<![CDATA[Surface Engineering Forum - All Forums]]> http://www.gordonengland.co.uk/sef/ Tue, 07 Feb 2012 11:36:09 +0000 MyBB <![CDATA[ cable ties]]> http://www.gordonengland.co.uk/sef/Thread-cable-ties Tue, 07 Feb 2012 07:10:07 +0000 http://www.gordonengland.co.uk/sef/Thread-cable-ties
cable ties]]>
cable ties]]> <![CDATA[Sleeve Coating]]> http://www.gordonengland.co.uk/sef/Thread-Sleeve-Coating Mon, 06 Feb 2012 14:05:49 +0000 http://www.gordonengland.co.uk/sef/Thread-Sleeve-Coating
We have a part of pomp sleeve.

Working conditions:

Pure Water 140 C
Abrasive materials: Plastic o-rings
The Ceramics coating was applied but efficiency could be obtained.

We are planing to coat CrC/NiCr with HVOF. But do you have Any other suggestions?

Thanks.]]>
We have a part of pomp sleeve.

Working conditions:

Pure Water 140 C
Abrasive materials: Plastic o-rings
The Ceramics coating was applied but efficiency could be obtained.

We are planing to coat CrC/NiCr with HVOF. But do you have Any other suggestions?

Thanks.]]> <![CDATA[how can i find WC10Co4Cr propreties ?]]> http://www.gordonengland.co.uk/sef/Thread-how-can-i-find-WC10Co4Cr-propreties Fri, 03 Feb 2012 15:02:48 +0000 http://www.gordonengland.co.uk/sef/Thread-how-can-i-find-WC10Co4Cr-propreties i want to ask you how can i find:
- solid specific heat
- solid lambda
- melting point
- latent melting heat
for this carbide powder WC10Co4Cr ?

Thank you !
Best regards, Vlad !]]> i want to ask you how can i find:
- solid specific heat
- solid lambda
- melting point
- latent melting heat
for this carbide powder WC10Co4Cr ?

Thank you !
Best regards, Vlad !]]> <![CDATA[Metco Arc Extension]]> http://www.gordonengland.co.uk/sef/Thread-Metco-Arc-Extension Wed, 01 Feb 2012 23:00:54 +0000 http://www.gordonengland.co.uk/sef/Thread-Metco-Arc-Extension
Would anyone have a copy of the Parts list for a Metco PPGT1-90° arc extension for spraying internal diameters ?

It would be much appreciated

Cheers

Kev]]>
Would anyone have a copy of the Parts list for a Metco PPGT1-90° arc extension for spraying internal diameters ?

It would be much appreciated

Cheers

Kev]]> <![CDATA[Employment wanted]]> http://www.gordonengland.co.uk/sef/Thread-Employment-wanted Sat, 28 Jan 2012 10:38:24 +0000 http://www.gordonengland.co.uk/sef/Thread-Employment-wanted My name is Robert Low a thermal sprayer with 15 years experience. I am based in Aberdeen Scotland and I am currently looking for employment anywhere in the UK, Europe or the Middle East. Thanks.]]> My name is Robert Low a thermal sprayer with 15 years experience. I am based in Aberdeen Scotland and I am currently looking for employment anywhere in the UK, Europe or the Middle East. Thanks.]]> <![CDATA[electroplating Graphite]]> http://www.gordonengland.co.uk/sef/Thread-electroplating-Graphite Wed, 25 Jan 2012 21:24:44 +0000 http://www.gordonengland.co.uk/sef/Thread-electroplating-Graphite
here are a few pics(not plated but just rubbed onto a glossy surface)
[Image: WhiteBaseSpoon1.jpg]

so after that, I tried to elctroplate the same plastic spoons with nickel.
[Image: RealNickelSpoon2.jpg] the only prep was a spray degreaser and pickling. could not touch the surface too much as the graphite layer is very thin.

now here is the issue. the nickel plated well to the thin graphite surface, but the graphite surface was not sticking to the glossy surface. so you can actually peel the nickel off without much effort
[Image: RealNickelSpoon3.jpg]

my next step was to try on a rough surface and its actually holding very well, but the nickel does not look shiny as before..
[Image: nickelplatedspoon5.jpg]
[Image: nickelplatedspoon4.jpg]
[Image: nickelplatedspoon1.jpg]

now here is my question and I hope I placed it in the correct subforum.
what can I do to get graphite powder to stick to a glossy surface? maybe a microscopy acid etching?

