CN109415788A - Spring steel wire, spring, the method for manufacturing spring steel wire and the method for manufacturing spring - Google Patents
Spring steel wire, spring, the method for manufacturing spring steel wire and the method for manufacturing spring Download PDFInfo
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- CN109415788A CN109415788A CN201780042912.7A CN201780042912A CN109415788A CN 109415788 A CN109415788 A CN 109415788A CN 201780042912 A CN201780042912 A CN 201780042912A CN 109415788 A CN109415788 A CN 109415788A
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/003—Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F35/00—Making springs from wire
-
- 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
- C21D1/06—Surface hardening
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- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- 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
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
-
- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
- Springs (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of spring steel wires, the spring steel wire is formed by steel, the steel contains the chromium of the carbon of 0.5 mass of mass %~0.8 %, the silicon of 1.0 mass of mass %~2.5 %, the manganese of 0.2 mass of mass %~1.0 % and 0.5 mass of mass %~2.5 %, and surplus is iron and inevitable impurity.The steel has tempered martensite structure.Hardness as the surface region from the region within 10 μm of outer surface is taller and bigger than the hardness in the region in addition to the surface region in 0HV and to be no more than 50HV.
Description
Technical field
The present invention relates to spring steel wire, spring, the method for manufacturing spring steel wire and the methods for manufacturing spring.
This application claims the Japanese patent application submitted on July 14th, 2,016 2016-139668 and March 1 in 2017
Japanese patent application 2017-038665 priority that day submits, by reference to being incorporated herein entire contents.
Background technique
The method for a possibility that being broken during simultaneously reducing winding simultaneously as the fatigue strength for improving spring, proposes
A kind of technology, the technology are related to quenching (quenched) and being tempered under conditions of Ratio of decreased area is 5%~25%
(tempered) line is implemented to stretch.Therefore, a possibility that being broken during winding reduction, and pass through heat treatment after winding
Increase the yield stress of spring to obtain the spring with excellent fatigue strength (see, for example, Japanese Unexamined Patent Publication 2012-52218 public affairs
It reports (patent document 1)).
Reference listing
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2012-52218 bulletin
Summary of the invention
Spring steel wire according to the present invention is formed by steel, and the steel contains the carbon of 0.5 mass of mass %~0.8 %, 1.0
The chromium of the silicon of the mass of quality %~2.5 %, the manganese of 0.2 mass of mass %~1.0 % and 0.5 mass of mass %~2.5 %, surplus
For iron and inevitable impurity.Steel has tempered martensite structure.Surface as the region within from outer surface 10 μm
The hardness in region is taller and bigger than the hardness in the region in addition to the surface region in 0HV and no more than 50HV.
The method of manufacture spring steel wire according to a first aspect of the present invention includes the following steps: to prepare wire raw material wire rods, institute
State wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, the silicon of 1.0 mass of mass %~2.5 %, 0.2 mass %~
The chromium of the manganese of 1.0 mass % and 0.5 mass of mass %~2.5 %, surplus are iron and inevitable impurity；To wire raw material wire rods reality
It applies and stretches for the first time；Carburization Treatment is implemented to the wire raw material wire rods by stretching for the first time, so that including the wire raw material wire rods surface
The concentration of carbon concentration of carbon more internal than it in region tall and big in 0 mass % and be no more than 0.05 mass %；And described in process
The wire raw material wire rods of Carburization Treatment implement quenching and tempering.
The method of manufacture spring steel wire according to a second aspect of the present invention includes the following steps: to prepare wire raw material wire rods, institute
State wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, the silicon of 1.0 mass of mass %~2.5 %, 0.2 mass %~
The chromium of the manganese of 1.0 mass % and 0.5 mass of mass %~2.5 %, surplus are iron and inevitable impurity；To wire raw material wire rods reality
It applies and stretches for the first time；Quenching and tempering are implemented to the wire raw material wire rods by stretching for the first time；And to by quenching and returning
The wire raw material wire rods of fire processing are implemented second and are stretched.The Ratio of decreased area that is stretching in for the second time is 1% more than and less than 5%
Under the conditions of implement.
Detailed description of the invention
[Fig. 1] Fig. 1 is the schematic diagram for showing the structure of spring steel wire.
[Fig. 2] Fig. 2 is the schematic diagram for showing spring structure.
[Fig. 3] Fig. 3 is the stream being shown schematically as according to the manufacture spring steel wire of first embodiment and the method for spring
Cheng Tu.
[Fig. 4] Fig. 4 is the schematic diagram for showing the structure of wire raw material wire rods.
[Fig. 5] Fig. 5 is the figure for showing carburization step and quenching and tempering step.
[Fig. 6] Fig. 6 is the schematic sectional view for showing second of stretching step.
[Fig. 7] Fig. 7 is the stream being shown schematically as according to the manufacture spring steel wire of the second embodiment and the method for spring
Cheng Tu.
Specific embodiment
[technical problem]
As described above, need at the same realize improvement fatigue strength and winding during the fracture possibility that reduces.Therefore, originally
The purpose of invention is to provide a kind of fatigue for having during winding and can be realized improvement under conditions of the fracture possibility reduced
Spring steel wire, spring, the method for manufacturing spring steel wire and the method for manufacturing spring of intensity.
[advantageous effect of the invention]
The method of spring steel wire according to the present invention and manufacture spring steel wire can have reduction during winding
Improved fatigue strength is realized under conditions of fracture possibility.
