Manganese Modification of the Fe-S-O System

Hilty, D. C.; Crafts, Walter

doi:10.1007/bf03398328

Cited by 3 publications

(2 citation statements)

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“…Increasing the oxygen content conduce to type II sulfide convert into type I sulfide, according to Oikawa et al calculation. Hilty and Crafts have investigated the impact of oxygen on the phase diagram of Fe−Mn–S system via experiments. Consequently, the change of oxygen content leads to modify the Fe–Mn–S ternary phase diagram, which has a tremendous impact on the precipitation of manganese sulfide.…”

Section: Resultsmentioning

confidence: 99%

The Formation and Growth of Sulfides in Free‐Cutting Stainless Steel

Sui

Wang

et al. 2018

steel research int.

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The effect of oxygen content on the manganese sulfide in the process of cooling and heat treatment is studied. The experimental results show that the changes of oxygen content have a great effect on the formation and growth of sulfide in free-cutting steel. And the morphology of sulfides transforms from Type II to type I in cooling process with the increase of oxygen content contribute to the formation of some oxides during initial solidification stage, which results in the formation of MnS from eutectic reaction to monotectic reaction. Oxygen content has a great effect on nucleation through decreasing nucleation work, increasing the oxygen content helps heterogeneous nucleation process. In slow cooling and heat treatment process, with the increase of oxygen content, sulfide inclusion coarsening rate is increasing and size of inclusion is remarkably magnifying, using Ostwald ripening theory.

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Section: Resultsmentioning

confidence: 99%

The Formation and Growth of Sulfides in Free‐Cutting Stainless Steel

Sui

Wang

et al. 2018

steel research int.

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“…Sims [6,12] investigated the relationship between oxygen content and type Ⅰ MnS inclusions and proposed that increasing oxygen content decreased the solubility of sulfur and increased the interface tension of sulfur enrich phase, favored to form type Ⅰ MnS inclusions. Hilty and Crafts [13] generated some quantitative data on the Fe-Mn-S-O system, and Dahl [8] proposed a model formation based on a pseudo-ternary Fe-MnS-MnO phase diagram and thought that type Ⅰ MnS inclusions were formed through the secondary precipitation of low melting slag (inclusion) droplets containing Mn, Fe, O and S due to segregation in the interdendritic regions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Aluminum on the Divorced Eutectic Transformation of MnS Inclusions

Xia

Fan

et al. 2021

Metall Mater Trans B

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The mechanical properties of steels are deteriorated by the formation of type II sulfides inclusions. The addition of alloying elements Al, C and Si are generally considered to promote the type II to Ⅲ transition. However, the functional mechanism of those alloying elements, especially Al, is still unclear. In this work, both experimental and calculation techniques were used to investigate the effect of aluminum on the divorced eutectic transformation of MnS inclusions. The research results showed that the sulfides were mostly typeⅡMnS in the specimens A, B and C. The sulfides in the specimens D, E and F were type Ⅲ MnS. The increase of aluminum content favored to convert sulfides morphology from the typeⅡto typeⅢ, but increasing cooling rate could have the opposite effect. Increasing Al content had little influence on the activity coefficient of S, precipitation temperature, initial S content in liquid steel and solid fraction of the precipitation of MnS, but it could significantly affect the equilibrium dissolved oxygen content and surface tension. MnS was the non-nucleating phase in Fe-MnS system. High Al content could increase the interface energy between the liquid steel and MnS and promote the divorced eutectic transformation of MnS and form type Ⅲ MnS .

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