source：http://en.zzdsyc.com/news370416.html │ Publication time：2019-4-16 9:20:00
risers with different supply functions have different forms, sizes and locations. Therefore, the design of risers should consider the properties of casting alloys and the characteristics of castings. For alloys with small volume shrinkage during solidification (such as gray cast iron) or alloys without centralized shrinkage holes (such as tin bronze), the main function of risers is to discharge the gas in the cavity and collect metal liquids mixed with inclusions or oxide film at the front of liquid flow to reduce the defects on castings. For castings requiring control of microstructures, the riser can collect the cooled metal liquid at the front of the liquid flow to avoid supercooled structure on the castings. Fig. 2 is a single cast piston ring. A small riser is set on the opposite side of the inner gate to collect cold metal, and there will be no white structure due to supercooling of the metal, leading to the scrap of the castings. The size and location of the riser type in Zhengzhou and the main function of the riser heater in Zhengzhou should be determined according to the requirement of the microstructure of the castings.
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Zhengzhou deoxidizer manufacturer said that as a new material for food preservation, the deoxidizer has its unique advantages. It is packed in the same container with food, and the deoxidizer absorbs oxygen in the container to make the container anaerobic. Food can be preserved. But the raw materials of deoxidizer must have stable reaction. No side effects such as odor and harmful gas formation. In case of eating by mistake, it is harmless to human body. Generally, deoxidizer uses iron powder as basic material in general food, which can maintain food quality and prolong shelf life. It can prevent oil oxidation, fade and maintain nutrients in healthy food.Through the introduction of this article, I believe that you have a certain understanding of "the main role of Zhengzhou riser heating agent". If you want to know, composite Deoxidizer manufacturers, Zhengzhou Dongsheng Metallurgical New Materials Co., Ltd. and other related knowledge, please contact us! Eight hundred and eighty-eight thousand one hundred and eleven