[description of invention embodiment]
Firstly, by the list of embodiment of the present invention is described.According to the spring steel wire of the application by steel shape
At the steel contains the carbon (C) of 0.5 mass of mass %~0.8 %, the silicon (Si) of 1.0 mass of mass %~2.5 %, 0.2 matter
Measure the manganese (Mn) of the mass of %~1.0 % and the chromium (Cr) of 0.5 mass of mass %~2.5 %, surplus is iron and inevitable miscellaneous
Matter.Steel has tempered martensite structure.The hardness ratio of surface region as the region within from outer surface 10 μm is except described
The hardness in the region except surface region is tall and big in 0HV and no more than 50HV.
According to the research that inventor carries out, by only slightly increasing by steel shape in very thin surface region compared with internal
At steel wire hardness, obtain can during winding have reduce fracture possibility under conditions of realize improve fatigue by force
The spring steel wire of degree, wherein the steel, which has, is suitably composed composition and tempered martensite structure.For according to the application's
Composition composition and tempered martensite structure of the steel of spring steel wire with intensity needed for capable of ensuring spring.It will be from outer surface
The hardness for playing the very thin surface region (surface region) within 10 μm is set as the region (interior zone) except specific surface region
Hardness it is tall and big in 0HV and be no more than 50HV.Because in this way only in surface region hardness increase 50HV hereinafter,
Can be had during winding according to the spring steel wire of the application and realize the tired of improvement under conditions of the fracture possibility reduced
Labor intensity.
Herein, herein by the composition for the steel that will form spring steel wire composition limitation within the above range the reason of into
Row explanation.
Carbon: 0.5 mass of mass %~0.8 %
Carbon is a kind of element for greatly influencing to have the intensity of the steel of tempered martensite structure.It is used as spring to obtain
With the sufficient intensity of steel wire, carbon content is necessary for 0.5 mass % or more.On the other hand, high-carbon content will lead to toughness reduction, from
And the processability during reducing winding and stretching.In order to ensure enough processabilities, carbon content is necessary for 0.8 mass % or less.
In order to further increase intensity, preferably carbon content is 0.6 mass % or more.In order to improve toughness and help to process, preferred carbon
Content is 0.7 mass % or less.
Silicon: 1.0 mass of mass %~2.5 %
Silicon has the property (softening resistance) of softening when reducing heating.In order to reduce in the laggard of wind spring steel wire
Softening during capable strain relief heat treatment, silicone content are necessary for 1.0 mass % or more.On the other hand, the silicon of excessive addition
The toughness of spring steel wire can be reduced.In order to ensure enough toughness, silicone content is necessary for 2.5 mass % or less.In order into one
Step improves repellence when heating to softening, and silicone content is preferably 1.3 mass % or more.It is enough tough in order to more reliably ensure
Property, preferably silicone content is 2.3 mass % or less.
Manganese: 0.2 mass of mass %~1.0 %
Manganese is the element in steel refining as deoxidier addition.In order to make manganese play the role of deoxidier, manganese content must
It must be 0.2 mass % or more.On the other hand, martensitic structure is formed when the manganese of excessive addition will lead to cooling after heating.Unintentionally
The martensitic structure of formation can reduce the processability during the technique such as stretched.Therefore, manganese content be necessary for 1.0 mass % with
Under.In order to make manganese more reliably play the role of deoxidier, preferably manganese content is 0.3 mass % or more.In order to more reliably subtract
Few martensitic structure is not intended to be formed, and preferably manganese content is 0.85 mass % or less.
Chromium: 0.5 mass of mass %~2.5 %
Chromium facilitates softening when heating after reducing quenching and tempering.In order to reliably generate this effect, chromium content
It is necessary for 0.5 mass % or more.On the other hand, excessive addition chromium will lead to and form martensitic structure when cooling down after the heating.Nothing
Meaning formed martensitic structure can reduce the technique such as stretched during processability.Therefore, chromium content is necessary for 2.5 mass %
Below.In order to more reliably reduce the softening when heating after quenching and tempering, preferably chromium content is 0.7 mass % or more.
In order to more reliably reduce the formation that is not intended to of martensitic structure, preferably chromium content is 1.5 mass % or less.
Inevitable impurity
During manufacturing spring steel wire, the impurity of such as phosphorus (P), sulphur (S) and copper (Cu) is contingently incorporated into shape
At in the steel of spring steel wire.The presence of excessive p and s can cause cyrystal boundary segregation and form field trash, to reduce steel
Performance.Therefore, the content of p and s is respectively preferably 0.035 mass % hereinafter, more preferable 0.025 mass % or less.Copper can drop
The hot-workability of low steel.Therefore, copper content is preferably 0.2 mass % or less.Total inevitable impurity content is preferably 1 matter
Measure % or less.
Spring steel wire can have 15mm diameter below.It is suitable as having according to the spring steel wire of the application this
The spring steel wire of linear diameter.If spring steel wire has the non-circular cross sections being transversely to the machine direction, used herein
" diameter " refers to the diameter of a circle around cross section.
The concentration of carbon of the surface region of spring steel wire can be tall and big in 0 matter with the concentration of carbon in the region except specific surface region
It measures % and is no more than 0.05 mass %.If the carbon content of surface region is higher than the carbon in internal (region in addition to surface region)
Content then can easily make the hardness of surface region be higher than internal hardness.
The ratio of { 110 } texture can be than the ratio of { 110 } texture in central area in the surface region of spring steel wire
Example is high by 5%~35%, and the central area is from the center of gravity perpendicular to the cross section of spring steel wire longitudinal direction within 10 μm
Region.Which increase the elastic limits of shear stress.As a result, it is possible to improve the fatigue strength of the spring made of spring steel wire
With resistance against plastic deformation (of resistance to へ り).
