CAJ | 학술논문

选取0.8μm、1.5μm、3.5μm三种WC颗粒度的WC-17Co复合粉末,采用等离子喷涂工艺在Q235钢表面制备了涂层.通过扫描电镜、显微硬度仪对3种粉末及其涂层的本征性能进行了测定及分析,利用滑动磨损试验研究了涂层磨粒磨损性能.结果表明:等离子喷涂过程中,原始颗粒度更大的WC在喷涂过程中较难分解, 3.5μm-WC的涂层中WC颗粒形貌更为完整.颗粒度越大,涂层的显微硬度更高,且各向同性表现更好,3.5μm-WC的表面显微硬度为1124.7,截面显微硬度达到1163.7.抗磨粒磨损性能也更为优异,3.5μm-WC的涂层摩擦系数在最短的时间到达稳态,摩擦系数最低,为0.546,涂层磨粒磨损量最少,仅为0.5mg.
선취0.8μm、1.5μm、3.5μm삼충WC과립도적WC-17Co복합분말,채용등리자분도공예재Q235강표면제비료도층.통과소묘전경、현미경도의대3충분말급기도층적본정성능진행료측정급분석,이용활동마손시험연구료도층마립마손성능.결과표명:등리자분도과정중,원시과립도경대적WC재분도과정중교난분해, 3.5μm-WC적도층중WC과립형모경위완정.과립도월대,도층적현미경도경고,차각향동성표현경호,3.5μm-WC적표면현미경도위1124.7,절면현미경도체도1163.7.항마립마손성능야경위우이,3.5μm-WC적도층마찰계수재최단적시간도체은태,마찰계수최저,위0.546,도층마립마손량최소,부위0.5mg.
Selecting 0.8μm,1.5μm,3.5μm three kinds of particle size of WC,and preparing of WC-17Co composite powder. By scanning electron microscope and microhardness tester, the intrinsic properties of these powders and the coating were determined and analyzed. The sliding wear test was used to study the abrasive wear performance of the coating. Results show that the plasma spraying process, the greater particle size WC is more difficult to decompose in the process of spraying, the WC particles of WC-17Co coating of 3.5μm WC is more complete. The greater particle size is, the better microhardness and isotropic are. The surface microhardness of WC-17Co coating of 3.5μm WC is 1124.7, and the cross-section microhardness reaches 1163.7. The coating of 3.5μm-WC reach steady state friction coefficient in the shortest time,the friction coefficient is 0.546,coating of abrasive wear is the least, only 0.5 mg. So the abrasion wear is more excellent performance than others.