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Ultra-strong refractory steel

A heat-resistant steel and super-strength technology, applied in the field of austenitic heat-resistant steel, can solve the problems of unfavorable steel industry development, high nickel content, high price, etc., to achieve improved oxidation resistance, high-temperature strength, and improved The effect of high temperature strength

Inactive Publication Date: 2008-07-30
张光华
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Problems solved by technology

[0002] The austenitic heat-resistant steel in the prior art usually uses chromium-nickel as the main alloying element, especially the heat-resistant alloy steel varieties from abroad in the early stage, which contain high nickel content, and nickel is a scarce resource in my country and is expensive, so Not conducive to the development of my country's steel industry

Method used

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with embodiment.

[0015] The super-strength heat-resistant steel of the present invention comprises components and percentage weights as follows: C is 0.2-0.45, Cr is 22-28, Ni is 3.5-13, Si is 0.1-0.4, N is 0.1-0.4, and RE is 0.01-3, Mo is 0.15-2.3, W is 0.15-2.3, Co is 0-13, Mn is 1-13, Mg is 0.0005-0.10, and the balance is Fe and impurities. The impurities are S and P, and the percentage weight thereof is: neither S nor P is higher than 0.03. Wherein C may preferably be 0.25-0.40. The super-strength heat-resistant steel of the present invention adopts mature metallurgical technology in the field and conventional analysis and detection means in the production process.

[0016] After the above product was produced, the inventors carried out tensile tests and hardness measurements. Related nouns are explained as follows:

[0017] Yield strength: During the stretching process of the sampl...

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Abstract

The invention supplies a supper refractory steel. The feature is the ingredients and proportion: C is 0.2-0.45%, Cr is 22-28%, Ni is 3.5-13%, Si is 0.1-0.4, N is 0.1-0.4, RE is 0.03-3%, Mo is 0.15-2.3%, W is 0.15-2.3%, Co is 0-13%, Mn is 1-13%, Mg is 0.0005-0.10%, and the other ingredients is Fe and impurity.

Description

technical field [0001] The invention relates to austenitic heat-resistant steel in alloy steel, in particular to a super-strength heat-resistant steel suitable for making various heat-resistant components under high-temperature working conditions. Background technique [0002] The austenitic heat-resistant steel in the prior art usually uses chromium-nickel as the main alloying element, especially the heat-resistant alloy steel varieties from abroad in the early stage, which contain high nickel content, and nickel is a scarce resource in my country and is expensive, so It is not conducive to the development of my country's steel industry. For example, the common cast steel models in this industry include ZG3Cr18Ni25Si2 steel, ZG3Cr25Ni20Si2 steel, ZG3Cr25Ni7Si2N steel, ZG3Cr19Ni14 steel and ZG4Cr25Ni13 steel and so on. In recent years, Chinese technicians have also carried out some research and experiments on the problem of reducing nickel content, especially using my countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44
Inventor 张光华
Owner 张光华
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