Surface Engineering Forum - All Forums

improving 72FNS microstructure

Tue, 30 Jun 2009 04:30:49 +0100

My first attempt at 72FNS came back with the following microstructure results:
Delamination - fail, integrity - fail, porosity - V4 as apposed to
Sprayed with 4" distance, Arg/Hydrogen, 15 sec cooling time between passes, GE nozzle, 73V 500Amps, 75nlpm primary gas, 3.8nlpm 2ndry gas, 7 nlpm carrier gas, 8.2 lbs/hr feed rate.

The machine is a metallisation system using a metco 9mb gun.

Any suggestions as to how I can improve on the above results and also, what are your thoughts on gas choice; is argon/ helium a better option??

Thanks
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Online Guide for Mechanical Industry

Mon, 29 Jun 2009 06:05:22 +0100

Hello friends,
Today I want to tell you something interesting about online Mechanical Engineering.
Mechanicalebook.com is an online exclusive reference and handbook for Mechanical Engineering Industry. This website has technical description in details, question answers on several topics in Mechanical Engineering, from Screw to Jet Engine. Additionally you will also find Charts which you can take print out, Formula’s and Calculator Tools Online, Technical Definitions, Videos on advance topics and to test your knowledge we have engineering Quiz and much more.

substrate deformation of WC coating in gate valve

Sun, 28 Jun 2009 12:19:50 +0100

Hi
Our customer that produce gate valve say that after several working opening/closing of gate valves we have some deformation of substrate of WC coating on the gate.this deformation is effect of seat on the coating substrate of gates(to be crushed). base material of gates in this kind is 4130 AISI with 25 HRC .is this possible that we have some heat treatment on gates before coating for solve this problem?(such as nitriding or ...)

Jet Kote O2 and H2 supply pressure requirements?

Wed, 24 Jun 2009 18:06:35 +0100

What gas supply flows and pressure requirements are you using for the Jet Kote.

Someone was telling me O2 was 0-25 bar!!! and 3200scfh!!! and a 3/4" pipe.

They also had the H2 supply of 0-18 bar and 3200scfh (1500nlpm).

That sounds high to me. Most I have ever seen them run is 2100scfh.

anyway... can someone with JK experience enlighten me

Thanks

stainless and cor-ten steels

Mon, 22 Jun 2009 14:44:28 +0100

Hi,

I'm an architect with a query - I hope this is ok. Are there any bi-metallic issues with using stainless steel and cor-ten steel together? As they are both steel I would have thought not but I thought I'd check to be sure. The situation is stainless steel lettering mounted onto cor-ten as external signage.

Thanks.

Civil Engineering

Mon, 22 Jun 2009 08:11:57 +0100

Civil engineering deals with a variety of construction and maintenance tasks, like building and maintaining roads, bridges, tunnels, buildings, airports, dams, water works, sewage systems and ports. A civil engineer not only requires a high standard of engineering knowledge, but also supervisory and administrative skills. The work involves planning, constructing and maintaining. Civil engineering is ideal for those who love to create and the job is monetarily rewarding and involves a lot of responsibility. An engineer is directly responsible for public safety and welfare. Safety should be the first priority of any engineer. If they are involved in constructing residences, they have to follow the safety precautions involved too. In the case of a highway, they are expected to follow traffic safety rules. Engineers have to look out for potential hazards, including environmental impacts and estimated life expectancy of the project. Natural disasters make it important for engineers to be extra cautious about environmental pressures. To begin a career in civil engineering, you need to complete a formal school education, including core courses in English, Algebra, Geometry, Advanced Math, Physics and a foundation in History and Social Studies. In college, a student needs to earn a Bachelor's degree. Pursuing a Master's Degree is necessary. According to a recent survey, more than 35% students who have acquired a Bachelor's degree go on to enroll for a Master's, even as they continue to work. Many students prefer to work and earn at the same time because that can earn them a tuition reimbursement. Acquiring a Master's degree or a PhD helps a student to specialize in the field. The road to complete a civil engineering course is endless and that is why many professionals choose to keep on learning the latest trends in the construction business via special programs developed by universities and professional societies like the American Society of Civil Engineers. The annual earning of a civil engineer is anywhere between $43,000 to $90,000, depending on specialization and experience.
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Various Metco Plasma Spares / Powder Spares (inc. 9mb Gun Body)

Sun, 21 Jun 2009 08:43:57 +0100

I have the following Sulzer Metco / Metco spare parts to offer as follows:

1 off 9mb gun body
12 sets of Sulzer Metco 300003 Nozzle / Electrode / O ring F4 6mm
5 off 300002 Nozzle F4 6mm
3 off 300001 Electrode F4
4 off 9mb 738 nozzle assembly 9mb Plasma
1 off 9mb 985
1 off 9mb 724c
1 off 9mp V2.2 electronic board (serial number CMXT-14166(A90428))
1 off 9mp 138
3 off 4mp 99
2 off 4mp 193
2 off 4mp 213
2 off 4mp 209
1 off 9mp 36
4 off 9mp 16
1 Nozzle assembly 6P7AF
1 off 6P-190
1 off 6P-205
1 off 6P-675
1 off 6P-27
2 off 6P-190
1 off 5P-197
1 off 5P-75
1 off 5P-24
4 off 5P-32
1 off 5P-189
2 off 5P-166
1 off 5P-122
1 off 5P-575
1 off 5P-66
1 off 2GF47
5 off 3M7-G

Plasma Technic nos.
1 off 3001004
3 off 200809

Parts unlabelled but believed to be :
6P/5P 605 nozzle assembly
1 off powder or gun vibrator
and possibly 4MP powder feed tube

All these parts are genuine, new and boxed Metco spares. If you would like any further information or photos of the above then please let me know.

