脉冲能量对钛合金微弧氧化陶瓷膜性能的影响研究  

Effects of the Pulse Energy on the Characteristics of Ceramic Coatings on Titanium Alloys Prepared by Micro-arc Oxidation

作　　者：王军华[1,2] 杜茂华[1] 王津[2,3] 徐成[2] 韩福柱[2,3] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500 [2]清华大学机械工程系,北京100084 [3]精密超精密制造装备及控制北京市重点实验室,北京100084

出　　处：《电加工与模具》2014年第1期47-50,共4页Electromachining & Mould

摘　　要：微弧氧化是一种在钛合金基体表面制备致密均匀超硬氧化陶瓷膜层的新方法。从脉冲频率和占空比入手,研究了单脉冲放电能量对钛合金微弧氧化陶瓷膜厚度、表面形貌的影响。结果表明:当占空比固定不变时,随着频率的增加,单脉冲放电能量不断减小,氧化膜的厚度逐渐降低,显微硬度呈降低趋势,氧化膜表面的放电微孔尺寸逐渐减小,微孔数量逐渐增多;当脉冲频率固定不变时,随着占空比的增大,单脉冲放电能量不断增大,氧化陶瓷膜厚度逐渐增大,显微硬度呈增加趋势,氧化膜表面的放电微孔尺寸逐渐增大,微孔数量逐渐减少,表面粗糙度值逐渐增加。Micro-arc oxidation （MAO） is a novel and unique technique for depositing thick,dense and ultra-hard oxidative ceramic coatings on titanium alloys substrates. This work investigated the effects of a single pulse energy on characteristics of the ceramic coatings on titanium alloys substrates through the parameters of pulse frequent and duty. It was founded that the thickness and micro-hardness of ceramic coatings are decreasing,size of surface pore discharged is decreasing,and the pore number is increasing gradually while the duty is not changing,the pulse frequency is increasing and a single pulse energy is decreasing. The thickness and micro-hardness size of surface pore discharged,surface roughness of ceramic coatings are increasing and the pore number is decreasing gradually as the pulse duty,a single pulse energy and the thickness of coating is increasing.

关 键 词：微弧氧化 钛合金 脉冲频率 占空比 陶瓷膜 

分 类 号：TG178[金属学及工艺—金属表面处理]