Thanks
Marvin]]>
here are a few pics(not plated but just rubbed onto a glossy surface)
[Image: WhiteBaseSpoon1.jpg]

so after that, I tried to elctroplate the same plastic spoons with nickel.
[Image: RealNickelSpoon2.jpg] the only prep was a spray degreaser and pickling. could not touch the surface too much as the graphite layer is very thin.

now here is the issue. the nickel plated well to the thin graphite surface, but the graphite surface was not sticking to the glossy surface. so you can actually peel the nickel off without much effort
[Image: RealNickelSpoon3.jpg]

my next step was to try on a rough surface and its actually holding very well, but the nickel does not look shiny as before..
[Image: nickelplatedspoon5.jpg]
[Image: nickelplatedspoon4.jpg]
[Image: nickelplatedspoon1.jpg]

now here is my question and I hope I placed it in the correct subforum.
what can I do to get graphite powder to stick to a glossy surface? maybe a microscopy acid etching?

Thanks
Marvin]]> <![CDATA[Newbie Spray Question]]> http://www.gordonengland.co.uk/sef/Thread-Newbie-Spray-Question--1783 Wed, 25 Jan 2012 18:15:45 +0000 http://www.gordonengland.co.uk/sef/Thread-Newbie-Spray-Question--1783 <![CDATA[Newbie Spray Question]]> http://www.gordonengland.co.uk/sef/Thread-Newbie-Spray-Question Wed, 25 Jan 2012 18:15:43 +0000 http://www.gordonengland.co.uk/sef/Thread-Newbie-Spray-Question <![CDATA[Spray Wire]]> http://www.gordonengland.co.uk/sef/Thread-Spray-Wire Wed, 25 Jan 2012 00:47:58 +0000 http://www.gordonengland.co.uk/sef/Thread-Spray-Wire
I have a request to source a wire for ARC and or Flame Spray, however all I have is the composition

Fe Bal Cr 10% Al 7% Mo 5% Ni 5%

Does anyone recognise this ?

I'd appreciate any help

Muchas Gracias

Kev]]>
I have a request to source a wire for ARC and or Flame Spray, however all I have is the composition

Fe Bal Cr 10% Al 7% Mo 5% Ni 5%

Does anyone recognise this ?

I'd appreciate any help

Muchas Gracias

Kev]]> <![CDATA[Help on sulzer metco parts]]> http://www.gordonengland.co.uk/sef/Thread-Help-on-sulzer-metco-parts Tue, 24 Jan 2012 06:41:30 +0000 http://www.gordonengland.co.uk/sef/Thread-Help-on-sulzer-metco-parts
If anyone can help me to the value of these(new in tubes) and if someone would be interested please let me know. They are the last of my liquidation and I'm stumped!

Thanks everyone]]>
If anyone can help me to the value of these(new in tubes) and if someone would be interested please let me know. They are the last of my liquidation and I'm stumped!

Thanks everyone]]> <![CDATA[WC/Co Coating Microstructure]]> http://www.gordonengland.co.uk/sef/Thread-WC-Co-Coating-Microstructure Wed, 18 Jan 2012 14:21:32 +0000 http://www.gordonengland.co.uk/sef/Thread-WC-Co-Coating-Microstructure
Again - old subject in the forum but new for me. We are recently working on develop HVOF coating with customer approved powders - Metco 5847 and Praxair WC-731-1. Tensile, bond strength, microstructure and micro hardness required. We couldn't get required min 950HV0,3 hardness with Praxair powder in any configuration, so right we are testing Metco 5847. We get tensile and micro hardness, porosity also good but "clusters" in coating appears, which customer is not happy about. What are those clusters might be and how can we eliminate it from coating.

Thank You very much for help.

