Scm Corporation

Charles I Whitman

Erhard Klar

David H Ro

Anil V Nadkarni

Warren J Haws

A copper-rich metal shape is produced by forming a coherent forerunner shape consisting essentially of cupreous powder, said powder containing a proportion of copper oxide sufficient for facilitating the obtaining of a high sinter density in sintered porous mass, and in a reducing atmosphere at temperature that will sinter copper present, converting said forerunner shape into a porous sintered mass virtually devoid of copper oxide. Said porous mass can be worked so virtually full density if desired.

Process for making copper-rich metal shapes by powder metallurgy

Substantially completely deoxidized dispersion strengthened copper leads in incandescent electric lamps.

Incandescent lamp leads of dispersion strengthened copper wires

A process is disclosed for improving the corrosion resistance of stainless steel powders produced by atomization in an oxidizing atmosphere whereby silicon present in the powder tends to form silicon oxides on the powder surface. The process comprises adding an effective proportion of a modifier metal selected from the group consisting of antimony, arsenic, and bismuth to the melt prior to atomization. The modifier metal addition is effective for decreasing the surface silicon oxides and thereby improves the corrosion resistance.

Corrosion-resistant powder-metallurgy stainless steel powders and

The corrosion resistance of atomized tin-and-carbon containing stainless steel powders and compacts thereof is enhanced by incorporating a modifier metal into the melt prior to atomization. Effective modifier metals disclosed are niobium, titanium, tantalum, molybdenum, and the like.

Corrosion-resistant stainless steel powder and compacts made therefrom

This invention relates to dispersion strengthening of metals. A coherent mass comprising an intimate blend of alloy powder and oxidant is formed prior to dispersion strengthening. Said coherent mass is easily formed because the alloy powder is not yet strengthened, and undergoes internal oxidation rapidly because of the intimate blend of alloy powder and oxidant.

Metal mass adapted for internal oxidation to generate dispersion

Disclosed is a process for improving the corrosion resistance of a stainless steel powder or compact thereof wherein said powder is produced by atomizing a melt of metals in an oxidizing environment whereby the resulting stainless steel powder is surface-enriched in silicon oxides. The process comprises adding an effective proportion of modifier metal to said melt prior to said atomization, said modifier metal selected from the group consisting of tin, aluminum, lead, zinc, magnesium, rare earth metals and like metals capable of enrichment about the surface of said resulting atomized stainless steel powder and effective under reductive sintering conditions in the depletion of said silicon oxides about said surface; and sintering said resulting atomized powder or a compact thereof under reducing conditions, said sintered powder or compact thereof being depleted in said silicon oxides and the corrosion resistance of said powder or compact thereof being improved thereby.

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Bay Village, OH, United States of America

Charles I Whitman