高精度硬质阳极氧化零件尺寸的控制  

Size Control of High-Precision Hard Anodized Parts

作　　者：陈晶 成阳 万里鹏 张净 Chen Jing;Cheng Yang;Wan Lipeng;Zhang Jing(AVIC Hongdu,Nanchang,Jiangxi,330095)

机构地区：[1]航空工业洪都,江西南昌330095

出　　处：《教练机》2024年第3期64-68,共5页Trainer

摘　　要：铝制件在不同浓度和温度条件下,碱腐蚀速率不同。使用LY12材料测试,零件精密孔孔径损失一般为3 μm~6 μm,如在槽液工艺允许的极限温度和浓度条件下,孔径损失可达8 μm。硬质阳极氧化后通常研磨5 μm即可满足粗糙度0.8和硬度250HV的要求,镀前尺寸应充分考虑设计装配要求、镀层厚度要求、碱腐蚀工序去除量及预留研磨余量等。同时,为保证硬质阳极氧化后的尺寸要求,可考虑将硬质阳极氧化前尺寸下移13 μm左右。The alkali corrosion rate of aluminum parts is different under different concentration and temperature conditions.When tested with LY12 material,the aperture loss of precision holes of part is generally 3μm-6μm,and it can be up to 8μm under limit temperature and concentration conditions allowed by the tank liquid process.After hard anodizing,a 5μm grinding is usually necessary to meet the requirements of roughness 0.8 and hardness 250 Hv.When confirming the size before anodizing,the design and assembly requirements,coating thickness requirements,removal amount of alkali corrosion process and the reserved grinding allowance should be taken into consideration.At the same time,in order to satisfy the size requirements after hard anodizing,the size before hard anodizing can be relaxed by about 13μm.

关 键 词：硬质阳极氧化 高精度尺寸 碱腐蚀工序 研磨 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG580.68[金属学及工艺—金属学]