Ductile iron pipe sand holes

by:XEX     2020-12-10
Ductile iron pipes it is combined with magnesium and rare earth magnesium golden, agents to join before pouring molten iron, the graphite spheroidizing, reduce stress concentration, the pipe material has high strength, elongation and impact resistance, corrosion resistance, good sealing, etc; Use cement mortar lining, improve the water environment, improve the ability of water supply pipeline, reduce the energy consumption; Nozzle using the flexible interface, and the pipe itself has a larger elongation, better make of flexible pipe, in buried pipeline and soil around the pipeline work, improve the stress of pipeline, so as to improve the reliability of the network operation. Therefore, at present our country director of ductile pipe water supply industry is usually used as the material. People commonly use the adoption of besmear brushs paint you will be presented with the casting sand inclusion, sand holes. Because of gate besmear brushs paint more hard and difficult. 2 is in the process of casting high pouring temperature, erosion, coating in the scour and under high temperature and soaked it is easy to fall off. Caused the sand inclusion sand holes. Has been a lot of casting factory attaches great importance to runner. Neglect of sprue in the process of casting wall. Thus caused the nodular cast iron pipe casting sand sand holes. So in order to improve casting yield, improve castings quality, reduce the total cost of castings. Using the casting gate earthenware pipe, the product easy to use, has a smooth flow, resistance to molten iron, molten steel scouring, no absorption of liquid steel, can be saw is good wait for a characteristic, can simplify the modeling process, eliminating gate on the inside of the hard work of paint, and to improve the pouring system arrangement, avoid the casting sand washing, sand holes, sand defects. This is the best way, everyone can use it. The use of nodular cast iron pipe due to its environment, appear corrosion phenomenon is inevitable, therefore, requires us to understand how to deal with ductile pipe sand holes phenomenon.
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