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Contents

Fupresa teaching materials
When considering the qualification of professionals in the chemistry engineering, mechanical engeneering and process engeneering fields, Fupresa develops and deploy technical contents related to several different industrial processes aimed at industrial metalurgical parts. These documents are based on good industrial practices, academical knowledge of professionals with absolute market expertise and reputed professional performance.

Comparing

Casted versus forged steel

For a better understanding of the main differences between the processes of foundry and forgering, Fupresa has prepared a detailed techinical documentation.

Sintered parts protects

Limitations and Considerations

The first consideration to be made is that, steel parts originally projected to be produced by conventional metalurgical methods can rarely be produced by sintering without modifications.

In order to obtain maximum sintering process advantages (high dimensional precision and superficial finishing excellence) it's necessary to adequately project the modifications to be made to the part itself considering the limitations that the compression operation itself (fundamental process operation) poses.

The sintering techniques (powder metallurgy) works well with items which do not present considerable variationsin its transversal sections. Therefore, corners, and sharp edges, very thin walls, or any such particularity must be avoided, for the powder, under the effect of pressure, does not flow as liquid does, which prevents the adequate fulfilment of the recesses in the matrices cavities.

The product designer must bear in mind a series of rules which restrict the sintered parts project and must also consider the suplentary machining operation if the finished product so demands.

Such rules may be summarized as below:



COMPARATIVE BOARD

Process Mould
Cost
Part
Cost
Alloy
Option
Liberty
Design
Capacity
Volume
Conicity
Output
Tolerance
Control
Size
Range
Surface
Treatment
Wall
Thickness
Devolpment
Deadline
INVESTMENT MEDIUM HIGH MANY HIGH ANY NO THIN UP TO MEDIUM GOOD SMALL MEDIUM
FORGERY HIGH LOW FEW LOW HIGH YES THICK SMALL MEDIUM MEDIUM LONG
SINTERED HIGH MEDIUM SOME LOW HIGH NO THIN SMALL GREAT SMALL LONG
FOUNDRY WITH SAND LOW LOW MANY LOW ANY YES THICK ANY THICK MEDIUM SHORT