Master alloy for powders
AssigneeFord Motor Company
InventorStanislaw Mocarski
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Abstract
A master alloy powder is formulated for admixture to an iron based powder to provide liquid phase sintering and production of a substantially homogeneous product having the characteristics of a wrought alloy product. The master alloy powder contains at least two elements selected from the group consisting of manganese, nickel molybdenum, chromium, copper, carbon and iron. The master powder may contain additions of silicon up to 5% and rare earth metals up to 2%, either of which assist to speed up diffusion and create a more favorable liquidus-solidus relationship within the master alloy powder.
Claims9
For use in a method of making sintered alloy steel parts by the compaction and sintering of admixed powders to obtain alloying, a low melting master powder admixture of alloying ingredients to be added to an iron based powder except for the addition of a desired quantity of graphite, the master powder admixture consisting of at least two but up to all of the powder elements selected from the group consisting of manganese, nickel, molybdenum, chromium, copper and iron, with molybdenum being in the range of 5-15% by weight of the master powder admixture when selected along with the absence of copper, and iron being less than 20% by weight of said master powder admixture when selected, said selected elements being proportioned within said master powder admixture to possess a liquidus temperature residing between 1800.degree.-2250.degree. F and a melting range for all ingredients of no greater than 350.degree. F.
Dependencies are inferred from the claim text.