WO2004009856A1 - オイルテンパー線の製造方法 - Google Patents
オイルテンパー線の製造方法 Download PDFInfo
- Publication number
- WO2004009856A1 WO2004009856A1 PCT/JP2003/006546 JP0306546W WO2004009856A1 WO 2004009856 A1 WO2004009856 A1 WO 2004009856A1 JP 0306546 W JP0306546 W JP 0306546W WO 2004009856 A1 WO2004009856 A1 WO 2004009856A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire
- oil
- annealing
- tempered
- producing
- Prior art date
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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/58—Oils
Definitions
- the present invention relates to a method for manufacturing an oil-tempered wire used for a coil spring such as a valve spring used in an internal combustion engine for an automobile or a torsion spring of a clutch mechanism.
- a wire with controlled non-metallic inclusions is subjected to constant temperature transformation heat treatment, a lubricating film is applied after pickling, the skin is peeled off, and a constant temperature transformation heat treatment is performed again. It is known that a lubricating film is formed by pickling and then subjected to oil tempering after wire drawing. At this time, the isothermal transformation heat treatment of the wire is often omitted because the workability of the wire is improved.
- the conventional method of manufacturing an oil-tempered wire in which the skin is stripped and then subjected to a constant-temperature transformation heat treatment is as follows: (a) Since the wire is heated above the transformation point, decarbonization may occur. (B) The constant temperature transformation heat treatment requires traveling treatment on strands, which causes damage during traveling treatment and handling. (C) In the isothermal transformation heat treatment, it is necessary to remove the oxide scale film generated during the heat treatment and lubricate the film after pickling for wire drawing. (D) The unevenness of the lubricating film makes the adhesion of the oxide scale film in the oil tempering process after wire drawing non-uniform, which is detrimental to coil spring forming (coiling). Disclosure of the invention
- An object of the present invention is to provide a method for manufacturing an oil-tempered wire that can improve quality and reduce costs while simplifying the steps after peeling in view of the above problems.
- Another object of the present invention is a method of manufacturing an oil-tempered wire, which does not cause decarburization of the wire, does not have any scratches or uneven scale on the surface layer after wire drawing and oil-tempering, and facilitates the formation of a coil spring. Is to provide.
- a method for producing an oil-tempered wire comprises: applying a constant-temperature transformation heat treatment to a wire in which nonmetallic inclusions are controlled; applying a lubricating film after pickling; It is characterized in that a work hardened layer generated in a surface layer at the time of peeling is softened by annealing, drawn, and then subjected to an oil tempering treatment.
- the present inventor has found that, as a method for manufacturing an oil-tempered wire used for a coil spring, annealing after stripping a wire rod with controlled nonmetallic inclusions is effective for subsequent drawing.
- the method for manufacturing an oil-tempered wire for a coil spring according to the present invention is characterized in that the work hardened layer generated on the surface of the wire during peeling of the wire is rendered harmless by softening by annealing, and after drawing, The oil tempering process is performed.
- the annealing temperature of the wire is 500-65 ° C. Area.
- the atmosphere during annealing is preferably nitrogen or a mixed gas of nitrogen and oxygen, and it is particularly preferable to control the amount of oxygen.
- the oxide scale film generated during annealing of the wire is controlled to be extremely thin and uniform. This makes it possible to omit the lubrication coating treatment after the pickling for the wire drawing.
- the coating of the oxide scale by annealing may be descaled by shot blasting or the like.
- the oxide scale film uniform by annealing the wire, the oxide scale film (thickness) after the subsequent oil tempering process becomes uniform, and the lubricity during the coil spring forming process (coiling) is improved. Can be kept.
- FIG. 1 is a photograph showing surface cracks of a single wire by the method of manufacturing an oil-tempered wire according to the present invention
- FIG. 2 is a diagram showing a solid solution state of the single wire by the method of manufacturing the oil-tempered wire.
- Fig. 3 is a schematic diagram showing the evaluation criteria in the coil wound state of the wire rod according to the method for producing the oil-tempered wire
- Fig. 4 is a photograph showing the decarburized state of the comparative wire rod.
- the method for producing an oil-tempered wire according to the present invention is characterized in that the wire is peeled, the work-hardened layer generated at that time is softened by annealing, thereby rendering it harmless, drawing, and then oil-tempering. I do.
- the oil-tempered wire is 0.57% carbon (% means weight% unless otherwise specified), silicon 1.45%, manganese 0.69%, and phosphorus 0.014%. , Sulfur 0.004%, Chromium 0.67%, and the balance of iron, the inclusions of alloy steel consisting of controlled wires A to H and comparative material J were prepared, and each wire was subjected to isothermal transformation heat treatment, and acid After washing, a lubricating coating was applied and the surface was peeled. The stripping amount of the wire is 0.3 mm in diameter (0.15 mm in thickness). Next, the wire was annealed by batch.
