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Production method for chromium-nickel alloy

A production method, chromium-nickel alloy technology, applied in the field of metal material alloys, can solve problems such as titanium hydrogen-induced damage, fracture, and increased project investment, and achieve the effects of improved cost performance, expanded application, and low corrosion rate

Inactive Publication Date: 2014-05-21
丹阳市锦雄机械制造有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

As a result of this, on the one hand, the project investment has been increased, and other problems will also appear in certain occasions, such as hydrogen-induced damage and fracture of titanium under cathodic protection conditions.

Method used

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Embodiment Construction

[0008] A chromium-nickel alloy, the components are, by weight, 5% of chromium, 6% of nickel, 2% of iron, and the impurity content is not more than 0.3%. The process of making the pipe is as follows: Firstly, through the alloy design, the ingredients are proportioned according to the above components, and after horizontal continuous casting, a pipe with an outer diameter of 55 mm and a thickness of 15 mm is prepared. After homogenization heat treatment at 750 ° C for 8 hours, the outer skin is obtained The pipe blank with a diameter of 50mm and a thickness of 12mm is stretched, and it is softened and stretched by 2 intermediate annealing processes. 5mm, and finally cut and packed into finished products. The material has the characteristics of good corrosion resistance and good tensile strength. The tensile strength is ≥850MPa, the yield strength is ≥500MPa, the elongation is ≥50%, and the reduction of area is ≥60%.

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Abstract

The invention relates to a production method for a chromium-nickel alloy. The method comprises the steps of: firstly conducting burdening according to alloy components and proportion through alloy design, carrying out horizontal continuous casting, preparing a tube blank, performing homogenizing heat treatment, shelling, repeated stretching and intermediate annealing softening, then conducting finished product stretching, and finally carrying out cutting and packaging, thus obtaining the finished product. The alloy material mainly comprises the chemical components of: 36-45 of Cr, 66-75 of Ni, less than or equal to 0.035 of Fe, less than or equal to 0.035 of Cu, less than or equal to 0.08 of Mn and the like, and Ni is taken as the main element. The tube adopting the chromium-nickel alloy has higher seawater corrosion resistance and lower corrosion rate, thus reducing the material cost, enhancing the cost performance, and enlarging application of chromium-nickel alloy in the fields of condensation tubes and heat exchange tubes.

Description

technical field [0001] The invention relates to a production method of chromium-nickel alloy, which belongs to the technical field of metal material alloys. Background technique [0002] The chromium-nickel alloy is characterized by adding copper elements on the basis of high chromium and nickel to improve the crevice corrosion resistance of steel. It is suitable for medium conditions such as hot sea water and salt brine. It has high strength, good plasticity and formability, and has Excellent localized corrosion performance, it is a material resistant to localized corrosion by neutral chlorides. [0003] Chromium-nickel alloys are famous for their resistance to seawater corrosion. Under certain conditions, the second phase precipitates in the grains or grain boundaries of the alloy, which significantly affects the mechanical properties of copper-chromium-nickel alloys, and at the same time has a great impact on the corrosion resistance of the material. Impact. When using ...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22F1/10
Inventor 荆泽平
Owner 丹阳市锦雄机械制造有限公司
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