EP0178222A1 - Steel alloys, particularly for tubes for bicycle frames - Google Patents
Steel alloys, particularly for tubes for bicycle frames Download PDFInfo
- Publication number
- EP0178222A1 EP0178222A1 EP85401923A EP85401923A EP0178222A1 EP 0178222 A1 EP0178222 A1 EP 0178222A1 EP 85401923 A EP85401923 A EP 85401923A EP 85401923 A EP85401923 A EP 85401923A EP 0178222 A1 EP0178222 A1 EP 0178222A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- less
- tubes
- weight
- content
- 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
- 229910000851 Alloy steel Inorganic materials 0.000 title description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000011651 chromium Substances 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Definitions
- the present invention relates to an alloy steel intended for heat treatments and usable, in particular, for cycle tubes.
- the reference heat treatment consists of quenching at 860 ° C and tempering at 550 ° C.
- a steel of this type is used for tubes of cycle frames. This steel must be brazed when the frames are manufactured. We seek to lighten the frames as much as possible and we need steels with maximum tensile strength.
- the present invention aims to provide a steel derived from a steel of the previous type and having improved tensile strength.
- the invention provides an alloy steel with disperses which, in addition to a good tensile strength, has a remarkable ability to deformation in hot and cold and a good ability to brazing.
- the desired objective is achieved by a steel resistant to traction and to fatigue and having good brazing properties, comprising by weight, 0.23 to 0.29% of carbon, 0.23 to 0.28% of silicon, 0.15 to 0.25% of molybdenum, less than 0.035% of phosphorus, less than 0.035% of sulfur, the balance being formed by iron and the usual impurities, and characterized in that it comprises 1 to 1, 35% manganese, 0.20 to 0.40% chromium, 0.08 to 0.15% vanadium.
- the carbon content is between 0.23 and 0.29 X by weight.
- the steel contains manganese in a proportion of between 1 and 1.35% and preferably between 1.10 and 1.20 X. This element strengthens tensile strength.
- the phosphorus or sulfur content does not exceed 0.035 X.
- the steel contains chromium with a content of between 0.20 and 0.40% and preferably between 0.25 and 0.30 X.
- the steel contains molybdenum with a content of between 0.15 and 0.25% .
- the steel contains vanadium with a content of between 0.08 and 0.15% and preferably between 0.08 and 0.12%. This element gives steel improved tensile strength by forming ultrafine precipitates (dispersoids).
- the silicon content is between 0.23 and 0.28%.
- the nickel content is less than 0.20 X.
- Aluminum is added to the steel so that the final aluminum content is between 0.01 and 0.02%. This addition is carried out in the form of a wire, in an ingot mold. Aluminum acts as a fine grain stabilizer without having a role of deoxidizer.
- Steel can contain residual elements such as copper and tin.
- the maximum content tolerated is 0.1% for copper and 0.01 X for tin.
- the heat treatment of the steel according to the invention corresponds substantially to the reference heat treatment of 25CD4 steel.
- This standard heat treatment consists of quenching at around 860 ° C and tempering at around 550 ° C.
- the steel grades A and B above were tested by tensile strength, fatigue and brazing tests.
- the steels according to the invention have good tensile strength. This tensile strength is of the order of 860 N / mm 2 .
- 25CD4 steel has a tensile strength of the order of 760 N / mm 2 .
- the steels according to the invention exhibit remarkable resistance to fatigue.
- the steels according to the invention are entirely suitable for brazing because they allow overheating up to 1100/1200 ° C without altering the mechanical properties.
- the steel according to the invention is particularly suitable for manufacturing tubes intended for the manufacture of cycle frames.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
Description
La présente invention se rapporte à un acier allié destiné aux traitements thermiques et utilisable, notamment, pour des tubes de cycles.The present invention relates to an alloy steel intended for heat treatments and usable, in particular, for cycle tubes.
