However, thisroughness does not interfere

However, thisroughness does not interfere with the performance by any means. For this, the melting point of the materialused to create the crucible must be more than the melting point of the metalthat in placed in the crucible.. There are straight sides that are bent outwards.” It is made of siliconcarbide and clay graphite. Some of the clay graphitecrucibles can be used up to 2750 degrees Fahrenheit. Some A shaped cruciblesare used up to 2000 degrees Fahrenheit.

The part of thecrucible in the middle region is called as a bilge. Due tothis scale, the molten metal is polluted. The thickness of the crucible wallsdecreases fast. For melting metals like aluminumand zinc, a steel crucible made at home can be used. The base of the crucible has lesser diameter than thetop. Both the above mentioned shapescan be manufactured in Clay graphite and silicon carbide. In addition, silicon carbideis a very durable material. In between the base of the furnace and thecrucible there must be a disk of cardboard or a coating of Plumbago. 

As per a thumb rule, the China Zinc die casting parts Suppliers of a bilge crucible is the number of pounds ofaluminum that it would hold. Also, the crucible material must have excellentstrength even in the white hot state. In correct tongs can lead to damage ortotal failure of the crucible. As it is simplerto manufacture this shape than the bilge one, the A shaped crucible has alesser cost. The A shaped crucibles have arough surface finish and there are dents along the rims. Properties of crucibles: A crucible must be able to bear the extremely hightemperatures of the molten metal. This is the widest part ofthe crucible and has the maximum diameter.

 Materials used: To construct a crucible, the usual refractory materials(i. In this case, theinterior surface of the steel crucible undergoes flaking or scaling. The use of steel crucibles is okay if the contaminationdue to the scales is not regarded serious. When compared with the equivalent bilge style, the capacity of theA shaped crucible is lesser. The reason is that themelting point of aluminum and steel is lesser than steel. This thumb rule is applicable for bilge shape only.For instance, a #5 bilge # crucible can hold almost 5 pounds of aluminum and 15pounds of brass. Shapes of crucibles: A bilge shaped crucible has the shape of a barrel.

The diameter continuously increases from the base to the top. An “A” shaped crucible has anarrow bottom and a wider top. carbon bonded silicon carbide and clay graphite) can survive theextremely high temperatures of work of a foundry. While handling crucibles,correctly fitting tongs must be used. For bronze and brass, thrice the # can be held. The top of the crucible has lesserdiameter than the bilge. Hence, a coating of marcote-7 is applied to the inner surfaceof the steel crucible. These crucibles can be used to handlegold, silver, bronze, brass, aluminum and zinc alloys.A pot in which metal is held,while melting in a furnace is called as a “Crucible