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《Journal of Yangzhou University(Natural Science Edition)》 2014-03
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Surface properties of big tilling depth rotary blade after laser shock peening

ZHAO Li;XI Xiaobo;MIAO Hong;JIN Yifu;ZHENG Zaixiang;ZHANG Ruihong;Sch of Mech Engin,Yangzhou Univ;  
The stress concentration area of big tilling depth rotary blade with 350 mm turning radius is found by ANSYS,and strengthened by laser shock peening(LSP).The surface properties of rotary blade for LSP,included residual stress,surface micrograph,microstructure and hardness,are researched in this article.The results show that the density is higher after LSP,and the layer is smoother,so the stress concentration is decreased.Meanwhile,the hardness and residual stress of rotary blade surface layers are significantly increased.The average residual stress reaches390.7MPa,and the average Rockwell hardness number(HRC)achieves 45.1,the depth of the hardened layer in the shocked area is 15μm.
【Fund】: “十二五”农村领域国家科技计划课题资助(2011BAD20B03-02);; 江苏省农机三新工程资助项目(NJ2012-11);; 江苏省产学研前瞻性联合研究项目资助(BY2012164);; 江苏省科技支撑计划(农业)项目资助(BE2014356)
【CateGory Index】: S222
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