WO2017191792A1 - Fil d'acier pour ressort ayant des propriétés exceptionnelles d'enroulement de ressort, et son procédé de fabrication - Google Patents

Fil d'acier pour ressort ayant des propriétés exceptionnelles d'enroulement de ressort, et son procédé de fabrication Download PDF

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Publication number
WO2017191792A1
WO2017191792A1 PCT/JP2017/016537 JP2017016537W WO2017191792A1 WO 2017191792 A1 WO2017191792 A1 WO 2017191792A1 JP 2017016537 W JP2017016537 W JP 2017016537W WO 2017191792 A1 WO2017191792 A1 WO 2017191792A1
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Prior art keywords
less
steel wire
spring
scale
wire
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PCT/JP2017/016537
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English (en)
Japanese (ja)
Inventor
昌平 中久保
実佳子 武田
智一 増田
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Kobe Steel Ltd
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Kobe Steel Ltd
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    • 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
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/06—Wound springs with turns lying in cylindrical surfaces
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Definitions

  • This invention relates to the steel wire for springs which is excellent in spring winding property, and its manufacturing method.
  • the present invention relates to a steel wire mainly used for valve springs, suspension springs and the like.
  • Valve springs used in internal combustion engines such as automobile engines and fuel injection devices, suspension springs used as automobile parts, and the like are manufactured by spring-rolling spring steel wires.
  • Spring steel wire is generally manufactured as follows. First, a steel piece (for example, billet) is heated in a heating furnace in a temperature range of about 900 to 1200 ° C., and the primary scale generated at this time is removed with a high-pressure water descaler. The obtained steel slab is subjected to rough rolling and finish rolling by hot, processed into a predetermined wire diameter by a winding machine, and then bundled into a coil shape to form a rolled wire.
  • the obtained rolled wire rod is subjected to tempering after being cut and drawn to become a steel wire.
  • This tempering process includes three steps of a heating step (austenitizing step), quenching, and tempering.
  • a heating step austenitizing step
  • quenching quenching
  • tempering methods such as oil quenching, induction quenching, and water quenching are adopted.
  • the steel wire is then processed into a spring shape, but a lubricating film may be formed on the surface of the steel wire during the spring winding.
  • Patent Document 1 various techniques for improving the spring winding property by increasing the ratio of Fe 3 O 4 (magnetite) in the scale have been proposed.
  • Patent Document 1 it is an oil tempered wire having an oxide film on the surface of a steel wire, and at least a part of the oxide film includes an inner layer formed on the steel wire, and an outer layer laminated on the inner layer.
  • the inner layer is thinner than the outer layer, the proportion of magnetite in the inner layer is 80% by volume or more, and the proportion of magnetite in the outer layer is 50% by volume or more,
  • An oil temper wire for a spring is disclosed.
  • Patent Document 1 the techniques of the above-mentioned Patent Document 1 and the like that have been proposed so far have a negative effect of scale control by Si oxide and Cr oxide generated in the heating process of tempering of a steel wire containing Si and Cr as described later. This was not considered, and sufficient spring winding property could not be obtained.
  • the present situation is that a steel wire containing Si or Cr, which has excellent adhesion between the scale and the surface of the steel wire, and thus has a good spring winding property is required.
  • the chemical composition of steel constituting the steel wire is, by mass, C: 0.1 to 1.5%, Cr: 0.01 to 3%, Si : 1.0 to 2.5%, and Mn: 0.01 to 2%, and the balance is made of iron and inevitable impurities, and the contents of P and S contained in the inevitable impurities are 0 respectively.
  • the present invention has been made paying attention to the above-mentioned problems.
  • the purpose of this spring is to increase the adhesion of the scale formed during heating to the tempering process in which the steel wire containing Si or Cr is heated with a gas burner or electric heater, etc. Is to provide steel wire.
  • the scale functions as a lubricating film when spring-wound. For this reason, in the heating process of the temper treatment, it is preferable to promote oxidation and generate a thick scale on the surface of the steel wire.
