SGER: Laser Aided Direct Metal Deposition of Three- Dimensional Components: Dimension, Microstructure and Mechanical Properties

邮编：9633108 Mazumder 这项探索性研究小额资助将研究通过激光辅助直接金属沉积（LADMD）工艺由H13工具钢制成的部件的表面光洁度、尺寸精度和残余应力。 这种新的快速成型技术的创新是通过工具钢的直接金属沉积来制造。 这使得可以通过沉积而不是去除方法来生产工具，例如模具和模具。 对于那些使用这种技术的模具来说，关键问题是模具的尺寸精度和残余应力状态，因为它们会影响模具的寿命和由其生产的部件的配合。模具制造中的另一个问题是表面光洁度，这是大多数分层制造技术的薄弱环节。但是表面光洁度对于部件的外观和材料在模具或模腔中的流动是重要的。 该项目将通过使用LADMD生产和测量标准快速原型测试零件，提供尺寸精度，表面光洁度和残余应力的实验数据。 材料评估将与Doehler Jervis和DCD技术公司合作进行，这些公司制造和使用模具。 这种新方法的影响将是减少需要特殊工具的生产部件的制造时间，从而产生更具竞争力的定制产品，以满足客户需求。

DMI-9633108 Mazumder This Small Grant for Exploratory Research will investigate the surface finish, dimensional accuracy and residual stress in components made of H13 tool steel by a process called Laser Aided Direct Metal Deposition (LADMD). The innovation in this new approach to rapid prototyping technology is fabrication by direct metal deposition of tool steel. This makes it possible to produce tooling, for example, dies and molds, by deposition rather than removal methods. Key questions for those using this technology for tooling are the dimensional accuracy and residual stress state of tooling, because of their affect on the life of the tooling and fit of components produced by it. Another issue in die and mold manufacture is surface finish, a place where most of the layered manufacturing technologies are weak, but surface finish is important to the appearance of components and flow of material in a die or mold cavity. This project will provide experimental data on dimensional accuracy, surface finish, and residual stress, by producing and measuring a standard rapid prototyping test part using LADMD. Materials evaluation will be done in cooperation with Doehler Jervis and DCD Technology, firms that make and use dies. The impact of this new approach will be reductions in lead-time for the manufacture of production parts that need special tooling, leading to more competitive and customized products to satisfy customer needs.