If you are interested in purchasing any of the above, then please email me with your best offer.

Many thanks.
Jane
(janewoodley2000@yahoo.co.uk)

Long Course-Thermal Spray

Sat, 20 Jun 2009 15:47:21 +0100

Dear All,

Is there any information about long course of thermal spray? Where is it? and what time is it held?

Ahmad

Surface treatement for high-friction interface with human hair

Wed, 17 Jun 2009 20:37:01 +0100

Hi all,

I am new to both this forum and the entire subject of surface engineering, so I apologize if this post covers something too simple or outright incorrect.

I am a college student and currently doing contracting work through my school. Our project requires us to create attachment methods for high end hair extensions. In order to create a high-friction interface, we planned to cover the inside of our attachment with asperities similar geometric properties to the surface of the hair itself. Thus, I need a surface with asperities on the scale of .5 to 5 microns.

This surface would need to be located on the inside of a tube about .06" in diameter and .2" long. The tube will be made of plastic (either polyurethane, polypropylene, HDPE or LDPE), so an ideal surface treatment would work on plastic. If necessary, I could probably bond a thin surface-treated insert to the inside of the tube.

I initially thought that plasma spraying would be appropriate for the job, but the only company that I spoke to said that the size and material posed too many problems. I've been looking into micro-abrasive blasting, but I am concerned that the asperities will be too large. Does anyone know of a way to do this kind of thing or raise friction somehow else?

Thanks,

David

Ti-Al powder

Tue, 16 Jun 2009 08:53:05 +0100

Hi.

Can someone give me contacts to firms selling/distributing titanium aluminide powder? Or maybe someone can make an offer here? I would be interested in 0,5 kilogram of it.

Thx in advance for help.

Cheers.

machine of plasma coating

Thu, 11 Jun 2009 15:09:03 +0100

Hello ,Everybody
Is it possible to turing the plasma coating sprayed with powder metco68F-NS although grinding is preferred?
How to determine the machine mode of plasma coating?Hardness is foremost factor?
Is it must to check the surface roughness after machine the coating?
Thanks a lot!

Flame Spray Equipment

Wed, 10 Jun 2009 14:16:37 +0100

We are a distributer of Flame Spray equipment. Providing all the necessary equipment and accessories, such as Flame Spray systems, industrial spray guns, metal components and spare parts. Quality for us is one of the most important areas, and we strongly believe that our consistent relationship with our customers depends on our capability to ensure delivery of good quality merchandise.

We offer spare parts and components at competitive prices for
10E, 11E, 12E, or 14E,
and complete systems to replace and or compliment your current ones.

FLAME SPRAY GUN MODEL IMC-88

Sprays pure or alloyed metals such as Zinc, Aluminum, Steel, Brass etc. in wire form by using Oxygen-Acetylene/LPG gases flame and atomized by Compressed Air.

Sprays fast and uses up to 1/8” wire, irrespective of type of wire, the wire pulling power and high speed is assured.

The gas head valve is designed for long service life and low maintenance.

A simple quick action lever operates the wire grip mechanism to start and stop the wire feed instantaneously.

JEFF_ICE@optonline.net

pencil hardness and tukon hardness test

Tue, 09 Jun 2009 15:25:46 +0100

Hi,

Newbie here. I have this long-bugging question of how to correlate the traditional pencil hardness test to tukon hardness test for painted surface.

For example, a HB hardness from pencil could meant a 6 KHN from tukon and so on.

Thank you,
Eric from Univ. of Michigan

Hot corrosion/erosion of metal

Tue, 09 Jun 2009 15:03:20 +0100

New to this forum. Would like to know thoughts on erosion of metal in air pollution control systems of a municipal sludge incinerator. Sludge burned is abnormal due to high phosphrous content. Reactor temperature is 1450 degrees F utilizing olivine sand as the fluid. High phosphorous content sludge agglomerates on sand and hardens.

Heat recovery units experience erosion/corrosion that lead to water tube leaks. Coated likely wear areas with a product that lasted 1 year. What are the best coating options?

Also looking at lime to soften the fly ash and bind SO2-SO3 specie.

Surface Engineering & Green Engineering

Tue, 09 Jun 2009 07:29:42 +0100

Hi,
Our (self & my Wife)paper on 'Surface Engineering & Global Warming' has been accepted for the symposium on ''Green Engineering and Environmental Stewardship' in the forthcoming MS&T conference in USA. The paper is based on materials from our new book on ''Global Warming-Origin,Significance, and Management'' to be published soon.The book is structured as a comprehensive reference book on the subject with 19 cn chapters ,starting from the Earth's atmosphere to Corporate Social Responsiblity
Surface Engineering plays a key role in minimizing global engineering.Do you know that 45% of energy is lost in the transmission to wheels of your car ? Quite a bit of this loss can be minimized by surface engineering of the components and lubrication(also considered as a part of surface engineering).Similar losses occur in most of the energy transmission systems.You can find lot of information on this subject in a NEDO, Japan publication/ EU research programmes.
Well, I shall be in USA for next one and half month in order to complete the process of publishing our new book.
ram chattopadhyay