碳钢黄铜中间层不锈钢液固相扩散结合区组织  

Microstructure of liquid and solid diffusion bonding region of carbon steel-brass interlayer-stainless steel

作　　者：陈汝淑[1] 张锋刚[1] 刘德义[1] 刘世程[1] 

机构地区：[1]大连交通大学材料科学与工程学院,大连116028

出　　处：《焊接学报》2009年第4期61-64,共4页Transactions of The China Welding Institution

基　　金：辽宁省教育厅攻关项目(202033216)

摘　　要：用扫描电镜组织观察、能谱微区成分分析、X射线衍射等方法,研究了20钢—液相H62黄铜—304不锈钢液固相扩散结合区的组织.结果表明,通过碳钢、不锈钢与黄铜液相中间层的液固相扩散,低碳钢与不锈钢可以获得良好的冶金结合;在黄铜/不锈钢界面,液相黄铜中Cu,Zn原子沿固相晶界的扩散比较显著,形成网状黄铜包围奥氏体晶粒的组织;在碳钢/黄铜界面,固相向液相中的溶解比较明显,形成岛状富铁相分布于黄铜基体的组织;富铁相中含有较多的Cr和Ni元素,冷至室温仍为奥氏体.Microstructure of the liquid and solid diffusion bonding region of low carbon steel-H62 brass interlayer-304 stainless steel was examined by means of scanning electron microscope(SEM),energy dispersive X-ray detector(EDX) and X-ray diffractometer(XRD).Metallurgical bonding of carbon steel with stainless steel was achieved through liquid and solid diffusion at carbon steel-brass-stainless steel interfaces.Cu and Zn atoms in the liquid brass diffused through the brass/stainless interface notably,and the formed austenite was surrounded by reticulated brass.On the other hand,solid phase dissolution predominated at carbon steel/brass interface.A kind of island-form iron-rich phase,which contains chromium and nickel,was formed and distributed in brass matrix.And the iron-rich phase remained austenite when cooling to room temperature.

关 键 词：不锈钢/碳钢 黄铜中间层 液固相扩散 结合区 富铁相 

分 类 号：TG409[金属学及工艺—焊接]