Gordon England Surface Engineering Forum



Spray parameters for HVOF of Diamalloy 4008 NS

Posted by Juergen (217.6.15.137) on 14:37:15 04/05/05

Hello everybody, could someone give me support: We need to apply a repair coating due to mismachining of a large component, diameter 750 mm, with a thickness of up to 2 mm. The coating will be turned afterwards. We would do it by HVOF-spraying it with a GTV - K2 equipment. This is similar to JP 5000. We want to process Sulzer Metco Diamalloy 4008 NS powder (NiAl 95-5 fully alloyed , approx -53 +10 µm.) My questions: . Spray parameters: kerosene (l/h) . oxygene m³/min, - spray distance - powder mass flow - carrier gas flow (argon) ------- Process parameters: - max. substrate or coating temperature - layer thickness per pass - surface velocity - surface cooling during spraying - yes or no -------- Pretreatment parameters - blasting with white alumina 0.8 - 1.2 mm(noble corundum) - surface roughness Ra-value, Rz-value ------- Any help will be aprreciated With kind regards from Germany Juergen


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