• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Symposium on Rapid Prototyping Technologies Dec 3-5, 2002 Boston, Massachusetts, U.S.A. >Cold Gas Dynamic Manufacturing -A new approach to Near-Net Shape Metal Component Fabrication
【24h】

Cold Gas Dynamic Manufacturing -A new approach to Near-Net Shape Metal Component Fabrication

机译：冷气动态制造-一种近净成形金属零件制造的新方法

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

Cold Gas Dynamic Manufacturing (CGDM) is a high-rate, direct deposition process capable of combining many dissimilar materials in the production of a single component. The process is based on Cold Gas Dynamic Spraying (CGDS) - a surface coating technology in which small, un-heated particles are accelerated to high velocities (typically above 500 m/s) in a supersonic gas jet and directed towards a substrate material. The process does not use a heat source (as with similar plasma and HVOF spray technologies), but rather employs the high kinetic energy of the particles to effect bonding through plastic deformation upon impact with the substrate or previously deposited layer. As a consequence it lends itself to the processing of temperature sensitive material systems such as oxidising, phase-sensitive or nano-structured materials. To achieve metallic bonding incident particles require velocities greater than a certain material-specific threshold value, such that thin surface films are ruptured, generating a direct interface. This bonding mechanism has been compared to explosive welding. This paper discusses the further development of the CGDS technique from surface coating technology into the basis for a novel Additive Fabrication process. The description of the apparatus is presented in addition to the basic processing conditions for the deposition of aluminium material. Particular attention is paid to the morphology of the deposited material, the microstructure and the interfacial boundary between splats.
机译：冷气动态制造（CGDM）是一种高速，直接沉积的工艺，能够在单个组件的生产中结合许多不同的材料。该工艺基于冷气体动态喷涂（CGDS），这是一种表面涂层技术，其中，未加热的小颗粒在超音速气体射流中被加速至高速（通常高于500 m / s）并指向基材。该方法不使用热源（与类似的等离子和HVOF喷涂技术一样），而是利用颗粒的高动能在与基材或先前沉积的层碰撞时通过塑性变形实现粘合。结果，它适合于对温度敏感的材料系统的处理，例如氧化，相敏感或纳米结构的材料。为了实现金属键合，入射粒子需要大于特定材料特定阈值的速度，以使薄膜表面破裂，从而产生直接界面。已经将这种结合机制与爆炸焊接进行了比较。本文讨论了CGDS技术从表面涂层技术到新型添加剂制造工艺的基础的进一步发展。除了用于沉积铝材料的基本工艺条件外，还对设备进行了说明。特别要注意沉积材料的形态，微结构和小片之间的界面边界。

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