Mike Lamkin, our Technical Manager for Induction Furnaces, briefly explains his take on this subject and gives us an insight into the technical reasons behind it.
A change in temperature of an article, especially one with uneven dimensions, can result in thermal shock; the faster the change in temperature or the greater the degree of the change the higher the risk of developing a thermal shock crack. Hence an operator can reduce the risk of thermal shock by a natural or controlled cool. Covering the furnace as it naturally cools will slow the cool and be of benefit. A fast, forced air (or even water spraying) will likely result in thermal shock cracks developing.
Posted: 14 December 2023