Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite

ÖZBEK, Onur; uygur, ilyas; KARA, Fuat; Altan Ozbek, Nursel

doi:10.30855/gmbd.2021.02.07

Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite

Fuat KARA, (Düzce Üniversitesi, Makine Mühendisliği Bölümü, Düzce, Türkiye)

İlyas UYGUR, (Düzce Üniversitesi, Makine Mühendisliği Bölümü, Düzce, Türkiye)

Onur ÖZBEK, (Düzce Üniversitesi, Gümüşova Meslek Yüksekokulu, Makine ve Metal Teknolojileri Bölümü, Düzce, Türkiye)

Nursel ALTAN ÖZBEK (Düzce Üniversitesi, Cumayeri Meslek Yüksekokulu, Makine ve Metal Teknolojileri Bölümü, Düzce, Türkiye)

Gazi Mühendislik Bilimleri Dergisi

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Yıl: 2021 Cilt: 7 Sayı: 2 Sayfa Aralığı: 143 - 151 Metin Dili: İngilizce DOI: 10.30855/gmbd.2021.02.07 İndeks Tarihi: 29-07-2022

Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite

Öz:

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.

Anahtar Kelime: Sleipner Residual Stress Retained Austenite Cyrogenic Treatment

Derin Kriyojenik İşlemin Kalıntı Gerilme ve Kalıntı Östenit Üzerindeki Etkisinin Araştırılması

Öz:

Sıfırın altındaki sıcaklıklarda malzemelerin bekletilmesi olarak bilinen kriyojenik işlem, son yıllarda metal ve metal olmayan malzemelerin özelliklerini iyileştirmek için uygulanan bir yöntemdir. Bu yöntem daha çok kalıp yapımında kullanılan takım çelikleri için uygulanmaktadır. Ülkemizde, birçok özel sektör kuruluşu tarafından öncelikle kalıp malzemeleri olmak üzere birçok üründe kriyojenik işlem kullanımı yaygınlaşmaya devam etmektedir. Savunma sanayiinden otomotiv sanayiine kadar birçok sektörde bu işlemin faydaları kabul görmüştür. Bu çalışmada, geleneksel ısıl işlem uygulanmış (CHT) ve 24 saat derin kriyojenik işlem uygulanmış (DCT-24) Sleipner soğuk iş takım çeliğinin makro sertlik, mikro sertlik ve mikroyapı özellikleri incelenerek, malzemenin mekanik özellikleri ve mikroyapısındaki değişimler tespit edilmiştir. Bununla birlikte, X-Işını Kırınımı (XRD) Yöntemi ile malzemelerdeki kalıntı gerilme ve kalıntı östenit miktarları ölçülerek, numuneler arasındaki fark belirlenmiştir. CHT ve DCT-24 numunelerinin makro sertliği sırasıyla 60,96 HRC ve 61,46 HRC olarak ölçülmüştür. Mikro sertlik değerleri de sırasıyla 734,26 HV ve 761,83 HV olarak ölçülmüştür. Derin kriyojenik işlem makro ve mikro sertliği sırasıyla 0,5 HRC ve 27,57 HV arttırmıştır. Kalıntı östenit miktarı derin kriyojenik işlemden sonra % 36 oranında düşmüştür. Eksenel ve çevresel kalıntı gerilme değerleri de sırasıyla % 48,84 ve % 36,52 oranında düşmüştür. Sonuç olarak derin kriyojenik işlem Sleipner soğuk iş takım çeliğinin sertliği arttırmış, mikroyapıyı homojenleştirmiş, kalıntı östenit ve kalıntı gerilme değerlerini düşürerek olumlu iyileşmeler sağlamıştır.

Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	KARA F, uygur i, ÖZBEK O, Altan Ozbek N (2021). Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. , 143 - 151. 10.30855/gmbd.2021.02.07
Chicago	KARA Fuat,uygur ilyas,ÖZBEK Onur,Altan Ozbek Nursel Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. (2021): 143 - 151. 10.30855/gmbd.2021.02.07
MLA	KARA Fuat,uygur ilyas,ÖZBEK Onur,Altan Ozbek Nursel Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. , 2021, ss.143 - 151. 10.30855/gmbd.2021.02.07
AMA	KARA F,uygur i,ÖZBEK O,Altan Ozbek N Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. . 2021; 143 - 151. 10.30855/gmbd.2021.02.07
Vancouver	KARA F,uygur i,ÖZBEK O,Altan Ozbek N Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. . 2021; 143 - 151. 10.30855/gmbd.2021.02.07
IEEE	KARA F,uygur i,ÖZBEK O,Altan Ozbek N "Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite." , ss.143 - 151, 2021. 10.30855/gmbd.2021.02.07
ISNAD	KARA, Fuat vd. "Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite". (2021), 143-151. https://doi.org/10.30855/gmbd.2021.02.07

APA	KARA F, uygur i, ÖZBEK O, Altan Ozbek N (2021). Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. Gazi Mühendislik Bilimleri Dergisi, 7(2), 143 - 151. 10.30855/gmbd.2021.02.07
Chicago	KARA Fuat,uygur ilyas,ÖZBEK Onur,Altan Ozbek Nursel Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. Gazi Mühendislik Bilimleri Dergisi 7, no.2 (2021): 143 - 151. 10.30855/gmbd.2021.02.07
MLA	KARA Fuat,uygur ilyas,ÖZBEK Onur,Altan Ozbek Nursel Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. Gazi Mühendislik Bilimleri Dergisi, vol.7, no.2, 2021, ss.143 - 151. 10.30855/gmbd.2021.02.07
AMA	KARA F,uygur i,ÖZBEK O,Altan Ozbek N Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. Gazi Mühendislik Bilimleri Dergisi. 2021; 7(2): 143 - 151. 10.30855/gmbd.2021.02.07
Vancouver	KARA F,uygur i,ÖZBEK O,Altan Ozbek N Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite. Gazi Mühendislik Bilimleri Dergisi. 2021; 7(2): 143 - 151. 10.30855/gmbd.2021.02.07
IEEE	KARA F,uygur i,ÖZBEK O,Altan Ozbek N "Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite." Gazi Mühendislik Bilimleri Dergisi, 7, ss.143 - 151, 2021. 10.30855/gmbd.2021.02.07
ISNAD	KARA, Fuat vd. "Investigation of the Effect of Deep Cryogenic Process on Residual Stress and Residual Austenite". Gazi Mühendislik Bilimleri Dergisi 7/2 (2021), 143-151. https://doi.org/10.30855/gmbd.2021.02.07