321/Qd370qD爆炸焊接界面渗碳体的微观结构  

Microstructure of cementite beside interface in 321/Qd370qD explosive welding

作　　者：王宇飞[1] 张金民[2] 岳宗洪[2] 周浩[2] 韩顺昌[2] 宋琳 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]洛阳船舶材料研究所,河南洛阳471039 [3]机械工业第四设计院,河南洛阳471039

出　　处：《焊接学报》2009年第10期86-88,共3页Transactions of The China Welding Institution

摘　　要：利用透射电镜研究了321/Qd370qD爆炸焊接界面附近渗碳体的微观结构.结果表明,321/Qd370qD爆炸焊接界面奥氏体侧存在大量渗碳体,近界面处的渗碳体内存在大量亚片层,尺寸约几个纳米.这些亚片层相互平行,有的亚片层团互相交叉大约呈70.5°,亚片层团之间符合一定的晶体学取向关系,即相互之间满足绕[110]α方向旋转180°后或者绕[002]α方向旋转180°后相重合.如果在一个亚片层团的附近按上述关系生长出新的亚片层团,则其更容易形核与长大,且受阻力最小.相邻亚片层的晶体学取向关系可以推测应用到相邻珠光体团上,相邻珠光体团可能存在以上关系.Cementite near the interface in 321/Qd370qD explosive welding is analyzed by transmission electron microscopy.The results show that there is a lot of cementite in austenitic side of the interface,and a lot of sub-lamellae exist in the cementite beside the interface.These sub-lamellae are about several nanometers and parallel each other.Some sub-lamella groups cross approximately 70.5° and accord with definite crystal tropism relation,which coincide each other when they circumrotate 180° with α as axis or with α as axis. Thus,a new sub-lamella group can easily grow beside another sub-lamella group.The crystal tropism relation of adjacent sub-lamellae may be applied to adjacent pearlite groups that maybe exist the above relation.

关 键 词：爆炸焊接 渗碳体 透射电镜 珠光体 

分 类 号：TG456.6[金属学及工艺—焊接]