[Image: dc1a1e6156fc798b.jpg]

Admin Edit - This is a new thread split from http://www.gordonengland.co.uk/sef/Threa...rs-by-HVOF and for continuity a few quotes from earlier posts:

(11-08-2009 05:53 AM)k09 Wrote:  Hi,

I cant use Plasma.. Their product specification clearly specifies HVOF!! So option of using another process is ruled out Sad

My colleagues suggested that the higher hardness range is due to over heating of the sprayed particles. So to counter this i will have reduce the fuel and oxygen input. Am i goin in the right direction here??!

Also, if i am to reduce it...How much shud i reduce it...1-2% or should it be as high as 5-10%

Whatever the case, I have no doubts that i will have to conduct all tests again!Sad

(11-21-2009 04:06 PM)Gordon Wrote:  Hi K09

Quote:My colleagues suggested that the higher hardness range is due to over heating of the sprayed particles.

This is certainly a possibility. Production of metastable phases can harden and make the supporting matrix more brittle. Increased hardness and reduced ductility of the CoCr matrix can show itself sometimes (not always) as a harder coating as a whole, this condition tends to have negative effects on durability and wear resistance of the coating.

Do you have any (other than hardness) indications towards over-heating and production of unwanted phases? Hardness alone is not a good indicator.

Quote:So to counter this i will have reduce the fuel and oxygen input. Am i goin in the right direction here??!

Also, if i am to reduce it...How much shud i reduce it...1-2% or should it be as high as 5-10%

This is difficult to answer, as I don't know your base line conditions. Also, you need to be sure that the higher coating hardness (according to your customer specification) that you are achieving is due to particle over-heating and is not just the natural results of good process/coating.

You could manipulate parameters to give softer coatings and make people happy that specifications are being met, but without knowing exactly what is going on inside the coating, you could end up with poorer coating. Just seems possibly a retrograde step.

(11-24-2009 06:11 AM)k09 Wrote:  Hi Gordon,

Can microstructure images help in making any conclusions in this matter?

I have a report which includes results of Microstructure, Bend test, Bond Strength and Hardness test. All results are positive. The testing facility infact, in a telephone conversation also commented that the coating appeared better than Detonation spray coatings!

If microstructure can help, i will forward you a copy of the image for analysisSmile

(11-25-2009 04:00 PM)Gordon Wrote:  Hi K09

It can be difficult to see the more subtle effects in normal metallography. In more extreme cases, primary WC phases may appear reduced and matrix increased. A very qualitative method I have used is to etch samples with a modified Murakami's reagent (basically a diluted form). The ideal coating, one with no other phases than WC and CoCr matrix will show no or little etching effects. Unwanted phases tend to be vigorously etched. It is not a pretty etch and can spoil samples if you need to archive or process further, so I would advise making a separate specimen/mount for this purpose or at least leaving this test to the very last.
]]>
Again - old subject in the forum but new for me. We are recently working on develop HVOF coating with customer approved powders - Metco 5847 and Praxair WC-731-1. Tensile, bond strength, microstructure and micro hardness required. We couldn't get required min 950HV0,3 hardness with Praxair powder in any configuration, so right we are testing Metco 5847. We get tensile and micro hardness, porosity also good but "clusters" in coating appears, which customer is not happy about. What are those clusters might be and how can we eliminate it from coating.

Thank You very much for help.

[Image: dc1a1e6156fc798b.jpg]

Admin Edit - This is a new thread split from http://www.gordonengland.co.uk/sef/Threa...rs-by-HVOF and for continuity a few quotes from earlier posts:

(11-08-2009 05:53 AM)k09 Wrote:  Hi,

I cant use Plasma.. Their product specification clearly specifies HVOF!! So option of using another process is ruled out Sad

My colleagues suggested that the higher hardness range is due to over heating of the sprayed particles. So to counter this i will have reduce the fuel and oxygen input. Am i goin in the right direction here??!

Also, if i am to reduce it...How much shud i reduce it...1-2% or should it be as high as 5-10%

Whatever the case, I have no doubts that i will have to conduct all tests again!Sad

(11-21-2009 04:06 PM)Gordon Wrote:  Hi K09

Quote:My colleagues suggested that the higher hardness range is due to over heating of the sprayed particles.

