Can rapid cooling after normalizing refine the grain structure?
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This post was last edited by 15837357920 on 2016-9-11 20:24. Many studies now indicate that rapid cooling after normalizing can refine the grain structure. Normalizing can refine the grain structure; shouldn’t rapid cooling have no effect on grain refinement? However, many still believe that rapid cooling refines the grains, and this is also what is stated in the literature. What is meant here is: with the same normalizing temperature and time, will the grain structure differ if the cooling method varies?
This post was last edited by wanlirn on 2016-9-11 09:08. “Normalizing can refine the grain structure; rapid cooling shouldn’t have any effect on grain refinement, right?” ” The original poster also admits that normalizing can refine the grain structure. The requirement for the normalizing process is to use rapid cooling; yet the second part of your statement questions this rapid cooling method, which is illogical. I don’t understand – what do you want to ask?
What is meant here is: with the same normalizing temperature and time, will the grain structure differ if the cooling method varies?
Rapid cooling is included in the normalizing process; changing the cooling method does not constitute normalizing
After normalizing: air cooling is possible, as is wind cooling, mist cooling, or even water cooling. The cooling rates are different. The cooling rate range for normalizing is quite wide. Any speed greater than the annealing temperature but less than the critical cooling rate can result in normalizing.