If the ratio of { 110 } texture is higher by 5% or more than the ratio of { 110 } texture in central area in surface region,
Said effect is clear.On the other hand, if the ratio of { 110 } texture is than { 110 } texture in central area in surface region
Ratio height be more than 35%, then spring steel wire can show reduced processability during winding.Come from the viewpoint of processability
It sees, the ratio of { 110 } texture is higher by 30% or less than the ratio of { 110 } texture in central area preferably in surface region.More preferably
The ratio of { 110 } texture is higher by 15% or less than the ratio of { 110 } texture in central area in surface region.In central area
{ 110 } ratio of texture is such as 3% or less.
The ratio of { 110 } texture in surface region and central area can for example be determined as follows.Spring is used first
Steel wire is cut, and carries out mechanical lapping to cross section.Then with the ion beam of such as ar-ion beam to the cross of mechanical lapping
Section carries out ion grinding, to remove any surface region of mechanical lapping damage, to obtain observation surface.Then to obtaining
Observation surface carry out crystal orientation measurement, for example to measure surface region and center by electron backscatter diffraction (EBSD)
The ratio of { 110 } texture in region.
Spring steel wire can have 3 μm of circularity below in the cross section being transversely to the machine direction.This is stabilized is used by spring
The performance of spring made of steel wire.
Spring steel wire can have every meter of 1% variation in diameter below in the cross section being transversely to the machine direction.This stablizes
Made of the spring steel wire performance of spring.
The steel for forming spring steel wire can vanadium also containing 0.05 mass of mass %~0.5 %.Vanadium in steel by forming
Tiny carbide and softening when helping to reduce heating.It, can be with 0.05 mass % in order to reliably generate this effect
Above amount adds vanadium.On the other hand, the vanadium of excessive addition can reduce the toughness of steel.In order to ensure enough toughness, it is preferable that
Vanadium is added with 0.5 mass % or less, preferably with 0.25 mass % amount below.
It is formed according to the spring of the application by aforementioned spring steel wire.Because the spring according to the application is by according to the application
Spring steel wire formed, so be capable of providing during winding have reduced fracture possibility under conditions of show it is higher
The spring of breaking strength.
It is the surface below 300ppm that spring, which can have nitrogen concentration,.According to the spring of the application without such as nitrogen treatment
Processing under conditions of show enough fatigue strength, the nitrogen concentration of spring surface is increased to above such model by the processing
It encloses.
Included the following steps: to prepare wire raw material wire rods, institute according to the method for the manufacture spring steel wire of the application first aspect
State wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, the silicon of 1.0 mass of mass %~2.5 %, 0.2 mass %~
The chromium of the manganese of 1.0 mass % and 0.5 mass of mass %~2.5 %, surplus are iron and inevitable impurity；To wire raw material wire rods reality
It applies and stretches for the first time；Carburization Treatment is implemented to the wire raw material wire rods by stretching for the first time, so that including the wire raw material wire rods surface
The concentration of carbon concentration of carbon more internal than it in region tall and big in 0 mass % and be no more than 0.05 mass %；And described in process
The wire raw material wire rods of Carburization Treatment implement quenching and tempering.
In the method according to the manufacture spring steel wire of the application first aspect, to the above-mentioned composition that is suitably constructed
Wire raw material wire rods implement Carburization Treatment, slightly to increase the concentration of carbon in the region including the surface, then implement quenching and tempering
Processing.This to be formed and the hardness of spring steel wire that the steel of tempered martensite structure is formed only exists by having to be suitably composed
Slightly increase in very thin surface region than inside.As a result, it is possible to the spring steel wire according to the application is easily manufactured, so that
The hardness of very thin surface region (surface region) within from outer surface 10 μm is set as the region except specific surface region
The hardness of (interior zone) is tall and big in 0HV and no more than 50HV.
In the method according to the manufacture spring steel wire of first aspect, the wire raw material wire rods by stretching for the first time are implemented
The step of Carburization Treatment may include forming by way of being 0.5 mass of mass %~1.5 % with carbon potential (CP) value to it
Wire raw material wire rods are heated to implement Carburization Treatment in the atmosphere controlled.If led in the atmosphere with controlled CP value
Gas carburizing is crossed to implement Carburization Treatment, then the concentration of carbon of surface region becomes stable.As a result, the firmness change of surface region subtracts
It is small, and spring steel wire can be easily manufactured so that the hardness of surface region it is taller and bigger than the hardness of interior zone in 0HV and
No more than 50HV.
Method according to the manufacture spring steel wire of first aspect can also include to the original by quenching and tempering
Stockline material implements the step of second of stretching.This improves the dimensional accuracy of spring steel wire.
In the method according to the manufacture spring steel wire of first aspect, second of stretching can be in Ratio of decreased area
1% more than and less than 5% in the case where implement.If Ratio of decreased area is not less than 5%, it is difficult to realize only on very thin surface
The increase of hardness in region, because steel wire inner hardness after the stretch also will increase.If Ratio of decreased area is set as
The increase for only realizing hardness in superficial layer less than 5%, then can more easily manufacture the spring steel wire according to the application.
If Ratio of decreased area is 1% or more, the increasing of hardness can be more reliably realized in very thin surface region after the stretch
Add.
Included the following steps: to prepare wire raw material wire rods, institute according to the method for the manufacture spring steel wire of the application second aspect
State wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, the silicon of 1.0 mass of mass %~2.5 %, 0.2 mass %~
The chromium of the manganese of 1.0 mass % and 0.5 mass of mass %~2.5 %, surplus are iron and inevitable impurity；To wire raw material wire rods reality
It applies and stretches for the first time；Quenching and tempering are implemented to the wire raw material wire rods by stretching for the first time；And to by quenching and returning
The wire raw material wire rods of fire processing are implemented second and are stretched.The Ratio of decreased area that is stretching in for the second time is 1% more than and less than 5%
Under the conditions of implement.
