Bimetal wear-resistant composite pipe is made of advanced vacuum casting process, the polystyrene foam made into the inner village model into the steel, coating, drying, modeling, in the vacuum state pouring high chromium wear-resistant alloy, made of the outer steel pipe, the inner layer of wear-resistant material composite pipe. The company introduces the domestic advanced vacuum casting production line, realizes the mechanization and automation of the production process, has its own patents, laser technology, stable process and reliable quality.
bimetal wear-resistant composite pipe features:
1. Good comprehensive performance
The outer layer of the composite tube is made of ordinary steel pipe, and the inner liner is made of high chromium wear-resistant alloy, forming a good metallurgical combination, giving full play to the wear resistance and corrosion resistance of high chromium alloy and the good mechanical strength and impact resistance of ordinary steel pipe, solving the contradiction between the solderability and wear resistance of a single material that is difficult to reconcile, so that the properties of the two materials can achieve the best combination.
2, high wear resistance
The wear layer is high chromium alloy material, the macro hardness can reach HRC55 or more, the structure contains a lot of Cr-Ni-Mo-Cu-RE type hard carbide, its micro hardness HV1500-1800, and the wear resistance of the wear material is significant. The product has the wear resistance and corrosion resistance of high alloy cast iron (wear resistance and corrosion resistance are more than 30 times higher than 16Mn seamless steel pipe).
3, living layer corrosion, high temperature resistance
Because the matrix is mainly composed of austenite and carbide, there is a large amount of Cr element in the cyclic solution, so it can also show good performance in corrosion or high temperature environment.
4, composite technology advanced, stable
The advanced vacuum casting process of the lost mold can reach the level of semi-precision casting, and the dimensional accuracy and roughness are two higher than that of sand casting, preventing the casting defects such as sand inclusion and porosity, and the surface quality is good. The composite process is the first of its kind in China, which fills the gap of the anti-corrosion and anti-wear industrial transmission pipeline, solves the technical problem that the playing head can not be integrated composite, and reaches the international advanced level.
5, the pipeline running resistance is small, beautiful appearance
The overall composite of the grinding layer is realized, which prevents the phenomenon of dead Angle in the waist type elbow, does not change the movement path of the material, has little resistance and less energy consumption; The eccentric thickening compound can be carried out according to the requirements of working conditions to achieve the optimal design of equal life, and the economic benefits are remarkable.
6. Good thermal shock resistance
The thermal expansion coefficient of the two layers of metal material inside and outside the composite pipe is equivalent, and when there is a sharp change in temperature or welding, it will not lead to fragmentation and spalling due to inconsistent thermal expansion and cold contraction, resulting in early failure.
7, transportation, installation, easy to use
The composite pipe can be connected and installed by flanges, quick joints, welding, etc., and can be cut and disassembled at will, convenient installation and maintenance, and can also withstand appropriate knocking, wrong hitting, collision, transportation without special packaging.
bimetal wear-resistant tube performance and chemical composition:
Chemical composition of high chromium alloy wear layer:
| element | C | Si | Mn | Cr | P | S | others |
| Content （%） | 1.1~1.4 | <1.0 | <2.0 | 15~30 | < 0.1 | <0.06 | appropriate amount |
Composite pipe mechanical properties:
| Flexural strength 6s(MN/m²) | strength of extension 6b(MN/㎡²) | impact toughness ak(J/c㎡ ) | Hardness of wear layer HRC | Still water tests the pressure MPα |
| >610 | >415 | >15 | >55 | 5.6-12.9 |
The application of bimetal wear-resistant tube:
Because the pipe has high wear resistance, corrosion resistance and heat resistance, it can be widely used in electric power, metallurgy, mining coal, chemical and other industries as a transport of sand, stone, pulverized coal, slag, liquid aluminum and other abrasive granular materials and corrosive media, is an ideal abrasion-resistant pipeline.
1. Application in metallurgy and electric power industry
Metallurgy, electric power industry transport coal powder, slag, mud, etc., need to consume a large number of metal pipes every year. The ceramic composite pipe is used to replace other pipes, which has the characteristics of high wear resistance, long life, easy installation and remarkable economic benefit. After Jinchuan Nonferrous Metals Corporation, Panzhihua Iron and Steel Company, Tanggang Mining Company, Angang Mining Company, power plants, Shandong Liaocheng Power Plant, Shanxi Yangcheng Power plant, Guizhou Anshun Power plant, Huaneng Chongqing Luohuang Power Plant, Xibaipo Power Plant and other industrial operation, its operating life of steel pipe more than ten times or even dozens of times more.
2. Application in mining and coal industry.
(1) Mine: mining carbon filling, fine ore powder and tailings transport on the pipeline wear is serious, the past use of mineral powder transport pipeline such as Panzhihua, Daye mine and other service life is less than -years, use the pipe can increase the life of about 5 times.
(2) Coal: coal preparation and long-distance pipeline coal transport generally use wet transportation, requiring the transmission pipe both wear and corrosion resistance, the use of the pipe can be used as a long-life transmission pipe, considerable economic benefits.
3. Others
(1) The pipe does not pollute and does not stick to molten aluminum liquid. Aluminum melting equipment, aluminum liquid conveying pipes, and liquid riser pipes that are sensitive to iron pollution and require heavy labor to clean and maintain after use are currently ideal materials.
(2) The tube has good wear resistance and heat corrosion. It is suitable for conveying corrosive materials containing solid particles and corrosive media such as high temperature corrosive gases and sulfur-containing geothermal water.