The results show that a certain extent, the other parameters constant, increasing power, increasing scanning speed, small grains become more dense;
结果表明：在一定范围内，其它工艺参数不变，增加功率，增大扫描速度，晶粒更趋致密细小；
Under the conditions of other technological parameters unchanged, the microstructure of the coatings becomes smaller and more homogeneous with laser scanning speed increasing.
在其他工艺参数不变的条件下，随扫描速度的增大，熔覆层组织变得细小、均匀；
Some pores appeared mainly near in the bond line, but porosity can be suppressed to a great extent by increasing welding speed or electron beam scanning.
结果表明，在保证试件完全焊透的情况下，降低电子束的线能量，可在一定程度上提高接头的强度；
Some pores appeared mainly near in the bond line, but porosity can be suppressed to a great extent by increasing welding speed or electron beam scanning.
结果表明，在保证试件完全焊透的情况下，降低电子束的线能量，可在一定程度上提高接头的强度；
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