EP0906453B1 - Relaxationsfeste stahlfeder - Google Patents
Relaxationsfeste stahlfeder Download PDFInfo
- Publication number
- EP0906453B1 EP0906453B1 EP96919601A EP96919601A EP0906453B1 EP 0906453 B1 EP0906453 B1 EP 0906453B1 EP 96919601 A EP96919601 A EP 96919601A EP 96919601 A EP96919601 A EP 96919601A EP 0906453 B1 EP0906453 B1 EP 0906453B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight percent
- spring
- steel spring
- wire
- steel
- 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.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
Definitions
- the invention relates to a steel spring operating at relatively high working temperatures has a good resistance to relaxation.
- Feathers are known to consist of patented drawn spring steel wires made of unalloyed carbon steels. Such springs are essentially free of scale and residual dirt particles, but are suitable for operating temperatures of Can only be used to a limited extent above 80 ° C. The use is made with greatly reduced Working voltages, their compensation only over a higher application mass the spring can be done, as is known from economic but also brings considerable disadvantages for design reasons. Regarding springs show the relaxation behavior at higher operating temperatures from oil-quenched and tempered unalloyed spring steel and valve spring wires same disadvantages. In addition, as a result of the final oil tariff Surface with scale or residues of other residues release the spring function and in sensitive work areas such as automatic transmissions and fuel injection systems in motor vehicles to significant malfunctions or the complete failure of such units being able to lead.
- Austenitic springs are used to eliminate these disadvantages stainless spring wires, for example of the grade X 12 CrNi 17.7. As a result of the much higher Alloy expenditure and the technological peculiarities however arise unacceptably high material costs for the Spring elements.
- a wire is known from JP-A-2057637 which austenitizes and isothermally kept at 250-500 ° C and then deformed into a spring becomes.
- the holding temperature of 250-500 ° C leads to a so-called Bainite coating with a low ductile bainite structure.
- a subsequent pulling process as used to increase tensile strength would be desirable in itself, at this level Technology not possible.
- the invention has for its object a high-strength increased operating temperatures relaxation-resistant wire springs with scale and residual dirt-free surface and relative to create low material costs.
- a relaxation-proof and heat-resistant tension spring with the following dimensions: Wire diameter 3.6 mm Spring body diameter 41.5 mm Unstretched length L o 268 mm Tensioned spring length L 1 384 mm L2 570 mm is made of 8 mm ⁇ rolled steel with the following composition: 0.68 Weight percent carbon 1.48 Weight percent silicon 0.52 Weight percent chrome 0.65 Weight percent manganese and steel typical accompanying elements.
- This rolled steel is austenitized at 900 ° C, isothermally converted at 540 ° C and then cold drawn to 3.6 mm. A strength Rm of 1900 N / mm 2 is achieved.
- This wire is formed fully automatically into a tension spring with the above-mentioned dimensions and then annealed at 300 ° C for one hour with low stress. Relaxation loss after testing for L2 at 145 ° C one hour: 4.8%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Springs (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
Drahtdurchmesser | 3,6 mm | |
Federkörperdurchmesser | 41,5 mm | |
Ungespannte Länge | Lo | 268 mm |
Gespannte Federlänge | L1 | 384 mm |
L2 | 570 mm |
0,68 | Gewichtsprozente Kohlenstoff |
1,48 | Gewichtsprozente Silizium |
0,52 | Gewichtsprozente Chrom |
0,65 | Gewichtsprozente Mangan und stahltypische Begleitelemente. |
eine Stunde: 4,8 %
Drahtdurchmesser | 1,4 mm |
Außendurchmesser | 7,3 mm |
Ungespannte Länge | 25,4 mm |
zwölf Stunden: 3,5 %
Claims (5)
- Relaxationsfeste Stahlfeder mit hoher Festigkeit, hergestellt aus einem Stahldraht mit der Zusammensetzung vona.) 0,45 bis 0,85 Gewichtsprozenten Kohlenstoff,0,2 bis 1,60 Gewichtsprozenten Silizium,0,3 bis 1,50 Gewichtsprozenten Mangan,0,4 bis 1,2 Gewischcsprozenten Chrom,b.) 0,05 bis 0,30 Gewichtsprozenten Vanadiumbeimengung und/oderc.) 0,005 bis 0,05 Gewichtsprozenten Titan,0,01 bis 0,2 Gewichtsprozenten Niob und/oder Tantal,0,05 bis 0,5 Gewichtsprozenten Molybdänd.) und/oder mit vollständiger oder teilweiser Ersetzung der Elemente Chrom und Silizium durch 0,003 bis 0,01 Gewichtsprozent Bor,e.) sowie im übrigen Eisen und unvermeidliche Beimengungen,f.) austenitisiert und nachfolgend isothermisch im Temperaturbereich zwischen 450 und 650° C wärmebehandelt,g.) anschließend auf eine Zugfestigkeit von 1600 bis 2300 N/mm2 bei einer Brucheinschnürung von mindestens 40 % gezogen,h.) zu einer Feder kalt geformt undi.) nachfolgend im Temperaturbereich von 200 bis 350° C spannungsarm geglüht worden ist.
