TY  - JOUR
TI  - Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite
AB  - The cryogenic treatment, known as holding materials at sub-zero temperatures, is a method usedto improve the properties of metal and non-metallic materials in recent years. This method ismainly applied to tool steels used in mold making. In our country, the use of cryogenic processescontinues to be widespread by many private sector organizations, primarily in mold materials.The benefits of this process have been recognized in many sectors, from the defense industry tothe automotive industry. In this study, the macro hardness, micro hardness and microstructureproperties of Sleipner cold work tool steel, which was applied traditional heat treatment and deepcryogenic process for 24 hours, were examined and the changes in the mechanical properties andmicrostructure of the material were determined. However, by measuring the residual stress andresidual austenite amounts in the materials with the X-Ray Diffraction (XRD) Method, thedifference between the samples was determined. The macro hardness of the CHT and DCT-24samples was measured as 60.96 HRC and 61.46 HRC, respectively. Micro hardness values were also measured as 734.26 HV and 761.83 HV, respectively. Deep cryogenic treatment increasedmacro and microhardness by 0.5 HRC and 27.57 HV, respectively. The amount of residualaustenite decreased by 36% after deep cryogenic treatment. Axial and circumferential residualstress values also decreased by 48.84% and 36.52%, respectively. As a result, deep cryogenictreatment increased the hardness of Sleipner cold work tool steel, homogenized themicrostructure, reduced residual austenite and residual stress values and provided positiveimprovements.
AU  - ÖZBEK, Onur
AU  - uygur, ilyas
AU  - KARA, Fuat
AU  - Altan Ozbek, Nursel
DO  - 10.30855/gmbd.2021.02.07
PY  - 2021
JO  - Gazi Mühendislik Bilimleri Dergisi
VL  - 7
IS  - 2
SN  - 2149-4916
SP  - 143
EP  - 151
DB  - TRDizin
UR  - http://search/yayin/detay/438935
ER  -