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The solubility of Ca in Mn melt and the third‐element interaction effects
Author(s) -
Wei Shoukun,
Ni Ruiming,
Ma Zhongting,
Cheng Wu
Publication year - 1989
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198901683
Subject(s) - solubility , metallurgy , materials science , thermodynamics , chemistry , physics
Solubility experiments of Ca in Mn melt were carried out in a Mo‐wire‐heated furnace. Small CaO crucibles, charged with the Mn alloys with small amount of Ca chips on top, were placed in an iron crucible, its lid being tightly sealed under red‐hot conditions. Relation of the solubility of Ca in pure Mn with temperature was formulated between 1 250 and 1 380°C. The effects of 3rd elements upon the solubility of Ca in Mn at 1 350°C were studied. Diagram showing the relation of Ig f j Ca with [% j ] ( j = Si, Cr, Ni, Fe, Al, C and Ca) was drawn and e j Ca evaluated. With the formula of Wagner, In γ Ca 0 and ε Ca Ca were found by regression analysis from the experimental data. The standard free energy of solution of Ca in Mn, based on the 1 wt.% standard at 1350°C was calculated, and its relation with T estimated.