- Stahlfeder nach Anspruch 1, dadurch gekennzeichnet, daß sie schraubenförmige Gestalt aufweist.
- Stahlfeder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der mittlere Federkerndurchmesser gleich oder kleiner als das vierfache des Drahtdurchmessers ist.
- Stahlfeder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie zur Erhöhung der Dauerhaltbarkeit kugelgestrahlt worden ist.
- Stahlfeder nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie durch überelastische Verformung wahlweise bei Raumtemperatur und/oder bei Temperaturen von bis zu 400° C vorgesetzt worden ist.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE1996/000935 WO1997045565A1 (de) | 1996-05-29 | 1996-05-29 | Relaxationsfeste stahlfeder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0906453A1 EP0906453A1 (de) | 1999-04-07 |
EP0906453B1 true EP0906453B1 (de) | 2001-08-22 |
Family
ID=6918350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96919601A Expired - Lifetime EP0906453B1 (de) | 1996-05-29 | 1996-05-29 | Relaxationsfeste stahlfeder |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0906453B1 (de) |
AT (1) | ATE204612T1 (de) |
AU (1) | AU5810896A (de) |
CA (1) | CA2256384A1 (de) |
DE (1) | DE59607551D1 (de) |
WO (1) | WO1997045565A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018183499A1 (en) | 2017-03-28 | 2018-10-04 | National Oilwell DHT, L.P. | Valves for actuating downhole shock tools in connection with concentric drive systems |
CN107557671B (zh) * | 2017-10-26 | 2019-05-14 | 山东汽车弹簧厂淄博有限公司 | 微合金化弹簧钢及其制备方法 |
CN107587079B (zh) * | 2017-10-26 | 2019-05-14 | 山东汽车弹簧厂淄博有限公司 | 含氮微合金化弹簧钢及其制备方法 |
CN109161629A (zh) * | 2018-08-16 | 2019-01-08 | 敬业钢铁有限公司 | 一种弹簧钢的lf精炼方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE404703C (sv) * | 1976-09-20 | 1986-06-23 | Garphytte Bruk Ab | Ventilfjedertrad av laglegerat stal |
JPS5925024B2 (ja) * | 1980-06-26 | 1984-06-13 | 株式会社神戸製鋼所 | 懸架ばね用鋼 |
JPH0796697B2 (ja) * | 1986-10-24 | 1995-10-18 | 大同特殊鋼株式会社 | 高強度ばね用鋼 |
JP2613601B2 (ja) * | 1987-09-25 | 1997-05-28 | 日産自動車株式会社 | 高強度スプリング |
JPH0257637A (ja) * | 1988-08-23 | 1990-02-27 | Nippon Steel Corp | 高疲労強度ばねの製造方法及びそれに用いるばね用鋼線 |
CA2002138C (en) * | 1988-11-08 | 1999-12-14 | Susumu Yamamoto | High-strength coil spring and method of producing same |
JPH02240240A (ja) * | 1989-03-10 | 1990-09-25 | Aisin Seiki Co Ltd | 自動車用クラッチのダイヤフラムスプリング |
-
1996
- 1996-05-29 AU AU58108/96A patent/AU5810896A/en not_active Abandoned
- 1996-05-29 EP EP96919601A patent/EP0906453B1/de not_active Expired - Lifetime
- 1996-05-29 WO PCT/DE1996/000935 patent/WO1997045565A1/de active IP Right Grant
- 1996-05-29 DE DE59607551T patent/DE59607551D1/de not_active Expired - Lifetime
- 1996-05-29 CA CA002256384A patent/CA2256384A1/en not_active Abandoned
- 1996-05-29 AT AT96919601T patent/ATE204612T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE59607551D1 (de) | 2001-09-27 |
EP0906453A1 (de) | 1999-04-07 |
ATE204612T1 (de) | 2001-09-15 |
AU5810896A (en) | 1998-01-05 |
CA2256384A1 (en) | 1997-12-04 |
WO1997045565A1 (de) | 1997-12-04 |
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