The results show that the fusion zone is metallurgical bonding.
结果表明，沉积层和基材为冶金结合。
The difference exists in hardness at various places in fusion zone.
焊缝区不同部位的硬度存在一定差异。
Objective To observe the structure alloyage in the fusion zone of different metals welded by laser.
目的观察不同金属之间焊接后熔焊区组织合金化情况。
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