研究目的
Investigating the additive manufacturing of tool steel by laser metal deposition to produce crack-free parts with specific microstructure and hardness properties.
研究成果
Laser metal deposition can produce crack-free thin-walled parts from hot work tool steel 1.2344, with inhomogeneous microstructure and hardness due to intrinsic heat treatment. The build direction should account for local strength properties, or additional heat treatments may be necessary.
研究不足
The study focused on thin-walled specimens and may not fully represent the behavior of more complex geometries. The cooling rates and microstructure analysis are specific to the used parameters and materials.
1：Experimental Design and Method Selection:
The study used laser metal deposition (LMD) with a 4 kW Trumpf HL 4006D Nd:YAG laser and a continuous coaxial powder nozzle from Fraunhofer ILT.
2：Sample Selection and Data Sources:
A spherical
3：2344 powder with particle size between 50 μm and 100 μm was used. Substrate material was construction steel S235JR. List of Experimental Equipment and Materials:
Equipment included a Trumpf HL 4006D Nd:YAG laser, Fraunhofer ILT powder nozzle, and type K thermocouples. Materials included
4：2344 powder and S235JR substrate. Experimental Procedures and Operational Workflow:
Thin wall structures were created with specific laser power and feed rates. Temperature measurements were conducted during deposition.
5：Data Analysis Methods:
Metallographic testing, hardness measurements, and electron-beam microanalysis were used to analyze the microstructure and hardness of the parts.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
