Dali, Nanhai, Foshan Jincheng Hardware Machinery Factory, founded in 1986, is a professional design, manufacture non-ferrous metal and black metal pipe, rod, row, and wire production line equipment manufacturers, the main products are hydraulic sawing machine, straightening machine, pull drawing machine, chickened machines. Citation has been formed from rough casting, continuous casting and rolling, cutting, sawing, drawing, straightening, polishing until the finished series production line equipment, and according to customer's production requirements, design concepts for the customer design, manufacture, fit customer needs设备.
a. Process Overview
Hot-rolled (extrusion Seamless): Round Tube → heating → hole → three-roll cross rolling, rolling, or extrusion → → set off pipe diameter (or less diameter) → cooling → billet tube straightening → pressure → test (or testing) → mark → storage.
Cold drawn (rolled) Seamless Steel Tube: Round Tube → heating → hole → Heading → annealing → pickling → Tu oil (copper) → multi-pass cold drawn (cold) → billet tube straightening → → heat treatment → water pressure test (testing) → mark → storage.
b. seamless steel tubes, because of their different purposes are divided into a number of species are as follows:
GB/T8162-1999 (Structural Seamless Steel Tube). Mainly used in the general structure and mechanical structure. His representative material (grade): carbon steel 20,45 # steel; steel Q345, 20Cr, 40Cr, 20CrMo ,30-35CrMo, 42CrMo so.
GB/T8163-1999 (transmission fluid with the seamless pipe). Mainly used in engineering and large-scale equipment on the transmission fluid pipes. Representative material (grade) for 20, Q345 and so on.
GB3087-1999 (low and medium pressure boiler seamless steel tubes). Mainly used in industrial boilers and domestic transport low and medium pressure boiler pipe fluid. Representati This article from: Drawing Machine Net |