In the method according to the manufacture spring steel wire of the application second aspect, to the above-mentioned composition that is suitably constructed
Wire raw material wire rods implement quenching and tempering, are then 1% lower more than and less than 5% to implement second of drawing in Ratio of decreased area
It stretches.This to be formed and the hardness of spring steel wire that the steel of tempered martensite structure is formed is only very thin by having to be suitably constructed
Surface region in than inside slightly increase.As a result, it is possible to the spring steel wire according to the application be easily manufactured, so that from outer
The hardness that the very thin surface region (surface region) within 10 μm is played on surface is set as the region (inner area except specific surface region
Domain) hardness it is tall and big in 0HV and be no more than 50HV.
In the method for manufacture spring steel wire, wire raw material wire rods can be heated to 25 DEG C~450 DEG C of temperature range
While implement second and stretch.This forms KESHI gas mass (Cottrell atmosphere) in steel, to increase bullet
The intensity of spring steel wire.It can implement second while wire raw material wire rods to be heated to 150 DEG C~450 DEG C of temperature range to draw
It stretches.
In the method for manufacture spring steel wire, second stretch can under 0.1 °~7 ° of approach angle by mold come
Implement.This makes the increase that hardness is only easily realized in superficial layer.
In the method for manufacture spring steel wire, it is below wire raw material wire rods can be stretched to by 15mm by first time stretching
Diameter.If so that by the mode that wire raw material wire rods are stretched to 15mm diameter below implement for the first time stretch setting, can
The finer wire for spring is enough easily manufactured.
Included the following steps: according to the method for the manufacture spring of the application through the manufacture spring steel wire according to the application
Method spring steel wire is provided；And spring steel wire is implemented to wind.
Because by the spring steel wire manufactured by the method for manufacturing spring steel wire according to the application according to this Shen
The method of manufacture spring please implements winding, manufactures under conditions of reduced fracture possibility so can have during winding
Show the spring of improved fatigue strength.
The method of manufacture spring can also include implementing shot-peening (shot peening) processing to the spring steel wire of winding
The step of.It is the surface below 300ppm that spring steel wire for implementing bead, which can have nitrogen concentration,.If in root
Implement bead under conditions of without the processing of such as nitrogen treatment according in the method for the manufacture spring of the application, then can
Manufacture shows the spring of enough fatigue strength, and the nitrogen concentration of spring surface is increased to above such range by the processing.
[details of invention embodiment]
Then, the embodiment of the method for manufacture steel wire according to the present invention is described below with reference to the accompanying drawings.?
In following attached drawing, identical or corresponding part is indicated by the same numbers, and its description is not repeated.
(first embodiment)
With reference to Fig. 1, the spring steel wire 1 according to the embodiment is with the circular cross section 10 and circle being transversely to the machine direction
The steel wire of cylindrical outer surface 11.Spring steel wire 1 has the diameter of such as 15mm or less, preferably 2mm~10mm.
Spring steel wire 1 is formed by steel, and the steel contains the carbon of 0.5 mass of mass %~0.8 %, 1.0 mass %~2.5
The chromium of the silicon of quality %, the manganese of 0.2 mass of mass %~1.0 % and 0.5 mass of mass %~2.5 %, surplus are iron and can not
The impurity avoided.Steel has tempered martensite structure.Surface region 12 as the region within from outer surface 11 10 μm
Hardness is taller and bigger than the hardness of the interior zone 13 as the region except the surface region in 0HV and no more than 50HV.Surface
The concentration of carbon in region 12 is taller and bigger than the concentration of carbon of interior zone 13 in 0 mass % and no more than 0.05 mass %.Surface region 12
It is carburized layer.
Steel for spring steel wire 1 has above-mentioned composition composition and tempered martensite structure, and the composition composition can
Intensity needed for ensuring spring.By the hardness as the very thin surface region (surface region 12) within from outer surface 11 10 μm
It is set as taller and bigger than the hardness of interior zone 13 in 0HV and no more than 50HV.Because in this way only in surface region 12
Hardness increase 50HV hereinafter, so spring steel wire 1 can during winding have reduceds fracture possibility under conditions of reality
The fatigue strength now improved.The hardness of surface region 12 is preferably 5HV~25HV higher than the hardness of interior zone 13, and preferably 5HV~
15HV.The concentration of carbon of surface region 12 preferably 0.01 mass %~0.03 mass % higher than the concentration of carbon of interior zone 13, it is more excellent
Select 0.01 mass of mass %~0.02 %.
The ratio of { 110 } texture is preferably than { 110 } texture in central area 14 in the surface region 12 of spring steel wire 1
Ratio it is high by 5%~35%, the central area 14 is 10 μm from the center of gravity perpendicular to the longitudinal cross section of spring steel wire 1
Within region.Which increase the elastic limits of shear stress.As a result, it is possible to improve the spring made of spring steel wire 1
Fatigue strength and resistance to settling.The ratio of { 110 } texture in the central area 14 is such as 3% or less.
Spring steel wire 1 preferably has 3 μm of circularity below in the cross section 10 being transversely to the machine direction.This is stabilized by bullet
The performance of spring spring made of steel wire 1.
Spring steel wire 1 can have every meter of 1% variation in diameter below in the cross section 10 being transversely to the machine direction.This is steady
The performance of the spring made of spring steel wire 1 is determined.The variation of diameter refers to every meter of maximum and minimum diameter in the longitudinal direction
Between difference.
