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The forming method and shrinkage analysis of the water pump copper pipe casting
- Nov 07, 2017 -

The water pump copper pipe casting can be welded in the production process. In general, there will be copper brazing, silver brazing welding, brass argon arc welding wire welding and so on. When using copper solder, you need to use the soldering flux. If the argon arc welding is selected, the argon arc welding wire will be used.

The forming method of the water pump copper pipe casting

One is cast molding and the other is abrasive tool moulding. The one which is different to mold through abrasive tool moulding can be cast molding, such as large workpiece.

The shrinkage analysis of the water pump copper pipe casting

In the case of the same carbon equivalent, the increase of  Si/ C ratio will increase the formation tendency of ferrite. However, for the small castings such as the submersible pump castings, the Si/ C ratio increases, the tendency of ferrite appears in the tissue is not large, so it will not affect its strength.

1.The linear shrinkage of the water pump copper pipe casting refers to the higher the temperature formed by the solid skeleton of the metal liquid, the earlier the line shrinkage and the longer the shrinkage of the product will be. So the value of the linear shrinkage will become larger, in the same carbon equivalent, the increase of  Si/ C ratio  will increase the number of primary austenite, and the solid skeleton will be formed earlier, thereby increasing the linear shrinkage.

2.The volume contraction of the water pump copper pipe casting mainly refers to the low carbon content in the traditional process of cast iron and high Si/ C ratio ratio cast iron, but the carbon equivalent is slightly higher, so there is no obvious difference in the volume shrinkage of this cast iron. This feature has also been verified in production.


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