... 热影响区 heat-affected zone (HAZ) 过热区 overheated zone 粗晶区 coarse grained region ...
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The tests prove that the working stress has little effect on the temper embrittlement of the coarse grained region.
试验还证明，工作应力对粗晶区回火脆性的影响不大。
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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