中国机械工程2017，Vol.28Issue(19)：2378-2382,5.DOI:10.3969/j.issn.1004-132X.2017.19.017
交变磁场对高硬熔覆层组织与性能的影响
Effects of Alternating Magnetic Field on Microstructures and Mechanics Properties of High Hardness Cladding Layers
摘要
Abstract
In order to improve the mechanics properties of high hardness lasers cladding layers,in the laser cladding processes,a class of sinusoidal alternating magnetic field was applied.The high hardness alloy cladding layers were prepared on the Q235A surface.The tensile tests,the impact tests,the fracture analyses,the microstructure observations,the phase analyses,the micro hardness tests and the comparative analyses of wear resistance of the test specimens were carried out.The effects of alternating magnetic field on the mechanics properties and microstructures of the cladding layers were studied.Research results show that in the laser cladding processes,the loading intensity is as 50 mT and the frequency is as 20 Hz,the tensile strength of the sample may be increased by about 9%,extension rate is increased by about 1%,impact toughness increased by about 11%,and the ten-sile fracture surfaces are obviously tough,material organizations are more detailed and dense;The mi-crohardness of the cladding layers increase with the increase of the magnetic induction strength,but the changes of magnetic field frequency are very small.When the alternating frequency is as 25 Hz, the magnetic field amplitude is as 60 mT,the loss weight of the mill is reduced by 15%.关键词
激光熔覆/交变磁场/熔覆层/力学性能/微观组织Key words
laser cladding/alternating magnetic field/cladding layer/mechanics property/micro-structure分类
矿业与冶金引用本文复制引用
付宇明,齐童,宗磊,郑丽娟..交变磁场对高硬熔覆层组织与性能的影响[J].中国机械工程,2017,28(19):2378-2382,5.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）
