退火温度对N08825/X52爆炸复合板界面组织与性能的影响  

Effect of annealing temperature on interface microstructure and properties of explosive welded N08825 / X52 bimetallic plate

作　　者：郝红梅[1,2] 武志红[1] 贾书君[2] 李拔[2] 刘清友[2] 

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055 [2]钢铁研究总院工程用钢研究所,北京100081

出　　处：《材料热处理学报》2016年第4期108-115,共8页Transactions of Materials and Heat Treatment

基　　金：国家科技支撑计划(2011BAE25B00)

摘　　要：采用光学显微镜、扫描电镜、能谱仪、X-射线衍射仪、显微硬度计及拉剪试验研究了退火温度对N08825/X52爆炸复合板界面组织和性能的影响。结果表明:随着退火温度的升高,界面X52侧显微组织逐渐发生回复再结晶;到580℃左右,界面X52侧组织开始发生再结晶,界面的硬化现象消失,界面附近显微硬度降到与X52基体同一水平。与热处理前相比,热处理后剪切强度降低缓慢。当退火温度小于580℃时,扩散层的γ-(Fe,Ni)固溶强化及结合区的塑性变形强化,导致界面结合强度较高,剪切试样全部在界面附近的X52基体处发生断裂,因此剪切强度基本未变;当加热温度高于580℃时,固溶强化幅度小于加工硬化消失引起的强度降低幅度,导致界面结合强度降低且剪切试样在波形结合界面处断裂。Effect of annealing treatment on the interface microstructure and properties of explosive welded N08825 / X52 bimetallic plate was studied by optical microscope（ OM）,scanning electron microscopy（ SEM）,energy dispersive spectrometer（ EDS） analysis,X-ray diffraction（ XRD）,micro-hardness test and tensile-shear test. The results show that the recovery and recrystallization gradually occur in the interface microstructure of X52 side as the annealing temperature increases. When annealing at 580 ℃,the recrystallization starts and the hardening of the interface disappears and the microhardness drops to the same level with X52 base material. Compared with the shear strength before the annealing heat treatment,the shear strength of the annealed plate slowly decreases as the treatment temperature increases. Annealing at 580 ℃ or below,the excellent bond strength is attributed to the solid solution hardening of γ-（ Fe,Ni） phase in the diffusion layer and the severe plastic deformation in the binding regions,which lead to the tensile-shear fracture occurring at the X52 steel and the shear strength keeps unchanged. Annealing at the temperature higher than 580 ℃,the work hardening effect disappears,which leads to a reduction of the bonding strength of the interface and the fracture occurring at the bonding interface.

关 键 词：爆炸焊接 N08825/X52复合板 退火 界面 力学性能 

分 类 号：TG456.6[金属学及工艺—焊接]