The Paton Welding Journal, 2011, №04



2011 №04 (07)

2011 №04 (09)

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The Paton Welding Journal, 2011, #4, 35-38 pages  

INFLUENCE OF SURFACE STRENGTHENING AND ARGON-ARC TREATMENT ON FATIGUE OF WELDED JOINTS OF STRUCTURES OF METALLURGICAL PRODUCTION

E.V. KOLOMIJTSEV¹ and A.N. SERENKO²

¹PJSC «Ilyich Iron & Steel Works», Mariupol, Ukraine
²Priazovsky State Technical University, Mariupol, Ukraine
 
 
Abstract
The results of fatigue tests of the T-joints on low-alloy steels are given and methods for extending the life and increasing the strength of welded joints (surface deformation by using a ball-rod strengthening device and argon-arc treatment) are described. It is shown that the optimal method is surface strengthening of the weld and near-weld zone. Treatment of crane beams and rocker bars of well cranes «Slabbing-1150» at the «Ilyich Iron & Steel Works» by this method provided a 15 times increase in their cyclic fatigue life.
 
 
Keywords: welded structures, crane beams, welded joints, surface strengthening, argon-arc treatment, residual stresses, stress concentration, fatigue strength, life
 
 
Received:                ??.??.??
Published:               28.04.11
 
 
References
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2. Mikheev, P.P. (1981) Methods of fatigue resistance improvement of steel structure welded joints. Kiev: Znannya.
3. Asnis, A.E., Ivashchenko, G.A. (1985) Increase in strength of welded structures. Kiev: Naukova Dumka.
4. Olejnik, N.V., Kychin, V.P., Lugovsky, A.L. (1984) Surface dynamic strengthening of machine parts. Kiev: Tekhnika.
5. Kolomijtsev, E.V., Serenko, A.N. (1990) Effect of ultrasonic impact and laser treatment on fatigue resistance of welded joints in air and corrosion media. Avtomatich. Svarka, 11, 13-15.
6. Kravtsov, T.G., Sevryukov, V.V. (2001) Ultrasonic treatment of ship parts and welded structures. Nikolaev: UGMTU.
7. Kolomijtsev, E.V., Serenko, O.M., Kirilchenko P.M. Device for deformation strengthening of welded joints. Pat. 30992 Ukraine for utility model. Publ. 25.03.2008.
8. Makhnenko, V.I., Kravtsov, T.G. (1986) Thickness of plastically deformed layer in ultrasonic impact treatment of surfaced products. Avtomatich. Svarka, 8, 14-19.

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