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Production process of nickel-saving high-strength austenitic stainless steel

A technology of austenitic stainless steel and production process, applied in the field of production process of nickel-saving high-strength austenitic stainless steel, can solve the problems of high nickel content, affecting high-temperature thermoplasticity of materials, poor surface quality, etc.

Active Publication Date: 2021-06-18
浙江友谊新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] High-strength austenitic stainless steel must not only ensure excellent low-temperature strength and plastic toughness, better cold-worked myocardial infarction, but also high corrosion resistance, but there are still many deficiencies in the existing austenitic stainless steel production process , Excessive nickel content will not increase the production cost, but also has certain toxicity; improper control of chromium equivalent and nickel equivalent will easily lead to a certain amount of high-temperature ferrite structure in the high-temperature state of the material, which will affect the high-temperature thermoplasticity of the material; Problems such as excessive hardness, uneven structure, poor yield and tensile properties, and poor surface quality

Method used

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  • Production process of nickel-saving high-strength austenitic stainless steel
  • Production process of nickel-saving high-strength austenitic stainless steel
  • Production process of nickel-saving high-strength austenitic stainless steel

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] Such as Figure 1 to Figure 2 The production process of nickel-free high-strength austenitic stainless steel shown includes the following procedures and steps:

[0044] 1) Clean up the residue in the ladle and heat the ladle to 850°C;

[0045] 2) Electric Furnace Melting

[0046] 2.1) The amount of C in the electric furnace is 1.3%, the amount of Si is 1.1%, the content of P in the ingredients is 0.03%, and the binary basicity of the final slag is controlled at 1.5;

[0047] 2.2) The charge of the electric furnace is exhausted, and the tapping temperature is ≥1600°C;

[0048] 3) AOD refining

[0049] 3.1) Carry out slag removal treatment to the molten steel, after the slag removal, the molten steel is blended into the AOD furnace, and the components are sampled and analyzed, and the temperature of the molten steel is measured;

[0050] 3.2) During the aging...

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Abstract

The invention discloses a production process of nickel-saving high-strength austenitic stainless steel. The purpose of saving nickel by replacing part of nickel element with manganese, nitrogen and copper is achieved, and the purpose of producing the high-strength austenitic stainless steel which is more economical and has the performance better meeting the actual requirements is achieved by proportioning the elements and optimizing the time and temperature in the production process. According to the technical scheme, the method is characterized by comprising the following steps that 1, a steel ladle is preheated; 2, electric furnace smelting, AOD refining, LF furnace refining and continuous casting procedures are sequentially carried out, slag charge containing alloy elements Cr, Mn, Ni and Cu is added in the AOD refining procedure for blowing, all the elements are adjusted to the target component range, and then the content of the target component is more accurate through LF furnace refining; and 3, the steel billet performance is improved through annealing and pickling procedures.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a production process of nickel-saving high-strength austenitic stainless steel. Background technique [0002] In recent years, due to its good performance, stainless steel has been widely and widely used in various industrial fields and daily life. In recent years, the global price of nickel metal has risen, and the supply of nickel metal resources in my country has gradually decreased. [0003] As an emerging steel material, high-nitrogen steel mainly improves the strength, toughness and corrosion resistance of steel through nitrogen alloying, and replaces precious metal elements (such as nickel) to reduce costs. Among them, the research of nitrogen alloying in austenitic steel has become a hot spot, which has attracted great attention at home and abroad and extensive research has been carried out, especially for high-nitrogen austenitic stainless steel. The research and developme...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/42C22C38/58C23G1/08C25F1/06C21B3/10C21D1/26C21D6/00C21D9/00C21D11/00
CPCC22C33/04C22C38/02C22C38/002C22C38/58C22C38/001C22C38/42C21D1/26C21D11/00C21D9/0081C21D6/004C21D6/005C21D6/008C23G1/086C25F1/06C21B3/10
Inventor 胡涛杨伟标张奇
Owner 浙江友谊新材料有限公司
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