Why is ductile iron not used for brake drum usually?
Why is ductile iron not used for brake drum usually?
(OP)
Ductile iron has a very good comprehensive performance,why is it not used for brake drums(trucks or trailers)? Is it because of its weak heat conductivity and vibration damping capacity? Can I try have a try? Thanks!





RE: Why is ductile iron not used for brake drum usually?
RE: Why is ductile iron not used for brake drum usually?
But I heard that the normal failure of brake drums for truck or trailer are heat fatigue just as you mentioned 'HEAT CHECK' above.I know ductile iron has a very good heat fatigue resistant property.Can you give me some data for detail help including friction surface also? If I have a try to make ductile brake drums,what will happen? Will it be a low braking force due to low friction coefficient and low heat fatigue limit than gray iron?
where can I get these basic data? Thanks!
Best regards
RE: Why is ductile iron not used for brake drum usually?
Therefore, irrespective of any heat checking/friction issues, the reduced mass of ductle brake drums would defeat the purpose of the brake drums. Note that while disc brake rotors are not as massive as brake drums, they are also specifically designed to disapate the heat, not 'store' it until it can be disapated slowly once the brakes are de-activated.
rmw
RE: Why is ductile iron not used for brake drum usually?
RE: Why is ductile iron not used for brake drum usually?