Sulfuric acid and chloride ion corrosion resistant steel plate containing Sn and Sb and manufacturing method thereof

A technology of chloride ion corrosion and manufacturing method, which is applied in the direction of manufacturing tools, metal rolling, temperature control, etc., can solve the problems that cannot meet the requirements of corrosion resistance performance, and achieve the effect of good surface quality and cold bending performance

Pending Publication Date: 2022-03-15
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
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Problems solved by technology

The material also cannot meet the corrosion resistance requirement

Method used

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  • Sulfuric acid and chloride ion corrosion resistant steel plate containing Sn and Sb and manufacturing method thereof
  • Sulfuric acid and chloride ion corrosion resistant steel plate containing Sn and Sb and manufacturing method thereof
  • Sulfuric acid and chloride ion corrosion resistant steel plate containing Sn and Sb and manufacturing method thereof

Examples

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Embodiment 1

[0044] The microstructure of embodiment 1 and comparative example 5 see image 3 , Figure 4 , the volume ratio of P tissue in Example 1 is about 5.49%, the volume ratio of F tissue is about 94.51%, and the grain size is 10.5. The volume ratio of P tissue in Comparative Example 5 is about 3.12%, and the volume of F tissue accounts for The ratio is about 96.88%, and the grain size is 9.5.

[0045] Each embodiment of table 1 and comparative example steel plate composition

[0046]

[0047] Table 2 main process parameters, performance and surface quality of each embodiment and comparative example rolling process

[0048]

[0049] In Comparative Example 1 and Comparative Example 2, only the Sn content control requirement in the chemical composition is changed on the basis of Example 1, and the technical requirements of Example 1 are implemented for the rest. The chemical composition of Comparative Example 3 does not meet the requirements of the present invention, and the ...

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Abstract

The invention provides a steel plate containing Sn and Sb and resistant to corrosion of sulfuric acid and chloride ions and a manufacturing method of the steel plate. The steel plate comprises the following components: 0.050-0.079% of C; 0.20% to 0.45% of Si; 0.60% to 1.00% of Mn; less than or equal to 0.025% of P; s < = 0.0040%; 0.90% to 1.10% of Cr; ni: 0.05 to 0.30%; 0.20% to 0.40% of Cu; the content of Als is 0.025% to 0.050%; 0.035% to 0.050% of Ti; 0.08 to 0.14 percent of Sb; 0.10% to 0.15% of Sn; n < = 0.0040%; and the balance of Fe and inevitable inclusions. And the Sn-Sb-containing sulfuric acid and chloride ion corrosion-resistant steel plate is formed by matching with key field control processes such as a plate blank heating process and the like. The surface quality and the cold bending performance are good; the yield strength is not less than 345MPa, the tensile strength is not less than 470MPa, and the ductility is not less than 25%.

Description

technical field [0001] The invention belongs to the field of iron and steel materials and its manufacture, and in particular relates to a steel plate containing Sn and Sb resistant to sulfuric acid and chloride ion corrosion and a manufacturing method thereof. Background technique [0002] Weathering steel is atmospheric corrosion resistant steel. Compared with stainless steel, it can greatly reduce the manufacturing cost, and has good welding performance. Compared with ordinary carbon steel, it has good atmospheric corrosion resistance. [0003] In the existing corrosion-resistant steel manufacturing technology, the publication number CN 101775544 A published on July 14, 2010 discloses a sulfuric acid dew point corrosion-resistant steel KNS and its rolling method. Its chemical composition is: C≤0.10%, Si: 0.30%~0.40%, Mn: 0.70%~0.80%, V≤0.010%, Cu: 0.20~0.30%, Cr: 0.60%~0.90%, Ti: 0.015%~0.025%, Sb: ≤0.010%, S: ≤0.020%, P: ≤0.020%, the rest is Fe and unavoidable impurities...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C22C38/60B21B1/26B21B37/74B21B45/00C21D8/02
CPCC22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C22C38/60C22C38/008C21D8/0205C21D8/0221B21B1/26B21B45/004B21B37/74C21D2211/005C21D2211/009
Inventor 胡学文郭锐何博石践汪飞王海波游慧超闻成才王立兵强孙燕张杨文亮郑晴
Owner MAANSHAN IRON & STEEL CO LTD
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