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首页> 外文会议>TMS annual meeting exhibition >The Influence of Gas Cooling in Context of Wire Arc Additive Manufacturing-A Novel Strategy of Affecting Grain Structure and Size
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The Influence of Gas Cooling in Context of Wire Arc Additive Manufacturing-A Novel Strategy of Affecting Grain Structure and Size

机译：电弧增材制造中气体冷却的影响-一种影响晶粒结构和尺寸的新策略

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The continuous building process in additive manufacturing with gas metal arc welding (GMAW) provides the main advantage of a decreased processing time but leads to a high heat input in the built work piece. Especially geometrically small parts are affected by a coarse and constantly growing grain structure throughout the continuous reheating process. A novel approach of influencing the temperature-time regime during the additive manufacturing process is an application of additional cooling gas. Experimental trials with argon, hydrogen and nitrogen were carried out and analyzed by means of thermal imaging, hardness measurement and microscopy. The experimental results showed a significant influence of cooling gases on the temperature during the building process. Hence, grain structure and size can be modeled to a homogeneous microstructure by the composition of the gas.
机译：具有气金属弧焊（GMAW）的加性制造中的连续建筑工程提供了减少处理时间的主要优点，但导致建造工件中的高热量输入。特别是几何小部分受到整个连续再加热过程中粗糙和不断增长的晶粒结构的影响。影响添加剂制造过程中的温度时制度的新方法是施加额外的冷却气体。通过热成像，硬度测量和显微镜进行和分析具有氩气，氢和氮的实验试验。实验结果表明，在建筑工程期间的冷却气体对温度的显着影响。因此，通过气体的组成，晶粒结构和尺寸可以被建模给均匀的微观结构。

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