NDT Technology

NDT Technology

Investigation in common defects in investment casting by industrial X-ray radiography in the oil and gas industry

Document Type : Original Article

Authors
Setareh Aghaeian 1
Ali Kalateh Mollaei 2
Mohammad Reza Babaei 3
Hamid Nosrati 4
1 Quality Control Specialist
2 Head of Quality Control
3 Quality Control Manager
4 Head of RT Department
10.30494/jndt.2021.277547.1072
Abstract
Nowadays, it is essential to know the precision casting parts, especially the parts of gas turbines, and investigate their destruction due to their role in electricity supply and oil and gas transmission. Therefore, the use of alloys capable of withstanding thermal and mechanical stresses and operating at temperatures above 800 ° C are required to manufacture such parts with acceptable accuracy and precision. In this study, we decided to control parts' behavior in different casting conditions (for example in critical working conditions) by introducing common defects in precision casting, and identifying them by industrial X-ray radiography, methods and recognizing such defects, and preventing them in the next products in order to ensure the high level of quality acheivement. Or eliminating them to reduce production risk, save time, decrease initial and current costs in the applied industry, and increases the reliability of manufactured parts and efficiency, which cause high functional efficiency of the gas turbine.
Keywords
Industrial Radiography
Investment Casting
Non-Destructive Tests
Gas Turbine
Hastelloy X
[1] Asgar. K., “Casting Metals in densitry, Past-Present-Future”, PMID 3073783. S2CID 17215227. Advances in dental research. 1988.
[2] Dinghua Zhang, Yunyong Cheng, Ruisong Jiang, Neng Wan “Turbine blade investment casting die technology” ISBN 978-3-662-54186-9, Springer. 2018
[3] American Society for Metals; ASM International Handbook Committee; ASM International Alloy Phase Diagram Committee (1990), ASM Handbook: Casting, 15 (10th ed.), ASM International, ISBN 978-0-87170-021-6.
[4] Markee, J., “Atlas of Casting Defects”, An Investment Castig Institude Publication. 2017
[5] ملایی، ن، نامی، ب، پرویزی، س، 1398، "تاثیر متغیرهای دما و زمان پیرسازی نهایی برخواص مکانیکی و ریزساختار اینکونل792"، مجله مهندسی مکانیک، شماره پیاپی 88، صفحه 325-319
]6[ کلاگر، ع، 1388، "مکانیزم های شکست پره های توربین های گاز از جنس سوپرآلیاژ پایه نیکل"، اولین کنفرانس ملی صنعت نیروگاه های حرارتی، تهران، ایران.
[7] Wegst, C. “Key to Steel” Handbook. 2019 edition
[8] “ASM Handbook. Nondestructive Evaluation and Quality Control” ISBN 0871700077. ASM INTERNATIONAL. 1992.
[9] Alloy International, INC. https://alloysintl.com
[10] Henschel, S., Dudczig, S., 2016, “Effect of non-metallic inclusions and shrinkage cavities on the dynamic fracture toughness of a high-strength G42CrMo4 cast steel”.
[11] Pollock, T. M., Tin, S., 2006. "Nickel-based superalloys for advanced turbine engines: chemistry, microstructure and properties", Journal of propulsion and power, Vol. 22, 361-374.

  • Receive Date 16 March 2021
  • Revise Date 08 October 2021
  • Accept Date 11 November 2021