• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>DVS-Berichte >The effect of nickel-plated surfaces on the microstructure and strength of vacuum brazed nickel maraging steel
【24h】

The effect of nickel-plated surfaces on the microstructure and strength of vacuum brazed nickel maraging steel

机译：镀镍表面对真空钎焊镍钢微观结构和强度的影响

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

Nickel maraging steels are high-alloy and precipitation hardenable tool steels with excellent strength, hardness, and toughness properties. These steel grades are primarily used for tools exposed to high stresses, such as hydraulic chucks or injection molds, with an integrated complex channel structure to pressurize or cool the tool. Within this context, vacuum brazing of segmented parts is a promising manufacturing process that offers the advantage of combining the heat treatment of the base material with the joining process. Although it is known that nickel-plated surfaces ensure the wettability and improve the strength of such joints, a basic metallurgic understanding of these effects is yet still missing. Thus, this research focuses on the investigation of miscellaneous silver-based brazing alloys for non-plated and nickel-plated surfaces of material grade AISI 18MAR300 (1.2709). It is shown that the improved joint strength of nickel-plated samples is related to the formation of Ag(Cu) and Cu(Ni, Fe, Ag) phases instead of eutectic and Cu(Ag) phases as for non-plated surfaces. In case of the plated samples, the joint strength increased with a reduced presence of Ag(Cu) phases in the center of the joint. In addition, palladium was identified as a key element to strengthen this phase by forming an Ag(Cu, Pd) solid solution, which enables to obtain a maximum tensile strength of 654 MPa by using AgCu27Pd5 as a brazing alloy.
机译：镍覆盖钢是高合金和沉淀可硬化的工具钢，具有优异的强度，硬度和韧性。这些钢等级主要用于暴露于高应力的工具，例如液压夹头或注塑模具，其中集成的复杂通道结构加压或冷却工具。在这种情况下，分段部件的真空钎焊是一种有前途的制造过程，其提供了将基材与连接过程结合的优点。虽然已知镀镍表面确保润湿性和提高这种关节的强度，但对这些效果的基本冶金理解仍然缺失。因此，本研究侧重于研究材料级AISI 18MAR300（1.2709）的非镀镀镍表面和镀镍表面的杂项银钎焊合金。结果表明，镀镍样品的改善的关节强度与Ag（Cu）和Cu（Ni，Fe，Ag）相的形成而不是对非镀表面的共晶和Cu（Ag）相的形成。在电镀样品的情况下，关节强度的增加随着关节中心的Ag（Cu）相的降低而增加。此外，通过形成Ag（Cu，Pd）固溶体来鉴定为键元以通过使用AgCu27PD5作为钎焊合金来加强该相位的关键元件以加强该相。

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