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.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第10期86-88,共3页
Transactions of The China Welding Institution
关键词
爆炸焊接
渗碳体
透射电镜
珠光体
explosive welding
cementite
transmission electron microscopy
pearlite
