Automatic Welding, 2025, №02

2025 №02 (02)

2025 №02 (04)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #2, 2024, pp. 23-28

Ways to increase the fatigue fracture resistance of welded joints of high-hardness armored steels

O.A. Gaivoronsky¹, V.D. Poznyakov¹, A.V. Safinsky², A.V. Zavdoveev¹, T.O. Alekseenko¹, V.A. Yashchuk¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: paton39@ukr.net
²DP «Zhytomyr armored tank plant». 1 Druzhby Narodiv Str., 12441, Zhytomyr region, Novoguyvinske urban settlement, Ukraine

The influence of mechanical impact methods of processing on fatigue resistance of joints of high-hardness armored steels, compared to low tempering, in welding with high-alloy welding materials was studied. The paper presents the results of tests by cyclic out-of-plane bending of welded joints of armored steel of HB 500 MOD grade, made with wire of KHORDA 307Ti brand (08Kh20N9G7Т alloying system), additionally subjected to layer-by-layer low-frequency peening of the deposited metal during welding, high-frequency peening of the fusion zone and adjacent metal of the HAZ and shot peening of the joint surface after their welding. It is established that thermal tempering of armored steel joints with a high-alloy weld does not contribute to increase in fatigue resistance. The most effective methods of increasing the fatigue resistance of the joints are mechanical high-frequency peening or enhanced shot peening after welding. 10 Ref., 4 Fig.
Keywords: high-hardness armored steel, welded joints, fatigue fracture resistance, low-temperature tempering, mechanical low-frequency peening, mechanical high-frequency peening, shot peening


Received: 18.10.2024
Received in revised form: 21.01.2025
Accepted: 17.02.2025

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