Kunshan Brave Tech Co.,Ltd.
KUNSHAN BRAVE TECH CO.,LTD.
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Cold Rolled Steel Hot Rolled Steel Slitting Machine Cut To Length Production Line
The slitting machine is also called vertical slitting line which are used to slit cold rolled steel coil,hot rolled steel coil,galvanized steel coil,silicone steel coil,stainless steel coil,aluminum coils etc into different width according to the user’s production demands and cut as well The smaller metal strips are recoiled at the end of the slitting machine by which these smaller strips are used necessarily for the next process usage in the professional field of making transformers,motors making industry,tube/pipe welding mill industry,Cold roll forming industry, ceiling drywall industry and other high-precison equipment making and metal strips making industries. According to the material slitting thickness there are thin plate or board slitting machine,media-thickness plate or board slitting machine and thick plate or board slitting machine. According to the metal materials there are copper strips slitting machine,stainless steel slitting machine,cold or hot rolled plate slitting machine,silicone steel slitting machine.
Hot rolled Steel
This product is typically used for cold rolling and among the hot rolled products has the lowest strength. It has wide applications ranging from regular machining to drawing and ironing. It is also used in a variety of cold rolled products including CR, GI, EG and color plates.
Cold rolled steel
Cold rolled steel is essentially hot rolled steel that has had further processing. The steel is processed further in cold reduction mills, where the material is cooled (at room temperature) followed by annealing and/or tempers rolling. This process will produce steel with closer dimensional tolerances and a wider range of surface finishes. The term Cold Rolled is mistakenly used on all products, when actually the product name refers to the rolling of flat rolled sheet and coil products
Manufacturing process:
Hot rolling: the material needs to be heated during or before rolling. Generally, it is heated to above the recrystallization temperature before rolling. Features of hot-rolled products: Hot-rolled products have excellent properties such as high strength, good toughness, easy processing and forming, and good weldability, so they are widely used in manufacturing industries such as ships, automobiles, bridges, construction, machinery, and pressure vessels.
The rolling process flow of the rolling mill is divided into two steps: hot rolling and cold rolling. The process flow is:
1. Hot rolling process: The billets from the steel mill are only semi-finished products and must be rolled in the steel mill before they can become qualified products.
The continuous casting slab sent from the steelmaking plant first enters the heating furnace, and then passes through the blooming mill repeatedly after rolling, and then enters the finishing rolling mill. Rolled steel belongs to metal pressure processing. Rolled steel plate is like pressed noodles. After multiple squeezing and pushing of a rolling pin, the noodles become thinner and thinner. In the hot rolling production line, the billet is heated to soften, and is sent to the rolling mill by the roller table, and finally rolled to the size required by the user. Steel rolling is a continuous and uninterrupted operation. The steel belt runs fast on the roller table, the equipment is highly automated, and the efficiency is high. Steel ingots from the open hearth can also become steel plates.
After heating and blooming, the billet can be sent to the hot rolling line for rolling. Generally, the thickness of the continuous casting billet is 150～250mm. It consists of a 4-roll mill, with a speed measuring roll and flying shears installed in front of the mill to cut off the head of the plate surface. The hot-rolled products are divided into two types: steel coil and ingot plate. The thickness of the hot-rolled steel rail is generally a few millimeters. If the user requires the steel plate to be thinner, it must be cold-rolled.
Second cold rolling process: Compared with hot rolling, the processing lines of cold rolling plants are more scattered. The cold rolled products mainly include ordinary cold rolled sheets, coated sheets, namely tinned sheets, galvanized sheets and color coated sheets.
The steel coils sent through the hot rolling mill must first undergo three consecutive technical treatments. The oxide film must be removed with hydrochloric acid before being sent to the cold rolling mill. On the cold rolling mill, the decoiler opens the steel coil, and then the steel strip is introduced into the five-stand continuous rolling mill to be rolled into a thin strip. From the five racks, there are also ordinary steel strip coils of different specifications, which are processed according to the various requirements of users, so as to produce a variety of different quality products.
