公开(公告)号：US3896009A

公开(公告)日：1975-07-22

申请号：US48721374

申请日：1974-07-09

Applicant: KIORITZ CORP

Inventor： KOBAYASHI TORAO ,  NINAGAWA CHIKATO

IPC: C25D7/00 ,  C22F1/04 ,  C23G1/12 ,  C25D5/44 ,  F02F1/00 ,  F16J10/04 ,  C25D7/04

CPC classification number: C25D5/44 ,  F02F1/00 ,  F02F2007/009 ,  F05C2201/021 ,  F05C2201/0475 ,  F05C2203/04 ,  F16J10/04 ,  Y02T10/142 ,  Y10S417/01 ,  Y10T428/12701 ,  Y10T428/12708 ,  Y10T428/1275

Abstract: An improved aluminum-silicon hypereutectic alloy cylinder is provided by the following steps: machining the sliding surface of the cylinder to given dimensions; finishing the sliding surface to a degree that the primary crystal grains of silicon clearly appear; subjecting the finished surface to acid pickling to remove to a given depth the eutectic aluminum solid solution surrounding the primary crystal grains of silicon; subjecting the thus treated finished surface to a pickling-activating treatment which does not substantially corrode the primary crystals of silicon but retains them intact; electroplating a metal or alloy onto the sliding surface to give a layer flush with the top finished surfaces of the primary crystal grains of silicon, the type of metal or alloy electroplated depending on the contemplated member mating, to thereby improve the sliding performance of the sliding surface; whereby the top surfaces of the primary crystal grains of silicon and the electroplated metal surfaces provide the desired sliding surface in combination.

Abstract translation: 通过以下步骤提供改进的铝硅过共晶合金圆筒：将圆筒的滑动表面加工成给定的尺寸; 将滑动表面整理到硅的主晶粒清楚地出现的程度; 使成品表面进行酸洗，以除去一定深度的包围硅的初晶晶粒的共晶铝固溶体; 使经过处理的成品表面进行酸洗活化处理，该处理基本上不会腐蚀硅的一次晶体，但保持它们完整; 将金属或合金电镀到滑动表面上以使其与硅的主晶粒的顶部成品表面齐平，根据预期的构件配合电镀的金属或合金的类型，从而改善滑动的滑动性能 表面; 由此硅的主晶粒和电镀金属表面的顶表面组合提供期望的滑动表面。