Electron beam scanning method, refractory metal component and electron beam selective melting equipment

Abstract

The embodiment of the invention relates to an electron beam scanning method, a refractory metal component and electron beam selective melting equipment. The electron beam scanning method includes: receiving electron beam scanning path data, the scanning path data is generated according to the slice data planning of the workpiece model to be processed, including different first scanning paths and second scanning paths; , performing the first electron beam melting scan according to the first scan path for each layer of powdered metal powder layer, and then performing the second electron beam melting scan according to the second scan path. In this embodiment, two different scanning paths are used to scan the metal powder layer by electron beam selective melting. On the one hand, the thermal stress distribution is more uniform, and it is not easy to cause warping and deformation at the part level; on the other hand, the metal powder layer passes through two consecutive Sub-electron beam selective melting scanning can improve the defects of poor fusion of part layers to a certain extent.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of additive manufacturing, and in particular to an electron beam scanning method, a refractory metal component, and electron beam selective melting equipment. Background technique [0002] High melting point metals with a melting point higher than 1650°C, such as tungsten, tantalum, molybdenum, niobium, hafnium, chromium, vanadium, zirconium and titanium, tungsten, etc., and alloys formed by adding other elements based on these metals are called refractory metals. [0003] Before the mid-1940s, refractory products were mainly produced by powder metallurgy. From the late 1940s to the early 1960s, due to the development of aerospace technology and atomic energy technology, the application of metallurgical technologies such as consumable electric arc furnaces and electron bombardment furnaces promoted the use of refractory metals that can be heated at 1093-2360 °C or higher. Development o...

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Problems solved by technology

Due to the very low scanning speed in the melting stage, the local temperature gradient of the cross-section of the part to be melted becomes relatively large, so the fused part on the surface of the part to be melted and the powder to be fused are very prone to warping deformation, which leads to the failure of the entire preparation process or There are serious internal defects and other problems

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