EP0380630A4 - High damping capacity, two-phase fe-mn-al-c alloy - Google Patents
High damping capacity, two-phase fe-mn-al-c alloyInfo
- Publication number
- EP0380630A4 EP0380630A4 EP19890908610 EP89908610A EP0380630A4 EP 0380630 A4 EP0380630 A4 EP 0380630A4 EP 19890908610 EP19890908610 EP 19890908610 EP 89908610 A EP89908610 A EP 89908610A EP 0380630 A4 EP0380630 A4 EP 0380630A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- cast iron
- alloys
- phase
- damping capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
Definitions
- Figure 1 depicts the damping capacity curve for an alloy of the invention
- Figure 2 depicts the damping capacity curve for ductile iron.
- Fe-Mn-Al-C alloys manganese ⁇ •- ⁇ tnd carbon are gamma- phase formers andaluminum is an alpha-phase former.
- Fe-Mn-Al-C alloys canbe disigned to be fully gamma phase, such as Fe-29Mn-7Al-lC. Reduction of the manganese or carbon or both of them and the increase of aluminum can promote the appearance of alpha phase, and make the alloy an alpha+gamma to-phase steel.
- the volume fraction of alpha phase can be controlled bychanging the amount of manganese or aluminum or carbon or other ferrite-forming elements.
- Alloys according to the invention contain, in weight percent, 107. to 457 0 manganese, 47, to 127. aluminum, up to 127, chromium, 0.01% to 0.77o carbon, balance essentially iron, and are charac ⁇ terized by a microstructure containing about 257. to 757,ferrite, with the remainder austenite and bya high damping capacity on the order of a cast iron. Minor amounts of Ni,Mo,Cb,Co,Si, etc. may be included in the allov.
- This example illustrates the effect of the element compositions on the change of ⁇ volume fraction in the Fe-Mn-Al-C based alloys.
- Manganese and carbon are austenite phase stabilizers and aluminum is a ferrite phase former.
- the effect of the carbon content on the ferrite fraction of the Fe-Mn-Al-C based alloys is shown in
- Table I in which the chemical composition of aluminum and manganese are essentially constant and the carbon content decreases from 0.5 wt% to 0.11 wt%.
- the ferrite phase volume fractions of the alloys increases from 0% to 36%.
- the volume fractions of ferrite phase and balanced ⁇ phase is controlled to be from 25% to 75%. Within this ferrite fraction range, excellent damping capacity is always found in the Fe-Mn-Al-C based alloy.
- This example illustrates the good damping capacity of the said ⁇ -- ⁇ two-phase Fe-Mn-Al-C based alloys which have been measured and determined with comparison to ductile cast iron.
- the test sample of the invention contained 19.7Mn-5.84Al-5.74Cr-0.19C.
- the ferrite volume fraction is about 65% balanced with ⁇ phase.
- the damping capacity curves of the damping capacity tests of the Fe-Mn-Al-C based alloy and ductile cast iron are shown in Fig. 1 and Fig. 2. It is seen that the damping capacities of the two alloys are almost equivalent.
- This example illustrates the good workability of ⁇ + ⁇ two-phase Fe-Mn-Al-C based alloys.
- the alloys listed in Table II were cast into ingot; homogenized at 1200°C; cut and hot forged at 1200°C; further annealed at 1150°C and descaled.
- the alloys were cold rolled ' into 2.0 mm thick strip and annealed.
- the ferrite volume percentages of these strips were measured and are listed in Table III.
- the mechanical properties of these annealed strips are also listed in Table III. It is seen that the alloys of the invention have good workablility and excellent mechanical properties.
