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Question Metco 5P II Parameters (Metco 308)
Posted by: tobjung - 11-15-2021, 05:23 PM - Forum: Surface Engineering Threads - No Replies

Dear Forum,

I bought used Metco 5P II recently. Unfortunately, the manuals have been misplaced by predecessor.
Therefore, I don't have any technical bulletin with me. If anybody can provide me with those bulletin please. (Metco 308 especially)
It would be  much appreciated.

Thank you
Happy0193

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  Compare between Arc-Spraying and HVOF
Posted by: reyesryder - 10-20-2021, 04:17 AM - Forum: Surface Engineering Threads - Replies (1)

Hi everyone,

I compare between Arc-Spraying and HVOF to rebuild wear in the journal bearing areas of generator shaft of steam turbine:

The shaft RPM is 3000
Operating temperature is 90c
Material is 42CrMo4
Hardness required is 37 HRC

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  Diamond Belt Grinding Tool Post Grinding and Polishing
Posted by: Stephen Booth - 10-18-2021, 05:32 AM - Forum: Products and Services - Replies (4)


.pdf   KGS M1 Tool Post Grinder Diamond Grinding.pdf (Size: 445.63 KB / Downloads: 42) FAST AND ACCURATE ROLL GRINDING & FINISHING of HVOF Carbide Coatings

FAST AND ACCURATE DIAMOND BELT ROLL GRINDING & FINISHING from KGS
Diamond tools for rolls and cylinders Belts, strips and lapping films for grinding, removing and polishing of cylinders with hard coatings. Flexible diamond tools are easier to use, require less  operators skills, for more consistent and predictable results!

KGS Swiss launches a new line of Belt Grinders, tool post mounting. KGS DIAMOND  and I are promoting KGS Diamond Belts and belt grinders.  If you ever find need for HVOF hard coatings and grinding

If interested, let me know and I will get the local KGS professional to contact to you….  Stephen.booth@bexxonglobal.com[Image: fe29fb0b624567dbb927d57159c89778?AccessK...oworigin=1]

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  Metco 45VF-NS Finishing
Posted by: Steven P - 10-13-2021, 09:27 AM - Forum: Surface Engineering Threads - Replies (2)

Hi everyone. 

One of my clients has requested some advice on what method he can use to finish a coated diameter of Metco 45VF-NS applied by APS. 

He has a full suite of grinding and machining facilities available to him.

Any ideas or recommendations are gratefully received.

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  TAFA 8830/8835 manual
Posted by: strogonovd94 - 09-27-2021, 02:08 PM - Forum: Products and Services - No Replies

Hello!

Does anyone have a manual (for pistol or whole system) for TAFA 8830 (8835) or others gun?

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Lightbulb Metco 58NS CuNiIn Interface Problem
Posted by: johnrafiee - 09-09-2021, 10:12 AM - Forum: Surface Engineering Threads - Replies (8)

Dear member 

I am looking for a way to reduce/eliminate interface separation/oxide/voiding/cracking in plasma sprayed Cu-Ni-In Metco 58 NS. 
During our initial spray a years ago, we did not found any of this defect. It keep building up time to time with the same parameter.


Spray parameter as follow

Gun Type : SinplexPro 90
Nozzle Diameter, Ø : 9 mm
Powder Injector Diameter, Ø : 1.8 mm
Powder Injector Angle : 90°
Current : 380 Amps
Primary Gas, Argon : 45 NLPM
Secondary Gas, Hydrogen : 2 NLPM
Powder Carrier Gas, Argon : 2 NLPM
Powder Feedrate : 40 g/min
Spreader/Suction Type : NL 16/1.2
Stirrer Speed : 60%
Spray Distance : 90mm
Rotation Speed : 50RPM
TCP Speed : 1000mm/min

Surface preparation were made with Grade 70 aluminum oxide with roughness around Ra 2-4um applied to Ti 6Al-4V substrate. Edge has been round off to ensure risk of edge seperation can be reduced.

