The Paton Welding Journal, 2025, №04

2025 №04 (03)

DOI of Article 10.37434/tpwj2025.04.04

2025 №04 (05)

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The Paton Welding Journal, 2025, #4, 22-26 pages

Ways to increase the fatigue fracture resistance of welded joints of high-hardness armor 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 NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: paton39@ ukr.net
²DP “Zhytomyr Armor Tank Plant” 1 Druzhby Narodiv Str., 12441, Zhytomyr Region, Novoguyvinske Urban Settlement, Ukraine

Abstract
The influence of mechanical impact methods of treatment on the fatigue resistance of joints of high-hardness armor 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 HB500MOD armor steel, made using KhORDA 307Ti wire (08Kh20N9G7T alloying system), which were additionally subjected to layer-by-layer low-frequency peening of the deposited metal during welding, high-frequency peening of the fusion zone and adjacent HAZ metal and shot peening of the joint surface after their welding. It was established that thermal tempering of armor steel joints with a high-alloy weld does not contribute to an increase in the fatigue resistance. The most effective methods to increase the fatigue resistance of joints are mechanical high-frequency peening or enhanced shot peening after welding.
Keywords: high-hardness armor steel, welded joints, fatigue fracture resistance, low tempering, mechanical low-frequency peening, mechanical high-frequency peening, shot peening

Received: 12.10.2024
Received in revised form: 21.01.2025
Accepted: 07.05.2025

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Suggested Citation

O.A. Gaivoronsky, V.D. Poznyakov, A.V Safinsky, A.V. Zavdoveev, T.O. Alekseenko, V.A. Yashchuk (2025) Ways to increase the fatigue fracture resistance of welded joints of high-hardness armor steels. The Paton Welding J., 04, 22-26.

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