碱预处理浓度对钛合金表面结构性能的影响  

Influence of alkali pretreatment concentration on surface structure and property of titanium alloy

作　　者：李明亮[1,2] 刘平[2] 刘新宽[3] 杜见第[4] 陈小红[3] 

机构地区：[1]盐城工业职业技术学院,江苏盐城224001 [2]上海理工大学机械工程学院,上海200093 [3]上海理工大学材料科学与工程学院,上海200093 [4]上海交通大学材料科学与工程学院,上海200030

出　　处：《金属热处理》2017年第10期38-41,共4页Heat Treatment of Metals

基　　金：上海市科学技术委员会重点科技攻关项目(11441900500)

摘　　要：采用扫描电子显微镜、X射线衍射仪、接触角测量仪、粗糙度轮廓仪等仪器研究了碱处理浓度对钛合金表面形貌、物相、润湿性、粗糙度的影响。结果表明,当碱液浓度为8 mol/L时,可得到在凝胶层不产生裂纹情况下的最大的表面微观窝状网孔孔洞,并获得小的接触角,且表面粗糙度Ra与粗糙度因子γ取得最大值;当碱液浓度大于4 mol/L以上适合处理钛合金基体,表面生成钛酸纳凝胶。综合表面形貌、物相、润湿性、粗糙度等分析,确定浓度为8 mol/L为最佳的碱预处理浓度。Scanning electron microscopy,X-ray diffraction,contact angle measuring instrument and roughness profile instrument were used to study the effect of alkali treatment on the surface morphology,phases,wettability and roughness of the titanium alloy. The results show that,when the alkali concentration is 8 mol/L,the maximum surface micro hole mesh is obtained without gel layer cracking,small contact angle appears,and the value of Raand roughness factor γ is maximum; when the alkali concentration is more than 4 mol/L,it is suitable for the treatment of titanium alloy substrate,sodium titanate gel is formed on the surface of titanium alloy. Together phases,surface morphology,wettability and roughness analysis,the concentration of 8 mol/L is the best concentration of alkali pretreatment.

关 键 词：TI6AL4V合金 碱处理 碱液浓度 结构性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]