JP2009544841A5

JP2009544841A5 -

Info

Publication number: JP2009544841A5
Application number: JP2009520711A
Authority: JP
Filing date: 2007-06-20
Publication date: 2010-08-12

Claims

% By weight
10.5 to 30 of Cr,
3 to 15 of Al,
5-20 of Cu,
Up to 0.1 C,
Up to 0.2 N,
Mn of up to 3.0,
Si of up to 2.5,
Mo of maximum 3.0,
The residue of essentially iron and inevitable impurities only,
A pre-alloyed atomized iron-based powder comprising

The powder according to claim 1, wherein the Al content is in the range of 5 to 12% by weight.

The powder according to claim 1 or 2, wherein the Cu content is in the range of 7 to 17% by weight.

The powder according to any one of claims 1 to 3, wherein the Cr content is in the range of 15 to 30% by weight.

The powder according to claim 4, wherein the Cr content is in the range of 20 to 30% by weight.

The powder according to any one of claims 1 to 5, wherein the powder further contains 8 to 20% by weight of Ni.

The powder according to any one of claims 1 to 6, wherein the powder is produced by water spraying.

% By weight
10.5 to 30 of Cr,
3 to 15 of Al,
5-20 of Cu,
Up to 0.1 C,
Up to 0.2 N,
Mn of up to 3.0,
Si of up to 2.5,
Mo of maximum 3.0,
The residue of essentially iron and inevitable impurities only,
A method for producing a pre-alloyed water atomized powder iron-base powder comprising : providing a melt of iron and the alloying element, spraying the melt with water and thereby solidifying the sprayed droplets by comprising forming the powder, the manufacturing method.

The method according to claim 8, wherein the iron-based powder further contains 8 to 20% by weight of Ni.

a)% by weight
10.5 to 30 of Cr,
3 to 15 of Al,
5-20 of Cu,
Up to 0.1 C,
Up to 0.2 N,
Mn of up to 3.0,
Si of up to 2.5,
Mo of maximum 3.0,
The residue of essentially iron and inevitable impurities only,
Providing a sintering material comprising a pre-alloyed water spray powder iron-base powder comprising:
b) forming a green body from the sintering material; and c) sintering the green compact in a reducing or neutral atmosphere at a temperature below atmospheric pressure and above 1100 ° C. ;
A method for manufacturing a sintered part including:

11. A method according to claim 10, wherein the sintering material given in a) is a mixture of a lubricant and / or binder and a pre-alloyed water spray iron-based powder.

The process according to claim 11, wherein the green compact is formed in b) by cold forming of the mixture, preferably the forming pressure is in the range of 100 to 1000 MPa, preferably the temperature is below 100 ° C.

The green compact is formed in step b) by warm forming of the mixture, preferably the forming pressure is in the range of 300 to 1000 MPa, preferably the temperature is in the range of 100 to 200 ° C. Method.

11. The method according to claim 10, wherein the sintering material given in a) is only a pre-alloyed water spray iron-based powder.

The method according to claim 11 or 14, wherein the green compact is formed without compressing the green compact.

The sintered part manufactured by the method according to any one of claims 10 to 14, wherein the sintered density of the part is larger than 6.5 g / cm ³ .

The sintered part manufactured by the method according to any one of claims 10 to 14, wherein the tensile strength of the part is greater than 500 MPa.

The sintered part manufactured by the method according to any one of claims 10 to 14, wherein the yield strength of the part is greater than 400 MPa.