Ni398 and Ni818 base alloy coatings were deposited on 1045 steel by electrospark deposition technique (ESD).Forming properties,thickness,microhardness and wear resistance of the coatings were investigated.The chemical composition and crosssection morphology were analyzed through energy dispersive spectrum (EDS) and metalloscope.The results show that the technological parameter window of Ni398 is larger than that of Ni818 electrode.However,other properties of the Ni818 coating,such as thickness and microhardness,were better than those of the Ni398 coating.Especially the wornout volume of Ni818 coating is only 1/6 of that for 1045 steel and 1/3 for Ni398 coating.Chemical composition analysis indicated that the addition of Mo promoted grain refinement of nickel alloy.Metallographic analysis shows that the molten droplets of Ni398 coatings have an average structure thickness of 20-40 μm while the microstructure of Ni818 coatings is flat with width of 5-20 μm.
参考文献
| [1] | R.J. Wang;Y.Y. Qian;J. Liu .Structural and interfacial analysis of WC92-Co8 coating deposited on titanium alloy by electrospark deposition[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1/4):405-409. |
| [2] | 黄小鸥,汪瑞军.大型发电机转子轴径磨损区域的电火花堆焊修复[J].焊接,2000(12):26-29. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%