Patent US5969276A successfully refreshed from Google Patents.
US5969276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese containing materials having high tensile strength
Assignee: Hoganas AB
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Filing: 1995-11-21
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Granted: 1999-10-19
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Expires: 2015-11-21
Abstract
Abstract The invention concerns an iron-based powder for powder-metallurgically producing components by powder compacting and sintering. The powder contains 0.25-2.0% by weight of Mo, 1.2-3.5% by weight of Mn, 0.5-1.75% by weight of Si and 0.2-1.0% by weight of C and not more than 2% by weight of impurities including less than 0.25% by weight of Cu. The invention also includes a method for preparing sintered components from this iron powder, as well as the sintered products.
Inventors
- 👤 Caroline Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:33
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
62 words
An iron-based powder for producing porous components by powder compacting and sintering, comprising in addition to iron 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-1.0% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight of Ni.
Claim 2
Dependent Claim
62 words
An iron-based powder for producing porous components by powder compacting and sintering, comprising in addition to iron 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-1.0% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight of Ni.
Claim 3
Dependent Claim
17 words
A powder according to claim 1, characterised in that the amount of Mo is 0.6-2.0% by weight.
Claim 4
Dependent Claim
17 words
A powder according to claim 1, characterised in that the amount of Mn is 1.3-3.0% by weight.
Claim 5
Dependent Claim
17 words
A powder according to claim 1, characterised in that the amount of Si is 0.7-1.50% by weight.
Claim 6
Dependent Claim
18 words
A powder according to of claim 1, characterised in that the amount of C is 0.3-0.9% by weight.
Claim 7
Dependent Claim
26 words
A powder according to of claim 1, characterised in that Mn and Si are added in the form of ferromanganese, ferrosilicon or a silicon-manganese-iron master alloy.
Claim 8
Dependent Claim
23 words
A powder according to claim 6, characterised in that the weight ratio manganese/silicon of the silicon-manganese-iron master alloy varies between 1 and 3.
Claim 9
Dependent Claim
22 words
A powder according to claim 1, characerterised in that Mo is added in the form of a prealloy of Fe and Mo.
Claim 10
Dependent Claim
28 words
A powder according to claim 1, characterised in that it includes inevitable impurities in the following ranges Cr<0.25 Cu<0.25 Ni<0.25 Al<0.20 P<0.05 S<0.05 O<0.03 N<0.02 Be<0.01 B<0.02 Others<0.5.
Claim 11
Dependent Claim
55 words
A powder-metallurgically produced porous component, which in addition to iron comprises 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-0.70% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight Ni.
Claim 12
Dependent Claim
55 words
A powder-metallurgically produced porous component, which in addition to iron comprises 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-0.70% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight Ni.
Claim 13
Independent Claim
76 words
A method of powder-metallurgically producing sintered porous components, characterised by using an iron-based powder comprising 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-1.0% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight Ni; compacting the powder into the desired shape and sintering the compact at a temperature above 1120° C.
Claim 14
Independent Claim
76 words
A method of powder-metallurgically producing sintered porous components, characterised by using an iron-based powder comprising 0.25-2.0% by weight of Mo 1.2-3.5% by weight of Mn 0.5-1.75% by weight of Si 0.2-1.0% by weight of C and not more than 1% by weight of impurities including less than 0.25% by weight of Cu and less than 0.25% by weight Ni; compacting the powder into the desired shape and sintering the compact at a temperature above 1120° C.
Claim 15
Dependent Claim
17 words
A powder according to claim 2, characterised in that the amount of Si is 0.5-1.50% by weight.
Claim 16
Dependent Claim
17 words
A powder according to claim 3, characterised in that the amount of Si is 0.5-1.50% by weight.
Claim 17
Dependent Claim
17 words
A powder according to claim 2, characterised in that the amount of C is 0.3-0.9% by weight.
Claim 18
Dependent Claim
17 words
A powder according to claim 3, characterised in that the amount of C is 0.3-0.9% by weight.
Claim 19
Dependent Claim
24 words
A powder according to claim 2, characterised in that Mn and Si are added in the form of ferromanganese, ferrosilicon or a silicon-manganese-iron master.
Claim 20
Dependent Claim
24 words
A powder according to claim 3, characterised in that Mn and Si are added in the form of ferromanganese, ferrosilicon or a silicon-manganese-iron master.
Claim 21
Dependent Claim
14 words
A component according to claim 10, having a homogeneous microstructure of bainite and martensite.
Claim 22
Dependent Claim
16 words
A powder according to claim 1, having a homogenous microstructure of bainite and martensite when sintered.
Claim 23
Dependent Claim
18 words
A method according to claim 11, wherein the sintered compact has a homogenous microstructure of bainite and martensite.
Claim 24
Dependent Claim
11 words
A component according to claim 10, having less than 0.15% Cu.
Claim 25
Dependent Claim
11 words
A powder according to claim 1, having less than 0.15% Cu.
Claim 26
Dependent Claim
15 words
A method according to claim 11, wherein the sintered compact has less than 0.15% Cu.
References Cited (Backward Citations)
US2797162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |