High-intensity rotary peening particle support and method of making same
AssigneeMinnesota Mining and Manufacturing Company
InventorsMichael W. Lovejoy, Jennifer L. Trice
Life of this patent
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Abstract
An improved high-intensity rotary peening particle support of the type having a plurality of peening particles metallurgically secured to an exposed face thereof is presented, the support having a base composition consisting essentially of from about 0.08 to about 0.34 weight percent carbon, the balance iron, and a Ni-enriched layer which provides a hard, wear resistant surface. A method of producing such a support is also described, the method including cold forming a peening particle support base composition as described, stress relieving, brazing peening particles to an exposed face of the support, austenitizing, quenching, and tempering the support to form a support having a Ni-enriched layer which is harder than the base composition.
Claims24
An improved high-intensity rotary peening particle support of the type having a plurality of peening particles metallurgically secured to an exposed surface thereof, wherein the improvement comprises the support having a base composition consisting essentially of from about 0.08 to about 0.34 weight percent C, the balance Fe, and a Ni-enriched layer extending below said exposed surface, said Ni-enriched layer having weight percent Ni greater than the base composition.
An improved method of making a rotary peening particle support which reduces peening particle support failure, the support having a plurality of peening particles metallurgically secured to an exposed face thereof, the method including the consecutive steps of cold forming a base metal stock preform to form the support, heating the cold formed support for a time and at a temperature sufficient to stress relieve the support, metallurgically joining a plurality of peening particles to the exposed face of the support, heating the support for a time and at a temperature sufficient to austenitize the support, quenching the support, and heating the support for a time and at a temperature sufficient to temper the support, wherein the improvement comprises the base metal stock consisting essentially of from about 0.08 to about 0.34 weight percent C, the balance Fe.
A rotary peening particle support having a plurality of peening particles brazed to an exposed surface thereof, said support comprising a base composition and a Ni-enriched layer, said base composition consisting essentially of from 0.18 to 0.23 weight percent C, from 0.0005 to 0.003 weight percent B, the balance Fe, said Ni-enriched layer positioned substantially near the peening particles.
A method of making a rotary peening particle support of the rivet-type having peening particles secured to an exposed surface thereof, said method comprising
- (a) cold forming a metal stock into a rivet, said rivet having a plurality of depressions in said exposed surface, said metal stock consisting essentially of from about 0.08 weight percent to about 0.34 weight percent C, the balance Fe;
- (b) stress relieving the rivet of step (a);
- (c) brazing said peening particles to said exposed surface;
- (d) austenitizing and quenching the rivet of step (c);
- and
- (e) tempering the rivet of step (d) at the desired tempering temperature and for a time sufficient to produce the desired hardness for said rivet.
Dependencies are inferred from the claim text.