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Atmospheric corrosion resisting steel with yield strength more than 400MPa

A technology of atmospheric corrosion-resistant steel and yield strength, which is applied in the field of low-alloy steel manufacturing, can solve the problems of high production cost and low yield strength, and achieve the effects of easy production process, excellent mechanical properties and reduced production cost

Inactive Publication Date: 2008-08-06
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of low yield strength and high production cost of the existing atmospheric corrosion-resistant steel, and provides an atmospheric corrosion-resistant steel with a yield strength greater than 400 MPa, which has excellent mechanical properties and strong atmospheric corrosion resistance , low production cost

Method used

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  • Atmospheric corrosion resisting steel with yield strength more than 400MPa
  • Atmospheric corrosion resisting steel with yield strength more than 400MPa

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Effect test

Embodiment 1

[0022] According to the above production process, steel 1 was produced, wherein the chemical composition of steel 1 is shown in 1 in Table 1, the mechanical properties of steel 1 are shown in 1 in Table 2, and the atmospheric corrosion resistance results of steel 1 are shown in 1 in Table 3.

Embodiment 2

[0024] According to the above production process, steel 2 is produced, wherein the chemical composition of steel 2 is shown in 2 in Table 1, the mechanical properties of steel 2 are shown in 2 in Table 2, and the atmospheric corrosion resistance results of steel 2 are shown in 2 in Table 3.

Embodiment 3

[0026] According to the above production process, steel 3 is produced, wherein the chemical composition of steel 3 is shown in 3 in Table 1, the mechanical properties of steel 3 are shown in 3 in Table 2, and the atmospheric corrosion resistance results of steel 3 are shown in 3 in Table 3.

[0027] In order to better reflect the advantages of the atmospheric corrosion resistance of the steel of the present invention, a group of comparative steel atmospheric corrosion resistance results are provided in this embodiment, see comparison 1 in Table 3.

[0028] Table 1 Chemical composition (Wt%) of steel of embodiment of the present invention

[0029]

[0030] The mechanical property of table 2 embodiment steel of the present invention

[0031]

[0032] Table 3 Atmospheric corrosion resistance results of the embodiment steel of the present invention and comparative steel

[0033]

[0034] Table 1 is the chemical composition of the steel of the embodiment of the pre...

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Abstract

The invention provides atmospheric corrosion resistant steel whose yield strength is more than 400MPa grade aiming at the defects that the yield strength of existing atmospheric corrosion resistant steel is comparatively low and the producing cost is over high, which is composed of components with following weight percent: C 0.06-0.12 %, Si 0.25-0.55%, Mn 0.30-0.80%, P 0.07-0.12%, S<=0.020%, Cu 0.25-0.55%, Cr 0.30-0.80% and Ni 0.30-0.6%, and allowance is Fe and unavoidable impurity. The mechanical ability of the steel of the invention is excellent, the atmospheric corrosion resistant performance is comparatively strong, and the producing cost is low, which is beneficial for extending and applying.

Description

technical field [0001] The invention relates to an atmospheric corrosion-resistant steel with a yield strength greater than 400 MPa, belonging to the field of low-alloy steel manufacturing. Background technique [0002] Atmospheric corrosion-resistant steel belongs to low-carbon low-alloy steel, which is widely used in the manufacture of railway vehicles, transmission towers, bridges and long-term outdoor engineering components. The United States began to develop atmospheric corrosion-resistant steel in 1913, and developed CorTen-A steel mainly based on Cu-P-Cr-Ni system and CorTen-B steel mainly based on low-P and high-manganese alloys; Developed on the basis of American CorTen series steel, a series of corresponding atmospheric corrosion-resistant steels have been developed, and have been widely used, but like CorTen series steel, its yield strength is 345MPa, and the strength level is low. . my country began to develop atmospheric corrosion-resistant steel in the 1960s....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42
Inventor 陈吉清陈邦文刘志勇胡敏宋育来
Owner 武钢集团有限公司
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