摘要
采用超音速火焰喷涂技术制备了硅酸盐玻璃涂层,通过扫描电镜、能谱、衍射和强度试验研究了涂层的组织特征、机械性能等.研究表明,制备玻璃涂层的最佳工艺为:粉末颗粒尺寸为25～50μm,氧气流量34～36m3/h,煤油流量13～14L/h,喷涂距离25cm;涂层组织较致密,玻璃涂层厚度可达到0.5mm以上;涂层基本呈非晶态,热喷涂后玻璃涂层冷却速度对涂层的析晶行为有一定影响;涂层与基体之间的结合形式为机械结合,涂层的内聚强度约为8MPa,其拉伸断裂形式为宏观脆性断裂,涂层具有一定硬度和抗冲击性能.
HVOF spray technology was used to prepare silicate glass coating on 45#steel substrate.Scanning electron microscope（SEM）,energy dispersive X-ray analysis（EDX）,X-ray diffraction（XRD） and strength test were employed to study the structure and component as well as mechanical performance of the glass coating.The result shows that the best technological parameters are that the size of powder is 25 ～50 μm,the fluxes of oxygen and kerosene are 34 ～36 m^3 /h and 13 ～14 L/h,the spraying distance is 25 cm.It is confirmed that the thickness of glass coating can be up to 0.5 mm.The coating structure is good and entirely non-crystalline.The behavior of crystallization is influenced by cooling velocity of coating after being sprayed.The bonding between glass coating and substrate is mainly mechanical bonding and the cohesion strength of glass coating and substrate is about 8 MPa.Tensile stress can result in macroscopically brittle fracture.The glass coating has the capability of resisting impact.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2010年第3期326-329,共4页
Materials Science and Technology
作者简介
E—mail：zhanjun-200@163．com;占君（1984-），男，博士生；
陈桂明（1966-），男，教授，博士生导师．
