Mould Flux

Name: Mould Flux
Diagram No.: 1129
Type of diagram: TTT
Chemical composition in weight %: See the table
Group: Slags
Note: The TTT diagrams for the mould fluxes A, B, C and D constructed with SHTT measurements are presented in Figures 4, 5, 6 and 7 respectively. The construction of the TTT diagram for the mould flux A was the most difficult one as the repeatability of the results was poor compared to the other measured mould fluxes, since the scatter is high. In the Figure 4 the results from the samples where incubation times were shortest at are presented. Due the poor repeatability of the measurements with the mould flux A the conclusions made from the TTT diagram for this mould flux have to be made with some consideration.
In the Figure 8 is presented the average values of individual TTT diagrams in Figures 4, 5, 6 and 7 in one graph and it shows the differences in crystallization tendency between the different mould fluxes A, B, C and D. Based on the incubation times the mould flux C has the highest tendency to crystallize at temperatures above 1025 C. It also has the widest measured temperature rage (between 950 1200 C) where the crystals are formed. On the opposed side is the mould flux D, which had the longest incubation times and shortest temperature rage. The mould fluxes A and B behaved similarly as regarding the crystallization behaviour and temperature range. The main difference between fluxes A and B is the mould flux Bs tendency to form crystals at lower temperatures. At temperatures below 1025 C the crystallization of mould flux B is fastest. With the mould fluxes A, B and C the two C-shaped curves can been seen at the TTT diagram. Based on previous research the two Cs are an indication of formation of two different types of crystals. With the mould flux D only one C can be observed at the TTT diagram with average incubation times but the Figure 7 shows scattering in the results at temperatures above 1100 C and the presence of second C cannot be completely ruled out.
Reference: Not shown in this demo version.

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