coating question

[zhuminkun]

can any epxerts can expain me what below mean:

requirement:

Roughness Rz 150-250 μm
Hardness min. 54 HRC
thinkness 0,5-0,6 mm

bond layer NiAl / NiCr / NiTi 0,1-0,2 mm
bottom layer 13% Cr-Stahl 0,2 mm
surface 29% Cr-Stahl 0,2 mm

13% Chrome and some Molybdenum for hardness

bond layer is the 1st layer? bottom is actual intermediate layer?
what means 13% chrome and some Mo for hardness, which layer to appy this? surface?

[Stephen Booth]

zhuminkun:

Here are my thoughts......

Roughness Rz 150-250 μm
Hardness min. 54 HRC
thinkness 0,5-0,6 mm

those points are standard engineering terms and you can find on line....


bond layer NiAl / NiCr / NiTi 0,1-0,2 mm
bottom layer 13% Cr-Stahl 0,2 mm
surface 29% Cr-Stahl 0,2 mm

13% Chrome and some Molybdenum for hardness

bond layer is the 1st layer? bottom is actual intermediate layer?
Bond layer is the first layer in contact with the substrate, the NiAl materials have better bonding than the top layer.....



what means 13% chrome and some Mo for hardness, which layer to appy this? surface?

13% Chrome is a very common wire and powder sprayed, if Wire would be Metcoloy 2 this is the top layer

for details you would need to know the process of thermal spray, the part etc.

[velocity]

can any epxerts can expain me what below mean:

requirement:

Roughness Rz 150-250 μm
Hardness min. 54 HRC
thinkness 0,5-0,6 mm

bond layer NiAl / NiCr / NiTi 0,1-0,2 mm
bottom layer 13% Cr-Stahl 0,2 mm
surface 29% Cr-Stahl 0,2 mm

13% Chrome and some Molybdenum for hardness

bond layer is the 1st layer? bottom is actual intermediate layer?
what means 13% chrome and some Mo for hardness, which layer to appy this? surface?

13Cr is probably 420SS, brand name metcoloy 2. Good for build up, low shrinkage. Bond is first ofc but which application will you provide? Hvof, arc spray, flame spray ?