Bowl-shaped tungsten crucible

Abstract

Bowl-shaped tungsten crucible, including a bowl-shaped crucible body and a loading frame inside the crucible body. The loading frame is divided into a supporting part located on the circumference and a loading part located in the middle. The supporting part and the loading part are integrated. structure, the supporting part is built on the upper edge of the crucible body, the edge of the supporting part is bent downward and is located outside the crucible body, the loading part is in a bowl-shaped structure and is located in the crucible body, and the bottom surface of the loading part is separated from the bottom surface with a blanking hole. There are ventilation holes spaced apart on the side of the part. The invention has the advantages of simple structure, stable operation, long service life, high production efficiency and convenient maintenance and replacement.

Description

technical field [0001] The invention belongs to the technical field of crucibles, in particular to a bowl-shaped tungsten crucible. Background technique [0002] Tungsten crucible is one of metal tungsten products. Because of its high melting point and boiling point, good high temperature strength, wear resistance and corrosion resistance, high thermal conductivity, small thermal expansion coefficient and good hardenability, tungsten crucible is widely used in rare earth smelting, quartz glass, In industries such as electronic spraying and crystal growth, the working temperature environment used is generally above 2000°C. Most of the existing tungsten crucibles have a barrel-shaped structure. In actual use, the raw materials to be melted are often put directly into the tungsten crucible, and then put into a high-temperature furnace for metallurgical melting. The raw materials are directly stacked in the tungsten crucible and The inner wall of the tungsten crucible is in dir...

AI Technical Summary

Problems solved by technology

Most of the existing tungsten crucibles have a barrel-shaped structure. In actual use, the raw materials to be melted are often put directly into the tungsten crucible, and then put into a high-temperature furnace for metallurgical melting. The raw materials are directly stacked in the tungsten crucible and The inner wall of the tungsten crucible is in direct contact, and the bottom of the tungsten crucible directly bears the weight of the raw material. In a high-temperature environment, long-term use will cause the bottom of the tungsten crucible to break. Since the tungsten crucible is of an integrated structure, the entire tungsten crucible will be unusable. , and the raw materials are directly stacked in the tungsten crucible, the uneven temperature distribution will cause different thermal stresses in each part of the tungsten crucible, which will easily cause large local deformation and reduce the service life of the tungsten crucible

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