Chromium plating
Additional recommendation is given for removing "overgrowth": The excess metal should be removed by working from the center of the shaft outwards this will prevent chipping of the deposit.Ĭhem Processing Inc. Normally cuts should be in the region of 0.0004" deep, in the special cases reducing this to 0.0002" deep for minimum cracking. Thus heavy cuts must be avoided, particularly on parts which are going to be highly stressed or are going to be in service under corrosive conditions.
#CHROMIUM PLATING CRACK#
It must be remembered that the heat created on grinding can cause the occluded hydrogen to expand violently, and thus crack the deposit severely.
184) recommends: When ground the metal has a bluish white spark and overgrowth soon cuts ridges in the wheel. Additional buildup in the form of nodules may also occur at edges when heavy deposits are being applied.įor reference, Heavy Deposition by J.D. Extra "grind stock" will be applied, typically around 0.002" unless otherwise specified. does not offer grinding services but this is often an operation performed to bring a hard chrome plated deposit to desired dimensions. RECOMMENDATIONS FOR FINISH GRINDING TO SIZE:Ĭhem Processing, Inc. Plastic Molds: hard chrome plating provides anti-stick/release properties for plastic molds across all industries.Salvage: hard chrome plating can be used to restore worn parts to their original dimensions or bring mis-machined parts into tolerance.Gears: hard chrome plating prevents galling and extends life in low-friction applications.Machine Tools: drills, taps, dies, extrusion screws and rolls are hard chrome plated to extend life and improve performance.Actuator components are hard chrome plated to reduce wear and extend service life. Aluminum piston heads are hard chrome plated to offer optimal performance with minimal weight. Aerospace: landing gear components are hard chrome plated in both OEM and MRO applications.Firearms: interiors of gun barrels are hard chrome plated.Automotive: pistons, shock absorbers and other parts that see high cycles over long periods of time are hard chrome plated for durability and lubricity.
Very Low Coefficient of Friction: Hard chrome plating offers extended wear life and exhibits excellent release characteristics in mold applications.A conventional bath will yield a Vickers diamond pyramid hardness of 900-1200. Hardness: Plated chromium is extremely hard.PS 101 (UTC Aerospace Systems/Hamilton Sundstrand).PN 13.06 (UTC Aerospace Systems/Hamilton Sundstrand).HS 246 (UTC Aerospace Systems/Hamilton Sundstrand).