Cold pull -out seamless steel pipes: round tube blank → heating → perforation → head → annealing → pickled → oil (copper plating) → multiple cold pull -out (cold rolling) → blank pipe → heat treatment → straight → water pressure test (Detective) → mark → enter the warehouse.
The following is an overview of the two steel pipe process process:
The cold -pull steel pipe uses hot -rolled steel rolls as raw materials, and the cold rolling rolling rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled rolled hard rolled rolling. Plastic indicators are reduced, so stamping performance will deteriorate and can only be used for simple deformation parts. Rolling hard rolling can be used as a raw material for thermal galvanized factory, because the thermal galvanized units are equipped with annealing line. Rolling rolling rolling weight is generally 6 ~ 13.5 tons, and the inner diameter of the steel roll is 610mm.
Generally, the cold rolling plates and rolls should be continuously annealing (CAPL unit) or an annealing of the cover -type furnace to eliminate cold hardening and rolling stress to achieve the mechanical performance indicators specified in the corresponding standards.
The surface quality, appearance, and size accuracy of cold -rolled steel plates are better than hot -rolled plates, and the thickness of its product is thinner to about 0.18mm. Deep processing of the product with cold rolling steel rolls as a substrate has become a high value -added product. Such as electroplating, hot -dip galvanized, fingerprint -resistant electroplating, color coating steel plate rolls and vibration -reducing composite steel plates, PVC compound film steel plates, etc., these products have excellent quality such as beautiful, high anti -corrosion, etc., and have been widely used. Cold -rolled steel rolls must be refined after annealing, including cutting head, tail, cut edge, flat, flat, heavy roll, or longitudinal cutting plate. Cold -rolled products are widely used in automotive manufacturing, home appliance products, instrument switches, construction, office furniture and other industries. The weight of each package after the steel plate is 3 ~ 5 tons. Flying scores are generally 3 ~ 10 tons/volume. The inner diameter of the steel roll is 610mm.