  • the outward diffusion of Fe from the ground iron is inhibited by the formation of a continuous layer of oxides of Si or Cr immediately below the scale and directly above the ground iron. For this reason, it has been found that the void winding increases in the scale, the adhesion of the scale to the steel wire surface decreases, and the scale peels off, so that the spring winding property is significantly impaired.
  • the present inventors have repeatedly examined the control of the continuous layer of oxides of Si and Cr. If a coating film containing Ca is formed on the surface of the steel wire before the temper treatment, the continuation of oxides of Si and Cr It has been found that the properties are impaired and the generation of voids can be suppressed. This is presumably because Ca is oxidized and reduced with SiO 2 or Cr 2 O 3 to deteriorate the consistency of the crystal structure of the Si oxide layer and reduce the diffusion resistance of Fe. In addition, CaO is soft and has an effect of reducing the load applied to the scale during the spring winding. Therefore, it is considered that the scale is prevented from breaking and contributes to the improvement of the spring winding performance. Then, the present inventors have further conducted research based on such knowledge and have arrived at the present invention.
  • the chemical composition of the steel constituting the steel wire is mass% (hereinafter,% means mass% for the component), and C: 0.1 to 1.5% , Cr: 0.01 to 3%, Si: 1.0 to 2.5%, and Mn: 0.01 to 2%, and the balance is made of iron and inevitable impurities, and is included in the inevitable impurities
  • the P and S contents are suppressed to more than 0% and 0.05% or less, respectively
  • the surface has a scale having a thickness of 1 ⁇ m to 5 ⁇ m, and the constituent element of the scale is Ca 0.5% to 10%, the total of Si and Cr: 5% or less, the total of C, Mn, P, S, Mo, Cu, Ni, Ti, V, Nb, and Zn: 10% or less, and
  • the balance is Fe and O.
  • spring winding property means the ease of spring winding and the degree of finish. Moreover, it is said that it is a pass level in the evaluation test of the spring winding property in the below-mentioned Example that it is excellent in this spring winding property.
  • the steel wire for springs of this embodiment has a scale having a thickness of 1 ⁇ m or more and 5 ⁇ m or less on the surface thereof.
  • the thickness of the scale is set to 1 ⁇ m or more in order to sufficiently obtain the lubrication effect of the scale and achieve excellent spring winding performance.
  • it is 1.5 micrometers or more, More preferably, it is 2 micrometers or more.
  • the upper limit of the thickness of the scale is 5 ⁇ m.
  • it is 4.5 micrometers or less, More preferably, it is 4 micrometers or less.
  • Ca content in a scale needs to be 0.5 mass% or more. Preferably it is 1 mass% or more, More preferably, it is 1.5 mass% or more.
  • the Ca content in the scale becomes excessive, the entire scale becomes brittle and may be easily crushed during spring winding. Therefore, the Ca content needs to be 10% by mass or less. Preferably it is 8 mass% or less, More preferably, it is 6 mass% or less.
  • Total of Si and Cr 5% or less If the total of Si and Cr in the scale exceeds 5% by mass, even if Ca is contained, generation of a continuous layer of Si or Cr oxide cannot be suppressed, and voids are generated. Therefore, a desired spring winding property cannot be obtained.
  • the total of Si and Cr is preferably 4% by mass or less, more preferably 3% by mass or less.
  • the lower limit of the total amount of Si and Cr is not particularly limited, but a small amount of Si and Cr may be 2% by mass or more in total from the viewpoint that there is no generation of scale voids and the effect of improving adhesion. preferable.
  • Total of C, Mn, P, S, Mo, Cu, Ni, Ti, V, Nb and Zn 10% or less
  • the lower limit of the total amount of these elements is not particularly limited, but the smaller the better, the better.
  • the scale in the present embodiment satisfies the above component composition, and the balance is Fe and O.
  • the chemical composition of steel constituting the steel wire of this embodiment will be described.
