CAJ | 학술논문

基于非光滑表面减阻理论，采用化学刻蚀的方法在不锈钢针头上构建微观结构。利用光学视频测试仪和超景深三维扫描系统分别对试样表面的润湿性和微观结构进行了检测与表征。通过测量接触角和穿刺阻力试验研究其疏水性和减阻特性关系，并对其穿刺减阻机理进行了分析。试验结果表明：试样接触角越大，减阻效果越明显。研究其机理发现，化学刻蚀形成的微观结构增加了针头表面的疏水性能，降低了针头表面的摩擦系数，从而达到了减阻效果。因此，经化学刻蚀方法可以在一定程度上调控不锈钢针头表面的疏水性进而控制其减阻特性。
기우비광활표면감조이론，채용화학각식적방법재불수강침두상구건미관결구。이용광학시빈측시의화초경심삼유소묘계통분별대시양표면적윤습성화미관결구진행료검측여표정。통과측량접촉각화천자조력시험연구기소수성화감조특성관계，병대기천자감조궤리진행료분석。시험결과표명：시양접촉각월대，감조효과월명현。연구기궤리발현，화학각식형성적미관결구증가료침두표면적소수성능，강저료침두표면적마찰계수，종이체도료감조효과。인차，경화학각식방법가이재일정정도상조공불수강침두표면적소수성진이공제기감조특성。
Based on the theory of nonsmooth surface drag reduction, the chemical etching method is used to build the microstructure on the stainless steel needles. The wettability and microstructure on the sample surface were characterized by optical contact angle measuring instrument and super depth of 3 d scanning system, respectively. The relationship between the hydrophobicity and flow drag reduction has been studied through the measurement of contact angle (CA) and the puncture resistance test, and the tribological performances of the sample surface were studied in friction and wear test machine.The results show that the CA is bigger, the effects of drag reduction would be more remarkable;the hydrophobicity of needle surface is increased and the friction factor of needle surface is reduced by the microstruc-ture of the needle surface formed by the chemical etching method. As a result,the hydrophobicity of the stainless steel needles surface could be prepared by the chemical etching method and also the characteristics of drag reduction would be controlled.