Effect of Tempering Temperature on Physical and Mechanical Properties of Martensitic Stainless Steel Repaired with Gtaw

https://doi.org/10.22146/jmpc.53220

Gangsar Pinilih(1*), Kusmono Kusmono(2)

(1) Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada. Jl. Grafika 2, Yogyakarta 55281, Indonesia
(2) Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada. Jl. Grafika 2, Yogyakarta 55281, Indonesia
(*) Corresponding Author

Abstract


One of the driving equipment to produce electricity that is widely used is gas turbines. To guarantee gas turbine can be operated according to its design and capacity, it is necessary to choose a material that is suitable for its operating conditions and working temperature. Commonly gas turbine compressor blade material is a martensitic stainless steel which has a high enough strength at the compressor working temperature. Damage that is often experienced occurs at the compressor blade and turbine blade. Gas tungsten arc welding (GTAW) build-up repair is one of the methods used to repair blades. This research was conducted to analyze the effect of tempering temperatures on martensitic stainless steel repaired with GTAW. Research was focus on mechanical properties and microstructure after repaired with GTAW and had heat treatment with various tempering temperatures. In the microstructure, all weld area of the specimens that were tempered at temperatures of 200, 500 and 600°C showed the same microstructure characteristics which consisted of a matrix of tempered martensite as well as chromium carbide. The size of tempered martensite at temperatures of 600°C is larger than 500 and 200°C. The strength and hardness of the material with a tempering temperature of 200°C is higher in value compared to tempering temperatures of 500°C and 600°C, while the toughness of the material with tempering temperature of 500°C is higher compared to 200°C and 600°C.

 


Keywords


Compressor blade turbine, GTAW, heat treatment, tempering temperature, mechanical properties, microstructure.

Full Text:

PDF


References

ASM, 1991, ASM Handbook Volume 4 Heat Treating.

ASM, 1998, ASM Handbook Volume 6 Welding Brazing and Soldering

ASME, 2007, ASME Boiler and Pressure Vessel Code Section IX Welding and Brazing Qualifications, ASME Press, New York.

ASTM, 2013, ASTM Designation E8/E8M-13a, Standard Test Methods for Tension Testing of Metallic Materials.

ASTM, 1997, ASTM Designation 92-82, Standard Test Methods for Vickers Hardness of Metallic Materials.

Bonagani, S.K., Vishwanadh, B., Tenneti, S., Naveen Kumar, N., and Kain, V., 2019, Influence of tempering treatments on mechanical properties and hydrogen embrittlement of 13% Cr martensitic stainless steel, International Journal of Pressure Vessel and Piping 176, 103969

Carter, T.J., 2004, Common Failures in Gas Turbine Blades, Engineering Faiulure Analysis 12, 237 -247

Gaunkar, G.V.P., Huntz, A.M., and Lacombe, P., 1980, Role of carbon in embrittlement phenomena of tempered martensitic 12Cr-0.15%C steel, Metal Science, 14 (7), 241-252.

Hardianto, 2019, Analisis Sifat Fisis dan Sifat Mekanis pada Perbaikan Sudu Kompresor Gas Turbin Siemens W501D5A Berbahan Dasar Baja Tahan Karat Martensitik dengan Variasi Tipe Pengelasan GTAW dan Laser Welding, Thesis.

Isfahany, A.N., Saghafian, H., Borhani, G., 2010, The Effect of Heat Treatment on Mechanical Properties and Corrosion Behavior of AISI 420 Martensitic Stainless Steel, Journal of Alloys and Compound 509, 3931-3936

Kou, S., 2003, Welding Metallurgy, Second Edition, John Willey & Sons, Inc.

Overton, T.W., 2016, A Primer on Gas Turbine Failure Modes, Connected Plant Conference

ZIA-EBRAHIMP, F. and G. KRAUSS, G., 1984, Mechanisms of Tempered Martensite Embrittlement in Medium-Carbon Steels, Acta Metallurgica, Vol. 32, No. 10, pp. 1767-1777



DOI: https://doi.org/10.22146/jmpc.53220

Article Metrics

Abstract views : 621 | views : 317

Refbacks

  • There are currently no refbacks.