Cobalt-base sintered alloy. [varying percentages of Cr, W, Ni, Mo, Fe, Ti, Si, Mn, C, B]

Patent · Tue May 16 04:00:00 EDT 1978

OSTI ID:6345544

Saito, Y; Mayama, O

A cobalt-base sintered alloy can be manufactured from a reduced powder by the conventional powder metallurgy process with the reduced powder as a material powder. The reduced powder is prepared by simultaneously reducing a mixed powder consisting of powders of oxides of elements constituting the sintered alloy with a carbon powder added and mixed was, the reduced powder consists of powders of the constituent elements and powders of carbides thereof, and consists essentially of, in weight percentage, chromium from 15.0 to 35.0%, tungsten from 3.0 to 19.0%, nickel from 0.2 to 12.0%, molybdenum from 0.1 to 15.0%, iron from 0.05. to 5.00 %, titanium from 0.05 to 2.00%, silicon from 0.05 to 1.50%, manganese from 0.05 to 1.00%, carbon from 0.2 to 3.5%, and the balance cobalt and incidental impurities.The above-mentioned cobalt-base sintered alloy, also contains, in weight percentage, from 0.05 to 1.00% boron. These cobalt-base sintered alloys provide a relatively wide range of sintering temperatures in their manufacture, and furthermore have a high sintered density of at least 95% of the theoretical value, and are excellent in machinability, heat resistance, wear resistance, and corrosion resistance. 3 figures, 1 table.

• Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
• Patent Number(s): US 4089682
• OSTI ID: 6345544
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
BORON ADDITIONS
BORON ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CHROMIUM ALLOYS
COBALT ALLOYS
COBALT BASE ALLOYS
FABRICATION
IRON ADDITIONS
IRON ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MANUFACTURING
METALLURGY
MOLYBDENUM ADDITIONS
MOLYBDENUM ALLOYS
NICKEL ADDITIONS
NICKEL ALLOYS
POWDER METALLURGY
SILICON ADDITIONS
SILICON ALLOYS
SINTERED MATERIALS
SINTERING
TITANIUM ADDITIONS
TITANIUM ALLOYS
TUNGSTEN ALLOYS