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周志良, 刘书华. 焊后热处理对DQTHT80钢热影响区断裂韧性的影响[J]. 焊接学报, 1998, (1): 39-43.
引用本文: 周志良, 刘书华. 焊后热处理对DQTHT80钢热影响区断裂韧性的影响[J]. 焊接学报, 1998, (1): 39-43.
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Zhou Zhiliang, Liu Shuhua. Effect of PWHT on Fracture Toughness of HAZ in a DQTHT80 Steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1998, (1): 39-43.
Citation: Zhou Zhiliang, Liu Shuhua. Effect of PWHT on Fracture Toughness of HAZ in a DQTHT80 Steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1998, (1): 39-43.
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焊后热处理对DQTHT80钢热影响区断裂韧性的影响

Effect of PWHT on Fracture Toughness of HAZ in a DQTHT80 Steel

    摘要
  • 摘要: 研究了直接淬火回火调质钢DQTHT80多层焊热影响区的CTOD断裂韧性。焊态和焊后热处理状态下的试验结果表明:焊态下热影响区断裂韧性高于焊后热处理态。焊后热处理降低了该钢热影响区的断裂韧性。焊态下断口呈韧窝状,而焊后热处理断口呈解理状。模拟焊接热影响区粗晶区试验结果进一步证实了焊后热处理对韧性的不利影响。

     

    Abstract: In this paper, the fracture toughness properties of thick weldment on a quenched and tempered DQTHT80 steel was investigated.The testing results show that the post weld heat treatment (PWHT) deteriorates the toughnees of HAZ of the studied steel. Ductile fructure and cleavage fracture were observed respectively in HAZ for as-welede and post weld heat treated specimens. Moreover, the toughness drop after PWHT was proved by simulation tests on coarse grain zone.

     

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