What causes the difference in thickness of stainless steel strip
- 2020-07-13-

1. The effect of temperature changes. The effect of temperature changes of metallurgical spare parts on the thickness fluctuation of stainless steel strips in rolling equipment is essentially the effect of temperature difference on thickness fluctuation. Temperature fluctuation is mainly caused by the thickness difference caused by the influence of metal deformation resistance and friction factor.

2. The effect of tension changes. Tension is to change the metal deformation resistance of the rolling equipment by affecting the stress state, thereby causing the thickness to be changed. Changes in the tension of metallurgical spare parts not only affect the thickness of the strip head and tail, but also affect the thickness of other parts. When the tension is too large, it will affect the thickness and even change the width. Therefore, in the hot tandem rolling process, the stable low tension of the micro loop is generally used, and the cold tandem rolling is rolled in the cold state, and the material processing Hardening makes the deformation resistance great.

Only by adjusting the roll gap of the rolling equipment to change the rolling force, it is difficult to obtain the required reduction rate, so it is necessary to use a larger inter-stand tension for rolling. Large tension is the main feature of cold rolling production. The role of metallurgical spare parts tension includes: reducing rolling force and reducing rolling energy consumption; preventing strip deviation; controlling strip shape and strip thickness. Analysis on the Causes of Thickness Difference of Cold Rolled Stainless Steel Strip

3. The impact of speed changes. The speed is mainly affected by the friction factor, deformation resistance, and bearing oil film thickness to change the rolling pressure and reduction.

4. The influence of roll gap changes. When stainless steel strip is rolled, the roll gap of the rolling equipment will be changed due to the thermal expansion of the rolling mill components, the wear of the roll gap and the offset of the roll, which directly affects the actual thickness change. The periodic change of the roll gap caused by the misalignment of the metallurgical spare rolls and bearings will cause high-frequency periodic thickness fluctuations in the case of high-speed rolling.

In addition to the above factors, the fluctuation of the thickness and mechanical properties of the incoming material is also caused by the change of the rolling pressure, which causes the thickness of the stainless steel strip to be changed.