Hi all there,
We are a small aluminum extrusion company in Argentina. Unlike other extruders in our country, we have our own furnace to gas-nitride our dies. Does anybody in the forum know how to test nitrided case integrity? I know that solutions containing Cu++ can be used for this purpose. Does anyone know how they are formulated?
Also; is the test still useful for treatments that produce low thickness white layers (e.g. plasma and low pressure gas nitriding)?
Thank you very much for replying,

Sandero

Dear all,
How to control the blasting nozzle.
How much wear rate of the blastign nozzles, I must replace new.
Thanks
regards,

William

I am new to this site and i'm not an engineer of any type. I'm looking for help and advice, i am wanting a mould made to make fishing lures and dont know which engineering firms to ask. The mould must withstand the heat of molten lead,zinc,tin and hopefully should be able to cast 8-10 casts at a time.
IF ANYONE KNOWS WHICH TYPE OF ENGINEERING FIRMS TO APROACH OR KNOW OF ANYWHERE IN THE NORTH EAST OR EVEN THEM SELVES THAT COULD MAKE THE MOULD PLEASE REPLY OR E-MAIL ME O_BRIEN@BLUEYONDER.CO.UK THANKS STEVE

Hi, I have joined this wonderful forum just today. I would like to know if any one can offer any practical training on 'FUSION' of plasma coated powders. In fact, I have to fuse - in a bogie furnace, preferably - a roll on 400 mm dia & 6000 mm L. The coating thk is 1.5 mm. Can any body help? suggest? Done any where in the world? Procedure? I have done similar job but with a small length - 2100 mm, successfully. But, for such a long job - well, how to avoid distortion at 1100 deg C is the major problem!

Thanks in advance.

Regards,

Sumant

Good evening, everybody.
Can somebody advise me?
My question is about thermal spray coating metallographic specimen preparation.
Same samples were prepared by different manner, (it was Ni-Al Metco 450 NS, plasma coating).
One- by Bakelite hot molding, another by Epoxy (Epofix- of Struers) cold casting.
After the same grinding and polishing steps Bakelite molded sample demonstrated
microstructure without any defect, but epoxy molded sample revealed badly integrated structure with local interface separation and not sufficient bonding between particles.
Reason, that I see- is:
1- stresses, generating in the coating, caused by epoxy solidification- very big contact surface epoxy- coating.
From the other side, may be it is a real structure, and the nice and dense structure of Bakelite molded sample is the result of pressure, applied at the time of molding by press (Simplimet 2000). It is about 20 Mpa.
Thank you for any help.

volf

Hello there,
I was wondering if anyone here can help me (and yes I have been to the doctor, but thats not the problem I need help with

I work for a company over here in Austria which sells all sorts of materials for industrial applications. One of our products is a surface hardening powder for steel. I have a customer who renovates and rebuilds diesel engines and he buys this powder from us. The problem is in the fact that it is a powder. He has to stand the crankshafts upright before he can heat them up (to 850?) and has no way of making sure that the powder has not run off. He tells me that he saw a hardening paste which you can spread on like butter but that was yonks ago and he doesnt remember where he saw it. Do any of you have an idea who makes such a paste or where I could get it from?

Hope to hear from you soon,
best regards
Alan

We are a large nickel carbonyl plant whichs is able to coat a number substrates with nickel at different mesh sizes and coating thickness. We are looking for companies which need nickel coated powders. We are able to make the powders to your spec.

Hello
Can someone to explain me what is the harm to health due to NOx high concentration (I found about 60-80ppm of NOx in the air, CO was 0 ppm) in the room where we perform fusing process? The question is very serious for me. What are possibles effects?


Best regards
Arturas

Hi guys

I am new to the forum. I need help in the reducing the noise emitted from the grit blasting machine.

Currently we have a few units of grit blasting enclosures, manual operated, with pneumatic doors that slides up & the usual dust collectors etc. Some are from Vapor Blast. The doors are pneumatically operated & interlocked to prevent ergo issues to the techs using it.

Right now, blasting of some component parts yield a noise level of between 88 to 92 dBA. Techs need to put on ear plugs or muffers. We intend to reduce it to below 84 dBA so that hearing protection is not needed & to reduce overall noise generation in the shop floor.

We had identified that the weakest link is at the door & noise is 'leaking' from there & when measured at 1m distance, it can be as high as 94dBA at certain times. Since its sliding up, there's no insulation materials on the door itself as it will interfere with the mechanism & using an acoustic curtain is not recommended as we have handling issues.

Do u know of any other methods or refer me to links that talks on this subject? I knw that its more of a EHS issue so I do not knw if this is the right forum for me to post this.

Thanks in advance for yr help

TheZard

I have several solid copper parts that i need to increase the surface hardness on ( to extend service live in a moderatly abrasive atmosphere) while not sacrificing the electrical conductivity. Any suggestions?