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李玉衡, 包芳涵. 低碳低合金调质钢焊接HAZ组织遗传性及其对韧性的影响[J]. 焊接学报, 1987, (4): 181-187.
引用本文: 李玉衡, 包芳涵. 低碳低合金调质钢焊接HAZ组织遗传性及其对韧性的影响[J]. 焊接学报, 1987, (4): 181-187.
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Li Yuheng, Bao Fanghan. STRUCTURAL HEREDITY IN WELD HAZ OF LOW-CARBON ALLOY Q AND T STEEL AND ITS EFFECT ON TOUGHNESS[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1987, (4): 181-187.
Citation: Li Yuheng, Bao Fanghan. STRUCTURAL HEREDITY IN WELD HAZ OF LOW-CARBON ALLOY Q AND T STEEL AND ITS EFFECT ON TOUGHNESS[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1987, (4): 181-187.
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低碳低合金调质钢焊接HAZ组织遗传性及其对韧性的影响

STRUCTURAL HEREDITY IN WELD HAZ OF LOW-CARBON ALLOY Q AND T STEEL AND ITS EFFECT ON TOUGHNESS

    摘要
  • 摘要: 本文研究了HQ70低碳低合金调质钢模拟多次焊接热循环条件下,HAZ组织与性能的关系。发现,HQ70钢过热区粗大非平衡组织,经第二次快速加热到正火区,并没有出现通常所认为的"细化品粒"现象,而是出现了"组织遗传"。组织遗传区温度大约在750~1050℃。组织遗传现象的出现,使得HAZ脆化更加严重。本文对脆化原因进行了分析讨论,并就如何改善组织遗传对韧性的影响进行了探讨。

     

    Abstract: The relationship between HAZ structure and properties of HQ70 low-carbon low-alloy Q and T steel under multiple weld thermal cycle simulating conditions was studied.It was discovered that structural heredity phenomenon took place in the non-equilibrium structure of overheated zone of HQ70 steel after another quick heating.The temperature range of structural heredity was found to be approximately 750~1050℃.Stuctural heredity worsened the embrittlement of HAZ overheated zone.The causes of embrittlement were analyzed and discussed,and the measures for improving the effect of structural heredity on toughness studied.

     

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