Rolling of molybdenum plate
1. Hot rolling of molybdenum plate
Hot rolling is carried out on a rolling mill with a width of 650mm, and the intermediate annealing is carried out in a hydrogen protection furnace. As a result of the size of cold rolled product molybdenum plate is 0.4~0.5 * 700~800 * 2000~3000mm, it is necessary to increase the size specification of the hot rolled plate, through the experimental calculations, the choice of single weight 200/ block of molybdenum plate is more appropriate.
In order to roll out the suitable cold rolled molybdenum plate, two kinds of plans of hot rolling are adopted, respectively as one time commutation and two commutation rolling, the thickness of the rolled molybdenum plate is between 2.9~3.1mm, and the surface quality of the hot rolled plate is good.
2. Wide cold rolled molybdenum plate
The width of the 400~510mm molybdenum plate is carried out in the width of 550mm cold rolling mill, the width of 700~800mm molybdenum plate is carried out in the 1200mm four roller reversible cold rolling mill.
Because the specification of molybdenum plate ensure the size of corresponding finished product, reversing rolling must be adopted in cold rolling. According to previous experience, in the cold rolling process, the molybdenum plate is very easy to appear in the head from the skin, lamination and other processing defects, in order to ensure the smooth rolling process of wide molybdenum plate, we should reduce or overcome layered phenomenon as far as possible.