Exactly What Are The Corner Seals Made From?
#2
I haven’t done any EDS on one but it is a cast iron with fine pearlite grains and what appears to be large ferrite grains with large carbon flakes (which makes them brittle) they are also chromium plated. According to an SAE paper it is a flaky graphite cast iron containing boron and phosphorus with a structure of steadite and carbide dispersed in a pearlite matrix. I’m not sure if this paper refers to the latest seal materials or even S5 engines as the structure does not look like that describe by Mazda. The paper is on the net somewhere Mat-tech86-5-8.pdf and Mat-tech86-1-4.pdf
#7
Looking at the structures of the seals the side seals are definitely sintered (made from a powder) but the apex and corner seals don’t appear to be. If you are going to make some they need to be chromium plated otherwise they will wear the rotors, the dissimilar material ie chromium and iron will not fret and microweld as badly as iron on iron. Your best bet to find out what the material is would be to look at the microstructure and compare it to those of known materials in text books
Are you trying to make some like the Hurley design
Are you trying to make some like the Hurley design
#9
[quote name='Cheesy' date='Apr 19 2005, 02:29 PM']Looking at the structures of the seals the side seals are definitely sintered (made from a powder) but the apex and corner seals don’t appear to be. If you are going to make some they need to be chromium plated otherwise they will wear the rotors, the dissimilar material ie chromium and iron will not fret and microweld as badly as iron on iron. Your best bet to find out what the material is would be to look at the microstructure and compare it to those of known materials in text books
Are you trying to make some like the Hurley design
[/quote]
not like hurley...something different.
Are you trying to make some like the Hurley design
[snapback]702039[/snapback]
[/quote]
not like hurley...something different.
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