Abstract A composition for producing a metallic sintered body consisting essentially of a mixture of a powdered metal having an average particle size of not more than 50 microns with a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 is disclosed. The composition has excellent properties such as mechanical strength of a green body thereof, and only a short time being necessary for removal or elimination of binder in comparison with conventional sintering compositions. Furthermore, the binder in the present composition is substantially composed of a single component; accordingly, manufacturing process control can be simplified by use of the lactone resin. Furthermore, a method for producing a metallic sintered body using such composition is also disclosed.
A method for producing a metallic sintered body which comprises subjecting a mixture consisting essentially of a powdered metal having an average particle size of not more than 50 microns and a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 to heating to form a brown body and then sintering said brown body at a higher temperature.
Claim 2
Independent Claim
64 words
A method for producing a metallic sintered body which comprises subjecting a mixture consisting essentially of a powdered metal having an average particle size of not more than 50 microns and a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 to heating to form a brown body and then sintering said brown body at a higher temperature.
Claim 3
Dependent Claim
19 words
A method as set forth in claim 1, wherein said mixture additionally includes stearic acid or a metal stearate.
Claim 4
Dependent Claim
35 words
A method as set forth in claim 2, wherein said stearic acid or metal stearate is present in an amount of from 0.1 to 5% by weight, based on the total weight of the composition.
Claim 5
Dependent Claim
35 words
A method as set forth in claim 2, wherein said stearic acid or metal stearate is present in an amount of from 0.3 to 2% by weight, based on the total weight of the composition.
Claim 6
Dependent Claim
32 words
A method as set forth in claim 1, wherein said lactone resin is present in an amount of from 5 to 30% by weight, based on the total weight of the composition.
Claim 7
Dependent Claim
32 words
A method as set forth in claim 1, wherein said lactone resin is present in an amount of from 8 to 10% by weight, based on the total weight of the composition.