2019 №07 (04) DOI of Article
2019 №07 (06)

The Paton Welding Journal 2019 #07
TPWJ, 2019, #7, 21-24 pages
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #7, 2019 (July)
Pages                      21-24

Plasma-arc brazing of steel 08kp (rimmed) by using brazing filler metals OF Cu–Mn–Ni–Si system

S.V. Maksymova and I.V. Zvolinskyy
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@isi@nas.ua

The paper presents the results of high-temperature differential thermal analysis of brazing filler metals based on Cu–Mn–Ni–Si system, metallographic examination of brazed joints of 08kp steel, made with application of plasma-arc heating. It is shown that at silicon alloying of Cu–Mn–Ni system the alloy melting temperature decreases and its wetting ability increases. X-Ray microanalysis revealed that brazed weld of 08kp steel joints consists of copper-based solid solution and dispersed precipitates of a silicon-enriched phase. An iron-based phase with higher concentration of silicon and manganese is formed on brazing filler metal–base metal interphase as a thin band (along the brazed weld), that is indicative of appearance of silicides of a complex composition. Brazed joint strength becomes higher with increase in nickel concentration in the alloy and is equal to 367 MPa (average value). 9 Ref., 2 Tables, 6 Figures.
Keywords: plasma-arc brazing, brazing filler metal, microstructure, spreading, solidus and liquidus temperature, strength
Received:                22.04.19
Published:               24.07.19


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