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| 321/Qd370qD爆炸焊接界面渗碳体的微观结构 |
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王宇飞1, 张金民2, 岳宗洪2, 周浩2, 韩顺昌2, 宋琳3
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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
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| 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. |
| 关键词: 爆炸焊接 渗碳体 透射电镜 珠光体 |
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| Microstructure of cementite beside interface in 321/Qd370qD explosive welding |
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WANG Yufei1, ZHANG Jinmin2, YUE Zonghong2, ZHOU Hao2, HAN Shunchang2, SONG Lin3
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1.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China;2.Luoyang Ship Material Research Institute, Luoyang 471039, China;3.Scivic Engineering Corporation, Luoyang 471039, China
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| Abstract: |
| 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 [110]α as axis or with [002]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. |
| Key words: explosive welding cementite transmission electron microscopy pearlite |
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