摘要
研究了钛合金Ti6Al4V经过镀镍处理后作为航空航天材料的可行性。当钛合金经去油、活化等预处理后电镀镍,性能发生较大改变,比较了钛合金镀镍前后表面力学性能和摩擦学性能的变化,并将镀镍层摩擦学性能与氮化钢的摩擦学性能进行比较。研究表明,镀镍层与钛合金基体的结合强度达到了232 MPa,有足够高的结合力抵抗外界冲击,符合作为航空航天材料的要求;镀镍层的表面硬度达到527 Hv0.1,提高了钛合金表面的抗咬合、抗划伤能力,可以提高材料抗划伤切割的性能;在相同的干摩擦条件下,镀镍层磨损量仅为钛合金基体磨损量的1/47;而在水润滑条件下,镀镍层的磨损量则为钛合金基体磨损量的1/42,镀镍可以大大提高基体的抗滑动磨损性能;镀镍层和钛合金的抗磨粒磨损测试结果表明:在相同的试验条件下,镀镍层的磨损量为5.4mg/kr,钛合金的磨损量为28.9mg/kr,远大于镀镍层的磨粒磨损量,镀镍后钛合金抗磨粒磨损的性能得到极大提高。总之,钛合金施镀镍层不但具有良好的结合力,而且能极大提高钛合金的表面性能,与钛合金本身固有的高比强度和优良的耐蚀性相结合,将促进钛合金在航空航天工业中发挥重要作用。
The feasibility of Ti alloy Ti6Al4V plating Ni used in the air industry is searched in the paper.When the surface of Ti alloy is plated by Ni after degreasing and activation,the mechanics property and the tribology property of Ti alloy and its Ni plating coating is compared,and the tribology property of the Ni plating coating and the nitriding 45 steel is also compared.Results show that the Ti alloy plating Ni not only owns high surface hardness,but also own excellent anti-wear,can be as the material of air craft： the combinative intensity between Ni plating coating and Ti alloy is 232MPa,high enough to resist the impact of air environment,and fit to as the material of air craft;the hardness of Ni plating coating is 527Hv0.1,improve the seizure resistance and anti-scratching of Ti alloy,as it is used to be the material of air craft,Ti alloy can resist scratch well;on the condition of dry friction,the wear loss of Ni plating coating is only 1/47 of Ti alloy＇s,when lubricating by seawater,the wear loss of Ni plating coating is only 1/42 of Ti alloy＇s,so plate Ni on Ti alloy can improve the property of anti-sliding wear;the abrasive wear test shows that the wear loss of Ni plating coating is 5.4mg/1000kr,but the wear loss of Ti alloy is 28.9mg/1000kr,more serious than Ni plating coating,then plate Ni on Ti alloy can improve its property of anti-abrasive wear.To sum up,the plating coating of Ni is not only combine with Ti alloy tightly,but also improve the surface property of Ti alloy,tie in the high specific strength,excellent anti-erosion of Ti alloy,Ti alloy fits to be the material of air craft.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第2期249-252,共4页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2007CB607605)
中国矿业大学引进人才基金对本项目的大力资助
关键词
钛合金
航空航天
磨损
镀镍
摩擦
Ti alloy
air craft
wear
plating Ni
friction
