PROCEDURE FOR HARDENING METAL COMPONENT AND STRUCTURE ELEMENT WITH METAL COMPONENT MADE BY THIS PROCEDURE Russian patent published in 2010 - IPC B24C1/10 B24C11/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to shot-blasting hardening of metal surface made out of light alloy. At the first stage surface of metal is shot-blasted with the first particles containing iron as main component with average size of particles not less, than 0.1 mm and not more, than 5 mm. Upon completion of the first stage and at the second stage surface of metal is shot-blasted with the second particles, in essence, not containing iron, with average size of particles not more, than 200 mcm. At the first stage pressure of sputtering is not less, than 0.1 MPa and not more, than 1 MPa, preferably, not less, than 0.2 MPa and not more, than 0.5 MPa. At the second stage pressure of sputtering is not less, than 0.1 MPa and not more, than 1 MPa, preferably, not less, than 0.3 MPa and not more, than 0.6 MPa.

EFFECT: efficient removal of iron fractions adhered to metal surface, and improved fatigue properties of produced metal component, practically without change of size and without metal surface profile roughening.

2 cl, 10 dwg, 1 tbl, 4 ex