Properties of welded joints of metal structures after hardening deformation-heat treatment

Authors

DOI:

https://doi.org/10.15587/2312-8372.2014.23371

Keywords:

deformation-heat treatment, steels for metal structures, welded joints, properties

Abstract

The influence of deformation-heat treatment of welded joints from separate heating and using welding heat on the structure and properties of low-carbon steels for metal structures is considered in the paper. Some results of our research in this field are given. The main purpose of the research is to study the influence of the temperature gradient during welding and chemical composition of the structure formation in the basic and the weld metal, the possibilities of using welding heat for hardening welded joints of metal structures. Using technology for deformation-heat hardening of welded metal structures using welding heat will allow to reduce energy and labor expenditures, their manufacturing duration and increase the working efficiency on average by 1.2 times. The positive influence of deformation on forming an equilibrium structure in both the welded seam, and the heat-affected zone depending on the chemical composition of the weld metal is shown in the paper. The effect of carbon equivalent on the mechanical properties of welded joints is demonstrated. The research results can be used in manufacturing butt-welded joints of different designs, in particular pipelines at construction sites and plants. Using the obtained results will allow to improve the toughness of metal structures while maintaining sufficient hardness.

Author Biographies

Алла Петрівна Штихно, SHEE "Donetsk National Technical University", Str. 58, Donetsk, Ukraine, 83000

Ph.D., Associate Professor

Department of Physical Materials

Валерій Іванович Алімов, SHEE "Donetsk National Technical University", Str. 58, Donetsk, Ukraine, 83000

Doctor of Technical Sciences, Professor

Department of Physical Materials

Олександр Олександрович Полянський, SHEE "Donetsk National Technical University", Str. 58, Donetsk, Ukraine, 83000

Department of Physical Materials

Дмитро В’ячеславович Васютченко, SHEE "Donetsk National Technical University", Str. 58, Donetsk, Ukraine, 83000

Department of Physical Materials

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Published

2014-03-18

How to Cite

Штихно, А. П., Алімов, В. І., Полянський, О. О., & Васютченко, Д. В. (2014). Properties of welded joints of metal structures after hardening deformation-heat treatment. Technology Audit and Production Reserves, 2(1(16), 57–61. https://doi.org/10.15587/2312-8372.2014.23371

Issue

Vol. 2 No. 1(16) (2014): Technology audit. Production reserves

Section

Production reserves

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Copyright (c) 2016 Алла Петрівна Штихно, Валерій Іванович Алімов, Олександр Олександрович Полянський, Дмитро В’ячеславович Васютченко

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