Gi Coil 0.16mm 0.20mm Gi Hot Rolled 55% Galvalume Steel Coil
It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously dipped in the melting zinc bath to make galvanized steel plate; Alloyed galvanized steel plate. This steel plate is also made by hot dipping, but immediately after it is out of the groove, it is heated to about 500℃ to create an alloy coating of zinc and iron. This galvanized coil has good coating tightness and weldability.
|Length||2000 mm-12000 mm|
|Width||600mm to 1500mm|
|Thickness||0.125mm to 3.5mm|
|Crade||JIS G3302, JIS G3313, GB/T2518-88, GB11253-89 ASTM A1008-2000, EN10169 elc|
|Standard||ISO, JISAS, EN.ASTM|
Galvanized coil products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries.
The construction industry is mainly used for the manufacture of anti-corrosion industrial and civil building roof panels, roof grids, etc.
Light industry uses it to make home appliance casings, civilian chimneys, kitchen utensils, etc.
The automobile industry is mainly used to manufacture corrosion-resistant parts of cars.
Agriculture, animal husbandry and fishery are mainly used as food storage and transportation, meat and aquatic products frozen processing equipment.
Commercial mainly used as material storage and transportation, packaging tools, etc.
Mainly according to the sequence of uncoiling production and processing → welding → pretreatment → inlet looper → annealing in heating furnace → zinc pot → air knife → water quenching → finish → stretching straightening → bending.
Open volume: raw material volume. Unroll the sheet to provide the strip needed for continuous operation.
Welding: The end of the front steel strip is welded together with the end steel head.
Pretreatment: Clean the grease on the surface of the steel strip. Excellent adhesion and surface quality were obtained.
Generally need spraying, brushing, electrolytic cleaning, brushing, spraying, extrusion, hot air drying and other equipment for cleaning. Therefore, pretreatment is the critical stage.
Inlet looper: mainly used for storage of steel tape to ensure continuous operation of production line.
Annealing in heating furnace: recrystallization annealing is carried out on the rolled hard strip steel to obtain excellent mechanical properties. By controlling the temperature in the furnace, excellent properties of strip coating can be obtained. Annealing furnace is generally composed of preheating, heating, soaking heat and cooling. The temperature is controlled between 500 ° C and 800 ° C. The protective gas is a mixture of NH from decomposition of NH3, H2 is used for combustion and reduction, and N2 is a maintenance inert gas.
Zinc pan: Tool for galvanizing.
Air knife: The role of the air knife is to wipe the zinc off the outlet steel belt of the zinc pot and control the thickness of the zinc layer according to the zinc layer control system.
Water quenching: Cooling steel plate. Finishing: improve the surface finish of galvanized sheet. After leveling, it can improve the flatness of galvanized sheet to a certain extent, partly remove the wavy shape of galvanized sheet, and smooth the surface of slag particles or other uneven points, so that the surface is more and more smooth.
Tension correction: correction of steel plate shape.
Winding: To roll up raw materials by mechanical equipment.
Finally, galvanized steel coil products from this.