The steel for forming spring steel wire 1 can also contain the vanadium of 0.05 mass of mass %~0.5 %.Which reduce when heating
Softening.
The example that can be used to form the steel of spring steel wire 1 includes according to the SWOSC-B of JIS G3560 and according to JIS
The SWOCV-V and SWOSC-V of G3561.
With reference to Fig. 2, formed according to the spring 2 of the embodiment by spring steel wire 1.Because spring 2 is by spring steel wire 1
It is formed, so spring 2 can have during winding shows improved fatigue strength under conditions of the fracture possibility reduced.
The nitrogen concentration on the surface (outer surface 11 of spring steel wire 1) of spring 2 is 300ppm or less.Spring 2 is without all
As nitrogen treatment processing under conditions of show enough fatigue strength, the processing is by the surface (spring steel wire 1 of spring 2
Outer surface 11) nitrogen concentration increase to above such range.
Next, by being illustrated to the illustrative methods of manufacture spring steel wire 1 and spring 2.With reference to Fig. 3, pass through reality
The step of preparing wire raw material wire rods is applied as step (S10), starts the method for the manufacture spring steel wire 1 according to the embodiment.
With reference to Fig. 4, prepare wire raw material wire rods 5 in step (S10).Carbon of the wire raw material wire rods 5 containing 0.5 mass of mass %~0.8 %, 1.0
The chromium of the silicon of the mass of quality %~2.5 %, the manganese of 0.2 mass of mass %~1.0 % and 0.5 mass of mass %~2.5 %, surplus
For iron and inevitable impurity.
Specifically, for example, by will be such as according to the SWOSC-B of JIS G3560 or according to the SWOCV-V of JIS G3561
Or the steel of SWOSC-V such as roll and the processing (being converted to tiny pearlite) of patent (patenting) is next quasi-
Standby wire raw material wire rods 5.Wire raw material wire rods 5 are the steel wire materials with the circular cross section 50 and cylindrical outer surface 51 being transversely to the machine direction
Material.
Then implement first time stretching step as step (S20).In step (S20), first is implemented to wire raw material wire rods 5
Secondary stretching (drawing process).Specifically, the wire raw material wire rods 5 prepared in step (S10) are implemented to stretch.In step (S20),
Wire raw material wire rods 5 are stretched to such as 15mm diameter below.
Then implement carburization step as step (S30).When Fig. 5 is shown in carburization step and quenching and tempering step
Between relationship between temperature.In Fig. 5, horizontal axis indicates that elapsed time, the longitudinal axis indicate temperature.In step (S30), to
It has passed through the wire raw material wire rods 5 stretched for the first time in step (S20) and implement Carburization Treatment.
Specifically, have passed through the wire raw material wire rods 5 stretched for the first time in step (S20) in time t with reference to Fig. 50Start
Heating, and in time t1Reach carburizing temperature T1.Hereafter, wire raw material wire rods 5 are maintained at carburizing temperature T1Under, until time t2.Carburizing
Temperature T1It is above or is equal to austenite transition points (A1Transition point) temperature.Such as carburizing temperature T1It is 920 DEG C~930 DEG C.?
During this, wire raw material wire rods 5 are maintained in carburizing atmosphere.That is, wire raw material wire rods 5 are heated in carburizing atmosphere.As a result, packet
The concentration of carbon for including the region on the surface (outer surface 51) of wire raw material wire rods 5 becomes slightly higher than the concentration of carbon of its inside, specifically high
Greater than 0 mass % and it is no more than 0.05 mass %.
In step (S30), the composition of atmosphere is controlled, so that the CP value of atmosphere is the 0.5 mass % of mass %~1.5, more
It is preferred that 0.8 mass of mass %~1.2 %.More specifically, such as gas of propane gas, oxygen and nitrogen is introduced real wherein
It applies in the stove of Carburization Treatment.The propane gas of introducing is decomposed and is reacted with oxygen to generate gas, and carburizing is such as facilitated
CO gas (CO) and methane gas (CH4) and carbon dioxide gas (CO2).Such as by using carbon dioxide sensing
The concentration of carbon dioxide gas and oxygen in device and oxygen sensor measurement atmosphere, and change introducing furnace based on these measurements
The amount of propane gas and oxygen in son, can control CP value.
If measure atmosphere gas composition and based on these measurement to control CP value while pass through gas carburizing with
This mode implements Carburization Treatment, then the concentration of carbon of surface region 12 becomes stable.As a result, the firmness change of surface region 12 subtracts
It is small, and spring steel wire 1 can be easily manufactured so that the hardness of surface region 12 it is taller and bigger than the hardness of interior zone 13 in
0HV and be no more than 50HV.
Then implement quenching and tempering step as step (S40).In step (S40), pass through in step (S30)
The wire raw material wire rods 5 of Carburization Treatment implement quenching and tempering.It, will be from time t with reference to Fig. 51To t2Period in through infiltration
The wire raw material wire rods 5 of carbon processing are from time t2To t3Period in implement quenching.Specifically, by wire raw material wire rods 5 from being higher than or
Equal to austenite transition points (A1Transition point) temperature be cooled to less than or equal to MsThe temperature of point.It can be for example by by raw material
Wire rod 5, which immerses in quenching oil, to be cooled down.The structure for forming the steel of wire raw material wire rods 5 is transformed into martensitic structure by this.As a result,
Complete quenching treatment.
