中国机械工程2017，Vol.28Issue(13)：1608-1612,5.DOI:10.3969/j.issn.1004-132X.2017.13.015
机械冲击对高硬激光熔覆层力学性能与微观组织的影响
Effects of Mechanical Shocks on Mechanics Properties and Microstructures of High Hardness Laser Cladding
摘要
Abstract
In order to reduce the defects of high hardness alloy cladding layers,a new technique for the laser cladding processes was presented.The Ni based,Fe based and Co based three kinds of high hardness alloy cladding layers were prepared on the surfaces of 45 steel.The effects of mechanical shocks on the mechanics properties and microstructures of the cladding layers were compared and analyzed.Research results show that the surface cladding quality of cladding layers may be improved by loading the mechanical shocks,restrian cracks.Mechanical shocks have different impacts on mechanics properties of cladding layers of different materials.Ni65WC specimen may withstand the maximum load increased by 26.2％,but the total elongation is reduced by about 37％,the ratio of the maximum load to the Fe90 sample may be increased to 21.3％,and the total elongation is also approximately improved,the ratio of the maximum load to the Sti6+-3％WC sample may be increased to 9.04％,no obvious changes in the total elongation.Mechanical impacts make the microstructure significantly refined,micro hardness improved.关键词
熔覆层/冲击/力学性能/微观组织Key words
laser cladding/impact/mechanics property/microstructure分类
机械制造引用本文复制引用
郑丽娟,付宇明,王好平,齐童..机械冲击对高硬激光熔覆层力学性能与微观组织的影响[J].中国机械工程,2017,28(13):1608-1612,5.基金项目
国家自然科学基金资助项目(51105325) （51105325）
河北省自然科学基金资助项目(E2015203217,E2014203223) （E2015203217,E2014203223）