  • Si 1.0-2.5% by mass
  • Si is an element necessary for ensuring the strength of the spring steel wire. It is also an element useful as a deoxidizer during steelmaking. In order to exhibit these effects, it is necessary to contain 1.0 mass% or more. Preferably it is 1.2 mass% or more, More preferably, it is 1.4 mass% or more. However, if the Si content is excessive, the material is cured and the cold workability is lowered, so it is necessary to make it 2.5% by mass or less. Preferably it is 2.3 mass% or less, More preferably, it is 2 mass% or less.
  • the chemical component composition other than Si in the spring steel wire of the present embodiment is adjusted as follows in order to exhibit basic characteristics (strength, toughness, sag resistance, etc.) as a spring steel wire. Need to be.
  • C 0.1-1.5%) C is an element useful for ensuring the strength of the steel material and the fatigue strength and sag resistance of the spring. If the C content is small, not only the necessary tensile strength cannot be secured, but also the fatigue strength and sag resistance are lowered, so the C content needs to be 0.1% or more. Preferably it is 0.2% or more, More preferably, it is 0.4% or more. On the other hand, when C is excessive, a large amount of coarse cementite precipitates, and the ductility and toughness are deteriorated, which adversely affects spring workability and spring characteristics. Therefore, the C content needs to be 1.5% or less. is there. Preferably it is 1.3% or less, More preferably, it is 1.1% or less.
  • Cr 0.01-3%) Cr is an element useful for improving the strength after rolling and heat treatment. In order to exert such effects, it is necessary to contain Cr by 0.01% or more. Preferably it is 0.05% or more, More preferably, it is 0.10% or more. However, when the Cr content is excessive, the hardenability is excessively improved, so that a supercooled structure such as martensite and bainite is generated, and the ductility is remarkably deteriorated. For these reasons, the Cr content needs to be 3% or less. Preferably it is 2.5% or less, More preferably, it is 2% or less.
  • Mn is an element that contributes to improving the strength and toughness of the spring by increasing the hardenability of the steel material. In order to exhibit such an effect, it is necessary to contain Mn 0.01% or more. Preferably it is 0.05% or more, More preferably, it is 0.10% or more. However, when the amount of Mn is excessive, the hardenability is excessively improved, so that a supercooled structure such as martensite and bainite is generated and the toughness and weldability are deteriorated. Therefore, the amount of Mn needs to be 2% or less. is there. Preferably it is 1.8%, More preferably, it is 1.5% or less.
  • the basic components in the steel wire for springs according to the present invention are as described above, and the balance is iron and inevitable impurities (for example, P, S, etc.), but as the inevitable impurities, the status of raw materials, materials, manufacturing equipment, etc. Incorporation of elements introduced by can be allowed. Of these inevitable impurities, P and S must be suppressed as follows.
  • P is an unavoidable impurity, and its content is preferably as small as possible.
  • the P content needs to be 0.05% or less. Preferably it is 0.03% or less, More preferably, it is 0.01% or less. Although it is desirable that the P content is small, it is difficult to make it less than 0.001% industrially, so the lower limit of the P content is generally 0.001% or more.
  • S is an inevitable impurity and is preferably as small as possible.
  • sulfide inclusion MnS may be formed and segregated during hot working to cause the steel material to become brittle.
  • the S content needs to be 0.05% or less.
  • it is 0.03% or less, More preferably, it is 0.01% or less.
  • the lower limit of the S content is generally 0.001% or more.
  • the spring steel wire of the present invention may further include Mo: more than 0% and 1% or less, Cu: more than 0% and 0.4% or less, Ni: more than 0% and 2% or less, Ti It is also effective to contain one or more selected from the group consisting of: more than 0% and 0.3% or less, V: more than 0% and 1% or less, and Nb: more than 0% and 1% or less. Appropriate ranges and actions when these elements are contained are as follows.
  • Mo over 0%, 1% or less
  • Mo is an element useful for increasing the strength of the steel wire
  • the Mo content is preferably 1% or less. More preferably, it is 0.8% or less, More preferably, it is 0.5% or less.
