Abstract:
The problem of erosive wear is a common phenomenon observed in machines and equipment. The
phenomenon occurs most frequently in cooling systems, piping and lubrication systems. In
Sahaviriya Hot Strip Mill, the plant is periodically shut down due to stripper failure as a result of
water jet impingement. The study of erosive wear behaviors of material due to water impingement
is essential to gain knowledge of that could lead to better design of the stripper and associated parts.
The objective of this work is to study the effects of different surface treatments namely; heat
treatment by oil quenching and tempering, wire arc thermal spray coating, hard facing by welding
and normal surface (as-rolled) on erosive wear behaviors of AISI 4140 steel at three water jet
impact angles of 30, 60 and 90 degrees. The results showed that the steel in the oil quenched and
tempered condition had the highest erosion resistance followed by specimens with hard facing and
those with wire arc thermal spray coating showed the lowest resistance. The 30 degree impingement
angle produced more surface loss than 60 and 90 degrees for all of surface treatments. AISI 4140
steel with oil quenching and tempering is the most suitable material for the stripper because the
material processes good erosion resistance in every angle of water impingement.