Open AccessEffect of molybdenum on the hot-tearing susceptibility of the Ni-Cr-Mo-B system
Author(s) -
Aleksandr Nazarko,
R. L. Plomoyalo,
D. V. Dmitrenko
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/759/1/012019
Subject(s) - molybdenum , materials science , chromium , metallurgy , boron , alloy , metal , silicon , nickel , carbon fibers , composite material , chemistry , composite number , organic chemistry
The paper presents data on the effect of molybdenum on the hot-tearing susceptibility of the Ni-Cr-Mo-B system when surfacing with nickel-based alloys. With a boron content of 2.5-3.2%, as well as low carbon and silicon content, the alloying elements, depending on a doping concentration, have different effects on the technological strength of the deposited metal. Molybdenum increases the technological strength of alloys. Alloying the deposited metal with molybdenum in an amount up to 12% in alloys with 2.5% boron concentration at 20% chromium does not lead to the disappearance of cracks. At a molybdenum concentration of more than 12%, the number of cracks in the deposited bead decreases and when the molybdenum concentration is equal to 15%, the cracks disappear, and only increasing the molybdenum content to 20%, in the presence of at least 20% chromium in the alloy, makes it possible to obtain deposited metal without cracks.