Mechanical characteristics of heterogeneous structures obtained by high-temperature brazing of corrosion-resistant steels with rapidly quenched non-boron nickel-based alloys

Recently, the use rapidly quenched boron-containing nickel filler metals for high temperature brazing corrosion resistance steels different classes is perspective. The use of these alloys leads to the formation of a complex heterogeneous structure in the diffusion zone that contains separations of i...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-01, Vol.945 (1), p.12024
Main Authors: Kalin, B, Penyaz, M, Ivannikov, A, Sevryukov, O, Bachurina, D, Fedotov, I, Voennov, A, Abramov, E
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Borides
Boron
Brazed joints
Brazing alloys
Corrosion resistance
Corrosion resistant steels
Dynamic loads
Fillers
Heterogeneous structure
High temperature
Impact strength
Martensitic stainless steels
Mechanical properties
Nickel
Nickel base alloys
Physics
Rapid quenching (metallurgy)
Silicides
Silicon
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Summary:Recently, the use rapidly quenched boron-containing nickel filler metals for high temperature brazing corrosion resistance steels different classes is perspective. The use of these alloys leads to the formation of a complex heterogeneous structure in the diffusion zone that contains separations of intermediate phases such as silicides and borides. This structure negatively affects the strength characteristics of the joint, especially under dynamic loads and in corrosive environment. The use of non-boron filler metals based on the Ni-Si-Be system is proposed to eliminate this structure in the brazed seam. Widely used austenitic 12Cr18Ni10Ti and ferrite-martensitic 16Cr12MoSiWNiVNb reactor steels were selected for research and brazing was carried out. The mechanical characteristics of brazed joints were determined using uniaxial tensile and impact toughness tests, and fractography was investigated by electron microscopy.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/945/1/012024