Alloy compositions
AssigneeHoeganaes Corporation
InventorsChristopher Schade, Kerri Horvay, Jon Baumgartner
Life of this patent
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Abstract
The present disclosure provides compositions comprising iron, about 0.01 to about 0.4% w/w of manganese; about 1.3 to about 1.9% w/w of chromium; about 0.1% w/w or less of nickel; about 1.2 to about 1.7% w/w of molybdenum; about 0.01 to about 0.4% w/w of niobium; about 0.01 to about 0.4% w/w of vanadium; about 1.5 to about 2% w/w of silicon; and about 0.01 to about 0.20% w/w of carbon. The present disclosure also provides methods of preparing a metal powder, comprising atomizing a composition described herein and methods of preparing a metal object, comprising subjecting metal powder described herein to metal binder jetting.
Claims26
A method of preparing a dual-phase microstructure sintered metal object, comprising:
- (i) atomizing an iron-based composition to form a metal powder, wherein the iron-based composition comprises:
- 0.01 to 0.4% w/w of manganese;
- 1.3 to 1.9% w/w of chromium;
- 0.1% w/w or less of nickel;
- 1, 2 to 1.7% w/w of molybdenum;
- 0.01 to 0.4% w/w of niobium;
- 0.01 to 0.4% w/w of vanadium;
- 1.5 to 2% w/w of silicon;
- and
- 0.01 to 0.16% w/w of carbon;
- wherein the balance of the iron-based composition comprises iron and the iron comprises no more than 1.0% w/w, based on the total weight of the iron-based composition, of normal impurities;
- (ii) depositing two or more layers of the metal powder to form a component;
- and
- (iii) sintering the component at a temperature for the sintering is 700 to 1500° C. to provide a two phase microstructure comprising austenite and ferrite and having a density of at least 7 g/cm3;
- and
- (iv) cooling the component of (iii) to provide the dual-phase microstructure sintered metal object comprising (a) ferrite and (b) at least one of martensite or bainite.
Dependencies are inferred from the claim text.