- the annealing temperature of the wire was changed from 480 to 700 ° C, and the drawability of the wires A to H and the comparative material J at each annealing temperature was confirmed.
- the state of the oxide scale coating after annealing the wire is All were extremely thin and uniform. No decarburization was observed in the wires A to H during annealing, but as shown in Fig. 4, decarburization was observed in the comparative material J.
- Wire A At an annealing temperature of 450 ° C, wire breakage occurred during wire drawing, making it impractical.
- Wire B At an annealing temperature of 480 ° C, wire drawing was achieved with a reduction in area of 80% or more, but as shown in Fig. 1, cracks in the form of cracks perpendicular to the fine line axis were found on the surface of the wire. Occurred.
- Wire rods C to F At an annealing temperature of 500 to 65 ° C, no crack-like cracks perpendicular to the fine wire axis were observed, and no spheroidal cementite was observed, and wire drawing was performed. Cementite was sufficiently solid-dissolved by the subsequent austenization heating, and appropriate strength was obtained. No unevenness was observed in the appearance of the oxide scale film after the oil tempering treatment.
- Wire G Cementite spheroidization is progressing during annealing at a temperature of 700 ° C., and austenitization heating after drawing wire causes insufficient solid solution of the spheroidized cementite. No adequate strength was obtained.
- Comparative material H The appearance of the oxide scale coating after oil tempering showed unevenness.
- Table 1 summarizes the evaluation status of each of the wires A to H and the comparative material J described above. Annealing temperature The appropriate temperature is 500 to 650 ° C for wires C to F.
- Example 1 The components differing from those of Example 1 are 0.65% of carbon, 1.53% of silicon, 0.69% of manganese, 0.07% of phosphorus, 0.008% of sulfur, and 0.6% of chromium.
- a wire rod with controlled inclusions of alloy steel consisting of 8% and the balance of iron is subjected to isothermal transformation heat treatment, a lubricating coating is applied after pickling, and the surface is 0.3 mm in diameter (0.15 mm in thickness) Was peeled.
- the wire was annealed by batch.
- the annealing temperature was 5 ° CTC.
- the wire was drawn to an appropriate wire diameter and then subjected to an oil tempering process. At this time, no abnormalities such as abnormalities due to wire drawing, insufficient strength in oil tempering, and uneven scale did not occur.
- the oil-tempered wires used as high fatigue strength materials include carbon 0,64%, silicon 1.43%, manganese 0.71%, phosphorus 0.006%, and sulfur 0.005%. , 1.48% of chromium, 0.47% of molybdenum, 0.19% of vanadium, and a wire with controlled inclusion of alloy steel consisting of the balance iron
- the surface was peeled with a diameter of 0.3 mm (thickness 0.15 mm). Next, the temperature is changed to 60 Annealing was performed at o ° c. Next, after the wire rod was subjected to wire drawing, an oil tempering treatment was performed.
- the present invention is directed to a method for manufacturing an oil-tempered wire used for a valve spring of an internal combustion engine, a coil spring of a clutch mechanism, etc. This is useful in that the spring can be easily formed.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03730632.1A EP1524323B1 (en) | 2002-07-22 | 2003-05-26 | Process for producing oil tempered wire |
US10/803,379 US20040244883A1 (en) | 2002-07-22 | 2004-03-18 | Method for producing oil temper wires |
HK05101983A HK1069414A1 (en) | 2002-07-22 | 2005-03-08 | Process for producing oil tempered wire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-211954 | 2002-07-22 | ||
