US2024133004A1PendingUtilityA1

Iron alloys

Assignee: LAWS KEVINPriority: Feb 24, 2020Filed: Feb 24, 2021Published: Apr 25, 2024

Est. expiryFeb 24, 2040(~13.6 yrs left)· nominal 20-yr term from priority

Inventors:Kevin Laws Patrick Conway Lori Bassman Jackson Baker Catherine Holland Frank Douglas Anderson Raigosa Stephanie Blankley Natalie Rachel Krieger

C21D 8/02C22C 30/00C22C 38/38C21D 1/18C21D 1/74C21D 8/0205C21D 8/0226C21D 8/0236C21D 8/0263C21D 9/52C22C 1/02C22C 33/04C22C 38/06C22C 38/26C22C 38/28C22F 1/002C22F 1/16C22C 38/04C22C 38/18

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References

Claims

Abstract

The present disclosure relates generally to alloys, and in particular, to iron alloys.

Claims

exact text as granted — not AI-modified

1 . An alloy comprising or consisting of:
 35 to 70 at. % Fe;   10 to 50 at. % Cr;   1 to 25 at. % Mn; and   1 to 10 at. % Al.   
     
     
         2 . The alloy of  claim 1  comprising or consisting of:
 37.5 to 67.5 at. % Fe; 
 12.5 to 47.5 at. % Cr; 
 2.5 to 25 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         3 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 25 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         4 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 25 at. % Mn; and 
 4 to 6 at. % Al. 
 
     
     
         5 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         6 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; and 
 4 to 6 at. % Al. 
 
     
     
         7 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 25 at. % Mn; and 
 5 at. % Al. 
 
     
     
         8 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; and 
 5 at. % Al. 
 
     
     
         9 . The alloy of  claim 1  comprising or consisting of:
 45 to 65 at. % Fe; 
 25 to 45 at. % Cr; 
 2.5 to 7.5 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         10 . The alloy of  claim 9  comprising or consisting of:
 45 to 60 at. % Fe; 
 25 to 45 at. % Cr, 
 2.5 to 7.5 at. % Mn; and 
 5 at. % Al. 
 
     
     
         11 . The alloy of  claim 9  or  claim 10  comprising or consisting of:
 45 to 60 at. % Fe; 
 25 to 45 at. % Cr; 
 5 at. % Mn; and 
 5 at. % Al. 
 
     
     
         12 . The alloy of  claim 1  comprising or consisting of:
 45 to 65 at. % Fe; 
 20 to 40 at. % Cr; 
 7.5 to 12.5 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         13 . The alloy of  claim 12  comprising or consisting of:
 45 to 65 at. % Fe; 
 20 to 40 at. % Cr; 
 7.5 to 12.5 at. % Mn; and 
 5 at. % Al. 
 
     
     
         14 . The alloy of  claim 12  or  claim 13  comprising or consisting of:
 45 to 65 at. % Fe; 
 20 to 40 at. % Cr; 
 10 at. % Mn; and 
 5 at. % Al. 
 
     
     
         15 . The alloy of  claim 1  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 40 at. % Cr; 
 12.5 to 17.5 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         16 . The alloy of  claim 15  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 40 at. % Cr; 
 12.5 to 17.5 at. % Mn; and 
 5 at. % Al. 
 
     
     
         17 . The alloy of  claim 15  or  claim 16  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 40 at. % Cr; 
 15 at. % Mn; and 
 5 at. % Al. 
 
     
     
         18 . The alloy of  claim 1  comprising or consisting of:
 40 to 60 at. % Fe; 
 15 to 35 at. % Cr; 
 17.5 to 22.5 at. % Mn; and 
 2.5 to 7.5 at. % Al. 
 
     
     
         19 . The alloy of  claim 18  comprising or consisting of:
 40 to 60 at. % Fe; 
 15 to 35 at. % Cr; 
 17.5 to 22.5 at. % Mn; and 
 5 at. % Al. 
 
     
     
         20 . The alloy of  claim 18  or  claim 19  comprising or consisting of:
 40 to 60 at. % Fe; 
 15 to 35 at. % Cr; 
 20 at. % Mn; and 
 5 at. % Al. 
 
     
     
         21 . The alloy of any one of the preceding claims wherein the alloy consists of 90 to 97.5 at. % [Fe+Cr+Mn] and a balance of Al. 
     
     
         22 . The alloy of any one of the preceding claims wherein the alloy consists of 90 to 95 at. % [Fe+Cr+Mn] and a balance of Al. 
     