Then, wire raw material wire rods 5 are in time t4It begins to warm up, and in time t5Reach tempering temperature T2.Hereafter, wire raw material wire rods 5
It is maintained at tempering temperature T2Under, until time t6.Tempering temperature T2It is less than austenite transition points (A1Transition point) temperature.Example
Such as tempering temperature T2It is 450 DEG C~600 DEG C.Then from time t6To t7Period in cooling wire raw material wire rods 5.It can be such as
It is cooled down by air.The structure for forming the steel of wire raw material wire rods 5 is changed into tempered martensite structure by this.It is complete as a result,
At tempering.
Then implement second of stretching step as step (S50).In step (S50), pass through in step (S40)
The wire raw material wire rods 5 of quenching and tempering are implemented second and are stretched.
Fig. 6 shows the cross section for the stretching device of implementation steps (S50) on the direction of advance α of wire raw material wire rods 5.
With reference to Fig. 6, the stretching device for implementation steps (S50) includes mold 70.Mold 70 has the direction of advance in wire raw material wire rods 5
The upper through-hole formed across mold 70 of α.Wall surface around the through-hole is the working surface 71 contacted with wire raw material wire rods 5.Through
The wire raw material wire rods 5 for crossing step (S40) are longitudinally advanced to enter the through-hole of mold 70.It is former when wire raw material wire rods 5 reach entrance 78
The outer surface 51 of stockline material 5 is contacted with the working surface 71 of mold 70.Then, wire raw material wire rods 5 are processed and are plastically deformed,
So that shape of the wire raw material wire rods 5 in the cross section being transversely to the machine direction corresponds to the direction of advance α's perpendicular to wire raw material wire rods 5
The shape of working surface 71 in cross section.For mold 70 through-hole in the cross section of the direction of advance α perpendicular to wire raw material wire rods 5
In area, outlet 79 at area be less than entrance 78 at area.It is complete when wire raw material wire rods 5 reach the outlet 79 of mold 70
At the work on the working surface 71 of mold 70, and obtain spring steel wire 1.
The through-hole of mold 70 has conical region, the cross of the direction of advance α perpendicular to wire raw material wire rods 5 of the conical region
Area of section becomes smaller on from entrance 78 towards the direction for exporting 79.The cone angle of conical region, that is, approach angle θ is 0.1 °~7 °.
In the method according to the manufacture spring steel wire 1 of the present embodiment, to above-mentioned suitable in step (S30)
The wire raw material wire rods 5 for constituting composition implement Carburization Treatment slightly to improve the concentration of carbon in the region including the surface, then in step
Suddenly implement quenching and tempering in (S40).This to be formed and the steel of tempered martensite structure is formed by having to be suitably constructed
Spring steel wire 1 hardness only in very thin surface region than inside slightly increase.As a result, it is possible to which spring is easily manufactured
With steel wire 1, so that the hardness of the very thin surface region (surface region 12) from outer surface 11 within 10 μm is set as than inside
The hardness in region 13 is tall and big in 0HV and no more than 50HV.
Although step (S50) not according to the present embodiment manufacture spring steel wire method in steps necessary,
It is the dimensional accuracy implemented the step and improve spring steel wire 1.Ratio of decreased area in step (S50) is preferably 1% or more
And less than 5%, more preferable 2%~3.5%.This makes the increase that hardness is only realized in superficial layer, so as to more easily
Manufacture spring steel wire 1.The ratio of { 110 } texture in central area 14 is also being maintained at low-level by implementation steps (S50)
While (such as 3% or less), the ratio of { 110 } texture is increased in surface region 12.As a result, it is possible to make surface region 12
In { 110 } texture ratio than { 110 } texture in central area 14 ratio height such as 5%~35%.
Wire raw material wire rods 5 can be heated to 150 DEG C~450 DEG C, preferably 200 DEG C by second of stretching in step (S50)
Implement while~350 DEG C of temperature range.That is, warm working can be implemented to wire raw material wire rods 5 in step (S50)
(Wen Lashen).This forms KESHI gas mass in steel, to increase the intensity of spring steel wire 1.It can add by wire raw material wire rods 5
Second of stretching while the temperature range of heat to 25 DEG C~450 DEG C in implementation steps (S50).
Next, by the method for the manufacture spring 2 of the spring steel wire 1 as obtained in step (S50) is described.In step
Suddenly after (S50), implement winding steps as step (S60).With reference to Fig. 1 and 2, such as by by 1 plasticity shape of spring steel wire
As shown in Fig. 2 spiral-shaped, spring steel wire 1 is implemented to wind in step (S60).
Then implement tempering step as step (S70).In step (S70), to the spring wound in step (S60)
Implement tempering with steel wire 1 (spring 2).Specifically, heating spring 2 is induced with reducing into spring 2 in step (S60)
Strain.
Then implement shot-peening step as step (S80).In step (S80), tempering have passed through in step (S70)
The spring 2 of processing implements bead.Although step (S80) not according in the method for the manufacture spring of the embodiment must
Step is wanted, but implements the step and compression stress is applied to the region on the surface for including spring 2, to help to improve tired strong
Degree.It is completed according to the spring 2 of the embodiment by abovementioned steps.It is made it possible to according to the method for the manufacture spring of the embodiment
Enough manufactures show the spring of improved fatigue strength under conditions of reducing the fracture possibility during winding.
Spring steel wire 1 (spring 2) in the step (S80) Jing Guo bead can have nitrogen concentration for 300ppm with
Under surface.That is, can be at shot-peening under conditions of not implementing nitrogen treatment to spring 2 in implementation steps (S80)
Reason.If implementing bead in the case where no nitrogen treatment in the method according to the manufacture spring 2 of the embodiment,
The spring with enough fatigue strength can then be manufactured.
