Excluding factors such as usage, construction conditions, and rotational speed, comparing the materials of sand pump castings alone, which one is better? What are the materials of sand pump castings introduced below?
1. Chromium material, material code Cr27, is mainly used in the flow components of large particle sand pumps or slurry pumps, while also having the advantages of corrosion resistance and corrosion resistance. Compared to other materials of sand pump castings, it contains nickel element and does not contain molybdenum element.
2. The sand pump uses high chromium alloy flow components, mainly used in submersible sand pumps and vertical sand pumps. The material of the casting has a chromium content of 26, in addition to elements such as nickel, molybdenum, and copper, with high wear resistance and relatively high cost-effectiveness. It is suitable for high-speed sand pump models.
3. The sand pump and some slurry pumps use this material, with a chromium content of 28, as well as nickel and molybdenum, which have higher hardness and good tensile resistance. The application scope is very extensive.
4. The casting material used for sand pumps has stronger wear resistance and higher hardness compared to other sand pump materials. However, due to the low production and high price of molybdenum and nickel metals, the cost of castings is twice that of ordinary high chromium alloys, so the cost-effectiveness is not high.
In the selection of flow components for sand pumps, the wear resistance is mainly determined by the content of carbon elements. Then, trace elements such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc. are added to achieve strong wear resistance by changing the matrix of cast iron through a combination of ratios. In actual selection, different types of sand pumps and flow components can be selected based on the requirements of sand pumping volume.