  • Cu is an element useful for increasing the strength of a steel wire, it is preferably contained in an amount of more than 0%. In particular, in order to exert such effects, it is preferable to contain Cu by 0.001% or more. More preferably, it is 0.005% or more. On the other hand, if the Cu content is excessive, it becomes a liquid phase at a high temperature (1356 K), and enters the austenite grain boundary during deformation in hot rolling to cause surface cracks. It is preferable. More preferably, it is 0.3% or less, More preferably, it is 0.2% or less.
  • Ni is an element useful for increasing the strength of the steel wire, it is preferably contained in an amount of more than 0%. In particular, in order to exert such an effect, Ni is preferably contained in an amount of 0.001% or more. More preferably, it is 0.005% or more. On the other hand, when the Ni content is excessive, it is concentrated unevenly on the surface of the steel wire, and unevenness on the surface of the steel wire is increased to deteriorate the surface properties. More preferably, it is 1.8% or less, More preferably, it is 1.5% or less.
  • Ti more than 0%, 0.3% or less
  • Ti is an element added as a deoxidizer, it is preferably contained in an amount exceeding 0%. In order to exhibit the effect especially, it is preferable to contain Ti 0.001% or more. More preferably, it is 0.005% or more.
  • the Ti content is excessive, the toughness of the steel wire is lowered, so that the content is preferably 0.3% or less. More preferably, it is 0.2% or less, More preferably, it is 0.1% or less.
  • V is an element that contributes to improving the strength of the steel wire by forming carbides and refining the crystal grains, so it is preferably contained in an amount of more than 0%. In particular, in order to exert such an effect, V is preferably contained in an amount of 0.001% or more. More preferably, it is 0.005% or more. On the other hand, if the V content is excessive, it not only causes an increase in cost, but also raises the yield point (yield ratio) and degrades the workability, so it is preferably made 1% or less. More preferably, it is 0.5% or less, More preferably, it is 0.1% or less.
  • Nb over 0%, 1% or less
  • Nb is an element that contributes to improving the strength of the steel wire by forming carbides and refining crystal grains, so it is preferable to contain Nb in an amount of more than 0%. In particular, in order to exert such effects, it is preferable to contain Nb in an amount of 0.001% or more. More preferably, it is 0.005% or more.
  • the Nb content is excessive, it not only causes an increase in cost, but also raises the yield point (yield ratio) and degrades the workability, so it is preferably made 1% or less. More preferably, it is 0.5% or less, More preferably, it is 0.1% or less.
  • a rolled wire to be subjected to tempering is generally manufactured as follows. First, a steel slab (for example, billet) is heated to about 900 to 1200 ° C. in a heating furnace, the generated primary scale is descaled with a high-pressure water descaler, and then subjected to rough rolling and finish rolling, and then a predetermined machine is used by a winding machine. It can be processed into a wire diameter to obtain a rolled wire. Then, the steel wire for springs is obtained by giving a temper process to a rolled wire.
  • a steel slab for example, billet
  • the generated primary scale is descaled with a high-pressure water descaler, and then subjected to rough rolling and finish rolling, and then a predetermined machine is used by a winding machine. It can be processed into a wire diameter to obtain a rolled wire.
  • the steel wire for springs is obtained by giving a temper process to a rolled wire.
  • the spring steel wire of the present embodiment it is preferable to apply a calcium-containing compound solution or resin to the steel wire after hot rolling and wire drawing and before tempering. Thereby, the steel wire which contains Ca in a scale can be obtained.
  • heat processing (heating) temperature is the value measured on the steel material surface.
  • the hot rolling step is not particularly limited, but for example, the rolling can be performed at 700 to 1100 ° C.
  • the surface of the rolled wire material is subjected to a skinning process to obtain a wire material having a further desired diameter (wire diameter).
  • a lubricating film is formed on the surface of the obtained wire, and then cold wire drawing is performed to obtain a steel wire having a desired diameter (wire diameter).
  • the lubricating film formed here include a zinc phosphate film.
  • a solution or resin of a calcium-containing compound is applied to the steel wire.
  • it is preferable to remove the lubricating coating because it may adversely affect the spring winding property, but it is not necessary to completely remove the lubricating coating, and it can be left without being removed.
