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Low-carbon high-strength steel with resistance to seawater corrosion, and manufacturing method thereof

A low-alloy, high-strength, seawater-resistant technology, applied in the field of steel materials, can solve the problems of high preparation cost, poor practicability, and inability to truly achieve corrosion resistance, and achieve the effects of improving mechanical properties, preventing corrosion, and refining grains

Inactive Publication Date: 2022-01-11
CAIGUJINDAI (FOSHAN) METAL COMPOSITE MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The steel materials disclosed in the above patents cannot really achieve the effect of corrosion resistance, and the preparation cost is high, and the practicability is relatively poor

Method used

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  • Low-carbon high-strength steel with resistance to seawater corrosion, and manufacturing method thereof
  • Low-carbon high-strength steel with resistance to seawater corrosion, and manufacturing method thereof
  • Low-carbon high-strength steel with resistance to seawater corrosion, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a kind of seawater corrosion-resistant low-alloy high-strength steel, comprising the following components by weight percentage:

[0030] C: 0.02~0.04%;

[0031] Si: 0.10~0.20%;

[0032] Mn: 0.12~0.15%;

[0033] Al: 0.02~0.03%;

[0034] Cr: 1.20~1.50%;

[0035] Ni: 0.20~0.30%;

[0036] Cu: 0.30~0.40%;

[0037] Zr+Ti: 0.02~0.03%;

[0038] Re: 0.05~0.06%;

[0039] P: ≤0.015%, S: ≤0.008%, and the rest are Fe and unavoidable impurities.

[0040] The production method of corrosion-resistant low-carbon high-strength steel is: TMCP+normalizing.

[0041] The seawater corrosion-resistant low-alloy high-strength steel prepared in Example 1 is denoted as Zr-Ti-Re.

Embodiment 2

[0043] This embodiment provides a kind of seawater corrosion-resistant low-alloy high-strength steel, comprising the following components by weight percentage:

[0044] C: 0.024%;

[0045] Si: 0.10%;

[0046] Mn: 0.12%;

[0047] Al: 0.02%;

[0048] Cr: 1.20%;

[0049] Ni: 0.20%;

[0050] Cu: 0.30%;

[0051] Zr+Ti: 0.02%;

[0052] Re: 0.05%;

[0053] P: ≤0.015%, S: ≤0.008%, and the rest are Fe and unavoidable impurities.

[0054] The production method of corrosion-resistant low-carbon high-strength steel is: TMCP+normalizing.

Embodiment 3

[0056] This embodiment provides a kind of seawater corrosion-resistant low-alloy high-strength steel, comprising the following components by weight percentage:

[0057] C: 0.03%;

[0058] Si: 0.15%;

[0059] Mn: 0.13%;

[0060] Al: 0.024%;

[0061] Cr: 1.30%;

[0062] Ni: 0.25%;

[0063] Cu: 0.34%;

[0064] Zr+Ti: 0.025%;

[0065] Re: 0.055%;

[0066]P: ≤0.015%, S: ≤0.008%, the rest is Fe and unavoidable impurities;

[0067] The production method of corrosion-resistant low-carbon high-strength steel is: TMCP+normalizing.

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Abstract

The invention provides low-carbon high-strength steel with resistance to seawater corrosion, and a manufacturing method thereof. The low-carbon high-strength steel is composed of, by weight, 0.02%-0.05% of C, 0.10%-0.30% of Si, 0.10%-0.15% of Mn, 0.02%-0.04% of Al, 1.00%-1.50% of Cr, 0.20%-0.40% of Ni, 0.30%-0.50% of Cu, 0.02%-0.03% of Zr + Ti, 0.05%-0.08% of Re, no more than 0.015% of P, no more than 0.008% of S and the balance Fe and inevitable impurities. A TMCP process and a normalizing treatment mode are adopted. The tensile strength of the low-alloy high-strength steel with resistance to seawater corrosion is 400-600 MPa; The percentage elongation after fracture is greater than or equal to 30%. and the -40 DEG C low-temperature toughness is greater than or equal to 300, and the steel plate is excellent in mechanical comprehensive performance and high in seawater corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of steel materials, in particular to a low-carbon high-strength seawater corrosion-resistant steel and a manufacturing method thereof. Background technique [0002] Low-alloy high-strength steel is widely used in marine engineering construction because of its excellent mechanical properties and good welding performance. However, high temperature, high humidity, high salt content, and the harsh marine environment of alternating dry and wet conditions make ordinary steel materials extremely prone to corrosion, bringing huge economic losses to society and even threatening personal safety. In the face of the severe marine corrosion situation, marine engineering steels, mainly low-alloy high-performance steels, have emerged; low-alloy steels for marine engineering are based on carbon steel, adding one or several alloying elements, such as Mn, Si , Cr, Ni, Cu, etc. to improve the mechanical and corrosion resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C21D1/28C21D6/00B21B37/74
CPCC22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C22C38/005C21D1/28C21D6/004C21D6/005C21D6/008B21B37/74
Inventor 成林周峰吴开明
Owner CAIGUJINDAI (FOSHAN) METAL COMPOSITE MATERIALS CO LTD
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