Mold Fluxes for High-Al Non-magnetic Steel

Name: Mold Fluxes for High-Al Non-magnetic Steel
Diagram No.: 984
Type of diagram: TTT
Chemical composition in weight %: See the table
Group: Slags
Note: TTT diagrams of mold fluxes (a) R2, (b) R4, (c) R41 and (d) R43.
TTT diagrams shown in Fig. summarize the crystallization time during isothermal tests. The label 5% represents the 5% volume fraction of crystallization and is viewed as the start of crystallization. Similarly, 95% represents the end of crystallization. It could be seen that all TTT diagrams other than R43 appear to be typical C-shaped curve. Two noses shown in TTT diagram of R43 indicates it may have two crystallization processes. The TTT diagrams also suggest the following:1) mold flux R4 crystallizes at the highest start crystallization temperature 1 275C, 2) mold flux R41 and R43 have lower start crystallization temperatures at 1250C and 1175C, respectively, 3) mold flux R2 has the lowest start crystallization temperature at 1025C. Similarly, mold fluxes R4, R41, R43 and R2 express gradually decreasing nose temperature, which are about 1 200C, 1150C, 1100C, and 1000C, respectively. In addition, Figs. (a) through (d) indicate mold fluxes with highest crystallization temperature or nose temperature also have the shortest full-crystallization time (from initial crystallization to completion) at nose temperature, which further indicates the strongest crystallization ability of mold flux R4.
Reference: Not shown in this demo version.

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