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High-temperature-resistant alloy steel and preparation method thereof

An alloy steel and high temperature resistant technology, applied in the field of high temperature resistant alloy steel and its preparation, can solve the problems of high material cost, high addition of precious alloy elements, insufficient high temperature oxidation resistance of materials, etc., and achieves high temperature oxidation resistance. Effect

Inactive Publication Date: 2016-06-22
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned invention has defects such as a large amount of precious alloy elements added, high material cost, and insufficient high-temperature oxidation resistance of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The chemical composition of alloy steel is as follows: 0.40wt% nickel, 1.10wt% manganese, 0.27wt% silicon, 0.16wt% carbon, 0.04wt% boron, 0.015wt% phosphorus, 0.02wt% sulfur, 0.09wt% chromium, 0.13wt% vanadium , 0.25wt% copper, 0.05wt% molybdenum, 0.09wt% titanium, 0.03wt% niobium, 0.13wt% rubidium, 0.09wt% thorium, 0.08wt% erbium and thulium, and the balance is iron; wherein, the thulium content is 3 times the content of erbium.

Embodiment 2

[0017] The chemical composition of alloy steel is as follows: 0.30wt% nickel, 0.80%wt% manganese, 0.20wt% silicon, 0.14wt% carbon, 0.02wt% boron, 0.01wt% phosphorus, 0.015wt% sulfur, 0.08wt% chromium, 0.06wt% Vanadium, 0.2wt% copper, 0.02wt% molybdenum, 0.08wt% titanium, 0.02wt% niobium, 0.06wt% rubidium, 0.08wt% thorium, 0.06wt% erbium and thulium, and the balance is iron; wherein, the thulium content Twice the content of erbium.

Embodiment 3

[0019] The chemical composition of alloy steel is as follows: 0.50wt% nickel, 1.40wt% manganese, 0.34wt% silicon, 0.18wt% carbon, 0.06wt% boron, 0.02wt% phosphorus, 0.025wt% sulfur, 0.1wt% chromium, 0.2wt% vanadium , 0.3wt% copper, 0.08wt% molybdenum, 0.1wt% titanium, 0.04wt% niobium, 0.2wt% rubidium, 0.1wt% thorium, 0.1wt% erbium and thulium, and the balance is iron; wherein, the thulium content is 4 times the content of erbium.

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PUM

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Abstract

The invention discloses high-temperature-resistant alloy steel and a preparation method thereof. The high-temperature-resistant alloy steel comprises, by weight, 0.30-0.50% of nickel, 0.80-1.40% of manganese, 0.20-0.34% of silicon, 0.14-0.18% of carbon, 0.02-0.06% of boron, 0.01-0.02% of phosphorus, 0.015-0.025% of sulphur, 0.08-0.1% of chromium, 0.06-0.2% of vanadium, 0.2-0.3% of copper, 0.02-0.08% of molybdenum, 0.08-0.1% of titanium, 0.02-0.04% of niobium, 0.06-0.2% of rubidium, 0.08-0.1% of thorium, 0.06-0.1% of erbium and thulium and the balance iron, wherein the content of thulium is 2-4 times that of erbium. The novel alloy steel material has excellent high temperature oxidation resistance and can be used for producing workpieces high in high temperature oxidation resistance. The high temperature oxidation resistance of the novel alloy steel material is related to the content ratios of thulium and erbium in the alloy steel.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a high-temperature-resistant alloy steel and a preparation method thereof. Background technique [0002] Excellent high temperature strength, good oxidation resistance and high temperature corrosion resistance are the characteristics that must be possessed by key components of cracking furnace tubes. It is generally believed that during the high-temperature service of the alloy, the formation of a complete and dense layer of chromium oxide on the surface of the material can effectively protect the matrix and improve the service life of the alloy. On this basis, some people promote the formation of a layer of dense chromium oxide on the surface of the alloy by pre-oxidation to improve the high-temperature corrosion resistance of the alloy. However, due to the influence of thermal stress during the service of the alloy, the oxide film is easy to peel off, thus losing its p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/08C22C38/04C22C38/02C22C38/32C22C38/18C22C38/12C22C38/16C22C38/14
CPCC22C38/08C22C38/005C22C38/02C22C38/04C22C38/12C22C38/14C22C38/16C22C38/18C22C38/32
Inventor 徐挺
Owner 徐挺