• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>DVS-Berichte >Influence of Gap Clearance on Brazing Joint Strength for Ni- and Fe-base Filler Metals for Brazing Ferritic Stainless Steels
【24h】

Influence of Gap Clearance on Brazing Joint Strength for Ni- and Fe-base Filler Metals for Brazing Ferritic Stainless Steels

机译：用于钎焊铁氧体不锈钢钎焊金属钎焊金属钎焊剂的影响

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

Ferritic stainless steels are gaining increasing interest for brazed components due to the combination of low cost, low thermal expansion and good high temperature scaling resistance, compared to the commonly used austenitic stainless steels. As a continuation of our recent work on the effect of gap clearance on joint strength for austenitic stainless steels, the same effect has been studied for ferritic stainless steels. Due to differences in diffusivity of elements in ferritic stainless steels compared to austenitic stainless steels, the data from austenitic stainless steels cannot easily be extrapolated to ferritic stainless steels. In this investigation, AISI 430 butt-joint specimens were brazed with different nominal gap clearances ranging up to 300μm, and the effect on the joint tensile strength was measured. The common Ni-base brazing filler metals BNi-2, BNi-5, BNi-7, Ni613 and Hoganas iron-base brazing filler metal BrazeLet F300 was tested. The gap clearance effect on joint microstructure was evaluated by metallographic analysis. The joints brazed with Ni-base fillers have a significant strength increase at low gap clearances, which is attributed to changes in the joint microstructure. At large gap clearances, the fracture propagated along the brittle centreline eutectic. At gap clearances low enough to eliminate these brittle centreline eutectics, the fracture propagated along the filler-metal / base-metal interface. The joint strength variation with gap clearance for the ferritic stainless steels is different from the austenitic stainless steels tested previously. This is attributed to differences in the diffusivity of the melting point depressant elements in the filler metals. Joints brazed with Ni613 as well as Hoganas' iron-based alloy BrazeLet F300 were not sensitive to variations in the gap clearance.
机译：与常用的奥氏体不锈钢相比，铁素体不锈钢由于低成本，低热膨胀和良好的高温缩放电阻而增加，钎焊部件越来越令人利益。作为我们最近对奥氏体不锈钢关节强度影响的延续工作的延续，已经研究了铁素体不锈钢的相同效果。由于与奥氏体不锈钢相比，铁素体不锈钢元件的差异差异，来自奥氏体不锈钢的数据不能容易地推断成铁素体不锈钢。在该研究中，AISI 430对接 - 关节标本被钎焊，不同的标称间隙间隙，范围高达300μm，并测量对关节拉伸强度的影响。测试常见的Ni-Base钎料填充金属BNI-2，BNI-5，BNI-7，Ni613和Hoganas铁基钎料填料F300。通过金相分析评价了对关节微观结构的差距效应。钎焊Ni-基础填料的关节在低间隙间隙下具有显着的强度增加，这归因于关节微观结构的变化。在较大的间隙间隙，骨折沿脆性中心线共晶繁殖。在间隙间隙足够低以消除这些脆性中心线共肠，裂缝沿填料 - 金属/贱金属界面传播。用于铁素体不锈钢的间隙间隙的关节强度变化与先前测试的奥氏体不锈钢的不同。这归因于填充金属中的熔点抑制元件的扩散性的差异。用NI613钎焊的关节以及霍加纳斯的铁基合金炸弹F300对间隙间隙的变化不敏感。

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