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Spinning tungsten crucible means the tungsten crucible is produced by spinning process, with high purity above 99.95%, density of 18.5-19.0g/cm3 and outer diameter of 50-300mm. Spinning tungsten crucible has the characteristics of good quality, nice tensile strength, high hardness and high density, but it is difficult to operate as the hot rolling process and the spinning process are complex. Producing Process of Spinning Tungsten Crucible The tungsten sintered compact is prepared by powder metallurgy method, and is hot-rolled into thin…

Stamping tungsten crucible means the tungsten crucible that is produced by stamping process, which has the advantages of good surface quality, high dimensional accuracy, high material utilization, light weight, simple producing process, high production efficiency and low cost. However, the quality of this type of tungsten crucible is not stable. Producing Process of Stamping Tungsten Crucible 1. Blend the tungsten plate into a certain angle or bend the blended workpiece again. 2. Press it into any hollow shape by mould,…

Forging tungsten crucible is referred as to the tungsten crucible that is manufactured by forging process, which mainly consists of three steps – blank preparation, forging and machining. Its density is generally greater than 19.0g/cm3, which almost reaches the theoretical density. While its diameter is usually less than 100mm. The tensile strength and high temperature deformation resistance of tungsten crucible produced by forging method are better than that of tungsten crucible produced by other methods. Producing Process of Forging Tungsten…

Sintering tungsten crucible means the tungsten crucible is produced by isostatic pressing – sintering, which is one of the most important preparation technologies for manufacturing tungsten crucibles today. The isostatic pressing – sintering mainly includes processes such as powder mixing, powder loading, isostatic pressing, high temperature sintering, lathing, and finished product inspection. There are some main factors for the cracking of tungsten crucibles – powder mixing, pressing pressure, and the angle of fillet at the bottom of the core, the…

Tungsten crucible may be manufactured by the cold isostatic pressing – sintering method with the size of 301mm×350mm. The density and oxygen content of the samples collected from the wall and bottom of the tungsten crucible were analyzed to study the density uniformity of the tungsten crucible. The density of the crucible is 18.22 g/cm3. And it decreased about 0.1g/cm3 after machining. The density of the tungsten crucible bottom is relatively lower. The lowest density exists in the arc corner,…