B - Operations – Transporting – 24 – C
Patent
B - Operations, Transporting
24
C
B24C 1/10 (2006.01) B24C 11/00 (2006.01)
Patent
CA 2175185
A method for enhancing the rust resistance and the surface finish of a non-ferrous workpiece, such as aluminum, is disclosed. The method comprises the step of impinging the workpiece surface for a predetermined amount of time with a high velocity stream of ferrous particles. The ferrous particles preferably have a hardness less than approximately 40 Rockwell C, preferably 20-40 Rockwell C, and still more preferably 30-40 Rockwell C. The particles are not tempered before impinging. This substantially eliminates stress cracks in the ferrous particles, thus substantially preventing any particulate ferrous matter from becoming imbedded in the impinged workpiece surface, which imbedded particulate matter may be prone to rust.
Procédé destiné à améliorer la résistance à la rouille et le finissage de surface d'une pièce non ferreuse, telle qu'une pièce en aluminium, qui consiste à heurter la surface de la pièce pendant un certain temps avec un flux à grande vitesse de particules ferreuses. Lesdites particules ferreuses ont de préférence une dureté inférieure à environ 40 Rockwell C, de préférence 20 à 40 Rockwell C, et plus préférablement encore de 30 à 40 Rockwell C. Lesdites particules ne sont soumises à aucun revenu avant d'être envoyées sur la surface et cela élimine pratiquement les fêlures de contrainte dans lesdites particules ferreuses, ce qui empêche pratiquement tout matériau ferreux issu des particules de s'incruster dans la surface de la pièce traitée, le matériau particulaire incrusté étant susceptible de rouiller.
Stevers Gary J.
Wood W. Gary
Sim & Mcburney
Ultra Blast Partners
LandOfFree
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