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A kind of iron-chromium-aluminum alloy rod and preparation method thereof

An iron-chromium-aluminum alloy, bar technology, applied in metal material coating process, solid-state diffusion coating, coating and other directions, can solve the problems of poor insulation, easy fall off of oxide layer, no wear resistance, etc., to reduce the tendency of brittleness , Enhanced toughness, strong effect of grain refinement

Active Publication Date: 2021-06-18
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A kind of iron-chromium-aluminum alloy rod and preparation method thereof
  • A kind of iron-chromium-aluminum alloy rod and preparation method thereof

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Effect test

Embodiment 1

[0034] 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).

[0035] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0036]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, vanad...

Embodiment 2

[0056] 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).

[0057] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0058] 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

[0077]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).

[0078] The method for preparing the above-mentioned iron-chromium-aluminum alloy bar comprises the following steps:

[0079] 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, vanad...

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Abstract

The invention provides an iron-chromium-aluminum alloy rod and its preparation method. The preparation method of the iron-chromium-aluminum alloy rod is smelted in a vacuum induction melting furnace. After the raw materials are melted, the temperature of the alloy melt is raised to 1550-1580°C. Refining; at the end of refining, after adjusting the temperature of the alloy melt at 1530-1550°C, it is poured into electrode rods for electroslag remelting; the surface of the electrode rods is coated with aluminum powder mixture and baked, smelted by electroslag remelting, and melted The aluminum content in the whole alloy electroslag ingot is uniform; the alloy electroslag ingot is surface-finished, heated forging and hot-rolled into straight bars, and then the straight bars are peeled and polished to obtain bright iron-chromium-aluminum alloy bars, and finally The bright iron-chromium-aluminum alloy bar is oxidized and roasted to prepare an iron-chromium-aluminum alloy bar with a dense, rough high-temperature-resistant and wear-resistant oxide layer on the surface, which solves the problem of the iron-chromium-aluminum alloy bar oxide layer. Easy to fall off, not wear-resistant, poor insulation problems.

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 Patents(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