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- Title
STRENGTHENING PHASES, STRUCTURE AND PROPERTIES OF LOW-ALLOY STEEL MODIFIED WELDS.
- Authors
GOLOVKO, V. V.; MARKASHOVA, L. I.; KUSHNARYOVA, O. S.; ZHUKOV, V. V.
- Abstract
Effect of dispersoid inoculants (phase inclusions) in form of TiC, SiC and ZrO2 refractory compounds on kinetics of structural transformations in weld metal of high-strength low-alloy steels was investigated. Effect of the inoculants of different type on displacement of bainite transformation into area of higher temperatures is shown. Electron microscopy is used to analyze the nature of structural-phase changes in formation of bainite structure, i.e. peculiarities of fragmentation, distribution of dislocation density and morphology of carbide phase precipitation. The estimations of specific contribution of all structures and their parameters (phase composition, grain, subgrain and dislocation structures etc.) on carried change of strength characteristics and crack resistance of weld metal at inoculation of disperse phase inclusions were out. The optimum composition was determined for dispersoid inoculants used in welding of high-strength low-alloy steels. They provide for necessary mechanical properties of welded joints, including their crack resistance.
- Subjects
STEEL alloys; WELDED joints; ELECTRON microscopy
- Publication
Paton Welding Journal, 2016, Issue 7, p2
- ISSN
0957-798X
- Publication type
Article
- DOI
10.15407/tpwj2016.07.01