US2003233911A1PendingUtilityA1

Pre-alloyed iron based powder

42
Priority: Jun 14, 2002Filed: Aug 1, 2002Published: Dec 25, 2003
Est. expiryJun 14, 2022(expired)· nominal 20-yr term from priority
Inventors:Ulf EngstromSigurd Berg
C22C 38/22B22F 2998/10C22C 38/04C22C 38/004C22C 33/0264C22C 38/20
42
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Claims

Abstract

The invention concerns a new pre alloyed steel powder comprising in addition to iron and inevitable impurities, by wt %, 1.3-1.7% by weight of Cr, 0.15-0.3% by weight of Mo, 0.09-0.3% by weight of Mn, not larger than 0.01 by weight of C, not larger than 0.25% of O.

Claims

exact text as granted — not AI-modified
1 . A pre-alloyed steel powder comprising, in addition to iron and inevitable impurities, by wt %, 1.3-1.7% by weight of Cr 0.15-0.3% by weight of Mo 0.09-0.3% by weight of Mn 
 not larger than 0.01 by weight of C    not larger than 0.25% of O.    
     
     
         2 . A alloy steel powder according to  claim 1  further comprising Ti, B, V and Nb as pre-alloyed elements.  
     
     
         3 . A alloy steel powder according to  claim 2  including, in % by weight, 0.01-0.04 of Ti, 0.01-0.04 of B, 0.05-0.3 of V and not more than 0.1 of Nb.  
     
     
         4 . A alloy steel powder according to  claim 1 ,  2  or  3  admixed with at least one element selected from the group consisting of Cu and Ni.  
     
     
         5 . A alloy steel powder according to  claim 1 ,  2  or  3  wherein particles of at least one element selected from the group consisting of Cu and Ni are bonded to the alloy steel powder.  
     
     
         6 . A alloy steel powder according to  claim 4  or  5 , wherein the amount of Cu is 0.5-3.0% by weight.  
     
     
         7 . A alloy steel powder according to  claim 4  or  5 , wherein the amount of Ni is 0.5-3.0%by weight.  
     
     
         8 . Alloy steel powder according to any one of the preceding claims admixed with graphite.  
     
     
         9 . A alloy steel powder according to any one of the preceding claims admixed with a lubricant.  
     
     
         10 . A alloy steel powder according to  claim 9  characterized in that the lubricant is a cold compaction lubricant selected from the group consisting of metal soaps and waxes.  
     
     
         11 . A alloy steel powder according to any one of the preceding claims comprising 
 1.35-1.65% by weight of Cr    0.17-0.27% by weight of Mo    0.09-0.2% by weight of Mn    not larger than 0.006 by weight of c

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