冷激合金铸铁气门挺杆表层组织对其耐磨性的影响  

Influence of Surface Layer Microstructure on Wear Resistance of Chilled Alloy Cast Iron Tappet

作　　者：赵建才[1] 梅殿君 

机构地区：[1]上海交通大学机械与动力工程学院,上海200200 [2]济南沃德汽车零部件公司,山东济南250022

出　　处：《机械工程材料》2007年第2期50-52,共3页Materials For Mechanical Engineering

摘　　要：为了深入了解冷激合金铸铁气门挺杆的磨损规律,研究了冷激合金铸铁气门挺杆表层组织对耐磨性的影响。结果表明:当气门挺杆组织中的石墨以点状均匀分布,碳化物呈细小针状、块状,分布较为均匀时,耐磨性较好,磨损形式以划伤、点蚀为主;当气门挺杆组织中的石墨以片状均匀分布,碳化物呈粗大针状、块状,分布不均匀时,耐磨性较差,磨损形式以剥落为主。In order to deeply comprehend the wear regularity of chilled alloy cast iron tappet, the influence of surface layer microstructure on wear resistance was studied. When the microstructure of surface layer is in the form of fine spot graphite and acicular or blocky carbide distributing equably, wear resistance of the tappet is high and wearing form is mainly scratch and pitting corrosion. Otherwise, when the microstructure of surface layer is in the form of lamellar graphite and rough acicular or blocky carbide distributing unevenly, wear resistance of the tappet is low and wearing form is mainly spalling corrosion.

关 键 词：冷激合金铸铁 气门挺杆 组织 耐磨性 

分 类 号：TG143.6[一般工业技术—材料科学与工程] TG113.1[金属学及工艺—金属材料]