沈阳工业大学学报2013，Vol.35Issue(1)：31-35,5.DOI:10.7688/j.issn.1000-1646.2013.01.06
磁控状态下Fe90堆焊层显微组织对力学性能的影响
Effect of microstructure on mechanical properties of Fe90 surfacing layer at magnetic control state
摘要
Abstract
In order to research the influence of direct current (DC) transverse magnetic field on microstructure and properties of Fe90 surfacing layer, the DC transverse magnetic field was introduced in the process of plasma arc surfacing for Fe90 self-fluxing surfacing alloy. The hardness and wear resistance of the specimens with different specifications were tested with Rockwell hardness tester and wear tester, and the microstructure of surfacing layer was observed with optical microscope (OM) and scanning electron microscope (SEM). Furthermore, the action mechanism of external magnetic field on the properties of surfacing layer was revealed. The results indicate that compared with the surfacing layer without external magnetic field, the surfacing layer with magnetic field exhibits higher hardness and better wear resistance. When the surfacing current is 180 A and magnetic field current is 3 A, the optimal properties of surfacing layer is acquired, where the wear loss of surfacing layer is 0. 421 8 g and the surface hardness is 72. 1 HRC. The main reason for the improvement in the properties of surfacing layer by external magnetic field is that the motion state of arc and molten pool changes under the action of magnetic field, and the microstructure of surfacing layer gets improved. The microstructure of surfacing layer changes from columnar crystal to equiaxed crystal, and the grains get refined, and thus, the comprehensive mechanical properties of surfacing layer are enhanced.关键词
直流磁场/堆焊/显微组织/铁基合金/耐磨性/等离子弧堆焊/电磁搅拌/横向磁场Key words
DC magnetic field/ surfacing/ microstructure/ iron based alloy/ wear resistance/ plasma arc surfacing/ electromagnetic stirring/ transverse magnetic field分类
矿业与冶金引用本文复制引用
刘政军,李乐成,武小娟,苏允海..磁控状态下Fe90堆焊层显微组织对力学性能的影响[J].沈阳工业大学学报,2013,35(1):31-35,5.基金项目
辽宁省自然科学基金资助项目(20042025). （20042025）
