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Volume 31 Issue 6
Jun.  2024
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文章导航 >  矿物冶金与材料学报（英文）  > 2024  >  31(6): 1263-1284
Tingting Li and Jian Yang, Development in oxide metallurgy for improving the weldability of high-strength low-alloy steel—Combined deoxidizers and microalloying elements, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1263-1284. https://doi.org/10.1007/s12613-023-2754-y
Cite this article as:
Tingting Li and Jian Yang, Development in oxide metallurgy for improving the weldability of high-strength low-alloy steel—Combined deoxidizers and microalloying elements, Int. J. Miner. Metall. Mater., 31(2024), No. 6, pp. 1263-1284. https://doi.org/10.1007/s12613-023-2754-y
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特约综述

氧化物冶金技术提高高强度低合金钢焊接性的发展现状—结合脱氧剂和微合金化元素

  • 上海大学材料科学与工程学院，省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444, 中国


  • 通讯作者:

    杨健    E-mail: yang_jian@t.shu.edu.cn

文章亮点

  • (1) 系统阐明Ti、Mg、Ca、Zr 和稀土金属等脱氧剂对能够诱发针状铁素体形核的有效夹杂物的影响。
  • (2) 总结C、Si、Al、Nb、V、Cr、Mo 和 B 等微合金元素对氧化物冶金作用效果的影响，包括针状铁素体形核和热影响区析出物在焊接过程中的行为。
  • (3) 对氧化物冶金在实践中的发展进行了评估，并对今后工业发展和科学研究方向做出了总结
  • 氧化物冶金的作用机制包括两方面，一方面利用微米夹杂物诱导晶内针状铁素（IAF）形成，另一方面焊接过程中通过纳米析出钉扎原奥氏体晶粒（PAG）限制晶粒长大。结晶取向混乱的 IAF 和细化的PAG可抑制钢中裂纹的产生和扩展，从而提高冲击韧性。本文从氧化冶金的概念出发，总结在大线能量焊接过程脱氧元素和合金元素综合作用效果，希望对改善热影响区（HAZ）冲击韧性的相关研究和实践有所启发。Ti结合其他强脱氧剂（如 Mg、Ca、Zr 和稀土金属 (REM)）的复合脱氧能够通过细化PAG和提高IAF组织含量提高HAZ冲击韧性。然而，复合脱氧方式形成的有效夹杂物通常是多相的，很难确定诱导IAF形成的特定相。合金元素（如 C、Si、Al、Nb 或 Cr）含量的增加会降低HAZ韧性。C含量增加通常会增加粗碳化物的数量，降低IAF的形核效力。Si、Cr或Al的添加会导致不利于HAZ韧性的组织的形成。Nb则会降低析出物的高温稳定性。Mo、V 和 B 可提高 HAZ 韧性。含Mo的沉淀物具有良好的热稳定性。VN和V(C,N)晶体与铁素体具有良好的相干，可有效促进IAF形核。夹杂物周围贫B区的形成也能够促进IAF的形成。合金元素之间的相互作用非常复杂，添加不同合金元素的效果仍有待评估。未来，各种合金元素之间的相互作用及其对氧化物冶金的影响，以及利用第一性原理计算有效夹杂物的成核效应将成为氧化物冶金的重点。
    • Invited Review

    Development in oxide metallurgy for improving the weldability of high-strength low-alloy steel—Combined deoxidizers and microalloying elements

    + Author Affiliations
      Abstract
    • The mechanisms of oxide metallurgy include inducing the formation of intragranular acicular ferrite (IAF) using micron-sized inclusions and restricting the growth of prior austenite grains (PAGs) by nanosized particles during welding. The chaotically oriented IAF and refined PAGs inhibit crack initiation and propagation in the steel, resulting in high impact toughness. This work summarizes the combined effect of deoxidizers and alloying elements, with the aim to provide a new perspective for the research and practice related to improving the impact toughness of the heat affected zone (HAZ) during the high heat input welding. Ti complex deoxidation with other strong deoxidants, such as Mg, Ca, Zr, and rare earth metals (REMs), can improve the toughness of the heat-affected zone (HAZ) by refining PAGs or increasing IAF contents. However, it is difficult to identify the specific phase responsible for IAF nucleation because effective inclusions formed by complex deoxidation are usually multiphase. Increasing alloying elements, such as C, Si, Al, Nb, or Cr, contents can impair HAZ toughness. A high C content typically increases the number of coarse carbides and decreases the potency of IAF formation. Si, Cr, or Al addition leads to the formation of undesirable microstructures. Nb reduces the high-temperature stability of the precipitates. Mo, V, and B can enhance HAZ toughness. Mo-containing precipitates present good thermal stability. VN or V(C,N) is effective in promoting IAF nucleation due to its good coherent crystallographic relationship with ferrite. The formation of the B-depleted zone around the inclusion promotes IAF formation. The interactions between alloying elements are complex, and the effect of adding different alloying elements remains to be evaluated. In the future, the interactions between various alloying elements and their effects on oxide metallurgy, as well as the calculation of the nucleation effects of effective inclusions using first principles calculations will become the focus of oxide metallurgy.
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