• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Improvement of impact toughness of AWS E6010 weld metal by adding TiO_2 nanoparticles to the electrode coating
【24h】

Improvement of impact toughness of AWS E6010 weld metal by adding TiO_2 nanoparticles to the electrode coating

机译：通过在电极涂层中添加TiO_2纳米颗粒来提高AWS E6010焊接金属的冲击韧性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effect of TiO_2 nanoparticles in the electrode coating on the impact toughness of three weld metals prepared by the shielded metal arc welding process was investigated and the main factors affecting the impact toughness were discussed. The microstructure, mechanical properties and fracture surface morphology of the weld metals have been evaluated and the results are compared. When the content of TiO_2 nanoparticles in the composition of electrode coating is increased, the morphology of ferrite in the microstructure of columnar zone will change from Widmanstatten ferrite to acicular ferrite. This finally changes to allotriomorphic ferrite when the amount of TiO_2 nanoparticles in the electrode coating goes relatively high. Furthermore, the addition of TiO_2 nanoparticles is effective in refining the ferrite grain size of the reheated microstructures of weld metals. This effect is attributed to the increased number of nucleation sites on the oxide nanoparticles. The impact toughness of the weld metal was improved by adding TiO_2 nanoparticles, especially when a medium TiO_2 nanoparticle content was used in the electrode coating. A significant increase in the impact toughness of weld metal was shown to be due to the increased percentage of acicular ferrite and refinement of microstructure.
机译：研究了电极涂层中的TiO_2纳米粒子对采用屏蔽金属电弧焊工艺制备的三种焊缝金属的冲击韧性的影响，并探讨了影响冲击韧性的主要因素。对焊缝金属的显微组织，力学性能和断裂表面形态进行了评估，并对结果进行了比较。随着电极涂层组成中TiO_2纳米颗粒含量的增加，柱状区组织中的铁素体形态将从Widmanstatten铁素体变为针状铁素体。当电极涂层中TiO_2纳米粒子的数量相对较高时，这最终变为同质亚铁素体。此外，TiO 2纳米颗粒的添加有效地细化了焊接金属的再加热组织的铁素体晶粒尺寸。该效应归因于氧化物纳米颗粒上成核位点数量的增加。通过添加TiO_2纳米颗粒可以改善焊接金属的冲击韧性，尤其是当在电极涂层中使用中等含量的TiO_2纳米颗粒时。焊缝金属冲击韧性的显着提高是由于针状铁素体百分比的增加和组织的细化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号