Cold Fussion wrote: ↑
Sun Jun 21, 2020 5:37 pm
Do these coatings change the material hardness significantly? I would have thought the hardness would be more a function of the base material since the nano coatings are so thin.
On high wear, but low load cases, like a cylinder wall, using a hard coating on relatively soft aluminium pistons or bores is fine, but when you have strong eccentric moments, like a camshaft or a crankshaft, the base material has to have a higher base surface hardness to support the surface treatment. If not it'll simply flake off, or be pushed into the surface.