FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS
D2, D6 and Calmax cold work tool steels were heat treated in vacuum hardening, made grinding and plasma nitrided in 75% N2 + 25% H2 atmosphere at 450 °C for 12 h at 2 mbar. Characterization of samples has been carried out by means of surface roughness, microstructure, microhardness and wear-friction...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Bursa Uludag University
2020-04-01
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| Series: | Uludağ University Journal of The Faculty of Engineering |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/pub/uumfd/issue/52836/630430 |
| _version_ | 1828023177061597184 |
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| author | Hakan Aydın Ahmet Yılmaz |
| author_facet | Hakan Aydın Ahmet Yılmaz |
| author_sort | Hakan Aydın |
| collection | DOAJ |
| description | D2,
D6 and Calmax cold work tool steels were heat treated in vacuum hardening, made
grinding and plasma nitrided in 75% N2 + 25% H2
atmosphere at 450 °C for 12 h at 2 mbar.
Characterization of samples has been carried out by means of surface roughness,
microstructure, microhardness and wear-friction. Wear-friction characteristics
of samples have been investigated using a ball-on-disc tribosystem with a WC-Co ball.
Plasma nitriding increased the surface roughness of samples. However, this
effect was decreased with higher surface roughness of base metal. Fe4N
(γ'), Fe3N (ε) and CrN phases were obtained on the surfaces of
samples. Higher surface hardness was obtained in the plasma nitrided D2 and D6
steels. No significant mass loss was observed in the ball on-disc tribosystem. So,
the wear of samples was characterized
with the worn surfaces using a
scanning electron microscope (SEM). Plasma nitriding improved the wear
resistance and decreased the friction coefficient of steels. Plasma nitrided D2
steel showed the highest wear resistance, whereas plasma nitrided Calmax steel
exhibited the lowest wear resistance. However, plasma nitrided Calmax tool
steel had relatively lower friction coefficient than the other plasma nitrided
steels. In general, brittle layer fractures have determined the friction
coefficient. |
| first_indexed | 2024-04-10T12:22:15Z |
| format | Article |
| id | doaj.art-874ddbf76b634cd9bea68e9a873dde9f |
| institution | Directory Open Access Journal |
| issn | 2148-4147 2148-4155 |
| language | English |
| last_indexed | 2024-04-10T12:22:15Z |
| publishDate | 2020-04-01 |
| publisher | Bursa Uludag University |
| record_format | Article |
| series | Uludağ University Journal of The Faculty of Engineering |
| spelling | doaj.art-874ddbf76b634cd9bea68e9a873dde9f2023-02-15T16:15:22ZengBursa Uludag UniversityUludağ University Journal of The Faculty of Engineering2148-41472148-41552020-04-0125160962210.17482/uumfd.6304301779FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELSHakan Aydın0Ahmet Yılmaz1BURSA ULUDAĞ ÜNİVERSİTESİBURSA ULUDAĞ ÜNİVERSİTESİD2, D6 and Calmax cold work tool steels were heat treated in vacuum hardening, made grinding and plasma nitrided in 75% N2 + 25% H2 atmosphere at 450 °C for 12 h at 2 mbar. Characterization of samples has been carried out by means of surface roughness, microstructure, microhardness and wear-friction. Wear-friction characteristics of samples have been investigated using a ball-on-disc tribosystem with a WC-Co ball. Plasma nitriding increased the surface roughness of samples. However, this effect was decreased with higher surface roughness of base metal. Fe4N (γ'), Fe3N (ε) and CrN phases were obtained on the surfaces of samples. Higher surface hardness was obtained in the plasma nitrided D2 and D6 steels. No significant mass loss was observed in the ball on-disc tribosystem. So, the wear of samples was characterized with the worn surfaces using a scanning electron microscope (SEM). Plasma nitriding improved the wear resistance and decreased the friction coefficient of steels. Plasma nitrided D2 steel showed the highest wear resistance, whereas plasma nitrided Calmax steel exhibited the lowest wear resistance. However, plasma nitrided Calmax tool steel had relatively lower friction coefficient than the other plasma nitrided steels. In general, brittle layer fractures have determined the friction coefficient.https://dergipark.org.tr/tr/pub/uumfd/issue/52836/630430soğuk iş takım çelikleriplazma nitrürlememikrosertliksürtünme katsayısıaşınma yüzeyi karakterizasyonucold work tool steelsplasma nitridingmicrohardnessfriction coefficientwear surface characterization |
| spellingShingle | Hakan Aydın Ahmet Yılmaz FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS Uludağ University Journal of The Faculty of Engineering soğuk iş takım çelikleri plazma nitrürleme mikrosertlik sürtünme katsayısı aşınma yüzeyi karakterizasyonu cold work tool steels plasma nitriding microhardness friction coefficient wear surface characterization |
| title | FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS |
| title_full | FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS |
| title_fullStr | FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS |
| title_full_unstemmed | FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS |
| title_short | FRICTION-WEAR CHARACTERISTICS OF PLASMA NITRIDED COLD WORK TOOL STEELS |
| title_sort | friction wear characteristics of plasma nitrided cold work tool steels |
| topic | soğuk iş takım çelikleri plazma nitrürleme mikrosertlik sürtünme katsayısı aşınma yüzeyi karakterizasyonu cold work tool steels plasma nitriding microhardness friction coefficient wear surface characterization |
| url | https://dergipark.org.tr/tr/pub/uumfd/issue/52836/630430 |
| work_keys_str_mv | AT hakanaydın frictionwearcharacteristicsofplasmanitridedcoldworktoolsteels AT ahmetyılmaz frictionwearcharacteristicsofplasmanitridedcoldworktoolsteels |