The Effect of Mechanical Properties and the Cutting Parameters on Machinability of AISI 5140 Steel Cooled at High Cooling Rates After Hot Forging

Barış ÖZLÜ; Halil DEMİR; Mustafa TÜRKMEN

doi:https://doi.org/10.2339/politeknik.479345

Makale detayları

The Effect of Mechanical Properties and the Cutting Parameters on Machinability of AISI 5140 Steel Cooled at High Cooling Rates After Hot Forging

Yazarlar:

Barış ÖZLÜ | Halil DEMİR | Mustafa TÜRKMEN

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Journal of Polytechnic 2019 Vol.22 Issue 4, pp.879-887

Belge Tipi:

Makale

Yayın Tarihi:

11/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000589921

Sıklık:

Aylık

eISSN:

2147-9429

DOI:

https://doi.org/10.2339/politeknik.479345

Özet:

 


In this study, the effect of mechanical properties and cutting
parameters (Cp) on the machinability of AISI 5140 steel cooled at high cooling
rates after hot forging was investigated. The microstructural examinations and
hardness measurements of the as-received AISI 5140 steel and the workpieces
cooled in the oil and polymerized water after hot forging were performed. Turning
process was conducted by using a coated ceramic tool at five different cutting
speeds (Vc) (120, 150, 180, 210, and 240 m/min), four different feed rates (fn)
(0.04, 0.08, 0.12, and 0.16 mm/rev), and four different depths of cut (ap)
(0.4, 0.6, 0.8, and 1 mm) under dry machining conditions. SEM examinations of
the cutting tools were also performed. It was seen from the results that the
changing microstructure and hardness values had a significant effect on cutting
forces (Fc) and surface roughness (Ra) from the Cp depending on cooling rate.
While the highest Fc were reached in the workpiece with the highest hardness
cooled in the polymerized water after hot forging,
the lowest surface roughness (Ra) was obtained in the same workpiece.



.

 


In this study, the effect of mechanical properties and cutting
parameters (Cp) on the machinability of AISI 5140 steel cooled at high cooling
rates after hot forging was investigated. The microstructural examinations and
hardness measurements of the as-received AISI 5140 steel and the workpieces
cooled in the oil and polymerized water after hot forging were performed. Turning
process was conducted by using a coated ceramic tool at five different cutting
speeds (Vc) (120, 150, 180, 210, and 240 m/min), four different feed rates (fn)
(0.04, 0.08, 0.12, and 0.16 mm/rev), and four different depths of cut (ap)
(0.4, 0.6, 0.8, and 1 mm) under dry machining conditions. SEM examinations of
the cutting tools were also performed. It was seen from the results that the
changing microstructure and hardness values had a significant effect on cutting
forces (Fc) and surface roughness (Ra) from the Cp depending on cooling rate.
While the highest Fc were reached in the workpiece with the highest hardness
cooled in the polymerized water after hot forging,
the lowest surface roughness (Ra) was obtained in the same workpiece.



.

Makale detayları

The Effect of Mechanical Properties and the Cutting Parameters on Machinability of AISI 5140 Steel Cooled at High Cooling Rates After Hot Forging

Yazarlar: Barış ÖZLÜ | Halil DEMİR | Mustafa TÜRKMEN

Yayıncı: Gazi University

Ana Başlıklar: Uygulamalı fizik

Dergi: Journal of Polytechnic 2019 Vol.22 Issue 4, pp.879-887

Belge Tipi: Makale

Yayın Tarihi: 11/2019

Belge Dili: İngilizce

Document ID (Org No.): 2000589921

Sıklık: Aylık

eISSN: 2147-9429

DOI: https://doi.org/10.2339/politeknik.479345

Sayı

Yazarlar:

Barış ÖZLÜ | Halil DEMİR | Mustafa TÜRKMEN

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Journal of Polytechnic 2019 Vol.22 Issue 4, pp.879-887

Belge Tipi:

Makale

Yayın Tarihi:

11/2019

Belge Dili:

İngilizce

Document ID (Org No.):

2000589921

Sıklık:

Aylık

eISSN:

2147-9429

DOI:

https://doi.org/10.2339/politeknik.479345