US2005129562A1PendingUtilityA1

Method for the manufacturing of sintered metal parts

41
Assignee: HOEGANAES ABPriority: Oct 17, 2003Filed: Oct 18, 2004Published: Jun 16, 2005
Est. expiryOct 17, 2023(expired)· nominal 20-yr term from priority
Inventors:Linnea FordenSven Bengtsson
B22F 2998/00B22F 2999/00B22F 2998/10B22F 3/1007B22F 3/164
41
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

The present invention concerns a method for producing powder metal parts having a densified surface. The method comprises the steps: compacting an iron or iron-based powder by high velocity compacting technique to a density above 7.2 g/cm 3 sintering the parts subjecting the parts to a surface densifying process.

Claims

exact text as granted — not AI-modified
1 . Method for producing powder metal parts having a densified surface, comprising the steps of 
 compacting an iron or iron-based powder by high velocity compacting technique to a density above 7.2 g/cm 3      sintering the parts    subjecting the parts to a surface densifying process.    
     
     
         2 . Method according to  claim 1 , wherein sintering is performed at low temperature.  
     
     
         3 . Method according to  claim 1 , wherein surface densifying is performed by rolling.  
     
     
         4 . Method according to  claim 1 , wherein the parts are compacted to a density of at least 7.3 g/cm 3 .  
     
     
         5 . Method according to  claim 1 , wherein the parts are sintered at a temperature below 1160° C.  
     
     
         6 . Method according to  claim 5 , wherein the compacted parts are sintered in a temperature between 1120° C. and 1150° C.  
     
     
         7 . Method according to  claim 1 , wherein the compacted parts are sintered for a time of 15 to 60 minutes.  
     
     
         8 . Method according to  claim 1 , wherein the compacted parts are sintered in an endogas atmosphere, a mixture between hydrogen and nitrogen or in vaccuum.  
     
     
         9 . Method according to  claim 1 , wherein the surface densified parts are densified to a depth of at least 0.3 mm.  
     
     
         10 . Method according to  claim 1 , wherein the produced powder metal parts are gears, bearings, rolls, sprockets etc.  
     
     
         11 . Method according to  claim 1 , wherein the parts are compacted to a density of at least 7.4 g/cm 3 .  
     
     
         12 . Method according to  claim 2 , wherein the parts are compacted to a density of at least 7.3 g/cm 3 .  
     
     
         13 . Method according to  claim 3 , wherein the parts are compacted to a density of at least 7.3 g/cm 3 .  
     
     
         14 . Method according to  claim 2 , wherein the parts are compacted to a density of at least 7.4 g/cm 3 .  
     
     
         15 . Method according to  claim 3 , wherein the parts are compacted to a density of at least 7.4 g/cm 3 .  
     
     
         16 . Method according to  claim 2 , wherein the compacted parts are sintered for a time of 15 to 60 minutes.  
     
     
         17 . Method according to  claim 4 , wherein the compacted parts are sintered for a time of 15 to 60 minutes.  
     
     
         18 . Method according to  claim 4 , wherein the compacted parts are sintered in an endogas atmosphere, a mixture between hydrogen and nitrogen or in vaccuum.  
     
     
         19 . Method according to  claim 1 , wherein the surface densified parts are densified to a depth of at least 0.5 mm.  
     
     
         20 . Method according to  claim 2 , wherein the surface densified parts are densified to a depth of at least 0.3 mm.

Join the waitlist — get patent alerts

Track US2005129562A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.