• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Different Behavior in Electron Beam Welding of 18 Ni Co-free Maraging Steels
【24h】

Different Behavior in Electron Beam Welding of 18 Ni Co-free Maraging Steels

机译：18 Ni无钴马氏体时效钢在电子束焊接中的行为不同

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

Microstructures of two different 18 Ni Co-free maraging specimens A and B and their electron beam (EB) weld joints were investigated comparatively by optical microscopy and scanning electron microscopy (SEM). It is shown that both of the steels are typical lath martensite; however, grain size of specimen A is about three times as large as that of specimen B. X-ray diffraction (XRD) reveals that the amount of the reverted austenitic phase in A is obviously less than that in B. Most of the austenite distributes in plate form along grain and lath boundaries while some of it distributes as fine particles within the matrix. The microstructural differences between the two specimens led to diverse behaviors in EB welding. The specimen A is weldable but B shows obvious welding defects of pits and burn-through holes in weld face. The welding microstructure exhibits a typical dendritic morphology, and the grains in the heat-affected zone recrystallized and grew because of high temperatures of welding EB. The weldablity of the examined materials is related to the microstructure characteristics that markedly affected thermal conduction performance.
机译：通过光学显微镜和扫描电子显微镜（SEM）对两种不同的18种无Ni无钴马氏体试样A和B及其电子束（EB）焊接接头的显微结构进行了比较研究。结果表明，两种钢都是典型的板条马氏体。然而，试样A的晶粒尺寸大约是试样B的三倍。X射线衍射（XRD）显示，A中回复奥氏体相的数量明显少于B中的奥氏体相。大多数奥氏体分布呈板状，沿晶粒和板条边界，而其中一些以细颗粒的形式分布在基体内。两个样品之间的微观结构差异导致了EB焊接的不同行为。试样A是可焊接的，但试样B在焊缝表面有明显的凹坑和烧穿孔焊接缺陷。焊接组织表现出典型的枝晶形态，并且由于焊接EB的高温，热影响区的晶粒重新结晶并生长。被检查材料的可焊性与显着影响导热性能的微观结构特征有关。

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