The effect of deep cryogenic treatment on mechanical properties of 80CrMo12 5 tool steel
(ندگان)پدیدآور
Amini, K.Nategh, S.Shafyei, A.Rezaeian, A.نوع مدرک
TextResearch Paper
زبان مدرک
Englishچکیده
Cryogenic treatment can be used as a supplemental treatment that is performed on some tool steels between quenching and tempering as an effective method for decreasing retained austenite and increasing wear resistance. In this research, the effect of deep cryogenic treatment (DCT) on dimensional stability and mechanical properties of 80CrMo12 5 tool steel was investigated. The martensitic transformation start and finish temperatures were also studied using dilatometry tests. The results show that the start and finish temperatures of the martensitic transformation are 254°C and - 87°C, respectively. The hardness increases (untempered) by 3 HRC after DCT. Thus, to decrease or eliminate the amount of retained austenite, cryogenic treatment is necessary. In DCT, impact energy and hardness at all tempering temperatures decreases and increases, respectively. Tempering transformations investigation using dilatometry tests, verified that the DCT increases dimensional stability. This is attributed to the transformation of retained austenite to martensite.
کلید واژگان
Martensitic transformationImpact energy
Hardness
Deep cryogenic treatment
Dimensional stability
شماره نشریه
2تاریخ نشر
2010-12-011389-09-10
ناشر
Iron & Steel Society of Iranانجمن آهن و فولاد ایران
سازمان پدید آورنده
Department of Materials Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, IranDepartment of Materials Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, Iran
Department of Materials Engineering , Isfahan University of Technology, Isfahan, Iran
Department of Materials Engineering , Isfahan University of Technology, Isfahan, Iran