The optimal technological parameter was obtained by laser cladding experiment and metallographic structure analysis.
通过熔覆试验和金相组织分析，获得了最佳工艺参数。
The fracture of blades made of a directionally solidified superalloy was analyzed. The failure mode and cause were studied in virtue of fracture observation and metallographic structure analysis.
对定向凝固合金叶片的断裂故障进行了分析，在断口观察与金相组织分析的基础上，对叶片的失效模式与失效原因进行了研究，并提出了预防该类故障发生的措施。
With electron microscope the fracture surface and metallographic structure analysis is done for typical sample of Q235, Q345 plate of low elongation, its reason found out, some Suggestions proposed.
用电镜对邯钢Q 235, Q 345中板伸长率低的典型试样进行了断口、金相组织分析，找出了试样断后伸长率低的原因，提出了相应的改进建议。
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