CAJ | 학술논문

为了提高纯铜表面的耐磨性能，采用电镀/浆料包渗相结合的方法，以 TiO2粉为渗 Ti 源，纯 Al 粉为还原剂，在 Cu 表面预镀 Ni 随后表面浆料包渗Ti-Al，制备Ti-Al 共渗层。研究了包渗温度对 Ti-Al渗层组织和耐磨性能的影响。采用SEM和XRD分析了渗层表面形貌和结构。结果表明：在800~950°C共渗12 h时，随着温度的升高，渗层组织变化过程为 NiAl+Ni3(Ti,Al)→NiAl+Ni3(Ti,Al)+Ni4Ti3→Ni4Ti3+NiAl→NiAl+Ni3(Ti,Al)+NiTi；Ti-Al 渗层的摩擦因数随着包渗温度的升高而降低，最小摩擦因数约为纯铜的1/3，最小硬度为纯铜的5倍。
위료제고순동표면적내마성능，채용전도/장료포삼상결합적방법，이 TiO2분위삼 Ti 원，순 Al 분위환원제，재 Cu 표면예도 Ni 수후표면장료포삼Ti-Al，제비Ti-Al 공삼층。연구료포삼온도대 Ti-Al삼층조직화내마성능적영향。채용SEM화XRD분석료삼층표면형모화결구。결과표명：재800~950°C공삼12 h시，수착온도적승고，삼층조직변화과정위 NiAl+Ni3(Ti,Al)→NiAl+Ni3(Ti,Al)+Ni4Ti3→Ni4Ti3+NiAl→NiAl+Ni3(Ti,Al)+NiTi；Ti-Al 삼층적마찰인수수착포삼온도적승고이강저，최소마찰인수약위순동적1/3，최소경도위순동적5배。
In order to improve the wear resistance properties of copper substrate, a layer of electroplated nickel was firstly deposited on copper substrate, subsequently these electroplated specimens were treated by slurry pack cementation process with a slurry pack cementation mixture composed of TiO2 as titanizing source, pure Al powder as aluminzing source and also a reducer for titanizing, an activator of NH4Cl and albumen (egg white) as cohesive agent. The Ti-Al coating was fabricated on the surface of electro-deposited nickel layer on copper matrix followed by the slurry pack cementation process. The effects of slurry pack cementation temperature on the microstructures and wear resistance of Ti-Al coating were studied. The results show that the microstructure of the coating changed from NiAl+Ni3(Ti,Al) to NiAl +Ni3(Ti,Al)+Ni4Ti3 to Ni4Ti3+NiAl, and to NiAl+Ni3(Ti,Al)+NiTi with slurry pack cementation temperature ranging from 800 °C to 950 °C in 12 h. The friction coefficient of Ti-Al coating decreased and the hardness increased with increasing the slurry pack cementation temperature. The minimum friction coefficient was 1/3 and the minimum hardness was 5 times larger than that of pure copper.