Structure and properties of the heat-affected zone of low-alloyed cold-resistant steel for arctic application

Author:

Sych O. V.1,Khlusova E. I.1,Pazilova U. A.1,Yashina E. A.1

Affiliation:

1. NRC “Kurchatov Institute” – CRISM “Prometey”

Abstract

The paper presents the results of a comprehensive study of structural and properties changes in the most dangerous regions of the heat-affected zone of low-alloyed cold-resistant steel with a guaranteed yield strength of 355–390 MPa before and after the post-welding tempering, including when the heating temperature is subjected to tempering and deformation, comparing with the base metal. The simulation was performed on the dilatometer DIL 805 and the GLEEBLE 3800 complex. The results of the investigation of the structure and properties of real welded joints after welding with different linear energy (3.5 and 6 kJ/mm) are presented.

Publisher

FSUE CRISM Prometey

Reference22 articles.

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2. Harrison, P. L., Hart, P. H. M., HAZ microstructure and its role in the fracture of microalloyed steels welds, 2nd Griffith Conference on micromechanisms of fracture and their structural significance, Sheffield, UK, 13–15 September, 1995, pp. 57–68.

3. Kruglova, A. A., Orlov, V. V., Sharapova, D. M., Modeling heating effects in the heataffected zone of high-strength pipe steel K70 with double-pass submerged arc welding, Metallurgist, 2015, V. 58, Issue 9–10, pp. 806–814.

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5. Goli-Oglu, E. A., Influence of heat treatment after welding on the microhardness of steel joints in marine platforms, Steel in Translation, 2016, V. 46, No 5, pp. 361–363.

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