With the continuous development of science and technology, CT machines have higher and higher requirements for the flatness of tungsten alloy collimators, from less than 0.03 to within 0.015, which undoubtedly poses new challenges to the preparation of tungsten plates. Now there are several problems in the production process of traditional high-purity tungsten plates:
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One is the high requirements for equipment: in order to control the difference between the same plate, the traditional rolling mill needs to use a continuous multi-roll rolling machine; the other is that for pure tungsten foils with a thickness of less than 0.08mm, the quality of the products produced by the traditional process is poor, and it is difficult to It meets the requirements of CT machines; third, the rolling deformation of pure tungsten is about 35%, and excessive deformation can easily lead to defects such as delamination and peeling; fourth, multiple annealing is required when rolling with large deformation, which increases the furnace The number of times, the energy consumption is large, and the production cycle is long. Therefore, a new preparation method will be introduced below, which can produce high-flatness pure tungsten metal sheets.
The specific steps are as follows: Put the pure tungsten metal plate with a thickness of 0.1 to 0.4 mm into the preheated rolling mill for warm rolling. The feeding method is single sheet feeding, with a pressure of about 12 tons and a speed of 200~600r/min, rolling until deformation The amount is 30%; the rolled pure tungsten metal plate is equally divided along the length direction, and then stacked along the thickness direction; the subsequent warm rolling is carried out by double-layer stacked feeding method, and the pure tungsten metal plate is rolled on the rolling mill Rolled to a single sheet thickness to meet the thickness requirements. Note: the diameter of the working roll of the rolling milk machine is 40-100 mm, and the convexity of the working roll of the rolling milk machine is 0.01 to 0.1 mm.
The advantages of this production technology include reducing the number of intermediate annealings, simplifying the production process, reducing rolling pressure and rolling passes, effectively saving energy consumption, reducing production costs, shortening production cycles, and improving production efficiency.
Baoji Yusheng Metal Technology Co., Ltd. specializes in the production of high-purity tungsten carbide plates. The products have high hardness and strong wear resistance. We sell directly at factory prices and deliver on time. And our company supports non-standard custom-made tungsten products and accepts drawings to make custom-made tungsten products.
