Laplanche diagram

This diagram (Fig. 1) represents the cast ironstructure (s. Structure formation of cast iron) as a function of the carbon and silicone content of the alloy, similar to the Maurer diagram.

The course of the boundary lines is determined by a factor which captures the tendency for graphitization (s. Graphitization) and whose interdependence with the carbon and silicone content can be expressed by a mathematic formula (eq. 1):

Eq. 1:  



The individual boundary lines of the structure fields correspond to different factor values.

Table 1
shows how the factors are changed by different cooling conditions.

  • Table 1: K values for the boundary lines of the structure fields in the Laplanche diagram
  • Bild 1: Laplanche diagram
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