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Journals / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi / 2013 / Cilt: 21 Sayı: 2

EFFECT OF THE COOLING IN THE AUSTEMPERING PROCESS ON THE ABRASIVE WEAR BEHAVIOR OF AUSTEMPERED DUCTILE IRON

ÖSTEMPERLENMİŞ KÜRESEL GRAFİTLİ DÖKME DEMİRİN ABRASİV AŞINMA DAVRANIŞINA ÖSTEMPERLEME İŞLEMİNDE SOĞUTMANIN ETKİSİ

Melik Çetin
Ferhat Gül
Pages
359–366
Publication Date
2013-03-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In addition, the abrasive wear resistance of two step austempered specimen increased with increasing applied load.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, ductile iron was austenised at 900 o C for 1 h and austempered at 400 0 C for 2 h in single step austempering process, whereas it was austenised at 900 o C for 1 h and immediately quenched in a salt bath at 400 o C for 10 minutes and then the temperature of bath was decreased by 1.88 o C per minutes down to 250 o C in two-step austempering process.
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Key Findings & Data:The upper ausferritic austempered ductile iron (ADI) specimens produced by conventional single step austempering process and the upper and lower ausferritic specimens produced by twostep austempering process were abraded on the pin on disc apparatus under the normal load of 10, 20, 30 N, by rubbing the specimens on abrasive Al2O3 grains with diameters of 180 Mesh (80 µm).
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Conclusion & Impact:In addition, the abrasive wear resistance of two step austempered specimen increased with increasing applied load.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Abrasive aşınma · östemperlenmiş küresel grafitli dökme demir · sertlik

Abstract

In this study, ductile iron was austenised at 900 o C for 1 h and austempered at 400 0 C for 2 h in single step austempering process, whereas it was austenised at 900 o C for 1 h and immediately quenched in a salt bath at 400 o C for 10 minutes and then the temperature of bath was decreased by 1.88 o C per minutes down to 250 o C in two-step austempering process. The upper ausferritic austempered ductile iron (ADI) specimens produced by conventional single step austempering process and the upper and lower ausferritic specimens produced by twostep austempering process were abraded on the pin on disc apparatus under the normal load of 10, 20, 30 N, by rubbing the specimens on abrasive Al2O3 grains with diameters of 180 Mesh (80 µm). Although the ductile iron austempered in two steps had higher hardness than the ductile iron austempered in single step, they showed similar abrasive wear behavior. In addition, the abrasive wear resistance of two step austempered specimen increased with increasing applied load.

Özet

Bu çalışmada, geleneksel tek kademeli östemperleme işleminde, küresel grafitli dökme demir (KGDD) numuneler 900oC’de 1 saat östenitlenmiş, müteakiben tuz banyosunda 400oC’de 2 saat östemperlenmiştir. İkikademeli östemperleme prosesinde ise KGDD numuneler 900oC de 1 saat östenitlendikten sonra derhal 400oC’lik tuz banyosuna aktarılmış, 10 dakika bu sıcaklıkta bekletildikten sonra banyonun sıcaklığı 1.88oC/dak hızla 250oC’a soğutulmuştur. Geleneksel tek kademeli östemperleme prosesi ile üretilen üst ösferritik ve ikikademeli prosesle üretilen üst ve alt ösferritik Östemperlenmiş Küresel Grafitli Dökme Demir (ÖKGDD) numunelerin abrasiv aşınma deneyleri, disk üzerinde pim cihazında 10, 20 ve 30 N normal yük altında, 180 mesh (80 μm) boyuta sahip Al2O3 zımpara üzerinde gerçekleştirilmiştir. İki kademeli östemperleme prosesiyle üretilen küresel grafitli dökme demirin sertliği, tek kademeli prosesle üretilen dökme demirinkinden daha yüksek olmasına rağmen, her iki dökme demirin benzer abrasiv aşınma davranışı sergilediği görülmüştür. Ayrıca iki kademeli östemperlenmiş küresel grafitli dökme demirde abrasiv aşınma direnci uygulanan yükün artmasıyla artmıştır.

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Cite This Article

Çetin, M., Gül, F. (2013). EFFECT OF THE COOLING IN THE AUSTEMPERING PROCESS ON THE ABRASIVE WEAR BEHAVIOR OF AUSTEMPERED DUCTILE IRON. Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Cilt: 21 Sayı: 2, 359–366. https://ajindex.com/articles/1078989

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References (94)

