Marine Repair Workshops / Maintenance & Repair Solutions
Valves and Valve seats of Diesel engines are subject to wear by high temperature and metal to metal friction
Depending on Welding equipment available use on of the following alloys
- SMAW 1 : 290 (Ni based alloy) as build up and or final layer
- GTAW: 290 -GTAW as build up and or final layer/406 (CO 6 ) as final Top layer
- PTA : ARCWEL 2006- PTA -Powder
Above filler metals can increase the lifetime of Valves many times
Valve coated using PTA Process
Filler: Metalpowder Ni Co
“ARCWEL 2006 PTA” powder
Valve seats rebuilt by
GTAW Process, Filler rod
ARCWEL 290-GTAW
PISTON CROWNS MADE FROM ALLOY STEELS ARE SUBJECT TO HIGH TEMPERATURES ,AND FRICTION.
The surfaces tend to wear down and need to be rebuilt .
Depending on Equipment available the following filler materials are suitable for rebuilding piston
crowns.
SMAW PROCESS
- ARCWEL 350 – SMAW (220-250 HB)
- ARCWEL 450- SMAW (HRC 45)
GMAW PROCESS
- ARCWEL 350—GMAW /FCAW
LASER
- ARCWEL 2040 LAS (HRC 40 Ni base)
- ARCWEL 2006 LAS ( HRC 40 Co Base )
Worn Piston crown totally rebuilt using
The SMAW process (ARCWEL 355)
RECOMMENDATIONS:
- Clean surface to be rebuilt by grit blas
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