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Duplex stainless steel

A duplex stainless steel, high content technology, applied in the field of stainless steel, to achieve the effect of chemical process and improve corrosion resistance

Inactive Publication Date: 2021-06-25
四川金恒液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the hardness and corrosion resistance of duplex stainless steel need to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a double-phase stainless steel, including: 0.5 parts by mass, a silicon content, a silicon content of 3.8 parts, a molydendenid content of 3.6 parts, a chromium content of 18.5 parts, and a tungsten content of 3.4. The nitrogen content is 0.21 parts, the copper content is 0.6, the vanadium content is 0.15 parts, and the iron content is supplemented to 100 parts; the hot rolling is prepared by two heating, and a small amount of nitrogen is introduced in the argon environment when heated twice. The nitrogen flow rate is 30 L / min. It also includes a manganese content of 1.6 copies. It also includes a phosphorus content of 0.011 parts. It also includes 0.008 sulfur content.

[0038] The hot rolled process flow is entered, the first heating, the first rough rolling, cooling grinding, second heating, second rough rolling, finishing, and rolled.

[0039] The first heating temperature is 1060 degrees Celsius.

[0040] The second heating temperature is 110...

Embodiment 2

[0042] This embodiment provides a double-phase stainless steel, which includes: 0.7 parts by mass, a silicon content of 0.7 parts, and a nickel content of 4.1 parts, a molybdenum content of 17.6 parts, and a tungsten content of 3.1 parts. The nitrogen content is 0.18 parts, the copper content is 0.6 parts, the vanadium content of 0.13 parts, the iron content is supplemented to 100 parts; the hot rolling is prepared by two heating, and a small amount of nitrogen is introduced in the argon environment during both heating. The flux of nitrogen is 30 L / min. It also includes a manganese content of 1.0. Also included in the phosphorus content is 0.013 parts. It also includes 0.006 sulfur content.

[0043] The hot rolled process flow is entered, the first heating, the first rough rolling, cooling grinding, second heating, second rough rolling, finishing, and rolled.

[0044] The first heating temperature is 1040 degrees Celsius.

[0045] Preferably, the second heating temperature is 11...

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PUM

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Abstract

The invention discloses duplex stainless steel which comprises the following components in parts by mass: less than 0.05 part of carbon, 0.2 to 1.0 part of silicon, 3.5 to 4.0 parts of nickel, 2.0 to 5.0 parts of molybdenum, 15.0 to 20.0 parts of chromium, less than 5.0 parts of tungsten, 0.1 to 0.3 part of nitrogen, less than 0.8 part of copper, less than 0.2 part of vanadium and the balance of iron, wherein the total amount of the components is 100 parts. During preparation, two-time heating is adopted for hot rolling, and a small amount of nitrogen is introduced in an argon environment during two-time heating.

Description

Technical field [0001] The present invention relates to the field of stainless steel, in particular a duplex stainless steel. Background technique [0002] Duplex Stainless Steel (DSS), which points to 50% of ferritic and Austenites, generally less phase content, also requires 30% stainless steel. In the lower case containing, the CR content is 18% to 28%, and the Ni content is 3% to 10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N. [0003] The type of steel and ferrite stainless steel, compared to ferrite, the plasticity, toughness, free chain, and the corrosion resistance and welding performance of the abstraction are significantly improved, while maintaining iron The 475 ° C brittleness of the body stainless steel and the high thermal conductivity are characterized by superplasticity. Compared with the austenite stainless steel, the strength is high, and the corrosion resistance and chloride stress corrosion are significantly improved. Double phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C21D1/74C21D8/02
CPCC21D1/74C21D8/0205C21D8/0226C21D8/0247C22C38/001C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46
Inventor 王进彭丽霞何黎陆星
Owner 四川金恒液压有限公司
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