The problem now we found an oxide, seperation and cracking at the coating near the interface on certain FOV. Can refer to my photo attachment

We had done many try and error such as etch after blast, preheat the substrate prior to spray, preheat the powder before spray but the problem still insist


For metallurgy preparation, 

The test panel was directly mounted using epoxy with vacuum impregnation. No sectioning was made

Planar grind with 180 SiC and Fine grind from 220 until 4000 SiC,
2 minutes 1um diamond polishing with Silk and 45 Second OP-S with Nap Cloth. 
No change to grinding and polishing parameter since day 1st of spray.


<a href="https://ibb.co/SBvPdFd"><img src="https://i.ibb.co/SBvPdFd/1-branch-cracking.jpg" alt="1-branch-cracking" border="0"></a>

<a href="https://ibb.co/ZWb1SQQ"><img src="https://i.ibb.co/FgdqXQQ/2-kicrocrack.jpg" alt="2-kicrocrack" border="0"></a>

<a href="https://ibb.co/MnqPvWT"><img src="https://i.ibb.co/mJQhj1s/6-crack.jpg" alt="6-crack" border="0"></a>

<a href="https://ibb.co/0j5K2RC"><img src="https://i.ibb.co/0j5K2RC/2-branch-cracking.jpg" alt="2-branch-cracking" border="0"></a>

<a href="https://ibb.co/SBvPdFd"><img src="https://i.ibb.co/SBvPdFd/1-branch-cracking.jpg" alt="1-branch-cracking" border="0"></a>

Appreciate all the opinion and idea. Thank you

[Image: SBvPdFd][Image: ZWb1SQQ][Image: MnqPvWT][Image: 0j5K2RC][Image: SBvPdFd]

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  The frame of JP-8000 is blinking.
Posted by: Hoon Lee - 09-07-2021, 08:08 AM - Forum: Surface Engineering Threads - No Replies

Hi I'm Hoon Lee.

I've been using the DJ2700 from Metco.

For testing, I went to another laboratory and saw JP-8000.

I think the frame of JP-8000 was blinking but no one there was questioning it.

It was similar to the old lights flashing endlessly. Um...Like club light?
Sorry I can't describe it exactly. But obviously the flames blinked very quickly. 
Sign0013

If there are people working with JP-8000, does it blink originally?

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  Thermal arc spray for sale
Posted by: Leeboy007 - 08-30-2021, 05:04 PM - Forum: Products and Services - Replies (1)

Selling my metallisation arc spray 
140/350 3 phase 
Needs new contacts on the gun and new hose. Price £4000.00 UK 
private message if interested 


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  Surface corrosion when HVOF spraying
Posted by: vcduramais - 08-19-2021, 04:55 PM - Forum: Surface Engineering Threads - Replies (4)

Dear all, how are you?

As can be seen in the attached photo, I'm having surface oxidation problem when applying carbide coatings by HVOF, with a DJ-2700 gun.

The region adjacent to the coating is turning greenish. This problem is very serious in pieces similar to the one in the photo, as I have to coat both sides (a and b). It can be seen in image (b) - side I coated first - that the entire surface looked like this after side (a) was coated.

Before coating, the piece was heated to 80°C and then blasted with brown aluminum oxide.

The coating was carried out as follows:
O2: 280 lpm;
C3H6: 80lpm;
Air: 440 lpm;
N2: 15-20 lpm;
Powder: WOKA 7205;
FR: 45 gpm;
Distance: ~250mm (manual application);
Start temperature: ~50°C;
Standby temperature: ~150°C;
Part speed: 80-150 m/min (ring).

The problem appears right at the beginning of the coating and several pieces (which I don't have a photographic record) have this problem.

Have any of you been through something similar or do you have any information you can share about it?

Thank you very much for your attention.



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  AMST Twin Wire Arc Spray Systems
Posted by: Manju_AMST - 07-01-2021, 04:23 AM - Forum: Products and Services - No Replies

AMST introduces new series of Twin Wire Arc Spray system in 200 Amps, 300 Amps, 400 Amps and 600 Amps. The systems are available with choice of wire feed drive guns i.e pneumatic drive or DC drives with Robot integration. For more information of quote, please write to sales@alloymstech.com or marketing@alloymstech.com. 



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