This is certainly a possibility. Production of metastable phases can harden and make the supporting matrix more brittle. Increased hardness and reduced ductility of the CoCr matrix can show itself sometimes (not always) as a harder coating as a whole, this condition tends to have negative effects on durability and wear resistance of the coating.

Do you have any (other than hardness) indications towards over-heating and production of unwanted phases? Hardness alone is not a good indicator.

Quote:So to counter this i will have reduce the fuel and oxygen input. Am i goin in the right direction here??!

Also, if i am to reduce it...How much shud i reduce it...1-2% or should it be as high as 5-10%

This is difficult to answer, as I don't know your base line conditions. Also, you need to be sure that the higher coating hardness (according to your customer specification) that you are achieving is due to particle over-heating and is not just the natural results of good process/coating.

You could manipulate parameters to give softer coatings and make people happy that specifications are being met, but without knowing exactly what is going on inside the coating, you could end up with poorer coating. Just seems possibly a retrograde step.

(11-24-2009 06:11 AM)k09 Wrote:  Hi Gordon,

Can microstructure images help in making any conclusions in this matter?

I have a report which includes results of Microstructure, Bend test, Bond Strength and Hardness test. All results are positive. The testing facility infact, in a telephone conversation also commented that the coating appeared better than Detonation spray coatings!

If microstructure can help, i will forward you a copy of the image for analysisSmile

(11-25-2009 04:00 PM)Gordon Wrote:  Hi K09

It can be difficult to see the more subtle effects in normal metallography. In more extreme cases, primary WC phases may appear reduced and matrix increased. A very qualitative method I have used is to etch samples with a modified Murakami's reagent (basically a diluted form). The ideal coating, one with no other phases than WC and CoCr matrix will show no or little etching effects. Unwanted phases tend to be vigorously etched. It is not a pretty etch and can spoil samples if you need to archive or process further, so I would advise making a separate specimen/mount for this purpose or at least leaving this test to the very last.
]]> <![CDATA[Rokide]]> http://www.gordonengland.co.uk/sef/Thread-Rokide Tue, 17 Jan 2012 15:24:55 +0000 http://www.gordonengland.co.uk/sef/Thread-Rokide
I am awaiting your answer.

Best Regards]]>
I am awaiting your answer.

Best Regards]]> <![CDATA[Better deposition without changing parameters and feedrate?]]> http://www.gordonengland.co.uk/sef/Thread-Better-deposition-without-changing-parameters-and-feedrate Sat, 14 Jan 2012 08:06:54 +0000 http://www.gordonengland.co.uk/sef/Thread-Better-deposition-without-changing-parameters-and-feedrate im new in plasma spray.
Currently working in a production line doing plasma spray.

Mainly using F4 gun for spraying.
Frequently using among metco 313, 601, 320..... and some hard coatings.

I would like to know is there anyways to improve the depostion buildup per cycle without changing the parameters and feedrate and able to get the required hardness?

Because for production, there will be time reduction every year.

Theres no engineer here to do process improvement, so the only way here is to work faster so that to be able to finish the part in time.

Thanks for reading.
Hope to get some help..... cheers~]]> im new in plasma spray.
Currently working in a production line doing plasma spray.

Mainly using F4 gun for spraying.
Frequently using among metco 313, 601, 320..... and some hard coatings.

I would like to know is there anyways to improve the depostion buildup per cycle without changing the parameters and feedrate and able to get the required hardness?

Because for production, there will be time reduction every year.

Theres no engineer here to do process improvement, so the only way here is to work faster so that to be able to finish the part in time.

