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A kind of high-strength and high-corrosion-resistant super austenitic stainless steel and its preparation method

A kind of austenitic stainless steel, high corrosion resistance technology, applied in the field of stainless steel, can solve the problems of low strength, poor corrosion resistance, poor structure stability, etc., to achieve the effect of excellent corrosion resistance

Active Publication Date: 2022-04-19
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a high-strength and high-corrosion-resistant super austenitic stainless steel and its preparation method, which can solve the problems of low strength, poor structure stability and poor corrosion resistance of existing materials, so as to meet the requirements of high-end equipment in petrochemical and other fields. Requirements for the use of key materials under service conditions

Method used

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  • A kind of high-strength and high-corrosion-resistant super austenitic stainless steel and its preparation method
  • A kind of high-strength and high-corrosion-resistant super austenitic stainless steel and its preparation method
  • A kind of high-strength and high-corrosion-resistant super austenitic stainless steel and its preparation method

Examples

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preparation example Construction

[0045] On the other hand, the present invention also provides a preparation method of high-strength and high-corrosion-resistant super austenitic stainless steel, comprising the following steps:

[0046] (1) Smelting by electric furnace / converter+AOD+LF process to obtain stainless steel water with qualified composition;

[0047] (2) water-casting or die-casting the stainless steel to obtain a slab;

[0048] (3) homogenizing the cast slab, and then forging or hot rolling to obtain a steel plate;

[0049] (4) After performing solution treatment and aging treatment on the steel sheet, a high-strength and high-corrosion-resistant super austenitic stainless steel is obtained.

[0050]Wherein, the stainless steel water with qualified components, by weight percentage, includes C 0.01%-0.03%, Si 0.3%-0.7%, Mn 1%-2.5%, P≤0.040%, S≤0.004%, Cr 21 %~24%, Ni 17%~20%, Mo 4.5%~6%, W 0.5%~2.5%, Cu 1%~2.5%, Nb 0.1%~0.4%, V 0.05%~0.25%, Ti 0.1% ~0.4%, Co 0.3%~0.7%, N 0.23%~0.3%, B 0.001%~0.0...

Embodiment

[0057] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the described examples. The experimental methods that do not specify specific conditions in the following examples are in accordance with conventional methods and conditions.

[0058] In Table 1, Comparative Example 1 shows the chemical composition and content of S31254 stainless steel, Comparative Example 2 shows the chemical composition and content of N08367 stainless steel, and Comparative Example 3 shows the chemical composition and content of 904L stainless steel. S31254 stainless steel, N08367 stainless steel and 904L stainless steel are all smelted by known preparation methods.

[0059] The chemical composition and content of the high-strength and high-corrosion-resistant super austenitic stainless steels of Examples 1-9 are shown in Table 1, and the preparation method adopted is as follows: smelting by electric furnace / converter+AOD+LF pr...

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Abstract

The invention belongs to the field of stainless steel, and particularly provides a high-strength and high-corrosion-resistant super austenitic stainless steel and a preparation method thereof. The high-strength and high-corrosion-resistant super austenitic stainless steel of the present invention, by weight percentage, includes: C 0.01%-0.03%, Si 0.3%-0.7%, Mn 1%-2.5%, P≤0.040%, S≤0.004% , Cr 21%~24%, Ni 17%~20%, Mo 4.5%~6%, W 0.5%~2.5%, Cu 1%~2.5%, Nb 0.1%~0.4%, V 0.05%~0.25%, Ti 0.1% to 0.4%, Co 0.3% to 0.7%, N 0.23% to 0.3%, B 0.001% to 0.005%, Ce 0.005% to 0.03%, and the balance is Fe and other unavoidable impurity elements. The high-strength and high-corrosion-resistant super austenitic stainless steel of the invention has excellent mechanical properties at room temperature, high-temperature yield strength and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of stainless steel, and particularly provides a high-strength and high-corrosion-resistant super austenitic stainless steel and a preparation method thereof, which are suitable for high-end equipment materials in the fields of petrochemical, environmental protection and papermaking. Background technique [0002] As the basic and strategic industry of economic and social development, equipment manufacturing industry, its development level and modernization degree determine the industrial competitiveness and comprehensive strength of a country or region. With the upgrading of petrochemical, environmental protection, papermaking and other equipment, the service environment of materials has become more and more harsh. Faced with harsh environments such as high acid, high sulfur, chloride ions, high temperature, and high pressure, the corrosion resistance, strength and other properties of stainless steel materials have been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C22C38/58C21D8/02C22C33/04
CPCC22C38/02C22C38/04C22C38/58C22C38/44C22C38/42C22C38/48C22C38/46C22C38/50C22C38/52C22C38/54C22C38/001C22C38/005C22C33/04C21D8/0205C21D8/0226C21D8/0263
Inventor 张威李阳莫金强王鑫潮
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD