Abstract Components produced by additive manufacturing (AM) exhibit a heterogeneous microstructure, hence results in anisotropic mechanical properties. There are very limited studies available on thermo-physical properties variation in relation to the deposition orientation. Variation in these properties may result in an uneven stress distribution. In this work, thermo-physical properties of H13 tool steel fabricated by selective laser melting (SLM) process were experimentally investigated. The effect of three deposition directions (vertical, horizontal and 45° to base plane of build platform) on thermal expansion, thermal diffusivity, specific heat, thermal conductivity and simplified CCT diagram was studied. Additionally, mechanical properties and metallographic studies of the microstructure were carried out together with the porosity evaluation measurements across the specimens.

中文翻译：

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SLM 沉积 H13 钢与沉积取向相关的热物理性能研究

摘要 增材制造 (AM) 生产的部件具有异质微观结构，因此会产生各向异性的机械性能。关于与沉积方向相关的热物理特性变化的研究非常有限。这些特性的变化可能导致应力分布不均匀。在这项工作中，通过实验研究了通过选择性激光熔化 (SLM) 工艺制造的 H13 工具钢的热物理性能。研究了三个沉积方向（垂直、水平和与构建平台的基面成 45°）对热膨胀、热扩散率、比热、热导率和简化 CCT 图的影响。此外，