机械工程材料
機械工程材料
궤계공정재료
Materials for Mechanical Engineering
2015年
10期
52-55
,共4页
周夏凉%陈小明%吴燕明%伏利%王莉容%马红海
週夏涼%陳小明%吳燕明%伏利%王莉容%馬紅海
주하량%진소명%오연명%복리%왕리용%마홍해
超音速火焰喷涂%WC-10Co4Cr 涂层%显微硬度%结合强度%断裂
超音速火燄噴塗%WC-10Co4Cr 塗層%顯微硬度%結閤彊度%斷裂
초음속화염분도%WC-10Co4Cr 도층%현미경도%결합강도%단렬
HVOF%WC-10Co4Cr coating%micro-hardness%bond strength%fracture
采用超音速火焰喷涂技术(HVOF)在不锈钢基体上制备了 WC-10Co4Cr 涂层,测试了涂层的显微硬度和结合强度,研究了涂层的物相组成和横截面、断裂面的形貌,分析了涂层的断裂方式和断裂机理.结果表明：WC-10Co4Cr 涂层的平均显微硬度达1147．6 HV,结合强度为70 MPa；涂层的拉伸断裂为典型的脆性断裂,没有明显的塑性变形过程；涂层中颗粒间的孔隙和微裂纹在外应力的作用下形成裂纹,裂纹沿颗粒与颗粒间的界面扩展并伴随扩展方向的偏转,最终导致涂层的断裂.
採用超音速火燄噴塗技術(HVOF)在不鏽鋼基體上製備瞭 WC-10Co4Cr 塗層,測試瞭塗層的顯微硬度和結閤彊度,研究瞭塗層的物相組成和橫截麵、斷裂麵的形貌,分析瞭塗層的斷裂方式和斷裂機理.結果錶明：WC-10Co4Cr 塗層的平均顯微硬度達1147．6 HV,結閤彊度為70 MPa；塗層的拉伸斷裂為典型的脆性斷裂,沒有明顯的塑性變形過程；塗層中顆粒間的孔隙和微裂紋在外應力的作用下形成裂紋,裂紋沿顆粒與顆粒間的界麵擴展併伴隨擴展方嚮的偏轉,最終導緻塗層的斷裂.
채용초음속화염분도기술(HVOF)재불수강기체상제비료 WC-10Co4Cr 도층,측시료도층적현미경도화결합강도,연구료도층적물상조성화횡절면、단렬면적형모,분석료도층적단렬방식화단렬궤리.결과표명：WC-10Co4Cr 도층적평균현미경도체1147．6 HV,결합강도위70 MPa；도층적랍신단렬위전형적취성단렬,몰유명현적소성변형과정；도층중과립간적공극화미렬문재외응력적작용하형성렬문,렬문연과립여과립간적계면확전병반수확전방향적편전,최종도치도층적단렬.
WC-10Co4Cr coating was prepared on the substrate of stainless steel by high velocity oxygen fuel (HVOF)spraying.The micro-hardness and bond strength of the coating were investigated;phase composition, section and surface morphology was studied;and the fracture mode and mechanism were analyzed as well.The results show that the average micro-hardness of the WC-10Co4Cr coating reached to 1 147.6 HV and the bond strength was 70 MPa.The tensile fracture was with typical characteristics of brittle fracture and there was no significant plastic deformation.The fracture cracks were formed under the external stress due to the pores and microcracks among particles in the coating.These cracks propagated along the interface between particle and particle and were accompanied by deflections of crack paths,then caused the fracture of the coating.
