inherent brittleness of the coating material itself, the coating on the metal surface is prone to cracking and peeling at high temperatures, resulting in coating failure, and in severe cases, it will damage the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/06C22C38/28C22C38/22C22C38/24C22C38/26C22C33/04C22B9/18C23C8/14
CPCC22B9/18C22C33/04C22C38/06C22C38/18C22C38/22C22C38/24C22C38/26C22C38/28C23C8/14Y02P10/25
Inventor 刘志坚丘源陈远星何坤宏
Owner SOUTH CHINA AGRI UNIV