A diesel engine crankshaft is failed in journal and the dominant failure mechanism is wear.A 6R robot-based automatic high velocity arc spraying system was developed in this study.The remanufacturing process of engine...A diesel engine crankshaft is failed in journal and the dominant failure mechanism is wear.A 6R robot-based automatic high velocity arc spraying system was developed in this study.The remanufacturing process of engine crankshaft was designed based on the newly developed automatic spraying system and the FeAlNbB cored wire.The two spraying way planning were designed.The results of industrial application in miniature show that,both of the main shaft journal and the crank journal of the crankshaft can be deposited of coating in only one procedure using the developed automatic spraying technology,and a reliable quality remanufactured part was obtained.A comparative evaluation shows that the improvement process offers several benefits.Such as,the coating bond strength and spray rates are all highly increased;the remanufactured cost and time are decreased.Furthermore,this technology has several advantages such as energy and material saving,and environmental protecting,a wide application foreground for this technology is therefore performed.展开更多
The fretting behavior of Zn-Al-Mg-RE coating prepared by high velocity arc spraying was studied for the first time in this paper.All specimens were fretted in air and 3.5%NaCl solution independently.The worn surfaces ...The fretting behavior of Zn-Al-Mg-RE coating prepared by high velocity arc spraying was studied for the first time in this paper.All specimens were fretted in air and 3.5%NaCl solution independently.The worn surfaces of the coating were investigated by scanning electron microscopy and X-ray energy dispersive spectroscopy.Fretting tests have shown that friction coefficient in 3.5%NaCl solution was similar to dry condition for Zn-Al-Mg-RE coating.Study of worn surfaces revealed the main mechanism in dry friction was the oxidative wear;while in 3.5%NaCl solution,the main mechanisms were delamination process and abrasive wear.展开更多
This paper is focus on the corrosion resistance property analysis on three electric blasting of the coating-FeAl,FeCrAl,FeCrAlRE by electrochemical noise technology,acceleration of copper acetate salt spray accelerate...This paper is focus on the corrosion resistance property analysis on three electric blasting of the coating-FeAl,FeCrAl,FeCrAlRE by electrochemical noise technology,acceleration of copper acetate salt spray accelerated corrosion test.According to a comparative analysis of three tests coated by the Impedance curve,FeCrAlRE coating power spectral density(SPD)curve and Power curve,FeAl,FeCrAlRE coating has two more notable for the corrosion resistance properties than FeAl,FeCrAl coatings.展开更多
基金"973"Project(2011CB013403)National Science and Technology Supporting Project(2011baf11B07)Natural Science Foundation of China(50735006,50971132)
文摘A diesel engine crankshaft is failed in journal and the dominant failure mechanism is wear.A 6R robot-based automatic high velocity arc spraying system was developed in this study.The remanufacturing process of engine crankshaft was designed based on the newly developed automatic spraying system and the FeAlNbB cored wire.The two spraying way planning were designed.The results of industrial application in miniature show that,both of the main shaft journal and the crank journal of the crankshaft can be deposited of coating in only one procedure using the developed automatic spraying technology,and a reliable quality remanufactured part was obtained.A comparative evaluation shows that the improvement process offers several benefits.Such as,the coating bond strength and spray rates are all highly increased;the remanufactured cost and time are decreased.Furthermore,this technology has several advantages such as energy and material saving,and environmental protecting,a wide application foreground for this technology is therefore performed.
文摘The fretting behavior of Zn-Al-Mg-RE coating prepared by high velocity arc spraying was studied for the first time in this paper.All specimens were fretted in air and 3.5%NaCl solution independently.The worn surfaces of the coating were investigated by scanning electron microscopy and X-ray energy dispersive spectroscopy.Fretting tests have shown that friction coefficient in 3.5%NaCl solution was similar to dry condition for Zn-Al-Mg-RE coating.Study of worn surfaces revealed the main mechanism in dry friction was the oxidative wear;while in 3.5%NaCl solution,the main mechanisms were delamination process and abrasive wear.
文摘This paper is focus on the corrosion resistance property analysis on three electric blasting of the coating-FeAl,FeCrAl,FeCrAlRE by electrochemical noise technology,acceleration of copper acetate salt spray accelerated corrosion test.According to a comparative analysis of three tests coated by the Impedance curve,FeCrAlRE coating power spectral density(SPD)curve and Power curve,FeAl,FeCrAlRE coating has two more notable for the corrosion resistance properties than FeAl,FeCrAl coatings.
