Hard Chrome Alternative
Hard Chrome Alternative
(OP)
Hi All,
I have been looking into how we can drop the costs on a component we need at work. Basically its a mild steel tube with hard chrome plating on the OD as it is a sealed and bearing surface.
I got a little excited about the potential of Nitride (ONC black) but have since found out it is achieved using high temperatures and will most likely warp our tubes. even the "low temperature" plasma nitride is still approx 400 deg C.
I have had a small look into High Velocity Oxy-Fuel (HVOF) but i can only find information on suppliers pages therefore i am skeptical it isn't biased.
Question:
Does anyone know of any good quality alternatives to hard chrome plating? especially if its cheaper?
(wall thickness is 3mm)
much appreciated.
Josh
I have been looking into how we can drop the costs on a component we need at work. Basically its a mild steel tube with hard chrome plating on the OD as it is a sealed and bearing surface.
I got a little excited about the potential of Nitride (ONC black) but have since found out it is achieved using high temperatures and will most likely warp our tubes. even the "low temperature" plasma nitride is still approx 400 deg C.
I have had a small look into High Velocity Oxy-Fuel (HVOF) but i can only find information on suppliers pages therefore i am skeptical it isn't biased.
Question:
Does anyone know of any good quality alternatives to hard chrome plating? especially if its cheaper?
(wall thickness is 3mm)
much appreciated.
Josh





RE: Hard Chrome Alternative
RE: Hard Chrome Alternative
RE: Hard Chrome Alternative
RE: Hard Chrome Alternative
RE: Hard Chrome Alternative
Based on your description, the Melonite QPQ process (or something similar) should cost less overall than using hard chrome. The only advantage that hard chrome has versus LSB nitrocarburize is that the hard chromed part can be reworked if the plated surface is damaged.
RE: Hard Chrome Alternative
I will look into it. Thank you very much. :D
RE: Hard Chrome Alternative
What is Your 'mild steel' strength requirement? 95-KSI? 125-KSI? etc?
What is Your current ASME B46.1 surface roughness requirement [before and after plating]? 8-microinches RA, 16-mi RA, etc?
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]
RE: Hard Chrome Alternative
So, the supplier of a current process is claiming that an alternative process (that they likely can't do) won't work? Ever hear the line "trust but verify"?