W9Mo3Cr4V-45钢摩擦焊近缝区不良组织及其对质量的影响  

HARMFUL STRUCTURE IN ADJACENT-WELD ZONE OF W9Mo3Cr4V-45 STEEL WELDED JOINT BY FRICTION WELDING AND ITS INFLUENCE ON THE QUALITY

作　　者：周振华[1] 李军[1] 霍颜秋[1] 陆晓锋[1] 

机构地区：[1]长春工业大学材料科学与工程学院,130012

出　　处：《焊接》2003年第6期30-32,共3页Welding & Joining

摘　　要：对W 9Mo3Cr4V高速钢 (4 5mm热轧棒料 ,摩擦焊接直径分别为4 0mm与2 0mm)与 4 5钢进行摩擦焊接 ,焊后进行退火 ,淬火 ,回火。并用光学显微镜和扫描电镜对焊件近缝区进行观察。结果表明 ,在4 0mm的高速钢近缝区存在过热组织和少量的莱氏体 ,这是由于摩擦线速度过大和钢内碳化物偏析较为严重所致 ,退火和淬火均无法消除。当淬火温度较高时 。W9Mo3Cr4V high speed steel(HSS)( 45 mm heat rolling bars with friction diameters of 40 mm and 20 mm) was friction welded to 45 steel, and followed by annealing, quenching and tempering. The structure in the adjacent-weld zone was examined with optical and scanning electronic microscope. The results showed that in the adjacent-weld zone of the 40 mm HSS, overheated structure and a small amount of ledeburite were found. These were considered to be formed under too high friction linear speed and comparatively serious carbide segregation in the side of HSS. The harmful structure could not be eliminated by annealing and quenching, and when the quenching temperature is comparatively high, it tends to crack in the adjacent-weld zone along the weld.

关 键 词：高速钢 摩擦焊 热处理 过热组织 莱氏体 质量 光学显微镜 扫描电镜 淬火 退火 

分 类 号：TG457.11[金属学及工艺—焊接] TG453.9