(the second embodiment)
Next, another embodiment will be described, i.e. the second embodiment.According to the spring steel wire of the second embodiment
1 and spring 2 substantially have the advantages that construction identical with spring steel wire 1 and spring 2 according to first embodiment and.So
And according to the spring steel wire of the second embodiment 1 and spring 2 and according to the spring steel wire 1 and spring 2 of first embodiment
The difference is that they do not have carburized layer.
With reference in Fig. 1 and 2, with first embodiment, according to the spring steel wire 1 and spring 2 of the second embodiment
Surface region 12 hardness be higher than interior zone 13 hardness；However, their concentration of carbons having the same.That is, carbon
Concentration is uniform in the cross section 10 being transversely to the machine direction.Even if spring steel wire 1 and spring 2 also can using this construction
Improved fatigue strength is realized under conditions of enough fracture possibilities during reducing winding.
Next, by being illustrated to according to the manufacture spring steel wire of the second embodiment and the method for spring.With reference to
Fig. 7 and 3, according to the method for the manufacture spring steel wire of the second embodiment and spring substantially press in first embodiment into
Row.However, according to the method for manufacturing spring steel wire and spring of the second embodiment and according to the method for first embodiment
The difference is that the Carburization Treatment implemented as step (S30) is omitted, and implements as step (S50) second
Secondary stretching step is essential step.
With reference to Fig. 7, according in the method such as first embodiment of the manufacture spring steel wire of the second embodiment and spring
Started like that by implementation steps (S10) and (S20).Hereafter, implementation steps (S40) and (S50) are without implementation steps
(S30).Although step (S50) is not the steps necessary in first embodiment, step (S50) is in the second embodiment
Steps necessary.
Ratio of decreased area in step (S50) is 1% more than and less than 5%, preferably 2%~3.5%.This makes even if logical
It crosses in omission first embodiment and also only realizes the increase of hardness in superficial layer as step (S30) carburization step implemented,
So as to manufacture the spring steel wire 1 according to the second embodiment.In addition, implementing by as in the first embodiment
Step (S60)~(S80) can manufacture the spring 2 according to the second embodiment.
It should be understood that embodiment disclosed herein is all exemplary in all respects and is not anyway
It is restrictive.The scope of the present invention is defined by the claims, rather than illustrates to limit by front, and in claims
Equivalent meaning and scope in all changes be intended to and be included in.
Reference signs list
1: spring steel wire；2: spring；5: wire raw material wire rods；10: cross section；11: outer surface；12: surface region；13: interior
Portion region；14: central area；50: cross section；51: outer surface；70: mold；71: working face；78: entrance；79: outlet.
Claims (19)
1. a kind of spring steel wire, includes steel, the steel contains the carbon of 0.5 mass of mass %~0.8 %, 1.0 mass %~2.5
The chromium of the silicon of quality %, the manganese of 0.2 mass of mass %~1.0 % and 0.5 mass of mass %~2.5 %, surplus are iron and can not
The impurity avoided, the steel have tempered martensite structure,
Wherein as the region within from outer surface 10 μm surface region hardness than the area in addition to the surface region
The hardness in domain is tall and big in 0HV and no more than 50HV.
2. spring steel wire according to claim 1, wherein the spring steel wire has 15mm diameter below.
3. spring steel wire according to claim 1 or 2, wherein the concentration of carbon of the surface region is than the surface region
Except region concentration of carbon it is tall and big in 0 mass % and be no more than 0.05 mass %.
4. spring steel wire described in any one of claim 1 to 3, wherein { 110 } texture in the surface region
Ratio is higher by 5%~35% than the ratio of { 110 } texture in central area, the central area be from the spring steel wire
The center of gravity of longitudinally perpendicular cross section plays the region within 10 μm.
5. spring steel wire according to any one of claims 1 to 4, wherein the spring steel wire with it is longitudinally perpendicular
Cross section in have 3 μm of circularity below.
6. spring steel wire according to any one of claims 1 to 5, wherein the spring steel wire with it is longitudinally perpendicular
Cross section in have every meter of 1% variation in diameter below.
7. spring steel wire described according to claim 1~any one of 6, wherein the steel also contain 0.05 mass %~
The vanadium of 0.5 mass %.
8. a kind of spring, the spring includes spring steel wire according to any one of claims 1 to 7.
9. spring according to claim 8, wherein it is the surface below 300ppm that the spring, which has nitrogen concentration,.
10. a kind of method for manufacturing spring steel wire, includes the following steps:
Prepare wire raw material wire rods, the wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, 1.0 matter of mass %~2.5
Silicon, the manganese of 0.2 mass of mass %~1.0 % and the chromium of 0.5 mass of mass %~2.5 % of % are measured, surplus is iron and can not keep away
The impurity exempted from；
The wire raw material wire rods are implemented to stretch for the first time；
Carburization Treatment is implemented to the wire raw material wire rods stretched by the first time, so that the surface comprising the wire raw material wire rods
The concentration of carbon concentration of carbon more internal than it in region tall and big in 0 mass % and be no more than 0.05 mass %；And
Quenching and tempering are implemented to the wire raw material wire rods Jing Guo the Carburization Treatment.
11. the method for manufacture spring steel wire according to claim 10, wherein to the institute stretched by the first time
Stating the step of wire raw material wire rods implement Carburization Treatment includes: by being controlled as having 0.5 mass of mass %~1.5 % in composition
The wire raw material wire rods are heated to implement Carburization Treatment in the atmosphere of CP value.
