| 摘要 |
PURPOSE:To manufacture brake parts superior in mechanical property at the vicinity of attachiment part of hub and having improved brake performance near sliding part, by embedding chiller near hub attaching part in mold and pouring molten metal of hyper-eutectic flaky graphite cast iron compsn. CONSTITUTION:Chiller is embedded near hub attaching part of sand mold, molten metal having hyper-eutectic flaky graphite cast iron compsn. is poured to cast brake parts. In the parts, vicinities of sliding part and hub attaching part are composed of flaky graphite having high damping and cast iron structure having high strength respectively. If necessary, the cast goods are heated are held at >= temp. where eutectic cementite is decomposed, thereafter cooled as it from temp. range where matrix structure is austenite. By the method, brake parts having improved endurance service life and safty is obtd.
|
