Distribution of residual stresses in welded joints in 09G2S steel produced by adaptive pulsed-arc welding

Sarayev, Yu.N.; Безбородов, В. С.; Grigoryeva, A. A.; Golikov, N. I.; Дмитриев, В. В.; Sannikov, I.I.

doi:10.1080/09507116.2014.897804

Cited by 19 publications

(2 citation statements)

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“…The method and modes of hardfacing affect the quality of surface-modified layers [18][19][20]. By varying the surfacing parameters, it is possible to obtain a deposited layer with different microstructure, residual stresses, surface topography, hardness, and wear resistance of surface layer materials [21][22][23][24].…”

Section: Literature Reviewmentioning

confidence: 99%

Determination of Optimal Hardfacing Modes for Recovering Electric Motor Shafts

2023

Teh. vjesn.

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The research aims to determine the optimal modes of hardfacing when restoring the shafts of electric motors, taking into account the resulting hardness of the deposited layer for further machining. When conducting a full-scale experiment on hardfacing, samples (200 × 100 × 10 mm) of steel 3 were used, which were preliminarily ground. For hardfacing, such hardfacing materials were used as 1/S -7018, Sv-08G2S.The advantages and disadvantages of various surfacing methods are established. The hardness values of the deposited layer with material 1/S -7018.1 were determined in manual hardfacing, with Sv08G2S material -in semi-automatic hardfacing in a protective gas environment (CO2 -100%), with Sv-08G2S material -automatic surfacing under the layer flux. It has been established that the most effective and economical method of surfacing during the restoration of electric motor shafts is a semi-automatic method in a carbon dioxide environment. Regression analysis was used to build a mathematical model for determining the optimal hardfacing modes, taking into account the hardness of the deposited layer. The correlation coefficients are determined, which indicate a strong linear relationship between the hardness of the deposited layer and such technological parameters as current strength, welding arc voltage, and effective power. For the first time, a mathematical model was obtained for the dependence of the hardness of the deposited layer on the technological parameters of the coating -current strength, voltage, and arc power. The existence of a connection between the technological parameters of surfacing has been established.

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Section: Literature Reviewmentioning

confidence: 99%

Determination of Optimal Hardfacing Modes for Recovering Electric Motor Shafts

2023

Teh. vjesn.

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“…The problem of increasing the serviceability of the products containing welded joints and surfaced coatings is quite urgent. One of the most effective trends of enhancing the performance characteristics of high-duty constructions is improvement of the welding procedure and surfacing due to application of new welding materials modified by multiphase structural compositions [1][2][3][4][5][6][7][8][9][10], and methods of adaptive pulsed-arc welding and surfacing that provide a possibility to control the nature of micrometallurgical process behavior due to the pulsed modification of power mode parameters [11][12][13][14][15]. At the same time owing to a programmable input of heat into the area of a welded joint, control of the melting processes and transfer of every droplet of the electrode metal, it is possible to obtain a disperse structure in weld metals, coatings and their heat-affected zones in the areas of permanent joints of engineering systems.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Pulsed Heat and Power Supply on the Structure and Properties of Welded Joint Metals and Surfaced Coatings

Saraev

Безбородов

Putilova

2015

AMM

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We have investigated the influence of the modes of adaptive pulse-arc welding and surfacing on the structure and physical-mechanical properties of welded joints of steel 09Mn2Si and the surfaced composition of this steel coated with a modified powder material of chromium carbide with the submicrocrystalline structure. It is shown that the pulsed mode of welding and surfacing can improve the homogeneity of the structure of the welded joint of steel and a surfaced coating and reduce the grain size of metals in both of them. Structural changes lead to an increase in ductility and toughness of the weld metal.

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