Take 120mm-140mm Diameter Heat-Treated Rod Mill Steel Rod
Shandong Huamin Steel Ball Joint-stock Co., Ltd.- Materials：304
- Certification：ISO
- Applications：Oil
- Shape：Round
- Specifications：20
- Standard：Standard
Base Info
- Model NO.：20-150
- Specification：1000kg
- Trademark：huamin
- Origin：China
- HS Code：7326110000
- Production Capacity：100000ton,Year
Description
2. The two ends of the steel bar are tapered: the two ends of the steel bar are tapered for many reasons, mainly because the contact probability and contact area between the two ends of the steel bar in the rod mill are larger than the middle part, resulting in the effective grinding time of the two ends. Longer than the middle part, once there is a very obvious difference in the ratio between the two ends and the middle, we call this steel bar "failure", because it has no effective grinding effect in the mill. 
3. Broken rod: The reason is that the material is loose inside. For the problem of billets in steel mills, only extra-large steel mills can meet the technical requirements of internal tightness, especially those with a diameter of more than 70mm. Although most of the steel billets of steel mills can complete the shape, the compression ratio and hardenability are very low, that is, the structure is not tight. . In addition, the internal internal stress of the round steel is not relieved when it leaves the factory, and the broken rod is like an explosion-explosion, which starts from the inside. The principle of steel rod production in the steel factory is like blowing a balloon. Broken stick.
4. Bending bar: The main reason for bending the bar is that the hardness of the round steel is very low and relatively soft. When it is subjected to external forces such as impact force in the mill, it is easy to bend. Once a rod is bent, it will cause the parallel arrangement of the steel rods in the entire mill to be disrupted (the steel rods run in parallel in the mill, and the materials are ground into small particles or powder when they enter the gap in the middle). It will lead to the inefficiency of the mill after the steel bars are out of order, and in severe cases, the steel bars will be thrown out of the mill, threatening the safety of workers and damaging the mill and other production equipment.
5. The production efficiency is low, and the qualified products cannot meet the requirements. This problem has plagued many companies for many reasons, and steel bars have a great impact on it. For example, the ratio of steel bars of various diameters is unreasonable, the filling amount is unreasonable, the supplement of steel bars is unreasonable, and the failed steel bars are not removed in time, etc. The most suitable products should be selected according to the above problems.