On connaît sous la dénomination AFNOR 25CD4 un acier allié dont la composition théorique est : 0,25 X de carbone, 0,75 X de manganèse, 0,25 % de silicium, 1 % de chrome, 0,22 % de molybdène, moins de 0,035 % de phosphore, moins de 0,035 % de soufre, le solde étant formé par le fer et les impuretés habituelles.Known under the name AFNOR 25CD4 an alloy steel which is the theoretical content: 0.25 X atoms, X 0.75 manganese, 0, 2 5% silicon, 1% chromium, 0.22% molybdenum, less than 0.035% phosphorus, less than 0.035% sulfur, the balance being formed by iron and the usual impurities.
Le traitement thermique de référence consiste en une trempe à 860°C et un revenu à 550°C.The reference heat treatment consists of quenching at 860 ° C and tempering at 550 ° C.
On utilise un acier de ce type pour des tubes de cadres de cycles. Cet acier doit être brasé au moment de la fabrication des cadres. On cherche à alléger au maximum les cadres et on a besoin d'aciers dont la résistance à la traction est maximum.A steel of this type is used for tubes of cycle frames. This steel must be brazed when the frames are manufactured. We seek to lighten the frames as much as possible and we need steels with maximum tensile strength.
La présente invention a pour but de fournir un acier dérivé d'un acier du type précédent et présentant une résistance à la traction améliorée. L'invention fournit un acier allié avec dispersoldes qui, outre une bonne résistance à la traction, présente une aptitude à la déformation à chaud et à froid remarquable et une bonne aptitude au brasage.The present invention aims to provide a steel derived from a steel of the previous type and having improved tensile strength. The invention provides an alloy steel with disperses which, in addition to a good tensile strength, has a remarkable ability to deformation in hot and cold and a good ability to brazing.
Le but recherché est atteint par un acier résistant à la traction et à la fatigue et ayant de bonnes propriétés de brasage, comportant en poids, 0,23 à 0,29 % de carbone, 0,23 à 0,28 % de silicium, 0,15 à 0,25 % de molybdène, moins de 0,035 % de phosphore, moins de 0,035 % de soufre, le solde étant formé par le fer et les impuretés habituelles, et caractérisé par le fait qu'il comporte 1 à 1,35 % de manganèse, 0,20 à 0,40 % de chrome, 0,08 à 0,15 % de vanadium.The desired objective is achieved by a steel resistant to traction and to fatigue and having good brazing properties, comprising by weight, 0.23 to 0.29% of carbon, 0.23 to 0.28% of silicon, 0.15 to 0.25% of molybdenum, less than 0.035% of phosphorus, less than 0.035% of sulfur, the balance being formed by iron and the usual impurities, and characterized in that it comprises 1 to 1, 35% manganese, 0.20 to 0.40% chromium, 0.08 to 0.15% vanadium.
D'autres caractéristiques et avantages de l'invention ressortiront de la description suivante.Other characteristics and advantages of the invention will emerge from the following description.
La teneur en carbone est comprise en poids entre 0,23 et 0,29 X. L'acier contient du manganèse dans une proportion comprise entre 1 et 1,35 % et de préférence entre 1,10 et 1,20 X. Cet élément renforce la résistance à la traction.The carbon content is between 0.23 and 0.29 X by weight. The steel contains manganese in a proportion of between 1 and 1.35% and preferably between 1.10 and 1.20 X. This element strengthens tensile strength.
La teneur en phosphore ou en soufre ne dépasse pas 0,035 X.The phosphorus or sulfur content does not exceed 0.035 X.
L'acier contient du chrome avec une teneur comprise entre 0,20 et 0,40 % et préférentiellement entre 0,25 et 0,30 X. L'acier comporte du molybdène avec une teneur comprise entre 0,15 et 0,25 %.The steel contains chromium with a content of between 0.20 and 0.40% and preferably between 0.25 and 0.30 X. The steel contains molybdenum with a content of between 0.15 and 0.25% .
L'acier contient du vanadium avec une teneur comprise entre 0,08 et 0,15 % et préférentiellement entre 0,08 et 0,12 %. Cet élément confère à l'acier une résistance à la traction améliorée en formant des précipités ultrafins (dispersoîdes).The steel contains vanadium with a content of between 0.08 and 0.15% and preferably between 0.08 and 0.12%. This element gives steel improved tensile strength by forming ultrafine precipitates (dispersoids).
