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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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rotor steel
A friend's Audi sedan made some funky noises while braking.
Pulling the solid, one-piece, rear rotor revealed why. The outer surface was fine, but the inner one showed the usual ~~smooth surface, and several patches where the surface was anything but. It was as if the surface was a plating or veneer....and flaked off. Underneath, the steel was rusty and visibly porous. This was in several spots from dime to quarter sized. While none of us are 8-5/40Hr auto mechanics, between us we have multiple engineering degrees, and many decades fixing our own cars; we've never seen anything like such. I'd assumed rotors are cast then turned, for both size and thickness. True? Are they hardened at some point? What could explain pores in such? -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
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