Bohler W360 Steel

Steel name: Bohler W360
Diagram No.: 5155
Type of diagram: CCT
Chemical composition in weight %: 0.50% C, 0.20% Si, 0.25% Mn, 4.50% Cr, 3.00% Mo, 0.55% V
Steel group: Hot work tool steels
Note: To calculate the kinetic of phase transformation of heating (transformation to austenite) the diagram of continuous heating (CHT) is used. Whereas to determine the phase transformations in the cooling process the new defined diagram of continuous cooling (CCT) for the higher temperature of austenitization (offset CCT diagram) are taken into account (Fig. 2). The offset of the diagram to the left side, in reference to the original graph (Fig. 1), is the result of the changes in method of CCT diagram analysis. It was assumed that the start point of cooling curve is in the point of intersection of the two lines - cooling curve and the temperature line in 800oC. In this way can avoid, in the simulation of the kinetic of cooling transformations, the offset all lines on the CCT diagram for the different heating temperatures.
Reference: Not shown in this demo version.

Transformation Diagrams

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Figure 1: The Continuous Cooling Transformation diagram (CCT) for the hot-work tool steel . Click the image to enlarge the diagram.

-25155-2 Figure 2: The Continuous Cooling Transformation diagram (CHT) and shifted CCT diagram with marked cooling rate for the hot-work tool steel W360. Click the image to enlarge the diagram.

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