Welcome, Guest
You have to register before you can post on our site.

Username
  

Password
  





Search Forums

(Advanced Search)

Forum Statistics
» Members: 3,046
» Latest member: johnrafiee
» Forum threads: 2,632
» Forum posts: 10,622

Full Statistics

Online Users
There are currently 27 online users.
» 0 Member(s) | 27 Guest(s)

Latest Threads
Thermal arc spray for sal...
Forum: Products and Services
Last Post: Leeboy007
09-22-2021, 10:08 AM
» Replies: 1
» Views: 189
Metco 58NS CuNiIn Interfa...
Forum: Surface Engineering Threads
Last Post: johnrafiee
09-20-2021, 06:37 AM
» Replies: 8
» Views: 348
The frame of JP-8000 is b...
Forum: Surface Engineering Threads
Last Post: Hoon Lee
09-07-2021, 08:08 AM
» Replies: 0
» Views: 118
Surface corrosion when HV...
Forum: Surface Engineering Threads
Last Post: vcduramais
08-20-2021, 11:25 AM
» Replies: 4
» Views: 356
Presentation
Forum: Introductions and Member Survey
Last Post: ErikMyers
08-08-2021, 12:13 PM
» Replies: 0
» Views: 93
Coating Thickness Measure...
Forum: Surface Engineering Threads
Last Post: Lemster68
08-06-2021, 04:14 PM
» Replies: 3
» Views: 2,089
16C-NS cracking issue
Forum: Surface Engineering Threads
Last Post: Stephen Booth
08-04-2021, 02:43 AM
» Replies: 31
» Views: 3,946
Cold Spray Process Develo...
Forum: Products and Services
Last Post: Stephen Booth
07-30-2021, 04:18 AM
» Replies: 2
» Views: 1,300
Looking for a used arc sp...
Forum: Products and Services
Last Post: Leeboy007
07-26-2021, 01:07 PM
» Replies: 7
» Views: 4,835
HVOF Coating Calender Rol...
Forum: Surface Engineering Threads
Last Post: tobjung
07-24-2021, 08:53 AM
» Replies: 4
» Views: 1,127
Factors affecting the per...
Forum: Other Topics
Last Post: karenburton1305
07-20-2021, 04:32 PM
» Replies: 1
» Views: 1,790
An engineering forum webs...
Forum: Other Topics
Last Post: morganjin
07-16-2021, 11:41 AM
» Replies: 12
» Views: 15,346
Discussion on SEF Article...
Forum: Papers, Articles and Links
Last Post: Gordon
07-15-2021, 08:40 AM
» Replies: 11
» Views: 14,744
Metco FMR unit conversion
Forum: Surface Engineering Threads
Last Post: J!m
07-13-2021, 04:33 PM
» Replies: 5
» Views: 13,688
Electron-beam physical va...
Forum: Surface Engineering Threads
Last Post: Daneizer
07-09-2021, 05:58 PM
» Replies: 5
» Views: 1,389
Crack indication Stellite...
Forum: Surface Engineering Threads
Last Post: Stephen Booth
07-07-2021, 07:19 AM
» Replies: 5
» Views: 2,256
AMST Twin Wire Arc Spray ...
Forum: Products and Services
Last Post: Manju_AMST
07-01-2021, 04:23 AM
» Replies: 0
» Views: 238
Epoxy Sealants for Cerami...
Forum: Surface Engineering Threads
Last Post: DMan
06-27-2021, 11:39 AM
» Replies: 0
» Views: 466
Mathematical Optimization...
Forum: Other Topics
Last Post: Tanisha
06-25-2021, 08:37 PM
» Replies: 5
» Views: 10,956
Holy Grail of Mechanical ...
Forum: Other Topics
Last Post: CarmeloLabadie
06-25-2021, 05:49 PM
» Replies: 0
» Views: 248

 
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]

Print this item

  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?

Print this item

  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 


Print this item

  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.



Attached Files Thumbnail(s)
   
Print this item

  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. 



Attached Files Thumbnail(s)
   
Print this item

  Epoxy Sealants for Ceramic Chromium Oxide
Posted by: DMan - 06-27-2021, 11:39 AM - Forum: Surface Engineering Threads - No Replies

Dear All

Can anyone suggest a good Epoxy Sealant for Ceramic Chromium Oxide Coatings by Plasma Spray.
Any good reference will be helpful.
I have been using Diamant Dichtol but want some other alternatives to see if i get some other better options
Note : I have to grind/polish  the part after applying the sealant...

Warm Regards
Dman.

Print this item

  Looking suggestion for S2B "Z" notch coating & dove tail ARC spray aluminium coating
Posted by: demionkrishan - 06-14-2021, 02:09 PM - Forum: Surface Engineering Threads - No Replies

Dear thermal spray family, 
Is anyone here, doing Gas turbine stage 2 bucket plasma "Z" notch and dovetail Arc spray aluminium coating?
 I am totally new to this subject and I feel personally, it is time consuming process to mask the whole area with plasma tape to coat a very small area. The time for masking per piece is on an average 15 minutes, is there any way to reduce time or any other methods? Appreciate your valuable feedback 🙏

Print this item

  MIL-STD-869D TYPE III
Posted by: joe plasma - 06-11-2021, 08:03 PM - Forum: Surface Engineering Threads - Replies (3)

Hello All,

Does anyone know what type of system is used for:

MIL-STD-869D 
Type III
Powder: Plasma process for spraying materials in a powder form utilizing a non-transferable electric arc with nitrogen. Argon and Helium as a secondary gas with or without hydrogen.


Can I use a 9MC console with 9MB gun and 9MP powder feeder?

The type of powder to be sprayed will be 73F-NS-1.

Print this item

  Buy a plasma system
Posted by: kaizmoto1489 - 06-07-2021, 04:34 AM - Forum: Surface Engineering Threads - No Replies

Hello everyone,

I am going to buy one plasma system but not decide the model and brand yet.
I have considered 3 options:

1. 100HE from Progressive
2. Sinplex from Metco
3. KK gun from AMT

Base on my experience, 9MB is more stable than 100HE,but at that time the 100HE system is assembled with TAFA system and 100HE torch.
I am not sure if the original setup can help the plasma system more stable?

Print this item

  used 11MB gun for sale (24")
Posted by: KevGarty - 05-25-2021, 03:50 AM - Forum: Products and Services - Replies (2)

We have an 11MB (24") that is surplus to our needs. Gun was purchased for around $20k (AUD) for a project that sprayed a total of 6 jobs and hasn't been used since (2015)

Open to offers 

Located in Brisbane Australia. Contact for Photo's 

Cheers

Print this item






Surface Engineering Forum Sponsor - Alphatek Hyperformance Coatings Ltd