Alloyed steel powder for powder metallurgy, iron-based mixed powder for powder metallurgy, and sintered body

Abstract

Provided is an alloyed steel powder for powder metallurgy which has excellent compressibility and can be used to produce a sintered body that obtains improved strength simply by sintering. The alloyed steel powder for powder metallurgy contains Cu: 1.0 mass % or more and 8.0 mass % or less, Mo: more than 0.50 mass % and 2.00 mass % or less, and at least one selected from the group consisting of V: 0.05 mass % or more and 0.50 mass % or less, Nb: 0.02 mass % or more and 0.40 mass % or less, and Ti: 0.02 mass % or more and 0.40 mass % or less, with the balance consisting of Fe and inevitable impurities.

1 . An alloyed steel powder for powder metallurgy, comprising
 Cu: 1.0 mass % or more and 8.0 mass % or less,   Mo: more than 0.50 mass % and 2.00 mass % or less, and   at least one selected from the group consisting of V: 0.05 mass % or more and 0.50 mass % or less, Nb: 0.02 mass % or more and 0.40 mass % or less, and Ti: 0.02 mass % or more and 0.40 mass % or less,   with the balance consisting of Fe and inevitable impurities.   
     
     
         2 . The alloyed steel powder for powder metallurgy according to  claim 1 , comprising V: 0.05 mass % or more and 0.50 mass % or less. 
     
     
         3 . The alloyed steel powder for powder metallurgy according to  claim 1 , comprising Nb: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         4 . The alloyed steel powder for powder metallurgy according to  claim 1 , comprising Ti: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         5 . An iron-based mixed powder for powder metallurgy,
 comprising the alloyed steel powder for powder metallurgy according to  claim 1  and a metal powder, wherein   the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy.   
     
     
         6 . A sintered body using the alloyed steel powder for powder metallurgy according to  claim 1 . 
     
     
         7 . The alloyed steel powder for powder metallurgy according to  claim 2 , comprising Nb: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         8 . The alloyed steel powder for powder metallurgy according to  claim 2 , comprising Ti: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         9 . The alloyed steel powder for powder metallurgy according to  claim 3 , comprising Ti: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         10 . The alloyed steel powder for powder metallurgy according to  claim 7 , comprising Ti: 0.02 mass % or more and 0.40 mass % or less. 
     
     
         11 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 2  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         12 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 3  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         13 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 4  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         14 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 7  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         15 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 8  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         16 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 9  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         17 . An iron-based mixed powder for powder metallurgy, comprising the alloyed steel powder for powder metallurgy according to  claim 10  and a metal powder, wherein
 the metal powder is either or both of a Cu powder of more than 0 mass % and 4 mass % or less and a Mo powder of more than 0 mass % and 4 mass % or less with respect to 100 mass % of the iron-based mixed powder for powder metallurgy. 
 
     
     
         18 . A sintered body using the iron-base mixed powder for powder metallurgy according to  claim 5 .