Hi ir_minja
Quote:Hi guys, i just want to about the equipment that can detect any chemical composition of material, especially when any surface engineering process applied on the material surface. Can you suggest the most suitable chemical composition equipment?perhaps, portable equipment. which web site?
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I suspect you are thinking of this type of material identification equipment. I'm afraid I have little experience with them and have not really come across the use of them generally in thermal spray coating shops.
Quote:when HVOF is done, how we can measure the hardness of the surface layer?
The standard type hardness (Vickers and superficial Rockwell) testing methods used for thermal spray coatings are normally considered as destructive tests. So these methods are usually applied to test pieces, ideally sprayed as part of the work to duplicate conditions. There are small portable type hardness testers, which may be considered as non-destructive and may be suitable on finished machine coatings (assuming they leave little or no indentation damage), but these would need very careful calibration to the specific coating you are testing. I certainly would not trust the direct readouts in Vickers or Rockwell or whatever without some cross-reference to actual standard tests for that particular hardness scale.