Thanks for reading.
Hope to get some help..... cheers~]]> <![CDATA[uneven Wc coating thickness]]> http://www.gordonengland.co.uk/sef/Thread-uneven-Wc-coating-thickness Wed, 11 Jan 2012 04:31:43 +0000 http://www.gordonengland.co.uk/sef/Thread-uneven-Wc-coating-thickness The hoses all run straight to the gun and everything is fine when I do a leak test. Not sure if there is more to check with the gun or if it is in the setup or traverse.
It is very frustrating...]]> The hoses all run straight to the gun and everything is fine when I do a leak test. Not sure if there is more to check with the gun or if it is in the setup or traverse.
It is very frustrating...]]> <![CDATA[Need help to improve coating Metco 101B-NS]]> http://www.gordonengland.co.uk/sef/Thread-Need-help-to-improve-coating-Metco-101B-NS Tue, 10 Jan 2012 15:18:27 +0000 http://www.gordonengland.co.uk/sef/Thread-Need-help-to-improve-coating-Metco-101B-NS
The reason for this post is to ask your help to improve the coating 101B NS, the problem is that the coating has been presenting delamination.

As you can see in the picture, the delamination was observed throughout the coating.

http://i43.tinypic.com/epo90.png

Due to the configuration of the part to be coated, the gun moves at angles of 45 and 23 degrees.

Please let me know if you need more information so that you can give me recommendations.

Thank you.Wink]]>
The reason for this post is to ask your help to improve the coating 101B NS, the problem is that the coating has been presenting delamination.

As you can see in the picture, the delamination was observed throughout the coating.

http://i43.tinypic.com/epo90.png

Due to the configuration of the part to be coated, the gun moves at angles of 45 and 23 degrees.

Please let me know if you need more information so that you can give me recommendations.

Thank you.Wink]]> <![CDATA[Natural Good, Chemical Bad – Right?]]> http://www.gordonengland.co.uk/sef/Thread-Natural-Good-Chemical-Bad-%E2%80%93-Right Tue, 10 Jan 2012 07:26:20 +0000 http://www.gordonengland.co.uk/sef/Thread-Natural-Good-Chemical-Bad-%E2%80%93-Right
Such is the creed that has grown up around natural products. You want to market a new range of face cream –- make sure everyone knows it is natural. You want your expensive new yogurt to sell –- include the word “natural” on the packaging. The word “natural” has become byword for purity, health and goodness.

ChemicalsSo, why are we so obsessed by natural products? It may be that we associate science with all that is bad in the modern world –- pollution, climate change, the nuclear threat. By rejecting science and its associated chemicals, perhaps we believe that we can return to a gentler time in which the honest farmer toiled the land and people’s lives were more in tune with nature. While it is true that we have drifted away from nature, largely to the detriment of the health of the planet, this view is in danger of romanticizing the past into a golden age that never really existed. At the start of the nineteenth century, global average life expectancy was less than 30 years; today it is around 67. The infant mortality rate in Europe in the 1860s was around 230 per 1,000, compared with less than 50 per 1,000 in the 1950s. If you asked parents of the nineteenth century whether they wanted their child to be vaccinated against the ravages of polio, they wouldn’t understand why you even needed to ask.

The current generation living in the Western world is the luckiest in history. We have forgotten what it is like to be surrounded by death, disease and infirmity. It is because we enjoy such comfort and security that we find ourselves in a position to be picky about what we eat, wear and put on our bodies. We demand that things be natural only because science has given us that luxury.

I am not arguing that natural is bad; I am simply saying that just because something is natural, it does not make it good. Even more, I am objecting to the artificial and facile distinction between natural and chemical. If you analyze a banana, you find 39 chemicals, including 2-heptyl acetate, isoamyl acetate. 2-methylbutyl acetate and 2-heptyl acetate. Try putting this list of ingredients on a package label and see how much you sell.

The separation into natural versus chemical may be tempting, it may be convenient, but I don’t believe it’s actually helpful. Some people may find this argument gives them a headache — in which case they may like to chew on the bark of a willow. Personally, I’d rather take a couple of aspirin.]]>
Such is the creed that has grown up around natural products. You want to market a new range of face cream –- make sure everyone knows it is natural. You want your expensive new yogurt to sell –- include the word “natural” on the packaging. The word “natural” has become byword for purity, health and goodness.

