Metallurgy, Vol. 62 No. 1, 2023.
Preliminary communication
Theoretical background of the restoring of the crankshaft necks by ferromagnetic materials welding
O. K. Abdirashev
; Eurasian National University named after L. N. Gumilev, Nur-Sultan, Kazakhstan
S. Zh. Oralbayev
; Almaty Technological University, Almaty, Kazakhstan
Y. D. Shambulov
; Almaty Technological University, Almaty, Kazakhstan
G. A. Smailova
; Satbayev University, Almaty, Kazakhstan
A. Bukayeva
; Yessenov University, Aktau, Kazakhstan
D. Yergaliyev
A. Tulegulov
; Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
A. Zhauyt
; Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
Abstract
When developing the technological process of cast iron crankshaft restoring, it is necessary to obtain a martensitic structure in the pad weld in order to ensure the wear resistance needed. To form the martensitic structure the cooling rate after padding must be at least 80 - 90 0°C / s. The helical surface welding does not lead to such a result, so in our research we use the welding according to the width of the shaft neck. We also examined the heat release from the pad weld and its cooling rate. For its implementation, the necessary calculations were made according to a compiled program in the QBASIC language. On the basis of these provisions, the theoretic background is proposed for the possibility of the wide-ringed welding of crankshaft necks, which ensures a minimal change in the structure and geometry of the crankshafts.
Keywords
crankshaft; welding; restoring; numerical method; structure
Hrčak ID:
281405
URI
Publication date:
1.1.2023.
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