. La teneur en silicium est comprise entre 0,23 et 0,28 %.. The silicon content is between 0.23 and 0.28%.
La teneur en nickel est inférieure à 0,20 X.The nickel content is less than 0.20 X.
De l'aluminium est ajouté à l'acier de manière que la teneur finale en aluminium soit comprise entre 0,01 et 0,02 %. Cette addition est effectuée sous forme de fil, en lingotière. L'aluminium joue le rôle de stabilisateur de grain fin sans avoir un rôle de désoxydant.Aluminum is added to the steel so that the final aluminum content is between 0.01 and 0.02%. This addition is carried out in the form of a wire, in an ingot mold. Aluminum acts as a fine grain stabilizer without having a role of deoxidizer.
L'acier peut contenir des éléments résiduels tels que le cuivre et l'étain. La teneur maximum tolérée est de 0,1 % pour le cuivre et de 0,01 X pour l'étain.Steel can contain residual elements such as copper and tin. The maximum content tolerated is 0.1% for copper and 0.01 X for tin.
A titre d'exemple, on a étudié plus particulièrement deux nuances d'acier conformes à l'invention et qui sont référencées A et B. Les compositions pondérales en % sont données dans le tableau 1 ci-dessous.
Le traitement thermique de l'acier selon l'invention correspond sensiblement au traitement thermique de référence de l'acier 25CD4. Ce traitement thermique de référence consiste en une trempe à 860°C environ et un revenu à 550°C environ.The heat treatment of the steel according to the invention corresponds substantially to the reference heat treatment of 25CD4 steel. This standard heat treatment consists of quenching at around 860 ° C and tempering at around 550 ° C.
Les nuances d'acier A et B ci-dessus ont été testées par des essais de résistance à la traction, de fatigue et de brasage. Les aciers selon l'invention présentent une bonne résistance à la traction. Cette résistance à la traction est de l'ordre de 860 N/mm2. A titre de comparaison l'acier 25CD4 présente une résistance à la traction de l'ordre de 760 N/mm2.The steel grades A and B above were tested by tensile strength, fatigue and brazing tests. The steels according to the invention have good tensile strength. This tensile strength is of the order of 860 N / mm 2 . By way of comparison, 25CD4 steel has a tensile strength of the order of 760 N / mm 2 .
Les aciers selon l'invention présentent une résistance à la fatigue remarquable.The steels according to the invention exhibit remarkable resistance to fatigue.
Les aciers selon l'invention sont tout-à-fait adaptés au brasage du fait qu'ils autorisent des surchauffes jusqu'à 1100/1200°C sans altération des propriétés mécaniques.The steels according to the invention are entirely suitable for brazing because they allow overheating up to 1100/1200 ° C without altering the mechanical properties.
L'acier selon l'invention est particulièrement approprié pour fabriquer des tubes destinés à la fabrication de cadres de cycles.The steel according to the invention is particularly suitable for manufacturing tubes intended for the manufacture of cycle frames.
Claims (5)
caractérisé par le fait qu'il comporte 1 à 1,35 % de manganèse, 0,20 à 0,40 % de chrome, 0,08 à 0,15 % de vanadium.1.- Steel comprising, by weight, 0.23 to 0.29% of carbon, 0.23 to 0.28% of silicon, 0.15 to 0.25% of molybdenum, less than 0.035% of phosphorus, less 0.035% sulfur, the balance being formed by iron and the usual impurities,
characterized by the fact that it contains 1 to 1.35% of manganese, 0.20 to 0.40% of chromium, 0.08 to 0.15% of vanadium.
caractérisé par le fait qu'il comporte 1 à 1,20 % de manganèse, 0,25 à 0,30 % de chrome, 0,08 à 0,12 % de vanadium.2.- Steel comprising, by weight, 0.23 to 0.29% of carbon, 0.23 to 0.28% of silicon, 0.15 to 0.25% of molybdenum, less than 0.035% of phosphorus, less 0.035% sulfur, the balance being formed by iron and the usual impurities,
characterized by the fact that it contains 1 to 1.20% of manganese, 0.25 to 0.30% of chromium, 0.08 to 0.12% of vanadium.
