Tailoring of Thermophysical Properties of New TRIP/TWIP Steel Alloys to Optimize Gas Atomization

Korobeinikov, Iurii; Chaves, H.; Volkova, Olena

doi:10.1007/978-3-030-42603-3_3

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Furthermore, the results of the present study were compared with those of two other atomization series conducted on the same equipment [11,17] to estimate the effect of surface tension on the median particle size (see Figure 7). The highest d 50 reduction effect was observed for the case of only sulfur alloying of the steel.…”

Section: Resultsmentioning

confidence: 99%

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Modification of Liquid Steel Viscosity and Surface Tension for Inert Gas Atomization of Metal Powder

Korobeinikov

Perminov

Dubberstein

et al. 2021

Metals

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Inert gas atomization is one of the main sources for production of metal powder for powder metallurgy and additive manufacturing. The obtained final powder size distribution is controlled by various technological parameters: gas flow rate and pressure, liquid metal flow rate, gas type, temperature of spraying, configuration of nozzles, etc. This work explores another dimension of the atomization process control: modifications of the liquid metal properties and their effect on the obtained powder size. Series of double-alloyed Cr-Mn-Ni steels with sulfur and phosphorus were atomized with argon at 1600 °C. The results indicate that surface tension and viscosity modifications lead to yielding finer powder fractions. The obtained correlation is compared with the individual modification of surface tension with S and Se and modification of viscosity with phosphorus. Discrepancy of the results is discussed. Additives of surfactants and viscosity modifiers can be a useful measure for powder fractions control.

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Section: Resultsmentioning

confidence: 99%

“…Figure 7. Effect of surface tension on the median powder size d50 for the steels modified with selenium [17], sulfur [11] and sulfur with phosphorus. .…”

Section: Resultsmentioning

confidence: 99%

Modification of Liquid Steel Viscosity and Surface Tension for Inert Gas Atomization of Metal Powder

Korobeinikov

Perminov

Dubberstein

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

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Investigation of Sulfur Influence on the Atomization of Stainless Steels

Bartzsch,

Scherbring,

Richter

et al. 2024

steel research int.

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In this study, the alloying of stainless steels with various sulfur contents is investigated to obtain steel powders with significantly reduced mean diameters without changing the operational parameters of the atomizing unit. The steels are produced in a VIM12 furnace and atomized on a VIGA‐1B setup with high‐pressure argon. The desired reduction in the mean diameter is attributed to the decrease in surface tension with increasing sulfur content, which is in good agreement with previous findings. A transition from a positive to a negative thermal gradient of the surface tension is observed, along with a shift to higher temperatures with increasing sulphur concentration. In addition, the chemical assessment of the powders reveals a lower evaporation of manganese and a reduced increase in nitrogen content with increasing sulfur content. The sphericity and flowability are not affected by the addition of sulfur. Viscosity and density measurements are also conducted to characterize the steels thoroughly. Scanning electron microscopy reveals the presence of manganese sulfide, which was submicron in size and well distributed. Iron sulfides, mostly attributed to hot shortness, were not observed, which was also confirmed by thermodynamic modeling using Thermo‐Calc software.

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Tailoring of Thermophysical Properties of New TRIP/TWIP Steel Alloys to Optimize Gas Atomization

Cited by 2 publications

References 23 publications

Modification of Liquid Steel Viscosity and Surface Tension for Inert Gas Atomization of Metal Powder

Modification of Liquid Steel Viscosity and Surface Tension for Inert Gas Atomization of Metal Powder

Investigation of Sulfur Influence on the Atomization of Stainless Steels

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