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US218695 | 1988-07-08 | ||
US07/218,695 US4875933A (en) | 1988-07-08 | 1988-07-08 | Melting method for producing low chromium corrosion resistant and high damping capacity Fe-Mn-Al-C based alloys |
US341117 | 1989-04-20 | ||
US07/341,117 US4966636A (en) | 1988-07-08 | 1989-04-20 | Two-phase high damping capacity F3-Mn-Al-C based alloy |
PCT/US1989/002950 WO1990000629A1 (en) | 1988-07-08 | 1989-07-06 | High damping capacity, two-phase fe-mn-al-c alloy |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0380630A1 EP0380630A1 (en) | 1990-08-08 |
EP0380630A4 true EP0380630A4 (en) | 1990-12-27 |
EP0380630B1 EP0380630B1 (en) | 1994-11-30 |
Family
ID=26913151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89908610A Expired - Lifetime EP0380630B1 (en) | 1988-07-08 | 1989-07-06 | Use of a high damping capacity, two-phase fe-mn-al-c alloy |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0380630B1 (en) |
JP (1) | JPH03500305A (en) |
AT (1) | ATE114736T1 (en) |
AU (1) | AU610429B2 (en) |
CA (1) | CA1336364C (en) |
DE (1) | DE68919672T2 (en) |
WO (1) | WO1990000629A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR960006453B1 (en) * | 1993-10-22 | 1996-05-16 | 최종술 | Making method of vibration decrease alloy steel & the manufacturing process |
DE10259230B4 (en) * | 2002-12-17 | 2005-04-14 | Thyssenkrupp Stahl Ag | Method for producing a steel product |
RU2401877C2 (en) * | 2005-02-02 | 2010-10-20 | Корус Стал Бв | Austenite steel of high strength, procedure for production of said steel and its application |
KR20080111032A (en) | 2006-04-20 | 2008-12-22 | 아사히 가라스 가부시키가이샤 | Core-shell silica and method for producing same |
WO2013064202A1 (en) * | 2011-11-03 | 2013-05-10 | Tata Steel Nederland Technology B.V. | Method of manufacturing a duplex steel sheet having enhanced formability |
WO2013178887A1 (en) | 2012-05-31 | 2013-12-05 | Arcelormittal Investigación Desarrollo Sl | Low-density hot- or cold-rolled steel, method for implementing same and use thereof |
CN104674109B (en) * | 2015-03-11 | 2017-01-18 | 北京科技大学 | Low-density Fe-Mn-Al-C system cold-rolled automobile steel plate and preparation method |
KR101910744B1 (en) * | 2017-07-26 | 2018-10-22 | 포항공과대학교 산학협력단 | Medium-entropy alloys with excellent cryogenic properties |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB949786A (en) * | 1959-06-23 | 1964-02-19 | United States Steel Corp | Austenitic stainless steel |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA655825A (en) * | 1963-01-15 | Ciba Limited | Unsaturated aliphatic amino-diols and process for their manufacture | |
AU8261182A (en) * | 1981-04-22 | 1982-10-28 | Unisearch Limited | Oxidation and corrosion-resistant febase-al-mn alloys |
JPS60248866A (en) * | 1984-05-24 | 1985-12-09 | Yamato Metal Kogyo Kk | Stainless steel for cryogenic service having excellent sea water resistance |
-
1989
- 1989-07-06 DE DE68919672T patent/DE68919672T2/en not_active Expired - Fee Related
- 1989-07-06 AU AU39815/89A patent/AU610429B2/en not_active Ceased
- 1989-07-06 EP EP89908610A patent/EP0380630B1/en not_active Expired - Lifetime
- 1989-07-06 JP JP1508050A patent/JPH03500305A/en active Pending
- 1989-07-06 AT AT89908610T patent/ATE114736T1/en not_active IP Right Cessation
- 1989-07-06 WO PCT/US1989/002950 patent/WO1990000629A1/en active IP Right Grant
- 1989-07-07 CA CA000605033A patent/CA1336364C/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB949786A (en) * | 1959-06-23 | 1964-02-19 | United States Steel Corp | Austenitic stainless steel |
Also Published As
Publication number | Publication date |
---|---|
AU3981589A (en) | 1990-02-05 |
WO1990000629A1 (en) | 1990-01-25 |
EP0380630A1 (en) | 1990-08-08 |
DE68919672T2 (en) | 1995-04-06 |
JPH03500305A (en) | 1991-01-24 |
AU610429B2 (en) | 1991-05-16 |
EP0380630B1 (en) | 1994-11-30 |
ATE114736T1 (en) | 1994-12-15 |
DE68919672D1 (en) | 1995-01-12 |
CA1336364C (en) | 1995-07-25 |
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