Brief Introduction of Manufacturing Technology of Self-Propagating Centrifugal Casting Wear-resistant Ceramic Steel Pipe
Wear-resistant ceramic steel pipes are made according to different classifications, and the production process is also different. It includes three layers: an outer steel pipe, an intermediate transition layer and an inner wear-resistant ceramic lining layer. Generally, the three are made separately, and then according to different categories and needs, use different types. method to compound it. Today, we will take centrifugal casting composite wear-resistant ceramic steel pipe as an example to talk about its basic manufacturing process.
Centrifugal casting composite wear-resistant ceramic steel pipe is based on aluminum heat reaction, and is manufactured by high-tech production process - self-propagating high-temperature clutch synthesis method, forming uniform, dense and smooth wear-resistant ceramic layer and transition layer at high temperature and high speed.
The ceramic layer is dense corundum porcelain (AL2O3) formed at a high temperature above 2200°C, and forms a firm bond with the steel pipe through the transition layer
Alumina ceramics (corundum) have very high hardness (HRA≥85), ranking fifth in nature after diamond, boron carbide, cubic boron nitride and silicon carbide, so they have high resistance to corrosion. Coal powder, ash, gas impact wear ability, and can be processed by turning, grinding and welding, it is a composite pipe with comprehensive excellent performance.
The centrifugal casting composite wear-resistant ceramic steel pipe manufactured by the self-propagating high-temperature clutch synthesis method is relatively simple in production process and low in cost, and is suitable for long-distance powder transportation. However, due to the limitations of the process itself, most of the straight tubes are straight tubes, and the expansion coefficients of alumina and iron are different in the aluminothermic reaction, resulting in porcelain frying and cracks during cooling, and ceramics often fall off during use. The thinness also leads to the heavy weight of the centrifugally cast composite wear-resistant ceramic steel pipe, and its wear resistance is worse than that of the patch wear-resistant ceramic pipe, so it needs to be considered comprehensively according to the situation when using it.
