Corrosion-resistant super austenitic stainless steel and manufacturing technique thereof

A technology of austenitic stainless steel and manufacturing process, applied in the field of corrosion-resistant super austenitic stainless steel and its manufacturing process, can solve problems such as low strength, and achieve the effects of improving alloy life, excellent corrosion resistance, and good mechanical properties at room temperature

Inactive Publication Date: 2018-10-12
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but low strength

Method used

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  • Corrosion-resistant super austenitic stainless steel and manufacturing technique thereof
  • Corrosion-resistant super austenitic stainless steel and manufacturing technique thereof
  • Corrosion-resistant super austenitic stainless steel and manufacturing technique thereof

Examples

Experimental program
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Effect test

Embodiment 1-14

[0030] The composition of the super austenitic stainless steel in Examples 1-14 is shown in Table 1. The specific processing technology of stainless steel is as follows:

[0031] (1) Smelting: use any one of vacuum induction furnace, electric furnace and out-of-furnace refining, converter and out-of-furnace refining to smelt other components except rare earth elements, add rare earth elements before tapping and casting, and control the casting temperature at 1500 -1650°C;

[0032] (2) Ingot casting or ingot billet opening: Forging billet opening or continuous casting and rolling is adopted, the heating temperature is 1100-1250 °C, the initial forging temperature of billet opening is controlled at 1050-1150 °C, and the final forging temperature is controlled at 950-1050 °C ;

[0033] (3) Hot rolling: the billet heating temperature is 1100-1250°C, the starting rolling temperature is controlled at 1050-1150°C, and the final rolling temperature is controlled at 950-1050°C;

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Abstract

The invention particularly relates to corrosion-resistant super austenitic stainless steel and a manufacturing technique thereof. The stainless steel comprises the following components of, by weight percentage, less than or equal to 0.03% of C, less than or equal to 0.02% of S, less than or equal to 0.03% of P, less than or equal to 1.0% of Si, 8.0-10.0% of Mn, 19.0-23.0% of Cr, 13.0-15.0% of Ni,3.0-5.0% of Mo, 1.0-2.5% of Cu, less than or equal to 0.5% of W, less than or equal to 0.3% of V, less than or equal to 0.3% of Nb, less than or equal to 0.1% of B, 0.3-0.5% of N, 0.001-0.1% of rare earth, and the balance Fe. The super austenitic stainless steel is low in cost and excellent in corrosion resistance, and can better adapt to equipment development under the harsh condition of the high-corrosion environment such as sulfuric acid and seawater.

Description

technical field [0001] The invention belongs to the technical field of stainless steel alloy materials, and in particular relates to a corrosion-resistant super austenitic stainless steel and a manufacturing process thereof. Background technique [0002] In layman's terms, stainless steel is steel that is not easy to rust. In fact, some stainless steels have both stainless and corrosion resistance. The stainless and corrosion resistance of stainless steel is due to the formation of chromium-rich oxide film on its surface, which is relative to the stainless and corrosion resistance. Tests have shown that the corrosion resistance of stainless steel increases with the increase of chromium content in steel in weak media such as air and water and oxidizing media such as nitric acid. When the chromium content reaches a certain percentage, the corrosion resistance of steel changes suddenly. That is, from easy to rust to not easy to rust, from non-corrosion resistant to corrosion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/02C22C38/44C22C38/42C22C38/46C22C38/48C22C38/54C21D8/00
CPCC22C38/58C21D8/005C21D2211/001C22C38/001C22C38/005C22C38/02C22C38/42C22C38/44C22C38/46C22C38/48C22C38/54
Inventor 刘晓陈晓阳李兴成任维彬
Owner JIANGSU UNIV OF TECH
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