... synthetic heat-affected zone test 热影响区模拟试验 coarse-grained heat-affected zone 热影响区粗晶区 cracking of heat-affected zone 热影响区开裂 ...
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采用二维有限元数值方法分析了焊接热影响区粗晶区（CGHAZ）中局部硬化区（LHZ）的作用。
The effect of the local hard zone (LHZ) distributed in the coarse grained HAZ (CGHAZ) has been analyzed by 2-dimensional FEM on a mechanical model of the weld CGHAZ.
结果表明，细小弥散的第二相粒子能有效地阻碍焊接热影响区粗晶区的原奥氏体晶粒长大，改善该区域的韧性。
The results show that the dispersed second phase particles can effectively retard the growth of austenite grain in the CGHAZ, and improve the toughness.
进一步比较了断裂拉杆和已经产生裂纹的拉杆焊缝区的显微组织，发现在焊缝的热影响区粗晶区存在沿晶裂纹。
The fracture rod has cracks in the microstructure of weld zone, intergranular cracks exists in the coarse grain zone of the weld heat affected zone.
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