ChemicalsSo, why are we so obsessed by natural products? It may be that we associate science with all that is bad in the modern world –- pollution, climate change, the nuclear threat. By rejecting science and its associated chemicals, perhaps we believe that we can return to a gentler time in which the honest farmer toiled the land and people’s lives were more in tune with nature. While it is true that we have drifted away from nature, largely to the detriment of the health of the planet, this view is in danger of romanticizing the past into a golden age that never really existed. At the start of the nineteenth century, global average life expectancy was less than 30 years; today it is around 67. The infant mortality rate in Europe in the 1860s was around 230 per 1,000, compared with less than 50 per 1,000 in the 1950s. If you asked parents of the nineteenth century whether they wanted their child to be vaccinated against the ravages of polio, they wouldn’t understand why you even needed to ask.

The current generation living in the Western world is the luckiest in history. We have forgotten what it is like to be surrounded by death, disease and infirmity. It is because we enjoy such comfort and security that we find ourselves in a position to be picky about what we eat, wear and put on our bodies. We demand that things be natural only because science has given us that luxury.

I am not arguing that natural is bad; I am simply saying that just because something is natural, it does not make it good. Even more, I am objecting to the artificial and facile distinction between natural and chemical. If you analyze a banana, you find 39 chemicals, including 2-heptyl acetate, isoamyl acetate. 2-methylbutyl acetate and 2-heptyl acetate. Try putting this list of ingredients on a package label and see how much you sell.

The separation into natural versus chemical may be tempting, it may be convenient, but I don’t believe it’s actually helpful. Some people may find this argument gives them a headache — in which case they may like to chew on the bark of a willow. Personally, I’d rather take a couple of aspirin.]]> <![CDATA[Stellite 6 welding rods]]> http://www.gordonengland.co.uk/sef/Thread-Stellite-6-welding-rods Fri, 06 Jan 2012 07:07:06 +0000 http://www.gordonengland.co.uk/sef/Thread-Stellite-6-welding-rods
Thank you]]>
Thank you]]> <![CDATA[Mettech Triplex System for sale]]> http://www.gordonengland.co.uk/sef/Thread-Mettech-Triplex-System-for-sale Wed, 04 Jan 2012 20:02:09 +0000 http://www.gordonengland.co.uk/sef/Thread-Mettech-Triplex-System-for-sale we have a complete Mettech Triplex system approximately 15 years old for sale, or will sell the major components of the system seperately which comprises of 3 x ESAB 600C Power Supplies, Mitsubishi PLC and various Mass Flow Controllers.

any information required please contact Lee.

lee@universalthermal.co.uk

Happy, Healthy and hopefully a Prosperous New Year to all!]]> we have a complete Mettech Triplex system approximately 15 years old for sale, or will sell the major components of the system seperately which comprises of 3 x ESAB 600C Power Supplies, Mitsubishi PLC and various Mass Flow Controllers.

any information required please contact Lee.

lee@universalthermal.co.uk

Happy, Healthy and hopefully a Prosperous New Year to all!]]> <![CDATA[Metco 9MB Gun]]> http://www.gordonengland.co.uk/sef/Thread-Metco-9MB-Gun Wed, 04 Jan 2012 04:55:48 +0000 http://www.gordonengland.co.uk/sef/Thread-Metco-9MB-Gun The Sulzer Metco 9MB gun has foront insulator for Ar gas.
It is designed two type, 2-hole and 6-hole.
My question as follow:
Why are there designed to 2 hole or 6 hole?
Are there have special features?
Thanks!Ashamed0002]]> The Sulzer Metco 9MB gun has foront insulator for Ar gas.
It is designed two type, 2-hole and 6-hole.
My question as follow:
Why are there designed to 2 hole or 6 hole?
Are there have special features?
Thanks!Ashamed0002]]> <![CDATA[Looking for free standard codes?]]> http://www.gordonengland.co.uk/sef/Thread-Looking-for-free-standard-codes Wed, 04 Jan 2012 01:08:51 +0000 http://www.gordonengland.co.uk/sef/Thread-Looking-for-free-standard-codes http://manganow.org. We provide the following standard codes: ASTM, ASME, ABNT, ISO, DIN, VDI, ANSI, AISC, API, AWS, IEEE and BSI.]]> http://manganow.org. We provide the following standard codes: ASTM, ASME, ABNT, ISO, DIN, VDI, ANSI, AISC, API, AWS, IEEE and BSI.]]>