EFFECT OF THE ROUGHNESS AND
TEMPERATURE OF THE SURFACE OF THE
BASE MATERIAL ON THE MECHANICAL
PROPERTIES OF THE COATING LAYER
(NICKEL - ALUMINUM) SPRAYED THERMALLY
BY FLAME
الباحث الأول:
Ammar Razzaq Hasan
عمار رزاق حسن
الباحثين الآخرين:
Al-Hadrayi Ziadoon M.R and Ibrahim Joodi Hadi
زيدون محمد راهي وابراهيم جودي هادي
المجلة:
International Journal of Mechanical Engineering and Technology (IJMET)
تاريخ النشر:
None
مختصر البحث:
In this research, the thermal coating process was carried out using flame spraying
technique using a gas mixture of oxygen and acetylene for the purpose of obtaining a
surface layer of nickel-aluminum(metco450) coating on the surface of medium c…
In this research, the thermal coating process was carried out using flame spraying
technique using a gas mixture of oxygen and acetylene for the purpose of obtaining a
surface layer of nickel-aluminum(metco450) coating on the surface of medium carbon
steel type (AISI 1050) which provide an increase in surface properties and compensation
of the base material when lost due to friction or wear.
The research was carried out in three successive stages. The first stage included the
preparation of the specimens and the design of the base surface of these specimens and
Preparation of powder coating and analysis of chemical components for base material
and powder coating. The second stage included the implementation of the coating process
of (nickel-aluminum) powder by using the flame spray. The coating process was carried
out in different ways for each model by changing the different spraying factors, which
included the surface roughness of the specimens and the surface temperature of the
specimens before the coating process. The third stage of the research included
mechanical testing procedures of the coating layer.
The tests showed that adhesion increases with increasing surface roughness of the
sample prior to coating and the best adhesion is obtained when the base surface of the
sample is heated to a temperature of (350 ºC) before the coating process. The resistance
of the coating layer to wear is increased with the roughness of the base material surface
of the sample due to the increased adhesion of the coating layer and the best resistance
to wear when heating the surface of the base material of the sample before coating to
temperature (350 ºC). The hardness of the coating layer is increased by increasing the
roughness of the surface of the base material of the sample before the coating process
and the best surface hardness of the coating layer when heating the surface of the base
material of the sample before the coating process to (350 ºC).
