Abstract
Hızla gelişen polimer endüstrisinde kullanılan ekstrüder vidalar prosesin en önemli mekanik elemanlarıdır. Proses sürecinde vida üzerinde zaman içerisinde abrasiv ve adhezif aşınma nedenli problemler artmakta, bu durum proses verimliliğini önemli ölçüde düşürmektedir. Çok çeşitli yüzey işlem ve kaplama teknikleri ile yeni veya aşınmış iş parçalarının yüzeylerinin korunması, yüzey direncinin artırılması, parçanın boyut tolerans sınırlarına ulaştırılması ve tamiri mümkündür. Vida yüzeylerinin aşınma direncinin artırılması amacı ile çeşitli ısıl işlem ve kaplama teknikleri uygulanmaktadır. Uygulanan yüzey işlem ve kaplama teknikleri yüksek ısı girdisi nedeni ile altlık malzemenin mikroyapısal özelliklerini etkilemekte kaplamanın yüzeyden dökülmesine neden olabilmekte ve aşınma direnci zayıflamaktadır. Bu sebeple bu çalışmada daha düşük ısıl girdi ile sağlanabilecek termal sprey kaplama tekniği ile Krom oksit esaslı kaplama kompozisyonunu gerekli koşullarda üretilmiş ve ısıl işlem uygulanmıştır. Üretilen kaplamalar ile günümüzde hali hazırda kullanılan 4140 nitrasyon çeliği ısıl işlemli ve ısıl işlemsiz olmak üzere ASTM G65 Aşınma testine, Sertlik Ölçümlerine ve Mikroskobik incelemelere tabii tutulmuşlardır. Yapılan testler sonrası elde edilen sonuçlarda 4140 çeliğinde hacimce 85,96 mm3 aşınma kaybı gözlemlenirken, oksit esaslı Cr2O3 kaplamasının ısıl işlem görmüş hali hacimce kütle kaybı 6,76 mm3 olarak gözlenmiştir.
Keywords
Supporting Institution
STANDARD PROFİL ve TUBİTAK
Project Number
1139B411601028
Thanks
Bu çalışma TUBİTAK 2209-B Sanayiye Yönelik Lisans Araştırma Programı Destekleme Programı tarafından 1139B411601028 nolu proje kapsamında desteklenmiştir. Bu projede Sanayici tarafında bize destek sağlayan Düzce’de faaliyetlerini sürdüren STANDARD PROFİL firmasına teşekkürü borç biliriz.
References
- A. Kulkarni, A. Vaidya, A. Goland, S. Sampath, H. Herman, Processing effects on porosity-property correlations in plasma-sprayed yttriastabilized zirconia coatings, Mater. Sci. Eng. A 359 (2003) 100– 111.
- Ferrari, D.; Extrusion Coating Resins – Troubleshooting, TAPPI PLC Conference, 2000.
- G. Bolelli,V. Cannillo, L. Lusvarghi, S. Ricc`o, Mechanical and tribological properties of electrolytic hard chrome and HVOF-sprayed coatings, Surf. Coat. Technol. 200 (2006) 2995–3009.
- Guagliano M., “Fatigue failure of a bar of a twin-screw extruder for plastics”, Engineering Failure Analysis 12 (2005) 950–962
- Song, E.P., Ahn, J., Lee, S., Kim, N.J., Effects of critical plasma spray parameter and spray distance on wear resistance of Al2O3-8 wt.%TiO2 coatings plasma-sprayed with nanopowders, Surface and Coatings Technology 202, 2008, 3625-3632.
- Handbook of Thermal Spray Technology, ASM International, Materials Park, OH, USA, p. 171.
- Heimann, R.B., Plasma-spray coating, VCH, New York, 1996.
- J.D. Gates, Two-body and three-body abrasion: a critical discussion,Wear 214 (1998) 139–146.
- K. Sugiyama, S. Nakahama, S. Hattori, K. Nakano, Slurry wear and cavitation erosion of thermal-sprayed cermets, Wear 258 (2005) 768–775.
- Q.Yang,T. Senda, A. Ohmori, Effect of carbide grain size on microstructure and sliding wear behaviour of HVOF-sprayed WC–12%Co coatings,Wear 254 (2003) 23–34.
- R.B. Heimann, Applications of plasma-sprayed ceramic coatings,Key Eng. Mater. 122–124 (1996) 399–442.
- R.Westergard, L.C. Erickson, N. Ax´en, H.M.Hawthorne, S. Hogmark, The erosion and abrasion characteristics of alumina coatings plasma-sprayed under different spraying conditions, Tribol. Int. 31 (1998) 271–279.
- S. Guessasma, M. Bounazef, P. Nardin, T. Sahraoui, Wear behavior of alumina–titania coatings,analysis of process and parameters, Ceram. Int. 32 (2006) 13–19.
- Sulzer-Metco web site, http://www.sulzermetco.com.
