Steel material and preparing method thereof

A billet and raw material technology, applied in the field of steel materials and their preparation, can solve problems such as national economic loss and corrosion, and achieve the effects of low production cost, improved corrosion resistance, and strong corrosion resistance

Active Publication Date: 2018-10-26
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Corrosion of metal materials is a ubiquitous practical problem, and the loss caused by atmospheric corrosio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Melting and casting the alloy raw materials to obtain a billet with the target composition: C: 0.08wt%, Si: 0.34wt%, Mn: 1.15wt%, P: 0.004wt%, S: 0.003wt%, Cr: 0.51wt%, Ni: 0.23wt%, Cu: 0.3wt%, V: 0.05wt%, Nb: 0.022wt%, Sb: 0.42wt%, and the balance is Fe and unavoidable impurities.

[0049] Hot rolling, cooling and coiling the obtained billet to obtain steel material;

[0050] The starting temperature of the hot rolling is 1150°C, and a steel plate with a thickness of 6mm is obtained through multiple hot rolling;

[0051] The cooling method is water cooling, and the cooling temperature is 600°C.

[0052] Using the standard of TB / T 2375-1993 "Test Method for Periodic Infiltration Corrosion of Weathering Steel for Railways", the atmospheric corrosion resistance of the steel material prepared in Example 1 of the present invention was tested. The test result is: the relative corrosion rate of the atmospheric corrosion resistance of the steel material prepared in Example 1 o...

Embodiment 2

[0057] According to the method described in Example 1, the steel material is prepared. The difference from Example 1 is that the composition of the billet is: C: 0.06wt%, Si: 0.31wt%, Mn: 1.07wt%, P: 0.004wt%, S: 0.004wt%, Cr: 0.48wt%, Ni: 0.21wt%, Cu: 0.34wt%, V: 0.05wt%, Nb: 0.025wt%, Sb: 0.68wt%, the balance is Fe and unavoidable Impurities.

[0058] According to the method of Example 1, the performance of the steel material prepared in Example 2 of the present invention is detected, and the test result is that the atmospheric corrosion resistance of the steel material prepared in Example 2 of the present invention: the relative corrosion rate is 20%; the acid corrosion resistance 10%.

Embodiment 3

[0060] According to the method described in Example 1, the steel material is prepared. The difference from Example 1 is that the composition of the billet is: C: 0.07wt%, Si: 0.26wt%, Mn: 1.17wt%, P: 0.005wt%, S: 0.004wt%, Cr: 0.52wt%, Ni: 0.21wt%, Cu: 0.32wt%, V: 0.06wt%, Nb: 0.023wt%, Sb: 0.95wt%, the balance is Fe and unavoidable Impurities.

[0061] According to the method of Example 1, the performance of the steel material prepared in Example 3 of the present invention is detected, and the test result is that the atmospheric corrosion resistance of the steel material prepared in Example 3 of the present invention: the relative corrosion rate is 18%; the acid corrosion resistance 7%.

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Abstract

The invention provides a steel material. The steel material comprises components including smaller than or equal to 0.12wt% of C, smaller than or equal to 0.75 wt% of Si, smaller than or equal to 1.5wt% of Mn, smaller than or equal to 0.02 wt% of P, smaller than or equal to 0.008 wt% of S, 0.2-0.55 wt% of Cu, 0.3-1.25 wt% of Cr, 0.12-0.65 wt% of Ni, smaller than or equal to 0.1 wt% of V, smallerthan or equal to 0.1 wt% of Nb, 0.41-1 wt% of Sb and the balance Fe and inevitable impurities. The proper amount of Sb element is added in the provided steel material, oxidization is not likely to happen at the normal temperature, the anti-corrosion performance is high, the Sb element is prone to being dissolved in hot nitric acid, hydrous antimony oxide is formed and can be reacted with hot sulfuric acid, antimony sulfate is produced, and activity of acid and corrosion to the steel material can be reduced. The invention further provides a preparing method of the steel material.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a steel material and a preparation method thereof. Background technique [0002] Corrosion of metal materials is a ubiquitous practical problem, and the loss caused by atmospheric corrosion accounts for about half of the total metal corrosion loss, which has brought huge losses to the national economy. According to the statistics of developed countries, the annual economic losses caused by the corrosion of steel materials account for about 2% to 4% of the national economic output value, and the annual economic losses caused by the corrosion of structural steel materials in the world have reached hundreds of billions of dollars. Therefore, how to improve the corrosion resistance of steel materials in the atmosphere has attracted much attention. [0003] In the 1930s, the United States took the lead in developing Cor-Ten series weathering steel, which is still in use today...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/46C22C38/60C22C33/04C21D8/02
CPCC21D8/0205C22C33/04C22C38/02C22C38/04C22C38/42C22C38/46C22C38/60
Inventor 李正荣崔凯禹汪创伟肖尧
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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