The Paton Welding Journal, 2013, №12



2013 №12 (04)

2013 №12 (06)

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The Paton Welding Journal, 2013, #12, 29-32 pages

INFLUENCE OF RESIDUAL STRESSES IN WELDED JOINTS OF TWO-LAYER STEELS ON SERVICE RELIABILITY OF METAL STRUCTURES

V.V. CHIGARYOV¹ and I.V. KOVALENKO²

¹Priazovsky State Technical University. 7, Universitetsky Lane, 87500, Mariupol, Ukraine. E-mail: chigarew@pstu.edu
²Company «Iliich Mariupol Metallurgical Works» 20, Levchenko Str., 87504, Mariupol, Ukraine. E-mail: oksikov19@mail.ru
 
 
Abstract
The main purpose of the present investigations is determination of influence of residual stresses in the near-weld zone of cladding layer of two-layer steel VSt3+ 10Kh13 on its operation properties. The task put before the authors was to compare theoretical and experimental values of residual stresses in welded specimens of two-layer steels VSt3+ 08Kh13, VSt3+ 10Kh13, VSt3+ 10Kh17N13M2T and to determine the material which is the most suitable for the further service. To define the level of residual stresses of cladding layer the low-cycle uniaxial loading of specimens and mathematical calculations were used. The results of measurements of residual stresses carried out using strain gauges and comparison of their values with theoretical ones allow making the confirmation that preset values of residual stresses in the near-weld zone of the joint VSt3 + 08Kh13 equal to 100 MPa evidences of the presence of reserve of operation reliability of the joints. On this reason the bimetal steels, described in the given work, are suitable for manufacture of large metallurgical units. 6 Ref., 1 Table, 5 Figures.
 
 
Keywords: arc welding of bimetals, residual stresses, cladding layer, near-weld zone, elasticity modulus, strain gauge, layer deformation, service properties
 
 
Received:                25.01.13
Published:               28.12.13
 
 
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