摘要
Ni-W-B composites containing CeO2 nano-particles on the surface of 45 steel were prepared by pulse electrodeposition,and the in-fluence of pulse frequency,pulse duty circle and heat treatment temperature on the structures and properties were investigated.The results in-dicated that the pulse co-deposition of Ni,W,B and CeO2 nano-particles led to Ni-W-B/CeO2 composites possessing higher microhardness and better wear resistance when heat-treated at 400 oC for 1 h.The microhardness of 636 HV and the deposition rate of 0.0281 mm/h of the as-deposited alloy were the highest at pulse frequency of 1000 Hz,pulse duty circle of 10% and pulse average current density of 10 A/dm2.The composites were mainly in the amorphous state and were partially crystallized as-deposited,and the crystallization trend was strength-ened when heat-treated at 400 oC.Decreasing pulse duty cycle from 75% to 10% was favorable to the refinement in grain structures and im-provement of microstructures.The crystal sizes of the composites were smaller by means of pulse electrodeposition.
Ni-W-B composites containing CeO2 nano-particles on the surface of 45 steel were prepared by pulse electrodeposition,and the in-fluence of pulse frequency,pulse duty circle and heat treatment temperature on the structures and properties were investigated.The results in-dicated that the pulse co-deposition of Ni,W,B and CeO2 nano-particles led to Ni-W-B/CeO2 composites possessing higher microhardness and better wear resistance when heat-treated at 400 oC for 1 h.The microhardness of 636 HV and the deposition rate of 0.0281 mm/h of the as-deposited alloy were the highest at pulse frequency of 1000 Hz,pulse duty circle of 10% and pulse average current density of 10 A/dm2.The composites were mainly in the amorphous state and were partially crystallized as-deposited,and the crystallization trend was strength-ened when heat-treated at 400 oC.Decreasing pulse duty cycle from 75% to 10% was favorable to the refinement in grain structures and im-provement of microstructures.The crystal sizes of the composites were smaller by means of pulse electrodeposition.
作者
WANG Junli
XU Ruidong
ZHANG Yuzhi
王军丽;徐瑞东;章俞之(Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy En-gineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Inorganic Coating Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China)
基金
Project supported by National Natural Science Foundation of China (20806035)
Back-up Personnel Foundation of Academic and Technology Leaders of Yunnan Province(2009CI026)
Key Lab of Advanced Materials in Rare & Precious and Non-ferrous Metals,Ministry of Education(ZDS2010015C)
Yunnan Province Construction Plans of Scientific and Technological Conditions (2010DH025)
Opening Project of Key Laboratory of Inorganic Coating Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences (KKZ6200927001)
Training Foundation for Talents of Kunming University of Science and Technology (KKZ3200927029)
