A tungsten-based crucible is one of the items made of tungsten metal. The melting point of tungsten can reach 3410. This allows the w crucible to be split into spinning, stamping, forging, and sintering based on the manufacturing procedure.

Spinning Tungsten Crucible

It is the tungsten crucible that is produced by spinning forming. To prepare tungsten Crucible, the method of spinning forming may involve flow spinning or conical pieces that spin at shear.

Then, tungsten billets were made using powder metal. After that, thin sheets of a specified thickness were rolled by hot rolling. The sheets were cut into small circular pieces which were placed on the hot spinner. The tungsten sheet remains in close to the mold during the day of. After spinning many times the tungsten plate transformed into an Crucible. The thickness of the tungsten wall was thinner and more tightly adhered to the mold. After cooling the spinning tungsten crucible was achieved.

During spinning in the spinning process, compressed air and hydrogen are combined with the flame for heating. The temperature of heating is around 1000?, and each pass's wall thickness is about 0.5mm. If the rate of processing is greater than 50 percent, 70%, or 1000, it is considered as a 1100. hydrogen insulation for 1h annealing treatment is generally adopted to eliminate internal stress and increase plasticity, in order to further spin.

Stamping Tungsten Crucible

It is a tungstencrucible that is made by stamping. This method has numerous advantages, such as a good quality of the surface and an excellent utilization rate.

It consists of three steps that include drawing, blanking and bent.

1. Blanking is the process of the process of separating materials. It includes cutting, blanking , and punching.

2. The process of bending is one which uses pressure to cause plastic deformation of material so that it is bent to form a shape that has a specific curvature as well as a specific angle.

3. Deep drawing is a process of stamping that involves the use of flat wool process components are transformed into hollow parts, or the hollow parts are further changed in shape and size. Deep drawing creates hollow parts through the flow of material through the die. This happens outside of the bottom of the die.

Tungsten Crucible Forging

It refers to the tungsten crucible prepared using the forging method, which mainly includes three steps : blank preparation, forging and cutting. Its density is typically over 19.0g/cm3 and is close to reaching the theoretical density, and its diameter is usually smaller than 100mm.

Crucibles made of tungsten are forging and have better tensile strength over other techniques.

The production process of the forging of tungsten crucibles:

1. The requirements of small crucibles will require that the size and mass for the tungsten rod must be determined. The relative densities of the blank are typically 90% - 95%..

2. The tungsten bar that was prepared was heated up to the blank's opening temperature (1400 or 1600?) After heating the prepared bar of tungsten in the hydrogen furnace for a period of time before the blank was formed. The blank was heated again and forged again. After multiple forgings, when the total deformation of the billet is 50% to 60 percent, and the dimensions of the billet are in line to the design, the forging process is completed.

3. The billet that is forged should be annealed and then processed in accordance with the final dimension.

It is an isostatic pressure-sintering crucible steel. Isostatic pressure-sintering consists of a mix of raw materials as well as powder loading and high temperature pressing. It also involves the processing of cars and inspection. This is among the main preparation techniques to produce tungsten crucible.