  • coat for example, solutions or resin, such as a calcium stearate, a calcium carbonate, sodium hydrogencarbonate, are mentioned as a suitable example.
  • a calcium stearate solution is preferably used from the viewpoint of good wettability and easy adhesion to a steel wire.
  • the Ca content in the scale can be controlled by adjusting the temperature and coating amount of the calcium-containing compound solution or resin before the temper treatment, and the wire speed of the steel wire.
  • the thickness of the scale can be controlled by adjusting the coating amount of the calcium-containing compound solution at this time and the subsequent tempering conditions (particularly, the extraction temperature described later).
  • the temperature of the solution is 40 to 100 ° C.
  • the coating amount is 3 to 10 ( ⁇ m)
  • the wire speed of the steel wire is 5 to It can adjust by setting it as 40 m / min.
  • the temper process will be described.
  • the solution is heated and extracted at 750 to 1000 ° C. in an atmosphere where no oxide is generated (for example, an Rx gas atmosphere).
  • the holding time at the heating temperature is preferably 10 seconds to 40 seconds. After that, it is exposed to the atmosphere and quenched and tempered.
  • the atmospheric exposure time is preferably 0.1 seconds or more and 10 seconds or less.
  • quenching is performed for 0.1 seconds to 10 seconds with oil having an oil temperature of 60 to 100 ° C., and tempering is performed at a heating temperature of 300 ° C. or more and 600 ° C. or less and a holding time at the heating temperature.
  • the steel wire for springs of this embodiment is obtained by setting to 10 seconds or more and 120 seconds or less.
  • the steel wire of the present embodiment can be suitably used for a spring steel wire having a diameter of 1 to 10 mm (preferably, a diameter of 2 to 9 mm), for example.
  • the steel wire of the present embodiment thus obtained is then formed into a spring by spring processing.
  • the spring processing a known technique for applying a spring winding can be used without any particular limitation.
  • the steel wire for springs of this embodiment can be used suitably, for example as a valve spring, a bridge spring, etc. which are used for a motor vehicle etc.
  • the chemical components of the steel constituting the steel wire are C: 0.1 to 1.5%, Cr: 0.01 to 3%, Si: 1.0. -2.5% and Mn: 0.01-2%, and the balance consists of iron and inevitable impurities, and the contents of P and S contained in the inevitable impurities are more than 0% and 0%, respectively.
  • the surface has a scale with a thickness of 1 ⁇ m or more and 5 ⁇ m or less, and the constituent elements of the scale are Ca: 0.5% to 10%, the total of Si and Cr: 5% or less, total of C, Mn, P, S, Mo, Cu, Ni, Ti, V, Nb, and Zn: 10% or less, and the remainder is Fe and O Spring steel wire with excellent properties.
  • Such a configuration can provide a steel wire for springs that exhibits excellent spring winding performance by enhancing the adhesion of the scale formed during tempering heating in a steel wire containing Si or Cr.
  • the chemical components are Mo: more than 0% to 1%, Cu: more than 0% to 0.4%, Ni: more than 0% to 2%, Ti: more than 0% It is preferable to contain one or more selected from the group consisting of 0.3% or less, V: more than 0% and 1% or less, and Nb: more than 0% and 1% or less.
  • a spring steel wire having more excellent characteristics such as strength and toughness can be provided.
  • the manufacturing method of the steel wire for springs which concerns on the other situation of this invention apply
  • Billets were prepared by melting steels A to G having the chemical composition shown in Table 1 below.
  • the billet was heated to 1200 ° C. and then hot-rolled to form a rolled wire having a diameter (wire diameter) of 8.5 mm.
  • the surface of the rolled wire is subjected to a skinning process to obtain a wire having a diameter (wire diameter) of 6.0 mm, and then a lubricating film (zinc phosphate film) is formed on the surface, and cold wire drawing is performed.
  • a lubricating film Zinc phosphate film
  • a calcium stearate solution was applied.
  • sample no. In No. 9 the zinc phosphate film was partially left by diluting the hydrochloric acid concentration in the pickling bath. In No. 10, the pickling was not performed and the zinc phosphate film was not removed.
