Nickel Alloy/Inconel 625 Cladding water wall panel/
Boiler,membrane,anticorrosion
Production Information
Nickel base weld overlays are commonly used in the Power Industry
to extend the life of equipment subjected to aggressive corrosion
enviroments.
As boiler conditions have become more aggressive over the
years,Nickel base alloy overlays have become more commonly used,not
just for repair and maintenance purposes,but also as a cost
effective solution for new boiler installations.
| | Steel clad with Alloy 625 |
Membrane wall in combustion room – lower area | | |
Membrane wall in combustion room – higher area | | |
| | |
| » Pipe walls and single tubes in P235GH, 15Mo3, 13CrMo44, 10CrMo910 |
| » Alloy 622 (US), alloy 625, alloy 686 (super heater tubes)
» Coating alternatives under investigation: metal powder, ceramic, galvanizing |
| » 4-component shielding gas: He = 32 %, H2 = 2 %, CO2 = 0.05 %, remainder Ar » Alternative choices of shielding gas |
| » GMAweldingequipmentwithpulsed-currentpowersources » Automatic burner processing |
| » Vertical down position preferred, layer width 15 - 20 mm |
| » On-site in the boiler with mobile welding equipment, minimum wall
thickness 3 mm » Welding in the workshop weld metal overlay on new pipe walls and
single tubes |
| » Overlay thickness 2 mm » Two layers preferred » Sandblastingoftheweldingsurface » Water circulation in the tubes » Content of Fe in welding surface < 5 % » Content of Fe in welding material < 1 % » Consider shrinkage » End of cladding round-welded with TIG, notch-free
|
The most common problem in surfacing is cracking. The main methods
to prevent cracking are as follows
1. Preheat before welding, control interlayer temperature and slow
cooling after welding
2. Stress relief heat treatment after welding
3. Avoid multi-layer surfacing and use low hydrogen surfacing
electrode
4. If necessary, build up the transition layer between the
surfacing layer and the base metal (use the electrode with low
carbon equivalent and high toughness)
Attention must be paid to butt welding:
1. According to the use requirements, reasonable selection of
surfacing alloy
2. Reduce the dilution ratio of base metal as much as possible
3. Improve productivity
4. It is expected that the hardfacing metal and base metal have
similar expansion coefficient and phase transformation temperature
Purpose of Inconel Cladding on surface :
1. Extend service life
2. Reduce costs
3. Reduce spare parts
4. Reduce maintenance
Our Service
High-quality products supplier
Customized products
Flexible requirements for order size
Diverse products
Competitive price
Professional technical and quality team
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RFQ
Q: Are you trading company or manufacturer ?
Q: How long is your delivery time?
A: Generally 5-10 days if the goods are in stock. or 25-35days if
the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample extra
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30%
T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
