摘要
采用化学腐蚀技术解决激光选区熔化(Selective laser melting,SLM)成形钛合金表面黏附粉末导致表面粗糙的问题,系统研究了腐蚀溶液成分及工艺参数对SLM成形TC4钛合金表面粗糙度的影响。研究结果表明,腐蚀液的成分配比与腐蚀时间是主要的影响因素,随着HF/HNO_(3)体积比的减小,样品表面粗糙度降低效果减弱。当HF/HNO_(3)=1/4时,随着腐蚀时间的增加,样品表面粗糙度显著降低,但当腐蚀时间过长时会造成对基体的损伤。当HF:HNO_(3)体积比=1:4,腐蚀时间为9 min时,样品表面粗糙度为2.52μm,同时腐蚀处理过程对样品的尺寸影响较小(降低0.12 mm),此时达到一个最佳状态。
Aiming to the problem of surface roughness caused by the adhesion of powder on the surface of TC4Ti-alloy fabricated by Selective Laser Melting(SLM),the influence of chemical etching process,including the formula of etching solution and process parameters,on the surface roughness of the SLMed Ti-alloy was investigated.The results shown that the ratio of HF/HNO_(3)of the etching solution and the etching time are the main influencing factors.Among them,HF play an important role in reducing the surface roughness of the fabricated Ti-alloy.However,this reducing effect of HF will be weakened as the ratio of HF/HNO_(3)decreases.For a constant ratio of HF/HNO_(3)(say HF/HNO_(3)=1/4),the surface roughness decreases obviously with the increasing etching time,but when the etching time is too long,it will cause damage to the substrate.After etching in the solution of HF:HNO_(3)=1:4 for 9 minutes,the surface roughness of the fabricated TC4 Ti-alloy is 2.52μm.At the same time,the etching process has little effect on the size of the sample(with c.a.0.12 mm of thickness reduction),in other words,the etching process reached an optimal state at this time.
作者
蔡雨升
韩洪智
任德春
吉海宾
雷家峰
CAI Yusheng;HAN Hongzhi;REN Dechun;JI Haibin;LEI Jiafeng(Division of Titanium Alloys,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2022年第6期435-442,共8页
Chinese Journal of Materials Research
基金
中国航发集团产学研合作项目(HFZL2019CXY019)。
关键词
金属材料
激光选区熔化
TC4钛合金
化学腐蚀
表面粗糙度
metallic materials
selective laser melting
TC4 titanium alloy
chemical corrosion
surface roughness
