Phase diagram problems.
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Phase diagrams reflect the relationships between phases during equilibrium crystallization, but most actual crystallization occurs under non-equilibrium conditions; so how can phase diagrams be made to correspond to the actual crystallization process?
Could you explain it in more detail? Haven’t heard of it yet? Asked for advice
Which place are you referring to? I’ve never heard of it before; I’m very interested. Could you explain it in more detail?
Reply to 3# hnjycgyl001: Doesn’t a phase diagram reflect the equilibrium crystallization process? Balanced crystallization, on the other hand, is crystallization under extremely slow cooling conditions. In actual production, the cooling rate must be accelerated, which results in unbalanced crystallization. Analyzing crystallization under actual unbalanced conditions from the perspective of equilibrium on a phase diagram is bound to lead to errors. What I want to ask is, what considerations should be taken into account when developing hot working processes, in order to avoid making mistakes by simply following what’s written in books.
-- But in actual production, a certain margin is usually left in accordance with the idealized balanced model, right? --
Reply to 5# FILTRATION-MAN: So what is this margin?
What you want to ask is how to use equilibrium phase diagrams to guide the development of actual heat treatment processes, right? It mainly comes down to the issue of supercooling; in my opinion, phase diagrams alone are not sufficient. The development of actual processes requires the use of other information such as CCC diagrams or CCT diagrams, as well as consideration of existing production experience. Only by continuously summarizing these insights can a good process be developed. I’m not sure if this will be useful to you; it’s just my humble opinion!