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《Journal of Yangzhou University(Natural Science Edition)》 2012-01
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Manufacturing process and wear resistance of deep-tillage rotary blade

YUAN Xiao-ming1*,WANG Hong-yu1, ZHAO Yu-feng1,MIAO Hong2,ZHANG Rui-hong2(1.Sch of Mech Engin,Jiangsu Univ,Zhenjiang 212013,China; 2.Sch of Mech Engin,Yangzhou Univ,Yangzhou 225127,China)  
A novel rotary blade manufacturing process for quenching and medium-temperature tempering after chromizing(referred to as chromizing heat treatment process) was proposed in this work,aiming at meeting the hard-surface and tenacious-core performance requirements of rotary blade suitable for large tilling depth(over 20 cm).The dry frictional wear behavior in room temperature of the rotary blade prepared by the chromizing heat treatment process was investigated,compared with the conventional technique (overall quenching and low-temperature tempering).The results show that the typical hard-surface covered with high hardness chromizing layer and tenacious-core microstructure provided with good bend strength and toughness tempered troostite are obtained after chromizing heat treatment.Moreover,under the same experimental conditions,the friction factor of the sample prepared by chromizing heat treatment process reduces and the wear rate is only 0.408 for the one treated by the conventional technique.The rotary blade prepared by the chromizing heat treatment process can meet the requirements of deep-tilling rotary tillage in the rice-wheat cropping areas.
【Fund】: 国家科技支撑计划资助项目(2011BAD20B00);; 江苏省产学研联合创新资金计划资助项目(BY2010130);; 江苏大学高级人才启动基金(11JDG126)
【CateGory Index】: TG156.8
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