JP2002211954A JP3555892B2 (ja) | 2002-07-22 | 2002-07-22 | オイルテンパー線の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004009856A1 true WO2004009856A1 (ja) | 2004-01-29 |
Family
ID=30767794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006546 WO2004009856A1 (ja) | 2002-07-22 | 2003-05-26 | オイルテンパー線の製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040244883A1 (ja) |
EP (1) | EP1524323B1 (ja) |
JP (1) | JP3555892B2 (ja) |
CN (1) | CN1286992C (ja) |
HK (1) | HK1069414A1 (ja) |
WO (1) | WO2004009856A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110129528A (zh) * | 2019-05-15 | 2019-08-16 | 安徽环新集团有限公司 | 用于活塞环的线材退火预处理生产线及方法 |
CN114277231A (zh) * | 2021-11-19 | 2022-04-05 | 铃木加普腾钢丝(苏州)有限公司 | 电动尾门油淬火钢丝在线去氢工艺 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105296717A (zh) * | 2015-11-04 | 2016-02-03 | 无锡翱天钢丝制品有限公司 | 油淬火高碳弹簧废弃钢丝的再循环利用工艺 |
CN106011432A (zh) * | 2016-07-05 | 2016-10-12 | 苏州市虎丘区浒墅关弹簧厂 | 一种轴承用弹簧的热处理工艺 |
DE112020006562B4 (de) | 2020-06-15 | 2024-10-10 | Sumitomo Electric Industries, Ltd. | Federstahldraht |
WO2021255848A1 (ja) | 2020-06-17 | 2021-12-23 | 住友電気工業株式会社 | ばね用鋼線 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6249330B2 (ja) * | 1983-02-19 | 1987-10-19 | Kobe Steel Ltd | |
JPS6372832A (ja) | 1986-09-16 | 1988-04-02 | Shinko Kosen Kogyo Kk | 成形性の良い酸化皮膜を有するオイルテンパ−線の製造方法 |
JP3011435U (ja) * | 1994-11-21 | 1995-05-30 | 鈴木金属工業株式会社 | 自己封止型金属線挿入ノズル |
EP0656427A1 (en) | 1993-11-18 | 1995-06-07 | Sumitomo Electric Industries, Ltd. | Oil-tempered wire and process for producing the same |
EP1013780A1 (en) | 1998-12-21 | 2000-06-28 | Kabushiki Kaisha Kobe Seiko Sho | Spring steel superior in workability |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1815505A (en) * | 1929-11-15 | 1931-07-21 | Oscar J Wilbor | Bright annealing of metals |
GB1400872A (en) * | 1972-11-15 | 1975-07-16 | Bridon Ltd | Production of low alloy steel wire |
US5491036A (en) * | 1992-03-27 | 1996-02-13 | The Louis Berkman Company | Coated strip |
US6224686B1 (en) * | 1998-02-27 | 2001-05-01 | Chuo Hatsujo Kabushiki Kaisha | High-strength valve spring and it's manufacturing method |
JP3595901B2 (ja) * | 1998-10-01 | 2004-12-02 | 鈴木金属工業株式会社 | 高強度ばね用鋼線およびその製造方法 |
-
2002
- 2002-07-22 JP JP2002211954A patent/JP3555892B2/ja not_active Expired - Fee Related
-
2003
- 2003-05-26 WO PCT/JP2003/006546 patent/WO2004009856A1/ja active Application Filing
- 2003-05-26 EP EP03730632.1A patent/EP1524323B1/en not_active Expired - Lifetime
- 2003-05-26 CN CN03801114.XA patent/CN1286992C/zh not_active Expired - Fee Related
-
2004
- 2004-03-18 US US10/803,379 patent/US20040244883A1/en not_active Abandoned
-
2005
- 2005-03-08 HK HK05101983A patent/HK1069414A1/xx not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6249330B2 (ja) * | 1983-02-19 | 1987-10-19 | Kobe Steel Ltd | |
JPS6372832A (ja) | 1986-09-16 | 1988-04-02 | Shinko Kosen Kogyo Kk | 成形性の良い酸化皮膜を有するオイルテンパ−線の製造方法 |
EP0656427A1 (en) | 1993-11-18 | 1995-06-07 | Sumitomo Electric Industries, Ltd. | Oil-tempered wire and process for producing the same |
JP3011435U (ja) * | 1994-11-21 | 1995-05-30 | 鈴木金属工業株式会社 | 自己封止型金属線挿入ノズル |
EP1013780A1 (en) | 1998-12-21 | 2000-06-28 | Kabushiki Kaisha Kobe Seiko Sho | Spring steel superior in workability |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110129528A (zh) * | 2019-05-15 | 2019-08-16 | 安徽环新集团有限公司 | 用于活塞环的线材退火预处理生产线及方法 |
CN114277231A (zh) * | 2021-11-19 | 2022-04-05 | 铃木加普腾钢丝(苏州)有限公司 | 电动尾门油淬火钢丝在线去氢工艺 |
CN114277231B (zh) * | 2021-11-19 | 2023-12-05 | 铃木加普腾钢丝(苏州)有限公司 | 电动尾门油淬火钢丝在线去氢工艺 |
Also Published As
Publication number | Publication date |
---|---|
HK1069414A1 (en) | 2005-05-20 |
EP1524323A4 (en) | 2006-02-01 |
JP3555892B2 (ja) | 2004-08-18 |
JP2004052048A (ja) | 2004-02-19 |
EP1524323A1 (en) | 2005-04-20 |
CN1556866A (zh) | 2004-12-22 |
EP1524323B1 (en) | 2013-06-26 |
CN1286992C (zh) | 2006-11-29 |
US20040244883A1 (en) | 2004-12-09 |
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