  1. Janowak, J.F., Gundlach, R.B., “Development of
  2. a Ductile Iron for Commercial Austempering”,
  3. AFS Transactions, 83-54,377-388, 1983.
  4. Harding, R.A., Gilbert, G.N.J., “Why the
  5. Properties of Austempered Ductile Irons Should
  6. Interest Engineers”, The British Foundryman,, 489-496, 1986.
  7. Walton, C.F., “Mechanical Properties of Ductile
  8. Iron”, Iron Castings Handbook, Iron Castings
  9. Society Inc., 323-376, 1981.
  10. Schmidt, I., Schuchert, A.Z., “Unlubricated
  11. Sliding Wear of Austempered Ductile Iron”,
  12. Metallkunde, 78, 871–875, 1987.
  13. Johansson, M., “Austenitic-Bainitic Ductile
  14. Iron”, AFS Transactions, 77-73, 117-122, 1977.
  15. Lerner, Y.S., “Wear Resistance of Austempered
  16. Ductile Iron”, Foundry Management & Technology,
  17. 80, 1999.
  18. Bartosiewicz, L., Krause, A.R., Kovacs, B.,
  19. Putatunda, S.K., “Fatigue Crack Growth
  20. Behavior of Austempered Ductile Cast Iron”,
  21. AFS Transactions 92 (135), 135–143, 1992.
  22. Bahmani, M., Elliott, R., Varahram, N., “The
  23. Relationship between Fatigue Strength and
  24. Microstructure in an Austempered Cu–Ni–Mn–
  25. Mo alloyed ductile iron”, Journal of Materials
  26. Science, 32, 5383-5388, 1997.
  27. Greno, G.L. Otegui, J.L., Boeri, R.E., Mechanisms
  28. of Fatigue Crack Growth in Austempered Ductile
  29. Iron”, International Journal of Fatigue, 21, 35-, 1999.
  30. Dommarco, R.C., Salvande, J.D., “Contact Fatigue
  31. Resistance of Austempered and Partially Chilled
  32. Ductile Irons”, Wear, 254, 230–236, 2003.
  33. Putatunda, S.K., Gadicherla, K., “Influence of
  34. Austenitizing Temperature on Fracture Toughness
  35. of a Low Manganese Austempered Ductile Iron
  36. (ADI) with Ferritic as Cast Structure”, Materials
  37. Science and Engineering A 268, 15–31, 1999.
  38. Rao,P., Putatunda, S.K., “Investigations on the
  39. Fracture Toughness of Austempered Ductile Irons
  40. Austenitized at Different Temperatures”, Materials
  41. Science and Engineering A 349, 136-149, 2003.
  42. Rao, P., Putatunda, S.K., “Investigations on the
  43. Fracture Toughness of Austempered Ductile Iron
  44. Alloyed with Chromium”, Materials Science
  45. and Engineering A 346, 254-265, 2003.
  46. Jianghuai Yang, J., Putatunda, S.K., “Improvement
  47. in Strength and Toughness of Austempered
  48. Ductile Cast Iron by a Novel Two-Step
  49. Austempering Process”, Materials and Design, 219–230, 2004.
  50. Putatunda, S.K., “Development of Austempered
  51. Ductile Cast Iron (ADI) with Simultaneous High
  52. Yield Strength and Fracture Toughness by a Novel
  53. Two-Step Austempering Process”, Materials
  54. Science and Engineering A 315, 70-80, 2001.
  55. Şenel, L., Çetin, M., Gül, F., “Evaluation of Dry
  56. Sliding Wear of Ductile Iron with Different Matrix
  57. Microstructures”, 3th International Advenced
  58. Technologies Symposium, August 18-20, Ankara,
  59. 166, 2003.
  60. Zimba, J., Simbi, D.J., Navara, E., “Austempered
  61. Ductile Iron: An Alternative Material for Earth
  62. Moving Component”, Cement & Concrete
  63. Composites, 25, 643-649, 2003.
  64. Yescas, M.A.,. Bhadeshia, H.K.D.H., “Model for
  65. the Maximum Fraction of Retained Austenite in
  66. Austempered Ductile Cast Iron”, Materials Science
  67. and Engineering A 333 60–66, 2002.
  68. Bosnjak, B., Verlinden, B., and Radulovic, B.,
  69. “Dry Sliding Wear of Low Alloyed Austempered
  70. Ductile Iron”, Materials Science and Technology,, 650-656, 2003.
  71. Hamid Ali A.S. and Elliot, R., “Influence of
  72. Austenitising Temperature on Austempering of
  73. an Mn-Mo-Cu Alloyed Ductile Iron, Part 1-
  74. Austempering Kinetics and the Processing
  75. Window”, Materials Science and Technology,, 1021-1031, 1996.
  76. Prado, J.M., Oujol, A., Cullell, J., and Tartera, J.,
  77. “Dry Sliding Wear of Austempered Ductile Iron”,
  78. Materials Science and Technology, 11, 294-298,
  79. Owhadi, A., Hedjazi, J.,Davami, P., “Wear
  80. Behavior of 1.5Mn Austempered Ductile Iron”,
  81. Journal of Materials Science, 14, 245-250, 1998.
  82. Jeng, M.C., “Abrasive Wear Study of Bainitic
  83. Nodular Cast Iron”, Journal of Materials Science,, 6555-6561, 1993.
  84. Shepperson, S., and Allen, C., “The Abrasive Wear
  85. Behavior of Austempered Spheroidal Cast Irons”,
  86. Wear, 121, 271-287, 1988.
  87. Velez, J. M., Tanaka, D.K., Sinatora, A.,
  88. Tschiptschin, A.P., “Evaluation of Abrasive Wear
  89. of Ductile Cast Iron in a Single Pass Pendulum
  90. Device”, Wear, 251, 1315–1319, 2001.
  91. Çetin, M., Gül, F., “Effect of Mg on Abrasive and
  92. Adhesive Wear Behavior of Al-Cu Casting Alloy”,
  93. th International Advanced Technologies
  94. Symposium, August 18-20, Ankara, 134-145,