what is a suitable steel grade for the 'trumpet' section of a clutch throwout bearing. Looks like a short velocity stack and presses into the bearing and acts on the pressure plate fingers. It is for a 1954 MG racing clutch.
Killed steel is as has been described earlier a steel which has had Al & or Si added to tie up the soluble oxygen so that the ingot or billet does not contain gross cavities. It was eloquently described to me as lowering the dissolved oxygen to a level where it will no longer react with the...
Class 60 gray iron might be a difficult animal to produce - class 50 is usually at the top end of the gray iron as cast range. Higher tensile strength gray irons need low carbon equivalent iron with supplementary alloying to reach the high tensile properties and these are prone to carbides...
Inoculation of ductile iron has rules of thumb. However the occurrance of carbides in castings can be a complex problem because so many factors can potentially be linked to the carbides. Analysis of the iron for example, does not guarantee the quality of the casting, it is merely one measure...
Testing a separate coupon (test bar) to the ductile iron casting has to be demonstrated to be equivalent to one of the key sections of the casting, since it will be either a keel block or y block or some diameter test bar.
The foundry has to make sure the test bar is as good as the casting or...
simple checking for carbides non destructively is not easy as you already know. A very crude segregation technique is to use a file either on the supect area, or where you expect the carbides - edges, corners, thin section or a critical area. Does not give quantitative result but can be a...
