prevention-od-deformation-during-heat-treatmentIn order to prevent unacceptable deformation duringheat treatment, a great deal of technical knowledge andexperience is necessary.The outer ring heatsup too quickly, theinner ring cools tooquickly, or the struts cool too quickly The inner ring heatsup too quickly or theouter ring cools tooquickly, or the strutsheat up too quicklyCrack growthDeformation