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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Influence of Zr on Toughness of HAZ for Ultra High Strength Low Carbon Banite Steel
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Influence of Zr on Toughness of HAZ for Ultra High Strength Low Carbon Banite Steel

机译：Zr对超高强度低碳贝氏体钢热影响区韧性的影响

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The effect of Zr on the toughness of HAZ for ultra high strength low carbon steel has been investigated in the experiment. The research results show that Zr can improve the toughness of HAZ obviously, and the toughness can keep a higher level even at 100KJ/cm welding heat input. This phenomenon can be explained by the role of Zr as following: 1) ZrO_2+MnS compound is formed with nuclei of ZrO_2, and MDZ formation improves the IGF nucleation. 2) The austenite grain is divided by the IGF and the microstructure is refined, which improves the impact toughness in the CGHAZ. And most probably 3 ) ZrO_2+TiN compound can be formed with nuclei of ZrO_2 in the processing and may hinder grain growth in the CGHAZ.
机译：实验研究了Zr对超高强度低碳钢HAZ韧性的影响。研究结果表明，Zr可以明显提高HAZ的韧性，即使在100KJ / cm的焊接热输入下，其韧性也可以保持较高的水平。这种现象可以通过Zr的作用来解释：1）ZrO_2 + MnS化合物与ZrO_2的核形成，而MDZ的形成改善了IGF的成核作用。 2）将奥氏体晶粒除以IGF并细化组织，从而提高了CGHAZ的冲击韧性。最有可能3）ZrO_2 + TiN化合物在加工过程中与ZrO_2的核形成，并可能阻碍CGHAZ中的晶粒长大。

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