CATHODIC PROCESS AND WEAR RESISTANCE OF ELECTRO- DEPOSITED RE-Ni-W-P-SiC COMPOSITE COATING
来源期刊：Acta Metallurgica Sinica2002年第4期
论文作者：X.Y.Zhu X.W.Yang Z.C.Guo R.D.Xu
Key words：electrodeposition; RE-Ni-W-P-SiC composite coating; cathodicprocess; hardness and wear resistance;
Abstract: Cathodic deposition current density of the composite coatings increases when SiC par-ticles and rare earth (RE) were added in the bath, which is profitable for Ni- W-P alloyto deposit in the cathod, forming Ni-W-P-SiC and RE-Ni-W-P-SiC composite coat-ings. On the contrary, the addition of PTFE in the bath decreases cathodic depositioncurrent density of the coatings. The current density increases a little when the amountof RE is 7-9g/l; however, the current density increases greatly when the amount ofRE is increased to 11-13g/l. But if the amount of RE is raised further, the currentdensity decreases. Hardness and wear resistance of RE-Ni-W-P-SiC composite coat-ing have been studied, and the results show that the hardness and wear resistance ofRE-Ni-W-P-SiC composite coating increase with increasing heat treatment tempera-ture, which reach peak values at 400℃; while the hardness and wear resistance of thecoating decrease with the rise of heat treated temperature continuously.
X.Y.Zhu1，X.W.Yang1，Z.C.Guo1，R.D.Xu1
(1.Faculty of Material and Metallurgy Engineering, Kunming University of Science and Technology, Kunming 650093, China)
Abstract:Cathodic deposition current density of the composite coatings increases when SiC par-ticles and rare earth (RE) were added in the bath, which is profitable for Ni- W-P alloyto deposit in the cathod, forming Ni-W-P-SiC and RE-Ni-W-P-SiC composite coat-ings. On the contrary, the addition of PTFE in the bath decreases cathodic depositioncurrent density of the coatings. The current density increases a little when the amountof RE is 7-9g/l; however, the current density increases greatly when the amount ofRE is increased to 11-13g/l. But if the amount of RE is raised further, the currentdensity decreases. Hardness and wear resistance of RE-Ni-W-P-SiC composite coat-ing have been studied, and the results show that the hardness and wear resistance ofRE-Ni-W-P-SiC composite coating increase with increasing heat treatment tempera-ture, which reach peak values at 400℃; while the hardness and wear resistance of thecoating decrease with the rise of heat treated temperature continuously.
Key words:electrodeposition; RE-Ni-W-P-SiC composite coating; cathodicprocess; hardness and wear resistance;
【全文内容正在添加中】