12. the method for manufacturing spring steel wire described in 0 or 11 according to claim 1 further includes quenching and returning to by described
The step of wire raw material wire rods of fire processing implement second of stretching.
13. the method for manufacture spring steel wire according to claim 12, wherein described be stretching in area reduction for the second time
Rate be 1% more than and less than 5% under conditions of implement.
14. a kind of method for manufacturing spring steel wire, includes the following steps:
Prepare wire raw material wire rods, the wire raw material wire rods contain the carbon of 0.5 mass of mass %~0.8 %, 1.0 matter of mass %~2.5
Silicon, the manganese of 0.2 mass of mass %~1.0 % and the chromium of 0.5 mass of mass %~2.5 % of % are measured, surplus is iron and can not keep away
The impurity exempted from；
The wire raw material wire rods are implemented to stretch for the first time；
Quenching and tempering are implemented to the wire raw material wire rods stretched by the first time；And
Implement second to the wire raw material wire rods by the quenching and tempering to stretch,
Wherein it is described be stretching in for the second time Ratio of decreased area be 1% more than and less than 5% under conditions of implement.
15. the method for manufacturing spring steel wire described in any one of 2~14 according to claim 1, wherein by the raw material
Wire rod is heated to implementing second of stretching while 25 DEG C~450 DEG C of temperature range.
16. the method for manufacturing spring steel wire described in any one of 2~15 according to claim 1, wherein described second is drawn
It is stretched outside under 0.1 °~7 ° of approach angle and is implemented by mold.
17. the method for manufacturing spring steel wire described in any one of 0~16 according to claim 1, wherein passing through described first
The wire raw material wire rods are stretched to 15mm diameter below by secondary stretching.
18. a kind of method for manufacturing spring, includes the following steps:
Prepare spring steel wire by the method for manufacturing spring steel wire described according to claim 1 any one of 0~17；With
And
The spring steel wire is wound.
19. the method for manufacture spring according to claim 18 further includes implementing spray to the spring steel wire of the winding
The step of ball processing,
It is the surface below 300ppm that wherein the spring steel wire Jing Guo the bead, which has nitrogen concentration,.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-139668 | 2016-07-14 | ||
| JP2016139668 | 2016-07-14 | ||
| JP2017-038665 | 2017-03-01 | ||
| JP2017038665 | 2017-03-01 | ||
| PCT/JP2017/021367 WO2018012158A1 (en) | 2016-07-14 | 2017-06-08 | Steel spring wire, spring, steel spring wire production method and spring production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109415788A true CN109415788A (en) | 2019-03-01 |
Family
ID=60952027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780042912.7A Pending CN109415788A (en) | 2016-07-14 | 2017-06-08 | Spring steel wire, spring, the method for manufacturing spring steel wire and the method for manufacturing spring |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190233912A1 (en) |
| EP (1) | EP3486344A4 (en) |
| JP (1) | JP6891889B2 (en) |
| CN (1) | CN109415788A (en) |
| WO (1) | WO2018012158A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112449654A (en) * | 2019-07-01 | 2021-03-05 | 住友电气工业株式会社 | Steel wire and spring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6583082B2 (en) * | 2016-03-22 | 2019-10-02 | 住友電気工業株式会社 | Steel wire for spring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012052218A (en) * | 2010-08-03 | 2012-03-15 | Sumitomo Electric Ind Ltd | Spring steel wire, method for producing the same, and spring |
| JP2014206219A (en) * | 2013-04-12 | 2014-10-30 | 日本発條株式会社 | Helical compression spring and method of manufacturing the same |
| JP2014227581A (en) * | 2013-05-23 | 2014-12-08 | 住友電気工業株式会社 | Oil temper wire and method of producing oil temper wire |
| CN104619878A (en) * | 2012-09-14 | 2015-05-13 | 日本发条株式会社 | Helical compression spring and method for manufacturing same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5624503B2 (en) * | 2011-03-04 | 2014-11-12 | 日本発條株式会社 | Spring and manufacturing method thereof |
-
2017
- 2017-06-08 WO PCT/JP2017/021367 patent/WO2018012158A1/en active Application Filing
- 2017-06-08 JP JP2018527446A patent/JP6891889B2/en active Active
- 2017-06-08 EP EP17827290.2A patent/EP3486344A4/en not_active Withdrawn
- 2017-06-08 US US16/317,732 patent/US20190233912A1/en not_active Abandoned
- 2017-06-08 CN CN201780042912.7A patent/CN109415788A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012052218A (en) * | 2010-08-03 | 2012-03-15 | Sumitomo Electric Ind Ltd | Spring steel wire, method for producing the same, and spring |
| CN104619878A (en) * | 2012-09-14 | 2015-05-13 | 日本发条株式会社 | Helical compression spring and method for manufacturing same |
| JP2014206219A (en) * | 2013-04-12 | 2014-10-30 | 日本発條株式会社 | Helical compression spring and method of manufacturing the same |
| JP2014227581A (en) * | 2013-05-23 | 2014-12-08 | 住友電気工業株式会社 | Oil temper wire and method of producing oil temper wire |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112449654A (en) * | 2019-07-01 | 2021-03-05 | 住友电气工业株式会社 | Steel wire and spring |
| CN112449654B (en) * | 2019-07-01 | 2022-07-08 | 住友电气工业株式会社 | Steel wire and spring |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3486344A1 (en) | 2019-05-22 |
| WO2018012158A1 (en) | 2018-01-18 |
| EP3486344A4 (en) | 2019-05-22 |
| JPWO2018012158A1 (en) | 2019-04-25 |
| US20190233912A1 (en) | 2019-08-01 |
| JP6891889B2 (en) | 2021-06-18 |
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