Abstract
Tungsten alloy with addition of rhenium and tantalum was prepared by laser sintering. Microstructure and properties of the samples were tested by optical microscope, X-ray diffractometer and microhardness tester. Dense tungsten alloy block materials were prepared by adjusting laser beam power and laser spot scanning speed. The oxidation of powder can be avoided by desorption and deoxygenation pretreatment and inert gas protection. Static recrystallization occurred in the laser sintering process.
Highlights
Tungsten and its alloys are widely used in aerospace, nuclear power, ships, automobiles, electronics, electrical, chemical and many other fields [1,2,3,4]
It can be seen from the figure that tungsten powder particles, which accounted for the absolute majority of mass and volume, had an isoaxial shape and a uniform particle size distribution
Tungsten-based alloys with tantalum and rhenium were prepared by laser sintering, and their structures and properties were tested
Summary
Tungsten and its alloys are widely used in aerospace, nuclear power, ships, automobiles, electronics, electrical, chemical and many other fields [1,2,3,4]. Tungsten belongs to rare metals, and the content of tungsten on the earth is only 0.001%. How to use tungsten with high quality has become the focus of new technology researches [5,6,7]. The research direction of developing high-grade tungsten products with high technology content and high added value includes deep cemented carbide manufacturing, high precision and high performance functionally gradient cemented carbide, alloy of precision die and wear-resistant parts, super-thin and super-large tungsten sheet, etc. Tantalum and rhenium are all high melting point metals. Tungsten has the highest melting point (3410 °C), followed by rhenium (3180 °C and tantalum (2995 °C).
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