Shandong Laiduan Machinery Co.,ltd
Add：ZHAILI, LAIWU CITY-SHANDONG PROVINCE – CHINA
Centrifugal Ductile Iron Pipe is one of the most widely used steels in mechanical manufacturing. After the treatment, it has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity. Steel hardenability is good, water quenching can be quenched to Sinder 28, oil quenching can be quenched to 15 40mm. This kind of steel is suitable for cyanide and high-frequency quenching in addition to tempering treatment. The cutting performance is good, when the hardness is Hb174, the relative cutting machinability is 60%. The steel is suitable for making medium plastic moulds.
Polishing is generally carried out on a polished basis to further remove the surface of the machined centrifugal ductile iron pipe, so that it has a mirror-like luster, which can be used for the preparation of centrifugal ductile iron pipes before plating, but also for finishing after plating.
Unlike polishing, there is no significant metal loss. The general view on the mechanism of the polishing process of centrifugal ductile iron pipe is: in the high-speed rotation of the cloth wheel and metal friction to produce high temperature, so that the metal surface plastic deformation so that the formation of the metal surface of the concave and convex, at the same time, the metal surface in the ambient atmosphere under the oxidation of an instant formation of the thin oxide film repeatedly polished down, and make its light Therefore, the polishing process has both the mechanical cutting effect and the physical and chemical functions.
The biggest problem in the polishing of centrifugal ductile iron pipe is that it occupies a large amount of labor, labor intensity, and the consumption of power and materials, so as far as possible in the production of bright electroplating technology, directly from the electrolytic trough to obtain the surface of bright coating, to reduce or even avoid the heavy load of polishing after the plating, but also the use of electro-polishing technology to replace part of the workpiece mechanical polishing; In addition, the use of polishing automation and small workpiece rolling to reduce manual labor.
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