The manufacturing process of S355JR steel plate usually includes hot rolling and cold rolling. The hot rolling process is to continuously roll the heated billet into the required thickness and shape through the roller table, while the cold rolling process is to process the steel into the required size and shape at room temperature.
S355JR is a commonly used structural steel material, and its hot rolling process generally includes the following:
1. Raw material preparation: select steel billets that meet the standard requirements, and carry out quality inspection and surface cleaning treatment.
2. Preheating: heating the billet to a suitable temperature for the next rolling operation.
3. Rough rolling: the preheated billet is preliminarily rolled through the rough rolling unit to form a preliminary plate shape.
4. Intermediate rolling: the pre-rolled steel slab is further rolled in the intermediate rolling unit to form a flatter plate shape.
5. Finish rolling: The steel billets that have been rolled in the middle are finely rolled in the finish rolling unit to achieve the required size and surface quality.
6. Cooling: Rapid cooling of the rolled S355JR steel plate to solidify its structure and increase hardness.
7. Quenching and tempering treatment: According to different application scenarios and strength requirements, S355JR steel plate is subjected to quenching and tempering treatment to change its structure and performance.
8. Cutting: Cut the S355JR steel plate into the required size and length according to customer needs and standard size requirements.
S355JR steel plate is widely used in construction, bridge, machinery manufacturing and other fields. It has excellent strength, toughness and corrosion resistance, and is a commonly used structural steel material. In the field of construction, S355JR steel plates can be used to manufacture steel structure houses, bridges, towers, etc.; in the field of machinery manufacturing, S355JR steel plates can be used to manufacture various mechanical parts, bearings, etc.
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