Alan Denney
AKD Materials Consulting Ltd
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Mohd Siraj
Sent: 22 February 2016 09:22
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:24355] Impact Test & cooling Rate-Preheating (carbon steel)
Dear all,
Background:
impact testing is more critical for less(low)thickness than higher thickness.
Reason :
fine grain form during fast cooling and course grain form during slow cooling.
Question is:
Preheating use to lower the cooling rate for higher thickness.
So lower the cooling rate means form the course grain,course grain lower the toughness.
Preheating contributing to lower the toughness?
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