化学镀镍次数对TC6钛合金性能的影响
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摘要
为探索化学镀镍次数对TC6钛合金性能的影响,利用扫描电镜、拉伸试验机、疲劳试验机等设备对镀镍后TC6钛合金的表面形貌、结合力、力学性能、氢脆性进行了分析。结果表明:第1次镀镍后基体抗拉强度σ_b、断后延伸率δ_5分别下降了2.3%、1.0%,而断面收缩率ψ增加了12.2%;第5次化学镀镍后基体抗拉强度σ_b、断后延伸率δ_5、断面收缩率ψ分别下降了1.3%、5.9%、13.1%;多次化学镀镍后TC6钛合金疲劳极限值由401 MPa降至238.3 MPa;5次化学镀镍后对镀层的结合力、氢脆性影响较小。
In order to explore the influence of electroless nickel plating times on the properties of TC6 titanium alloy,the surface morphology,adhesion,mechanical properties and hydrogen embrittlement of TC6 titanium alloy were analyzed by scanning electron microscope,tensile tester and fatigue tester through multiple plating. The results showed that the tensile strength(σ_b),elongation(δ_5) of the substrates after the first times of electroless nickel plating were decreased by 2.3% and 1.0%,but the shrinkage(ψ)was increased by 12.2%;after five times of electroless nickel plating,the tensile strength(σ_b),elongation(δ_5) and shrinkage(ψ)were decreased by 1.3%,5.9% and 13.1% respectively. After repeated elecroless nickel plating,the fatigue limit of TC6 titanium alloy decreased from 401 MPa to 238.3 MPa. The adhesion and hydrogen embrittlement of TC6 titanium alloys after five times of electroless nickel plating were less affected.
In order to explore the influence of electroless nickel plating times on the properties of TC6 titanium alloy,the surface morphology,adhesion,mechanical properties and hydrogen embrittlement of TC6 titanium alloy were analyzed by scanning electron microscope,tensile tester and fatigue tester through multiple plating. The results showed that the tensile strength(σ_b),elongation(δ_5) of the substrates after the first times of electroless nickel plating were decreased by 2.3% and 1.0%,but the shrinkage(ψ)was increased by 12.2%;after five times of electroless nickel plating,the tensile strength(σ_b),elongation(δ_5) and shrinkage(ψ)were decreased by 1.3%,5.9% and 13.1% respectively. After repeated elecroless nickel plating,the fatigue limit of TC6 titanium alloy decreased from 401 MPa to 238.3 MPa. The adhesion and hydrogen embrittlement of TC6 titanium alloys after five times of electroless nickel plating were less affected.
引文
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[2] Guo J J. Development and prospect of titanium industry in the world in 2005[J]. Rare Metals letters,2006,25(7):6-10.
[3]梁春华,李晓欣.先进材料在战斗机发动机上的应用于研究趋势[J].航空材料学报,2013,32(6):32-36.
[4]杨鹏,赵金航,王娟,等.提高钛合金零件镀铬结合力[J].电镀与精饰,2015,37(8):28-31.
[5]宁铮,赵晴,陈庆龙,等.钛合金化学镀镍层结合力影响因素探讨[J].材料保护,2010,43(2):33-35.
[6]周伟,岩石,康书文.钛合金化学镀镍工艺[J].电镀与精饰,2006,28(3):20-21.
[7]李博.提高TC6钛合金零件镀铬层结合力的方法[J].电镀与精饰,2014,36(3):26-28.
[8]中国航空材料手册编辑委员会.中国航空材料手册:涂料镀覆层与防锈材料(第9卷)[M].北京:中国标准出版社,2002.
[9]汤智慧,王长喜,贡兴嘉,等.电镀硬铬工艺对TC6钛合金性能的影响研究[J].航空材料学报,2012,32(4):49-52.
[10]何晓,沈保罗,曹建玲,等.氢对两种新型钛合金轻度和塑性的影响[J].稀有金属材料与工程,2003,32(5):390-393.
[11]李晓刚.材料腐蚀与防护[M].长沙:中南大学出版社,2015.
[12]谢华,陈文哲,钱匡武.热处理对Ni-P镀层内应力及结合强度的影响[J].电镀与环保,2004,24(3):13-15.
[13]王敏,刘锦云,李文鹏,等.热处理对铜基化学镀镍层结构和性能的影响[J].西华大学学报(自然科学版),2014,33(3):29-32.