Corrosion-resistant composite section bar and preparation method thereof

A composite profile, corrosion-resistant technology, applied in the direction of building components, etc., can solve problems such as unsatisfactory corrosion resistance, achieve the effect of improving service quality and operating life, reducing infrastructure and engineering costs

Active Publication Date: 2015-02-04
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the current corrosion-resistant materials cannot meet the requirements for corrosion resistance of materials when the corrosion environment is harsher or longer corrosion resistance life is required.

Method used

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  • Corrosion-resistant composite section bar and preparation method thereof
  • Corrosion-resistant composite section bar and preparation method thereof
  • Corrosion-resistant composite section bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Q235B continuous casting billet (160mm×160mm) and 304 stainless steel plate (thickness 12mm) were selected as internal material and external cladding respectively. Cut the 304 stainless steel plate into a width of 640mm, bend it and carry out degreasing pickling and activation treatment. Then, follow Figure 1A The 304 stainless steel plate is combined with the Q235B continuous casting billet, and then the 304 stainless steel welding material is used for TIG welding. The two ends of the composite billet along the length direction are made of image 3 Closed by manual arc welding. The composite billet is heated to 1120°C, kept at a temperature of 4 hours, and rolled on a bar and wire continuous rolling line. Before 120mm, it is box-shaped hole rolling, and after that, it is ellipse-circle-ellipse hole rolling. The diameter of the finished product is 20mm, and a 304 stainless steel rod composite steel rod is obtained. A batch of 304 stainless steel composite steel rods ...

Embodiment 2

[0060] Except for selecting Q235B continuous casting billet (160mm×160mm) and 316L stainless steel plate (thickness 6mm) as the inner material and outer cladding layer, the remaining steps were the same as in Example 1 to obtain 316L stainless steel rod composite profiles. After inspection, the average thickness of the stainless steel cladding is 0.65mm, and the minimum thickness is 0.5mm.

Embodiment 3

[0070] 15MnVN low-alloy steel continuous casting rectangular billet (220mm×180mm) and 202 stainless steel plate (thickness 6mm) were selected as the inner material and outer cladding respectively. The stainless steel plates are cut into widths of 220mm and 180mm respectively, and after cleaning, Ni-Cr alloy is thermally sprayed on the surface to be compounded. The weight ratio of Ni to Cr alloy is 1:2, and the coating thickness is 0.1mm-0.15mm. according to Figure 1B 304 stainless steel welding consumables are used for TIG welding after splicing, and both ends are Figure 4 Disc soldering package in a way. The heating temperature is 1250°C, and the temperature is kept for 4 hours. The universal rolling mill is used to roll into H-shaped steel. The finished size of H-shaped steel is 582×510×30×25 (unit: mm), and air-cooled after rolling. After inspection, the stainless steel cladding at the flange and web position of the H-shaped steel cross section is 0.8 mm to 1.6 mm, and ...

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Abstract

The invention discloses a corrosion-resistant composite section bar and a preparation method thereof. The corrosion-resistant composite section bar consists of an internal material, an external cladding layer and a chemical transition region, wherein the external cladding layer is attached to the internal material; the chemical transition region is sandwiched between the internal material and the external cladding layer; the internal material is a carbon steel material, a low alloy steel material or a micro alloy steel material; the external cladding layer is a stainless steel cladding layer; the chemical transition region is an element diffusion transition region between the internal material and the external cladding layer. According to the corrosion-resistant composite section bar, the manufacturing cost is low, the process is simple, and important social benefit and economic benefit are realized in development of low carbon and green economy.

Description

technical field [0001] The invention relates to a composite profile, in particular to a composite profile resistant to corrosion by air, soil or other media and a preparation method thereof. Background technique [0002] Corrosion is one of the common failure modes of metal materials during service. According to statistics, the metal scrapped due to corrosion all over the world reaches more than 300 million tons every year, accounting for 20% of the annual output. The annual economic losses caused by corrosion in developed countries account for about 2%-4% of their gross national product, among which, the United States consumes 3.4% more energy due to corrosion each year. In our country, the economic loss caused by corrosion is at least over 100 billion yuan every year. [0003] For iron and steel materials, although it is still the structural material with the largest output in the world due to its high specific strength, good comprehensive performance and relatively low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16S5/00B21C37/00
Inventor 苏航闫爱军杨忠民潘涛柴锋
Owner CENT IRON & STEEL RES INST
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