  • the film thickness (unit area) shown in Table 2 can be adjusted by adjusting the temperature of the liquid calcium stearate and the wire speed of the steel wire. Per Ca). Table 2 below shows the temperature of the liquid calcium stearate solution, the wire speed of the steel wire, and the coating amount of the calcium stearate solution in the steel materials of each Example and Comparative Example.
  • the steel wire was heated in Rx gas over about 100 seconds, extracted at various temperatures shown in Table 2, and exposed to the atmosphere for 1-2 seconds. Thereafter, it was immersed in an oil bath at 80 ° C. for 2 seconds and tempered at 400 ° C. for 60 seconds.
  • Table 1 “-” means no addition, and “tr.” Means less than the measurement limit.
  • Sample No. Examples 15 to 16 are examples using steel types F and G having a high Cr content. According to the present invention, it was confirmed that even if a steel type containing a high amount of Cr was used, the spring winding property was excellent.
  • the present invention has wide industrial applicability in the technical field related to spring steel wires and methods for manufacturing the same.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Springs (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

La présente invention concerne un fil d'acier pour un ressort ayant des propriétés exceptionnelles d'enroulement de ressort et un procédé de production du fil d'acier, caractérisé en ce que : les composants chimiques de l'acier constituant le fil d'acier contiennent, en pourcentage en masse, de 0,1 à 1,5 % de C, de 0,01 à 3 % de Cr, de 1,0 à 2,5 % de Si et de 0,01 à 2 % de Mn, le reste étant constitué de fer et des impuretés inévitables ; les quantités contenues de chacun des éléments P et S inclus dans les impuretés inévitables sont limitées à plus de 0 % mais pas plus de 0,05 % ; le fil d'acier présente une couche d'oxyde d'une épaisseur de 1 à 5 µm à sa surface et les éléments constitutifs de la couche d'oxyde comprennent, en pourcentage en masse, de 0,5 à 10 % de Ca, de 5 % ou moins du total de Si et de Cr, et de 10 % ou moins du total de C, Mn, P, S, Mo, Cu, Ni, Ti, V, Nb et Zn, le reste étant constitué de Fe et O.
PCT/JP2017/016537 2016-05-06 2017-04-26 Fil d'acier pour ressort ayant des propriétés exceptionnelles d'enroulement de ressort, et son procédé de fabrication Ceased WO2017191792A1 (fr)

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JP2016093090A JP2017201051A (ja) 2016-05-06 2016-05-06 ばね巻き性に優れるばね用鋼線及びその製造方法

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CN108728739A (zh) * 2018-04-21 2018-11-02 张家港联峰钢铁研究所有限公司 一种非淬回火高碳高强度合金弹簧钢90SiMn及其制备方法
CN110548771A (zh) * 2019-08-14 2019-12-10 江苏弘亚钨钼科技有限公司 一种w型钼丝的制备方法
WO2023013174A1 (fr) * 2021-08-05 2023-02-09 住友電気工業株式会社 Fil d'acier pour ressort
JP7211569B1 (ja) * 2021-08-05 2023-01-24 住友電気工業株式会社 ばね用鋼線

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000065110A (ja) * 1998-08-25 2000-03-03 Sumitomo Electric Ind Ltd ばね用オイルテンパー線
JP2009263704A (ja) * 2008-04-23 2009-11-12 Nippon Steel Corp 伸線加工性と耐疲労特性に優れた鋼線材
JP2014169470A (ja) * 2013-03-01 2014-09-18 Kobe Steel Ltd 伸線性に優れたばね用鋼線材およびその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000065110A (ja) * 1998-08-25 2000-03-03 Sumitomo Electric Ind Ltd ばね用オイルテンパー線
JP2009263704A (ja) * 2008-04-23 2009-11-12 Nippon Steel Corp 伸線加工性と耐疲労特性に優れた鋼線材
JP2014169470A (ja) * 2013-03-01 2014-09-18 Kobe Steel Ltd 伸線性に優れたばね用鋼線材およびその製造方法

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