外加纵向磁场对等离子弧堆焊层组织与性能的影响

对铁基合金Fe5进行等离子弧堆焊时外加纵向磁场来控制堆焊层的硬质相的形态及分布,并对堆焊层进行了硬度、磨损试验,显微组织及X射线衍射分析,对堆焊层组织性能进行研究.结果表明,施加纵向磁场的堆焊层明显比无磁场作用的堆焊层硬度高、耐磨性好;磁场电流为3 A时的堆焊层性能最佳;合金堆焊层的显微组织α,γ固溶体被充分细化,并获得理想的硬质相Cr7C3,CrB等.

Effects of applied longitudinal magnetic field on plasma arc hardfacing microstructure and property

To control the shape and distribution of hard phase,longitudinal magnetic field was applied during plasma hardfacing of Fe5 alloy.The hardness,wearing,microstructure and X-ray diffraction analysis of the hardfacing layer were tested as well as the structure and property of the handfacing layer of the powder.The results showed that the layer had higher hardness and better wearing with magnetic field than the layer formed without magnetic field.The properties of hardfacing layer were optimum when the magnetic...