welding coarse grained region
welding coarse grained region
焊接粗粒区
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The toughness of weld metal is the highest while the coarse grained region in the HAZ is the lowest because of welding thermal cycle and formation of brittle microstructure.
试验钢由针状铁素体和少量块状铁素体组成，焊缝为典型的针状铁素体组织，焊接热影响区粗晶区以粒状贝氏体为主。
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