- Sun, Y., Li, B., Yang, D., Wang, T., Sasaki, Y., Ishii, K., Unlubricated friction and wear behaviour of zirconia ceramics, Wear 215, 1998, 232-236.
- Wagner, J. R. Jr; Handbook of Troubleshooting Plastic Processes: A Practical Guide, John Wiley and Sons, 2012
- Y. Xie, H.M. Hawthorne, Wear mechanism of plasma-sprayed alümina coating in sliding contacts with harder asperities, Wear 225–229 (1999) 90–103.
Abstract
Extruder screws used in the rapidly developing polymer industry are the most important mechanical elements of the process. During the process, problems caused by abrasive and adhesive wear increase over time on the screw, which significantly reduces process efficiency. With various surface treatment and coating techniques, it is possible to protect the surfaces of new or worn work pieces, increase the surface resistance, reach the size tolerance limits and repair. Various heat treatment and coating techniques are applied to increase the wear resistance of the screw surfaces. The applied surface treatment and coating techniques affect the microstructural properties of the substrate material due to high heat input, causing the coating to be poured from the surface and its wear resistance is weakened. For this reason, in this study, chrome oxide based coating composition was produced under necessary conditions and thermal treatment was applied with the thermal spray coating technique that can be provided with lower thermal input. 4140 nitration steel, which is currently used with the coatings produced, has been subjected to ASTM G65 Abrasion test, Hardness Measurements and Microscopic examinations, with and without heat treatment. n the results obtained after the tests, a wear loss of 85.96 mm3 in volume was observed in 4140 steel, while the heat treatment of oxide-based Cr2O3 coating was observed as mass loss in volume of 6.76 mm3.
Keywords
Project Number
1139B411601028
References
- A. Kulkarni, A. Vaidya, A. Goland, S. Sampath, H. Herman, Processing effects on porosity-property correlations in plasma-sprayed yttriastabilized zirconia coatings, Mater. Sci. Eng. A 359 (2003) 100– 111.
- Ferrari, D.; Extrusion Coating Resins – Troubleshooting, TAPPI PLC Conference, 2000.
- G. Bolelli,V. Cannillo, L. Lusvarghi, S. Ricc`o, Mechanical and tribological properties of electrolytic hard chrome and HVOF-sprayed coatings, Surf. Coat. Technol. 200 (2006) 2995–3009.
- Guagliano M., “Fatigue failure of a bar of a twin-screw extruder for plastics”, Engineering Failure Analysis 12 (2005) 950–962
- Song, E.P., Ahn, J., Lee, S., Kim, N.J., Effects of critical plasma spray parameter and spray distance on wear resistance of Al2O3-8 wt.%TiO2 coatings plasma-sprayed with nanopowders, Surface and Coatings Technology 202, 2008, 3625-3632.
- Handbook of Thermal Spray Technology, ASM International, Materials Park, OH, USA, p. 171.
- Heimann, R.B., Plasma-spray coating, VCH, New York, 1996.
- J.D. Gates, Two-body and three-body abrasion: a critical discussion,Wear 214 (1998) 139–146.
- K. Sugiyama, S. Nakahama, S. Hattori, K. Nakano, Slurry wear and cavitation erosion of thermal-sprayed cermets, Wear 258 (2005) 768–775.
- Q.Yang,T. Senda, A. Ohmori, Effect of carbide grain size on microstructure and sliding wear behaviour of HVOF-sprayed WC–12%Co coatings,Wear 254 (2003) 23–34.
- R.B. Heimann, Applications of plasma-sprayed ceramic coatings,Key Eng. Mater. 122–124 (1996) 399–442.
- R.Westergard, L.C. Erickson, N. Ax´en, H.M.Hawthorne, S. Hogmark, The erosion and abrasion characteristics of alumina coatings plasma-sprayed under different spraying conditions, Tribol. Int. 31 (1998) 271–279.
- S. Guessasma, M. Bounazef, P. Nardin, T. Sahraoui, Wear behavior of alumina–titania coatings,analysis of process and parameters, Ceram. Int. 32 (2006) 13–19.
- Sulzer-Metco web site, http://www.sulzermetco.com.
- Sun, Y., Li, B., Yang, D., Wang, T., Sasaki, Y., Ishii, K., Unlubricated friction and wear behaviour of zirconia ceramics, Wear 215, 1998, 232-236.
- Wagner, J. R. Jr; Handbook of Troubleshooting Plastic Processes: A Practical Guide, John Wiley and Sons, 2012
- Y. Xie, H.M. Hawthorne, Wear mechanism of plasma-sprayed alümina coating in sliding contacts with harder asperities, Wear 225–229 (1999) 90–103.
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Engineering |
| Journal Section | Research Articles |
| Authors | |
| Project Number | 1139B411601028 |
| Publication Date | December 20, 2021 |
| Submission Date | August 7, 2020 |
| Acceptance Date | November 13, 2021 |
| Published in Issue | Year 2021 Volume: 9 Issue: 4 |