     
         23 . The alloy of any one of the preceding claims wherein the alloy consists of 95 at. % [Fe+Cr+Mn] and 5 at. % Al. 
     
     
         24 . The alloy of any one of the preceding claims wherein the alloy consists of:
 75 to 90 at. % [Fe+Cr];   5 to 20 at. % Mn; and   a balance of Al.   
     
     
         25 . The alloy of any one of the preceding claims wherein the alloy consists of:
 75 to 90 at. % [Fe+Cr];   5 to 20 at. % Mn; and   5 at. % Al.   
     
     
         26 . The alloy of any one of the preceding claims wherein the alloy consists of:
 10 to 30 at. % [Mn+Al];   15 to 45 at. % Cr; and   a balance of Fe.   
     
     
         27 . The alloy of any one of the preceding claims wherein the alloy consists of:
 10 to 25 at. % [Mn+Al];   15 to 45 at. % Cr; and   a balance of Fe.   
     
     
         28 . An alloy comprising or consisting of:
 35 to 70 at. % Fe;   10 to 50 at. % Cr,   1 to 25 at. % Mn;   1 to 10 at. % Al; and   0 to 3 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo].   
     
     
         29 . The alloy of  claim 28  comprising or consisting of:
 35 to 70 at. % Fe; 
 10 to 50 at. % Cr; 
 1 to 25 at. % Mn; 
 1 to 10 at. % Al; and 
 up to 3 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo]. 
 
     
     
         30 . The alloy of  claim 28  comprising or consisting of:
 37.5 to 67.5 at. % Fe; 
 12.5 to 47.5 at. % Cr; 
 2.5 to 25 at. % Mn; 
 2.5 to 7.5 at. % Al; and 
 up to 2 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo]. 
 
     
     
         31 . The alloy of  claim 28  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; 
 2.5 to 7.5 at. % Al; and 
 up to 2 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo]. 
 
     
     
         32 . The alloy of  claim 28  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; 
 5 at. % Al; and 
 up to 2 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo]. 
 
     
     
         33 . The alloy of  claim 28  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; 
 2.5 to 7.5 at. % Al; and 
 up to 1 at. % [Ti+Nb+V+W+Zr+Hf+B+Ta+Mo]. 
 
     
     
         34 . The alloy of  claim 28  comprising or consisting of:
 40 to 65 at. % Fe; 
 15 to 45 at. % Cr; 
 5 to 20 at. % Mn; 
 5 at. % Al; and 
 up to 1 at. % [Ti+Nb+V+W+Zr+Hf+B+Mo]. 
 
     
     
         35 . The alloy of any one of the preceding claims wherein the alloy comprises at least 15 at. % Cr. 
     
     
         36 . The alloy of any one of the preceding claims wherein the alloy comprises at least 40% at. % Fe. 
     
     
         37 . The alloy of any one of the preceding claims wherein the at. % ratio of Mn:Al is at least 1. 
     
     
         38 . The alloy of any one of the preceding claims wherein the at. % ratio of Fe:Cr is at least 1. 
     
     
         39 . The alloy of any one of the preceding claims wherein the at. % ratio of Fe:Mn is at least 2. 
     
     
         40 . The alloy of any one of the preceding claims wherein the alloy has an ultimate tensile strength of between about 500 and 900 MPa. 
     
     
         41 . The alloy of any one of the preceding claims wherein the alloy has a 0.2%-offset yield strength of between about 400 and 900 MPa. 
     
     
         42 . The alloy of any one of the preceding claims wherein the alloy has an as-cast hardness (HV) of between about 175 and 280. 
     
     
         43 . The alloy of any one of the preceding claims wherein the alloy has an as-cast hardness (HV) of between about 183 and 272. 
     
     
         44 . The alloy of any one of the preceding claims wherein the alloy has a density of between about 6.9 and 7.38 g/cm 3 . 
     
     
         45 . The alloy of any one of the preceding claims wherein the alloy has a density of between about 7.19 and 7.38 g/cm 3 . 
     
     
         46 . The alloy of any one of the preceding claims wherein the alloy has a single phase body-centred cubic (bcc) crystal structure. 
     
     
         47 . The alloy of any one of  claims 1  to  45  wherein the alloy has two phases with a bcc crystal structure. 
     
     
         48 . The alloy of any one of  claims 1  to  45  wherein the alloy comprises at least about 90 vol. % bcc crystal structure. 
     
     
         49 . The alloy of any one of the preceding claims wherein the alloy comprises 0 to 1 at. % incidental impurities.

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