AlSn20Cu轴瓦制造缺陷的分析研究  

STUDY ON MANUFACTURING DEFECT OF TIN-ALUMINIUM BEARINGS

作　　者：陶景光[1] 冯继军[1] 周家文[2] 黄文长[2] 

机构地区：[1]华中科技大学材料学院,武汉430074 [2]东风汽车公司工艺研究所,湖北十堰442001

出　　处：《理化检验（物理分册）》2001年第4期144-147,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：在 Al Sn2 0 Cu轴瓦生产中 ,发现其表面有宏观呈“白点”,微观形似铸造疏松的缺陷。对该缺陷进行了分析 ,并跟踪分析了轴瓦生产的全过程 ,找出了产生缺陷的微观机制和影响因素 ,即宏观“白点”系轴瓦再结晶退火工艺中出现的成分偏析所致 ,其与合金的原始晶粒、铸造缺陷、气体含量、特别是最终退火温度和保温时间有关。White spot” defects, exhibiting cast porosity like feature, were observed on tin aluminium bearing surface. A detailed study on bearing manufacturing process showed that “white spot” defects were results of composition segregation during recrystallization annealing of bearing. Cast alloy grain size, cast defects, gas content, temperature and holding time of final annealing treatment of bearing may be responsible for defects formation.

关 键 词：铝锡合金 轴瓦 “白点”缺陷 再结晶退火 成分偏析 汽车发动机 

分 类 号：U465.21[一般工业技术—材料科学与工程] TG156.26[机械工程—车辆工程]