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A manufacturing method and steel technology, applied in the field of alloy steel manufacturing, can solve the problems of high strength, microbial corrosion resistance, sulfide stress corrosion resistance, etc.
Active Publication Date: 2022-01-04
HENGYANG VALIN STEEL TUBE +1
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[0003] The main purpose of the present invention is to provide a kind of steel, preparation method and application thereof, to solve the problem that existing steel cannot simultaneously meet high strength, high toughness, resistance to sulfide stress corrosion (SSC) and resistance to microbial corrosion (MIC)
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Embodiment 1
[0046] In terms of weight percentage, the chemical composition of steel is: C 0.091%, Si 0.24%, Mn 0.51%, Cu0.92%, Al 0.32%, Ce 0.12%, Cr 1.0%, Mo 0.82%, Nb 0.004%, V 0.20 %, Ti 0.001%, N 0.003%, S 0.001%, P 0.002%, O 0.002%, Ca 0.005%, and the balance is Fe. Wherein, the sum of the content of Cu element, Al element and Ce element is 1.36%.
Embodiment 2
[0048] In terms of weight percentage, the chemical composition of steel is: C 0.14%, Si 0.21%, Mn 0.50%, Cu 0.93%, Al 0.42%, Ce 0.15%, Cr 1.0%, Mo 0.85%, Nb 0.003%, V 0.005% , Ti 0.002%, N0.005%, S 0.001%, P 0.002%, O 0.004%, B 0.001%, and the balance is Fe. Wherein, the sum of the contents of Cu element, Al element and Ce element is 1.50%.
Embodiment 3
[0050] In terms of weight percentage, the chemical composition of steel is: C 0.097%, Si 0.22%, Mn 0.59%, Cu1.17%, Al 0.22%, Ce 0.13%, Cr 1.02%, Mo 0.80%, V 0.10%, N 0.004 %, S 0.001%, P 0.002%, O 0.003%, B 0.001%, and the balance is Fe. Wherein, the sum of the content of Cu element, Al element and Ce element is 1.52%.
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Abstract
The invention provides a steel material, a preparation method and an application thereof. Including: dosing according to the following chemical composition to obtain raw materials: by weight percentage, the raw materials include C 0.08-0.30%, Si≤0.5%, Mn≤1.0%, Cu 0.5-2.0%, Al≤1.0%, Ce 0.01- 0.2%, Cr 0.5~1.5%, Mo 0.5~1.5%, V≤0.3%, N≤0.005%, O≤0.005%, S≤0.005%, P≤0.005%, the balance is Fe; the raw materials are smelted in sequence , pouring and post-treatment to obtain steel, and when the content of O and S elements in the reaction product system is not more than 0.005wt%, Ce is added to the reaction product system. The obtained steel has the advantages of high strength, high toughness, sulfide stress corrosion resistance and microbial corrosion resistance, and realizes the integration of structure and function.
Description
technical field [0001] The invention relates to the field of alloy steel manufacturing, in particular to a steel material, a preparation method and an application thereof. Background technique [0002] Pipeline corrosion is a serious problem in the process of oil and gas exploration, gathering and transportation. Hydrogen sulfide (H 2 S) caused by sulfide stress corrosion (SSC) and microbial corrosion (MIC) are two important forms of pipeline corrosion. MIC is mainly based on localized corrosion (pitting corrosion). The occurrence and development of corrosion are unpredictable, and there are no rules to follow in the corrosion site. In recent years, frequent pipeline leakage accidents caused by MIC have caused huge economic losses to the oil and gas industry. At the same time, the pitting corrosion caused by MIC is also the crack source of SSC cracking, and the two promote each other, which brings great challenges to corrosion protection. In addition to corrosion resista...
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