caractérisé par le fait qu'il comporte en poids jusqu'à 0,1 % de cuivre et jusqu'à 0,01 % d'étain.3.- Steel according to claim 1 or 2,
characterized in that it contains by weight up to 0.1% copper and up to 0.01% tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85401923T ATE36175T1 (en) | 1984-10-12 | 1985-10-02 | ALLOY STEEL, ESPECIALLY FOR TUBES FOR BICYCLE FRAME. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8415665 | 1984-10-12 | ||
| FR8415665A FR2571741B1 (en) | 1984-10-12 | 1984-10-12 | ALLOY STEEL FOR, IN PARTICULAR, CYCLE TUBES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0178222A1 true EP0178222A1 (en) | 1986-04-16 |
| EP0178222B1 EP0178222B1 (en) | 1988-08-03 |
Family
ID=9308603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85401923A Expired EP0178222B1 (en) | 1984-10-12 | 1985-10-02 | Steel alloys, particularly for tubes for bicycle frames |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0178222B1 (en) |
| AT (1) | ATE36175T1 (en) |
| DE (1) | DE3564134D1 (en) |
| FR (1) | FR2571741B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0526330A1 (en) * | 1991-07-30 | 1993-02-03 | Ascometal | Process for making thinwalled tubes, steel for making these tubes and so produced tubes for bicycle frames |
| EP2128299A1 (en) | 2008-05-29 | 2009-12-02 | ALSTOM Technology Ltd | Multilayer thermal barrier coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2798805A (en) * | 1954-09-03 | 1957-07-09 | United States Steel Corp | Wrought railroad wheels made of alloy steels |
| GB1056971A (en) * | 1963-01-09 | 1967-02-01 | Trafikaktiebolaget Graengesber | Heat treatment of steels micro-alloyed with nb/ta and/or v |
| US4008103A (en) * | 1970-05-20 | 1977-02-15 | Sumitomo Metal Industries, Ltd. | Process for the manufacture of strong tough steel plates |
-
1984
- 1984-10-12 FR FR8415665A patent/FR2571741B1/en not_active Expired
-
1985
- 1985-10-02 AT AT85401923T patent/ATE36175T1/en not_active IP Right Cessation
- 1985-10-02 DE DE8585401923T patent/DE3564134D1/en not_active Expired
- 1985-10-02 EP EP85401923A patent/EP0178222B1/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2798805A (en) * | 1954-09-03 | 1957-07-09 | United States Steel Corp | Wrought railroad wheels made of alloy steels |
| GB1056971A (en) * | 1963-01-09 | 1967-02-01 | Trafikaktiebolaget Graengesber | Heat treatment of steels micro-alloyed with nb/ta and/or v |
| US4008103A (en) * | 1970-05-20 | 1977-02-15 | Sumitomo Metal Industries, Ltd. | Process for the manufacture of strong tough steel plates |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0526330A1 (en) * | 1991-07-30 | 1993-02-03 | Ascometal | Process for making thinwalled tubes, steel for making these tubes and so produced tubes for bicycle frames |
| FR2679924A1 (en) * | 1991-07-30 | 1993-02-05 | Ascometal Sa | PROCESS FOR MANUFACTURING A THIN-WALL STEEL TUBE, STEEL FOR PRODUCING THE TUBE AND TUBE FOR A CYCLE FRAME OBTAINED |
| EP2128299A1 (en) | 2008-05-29 | 2009-12-02 | ALSTOM Technology Ltd | Multilayer thermal barrier coating |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0178222B1 (en) | 1988-08-03 |
| DE3564134D1 (en) | 1988-09-08 |
| ATE36175T1 (en) | 1988-08-15 |
| FR2571741B1 (en) | 1987-01-23 |
| FR2571741A1 (en) | 1986-04-18 |
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