热循环对喷瓷管道瓷层/金属界面的影响  

INFLUENCE OF THERMAL CYCLES ON THE STEEL-ENAMEL INTERFACE OF SPRAYED PORCELAIN PIPE

作　　者：王勇 张文钺[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《天津大学学报》2000年第2期159-161,共3页Journal of Tianjin University(Science and Technology)

基　　金：山东省自然科学基金资助项目 !(Y95F0 376) .

摘　　要：采用焊接热模拟、扫描电镜、电子探针等方法研究了热循环对瓷层 /金属界面的影响 .结果表明 ,加热前瓷层与金属之间形成过渡层 ,基体金属以岛状和桥状与瓷层连接 ,铁、镍等元素在界面发生富集 ,瓷层与金属密着良好 .加热峰值温度为 135 0℃、12 0 0℃和 95 0℃时 ,喷瓷层发生重熔 ,界面过渡层中岛状基体金属溶解 ,铁的富集消失 ,镍仍产生富集 ,界面结合良好 .峰值温度为 70 0℃时 ,喷瓷层没有发生熔化 ,界面形貌及元素分布无明显变化 。The influence of thermal cycles on the steel enamel interface is investigated by weld thermal simulation,SEM and EMS.The results show that a transition layer forms between the enamel and steel before heating,which has nickel and iron rich islands in contact with the enamel.It plays a very important role in the good adhesion of the coating to the substrate.After heating at a peak temperature of 1350 ℃、1200 ℃ and 950 ℃ respectively the enamel coating has been remelted,and a new transition layer forms in the steel enamel interface which consists of elements Fe,Ni and O.Only nickel accumulates at the transition zone,but there are no nickel and iron rich islands.At 700 ℃,many micro cracks between the enamel coating and the base although the interface image and the element concentration profile have no obvious change.

关 键 词：喷瓷管道 焊接热模拟 瓷层/金属界面 热循环 

分 类 号：U173.1[交通运输工程]