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CN110735087A - high-speed rail fastener production process - Google Patents

high-speed rail fastener production process Download PDF

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Publication number
CN110735087A
CN110735087A CN201911104012.8A CN201911104012A CN110735087A CN 110735087 A CN110735087 A CN 110735087A CN 201911104012 A CN201911104012 A CN 201911104012A CN 110735087 A CN110735087 A CN 110735087A
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China
Prior art keywords
plate
equal
steel
temperature
shaped spring
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Pending
Application number
CN201911104012.8A
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Chinese (zh)
Inventor
朴虎南
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Ningxia Quanyi Mechanical Equipment Research Institute Co Ltd
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Ningxia Quanyi Mechanical Equipment Research Institute Co Ltd
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Priority to CN201911104012.8A priority Critical patent/CN110735087A/en
Publication of CN110735087A publication Critical patent/CN110735087A/en
Pending legal-status Critical Current

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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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/62—Rail fastenings incorporating resilient supports
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/64—Rail fastenings gripping or encircling the sleeper

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The invention discloses a production process of high-speed rail fasteners, which comprises a W-shaped spring, a supporting plate, a lower plate, a steel plate, an elastic plate and bolts, wherein the steel plate is fixedly arranged on the lower plate, the steel plate is fixedly provided with the elastic plate, a steel rail fixing frame is arranged on the elastic plate, the supporting plate is arranged on the elastic plate at two sides of a steel rail, the W-shaped spring is fixedly arranged on the supporting plate through the matching of the bolts and nuts, the W-shaped spring ensures that the steel for the W-shaped spring has strength determined by through reasonable matching of the proportion of elements such as carbon, silicon, chromium, manganese, sulfur, phosphorus and the like, and also has good decarburization resistance, toughness and corrosion resistance, the steel plate improves the hardenability and corrosion resistance of the steel plate through reasonable matching of the proportion of elements such as silicon, manganese, sulfur, phosphorus and the like, and simultaneously improves the fatigue life and the transverse impact toughness of the steel plate.

Description

high-speed rail fastener production process
Technical Field
The invention belongs to the technical field of steel rail laying, and particularly relates to a production process of high-speed rail fasteners.
Background
The rail fastener is a part of a rail for coupling a rail and a sleeper (or other type of underfloor foundation), also called an intermediate coupling part, for fixing the rail to the sleeper, maintaining a gauge and preventing longitudinal and lateral movement of the rail with respect to the sleeper, and includes a spike, an underfloor pad, and an elastic or rigid fastener, etc. the fastener should be effective for a long period of time for reliable coupling of the rail and the sleeper, and sufficiently exert its shock-absorbing performance under dynamic force to delay the accumulation of residual deformation of the rail, and therefore should have sufficient strength, durability, and elasticity determined at , and should be simple in construction to facilitate installation and removal.
Along with the development of high-speed railways in China, the demand of railway fastener systems is larger and larger, the quality requirement is higher and higher, and particularly, the performance requirement of ballastless track fastener systems with the speed per hour as high as 350km/h is more strict.
The elastic strip is required to have high comprehensive mechanical properties because of bearing long-term and periodic alternating stress such as bending, torsion and the like in the use process.
Disclosure of Invention
The invention aims to provide high-speed rail fastener production processes to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
high-speed rail fastener production technology, high-speed rail fastener includes W type spring, layer board, low board, steel sheet, elastic plate and bolt, on the steel sheet is fixed to be provided with the low board, and the fixed elastic plate that is provided with on the steel sheet, the rail mount is established on the elastic plate, and is provided with the layer board on the elastic plate of rail both sides, and through the fixed W type spring that is provided with of bolt and nut cooperation on the layer board.
According to the scheme of step , the raw materials for preparing the W-shaped spring comprise, by mass, 0.52-0.60% of carbon, 0.15-0.36% of silicon, 0.65-0.95% of manganese, 0.65-0.95% of chromium, 0.1-0.3% of sulfur, 0.1-0.3% of phosphorus, and the balance of iron, and the preparation process of the W-shaped spring comprises the following steps:
, uniformly mixing the raw materials, primarily smelting at 1350 ℃ for 5-10 min, raising the temperature from 1350 ℃ to 1800 ℃ at a speed of 10-15 ℃/min, and continuously smelting at 1800 ℃ for 8-14 min;
step two, refining the raw material primarily refined in the step , wherein the refining temperature is 1600-1650 ℃, feeding hot nitrogen at the temperature of 1600-1650 ℃ after refining for 10-15 min, blowing for 5min, and stopping, wherein the refining time is 35-40 min in min;
step three: cooling and forming the raw materials in the second step, controlling the cooling speed to be 3-5 ℃/min, cooling to 1200 ℃, keeping the temperature at 1200 ℃ for 20-25 min, then continuing cooling, controlling the cooling speed to be 15-19 ℃/min until the raw materials are cooled to the normal temperature, and rolling;
step four, quenching, wherein the quenching is divided into two stages, in the th stage, the quenching temperature is controlled to be 750-800 ℃, the quenching time is 40-50 min, in the second stage, the quenching temperature is controlled to be 900-950 ℃, the quenching time is 3-5 min, and tempering is carried out;
step five: and coiling and winding the cooled steel wire to obtain the W-shaped spring.
According to a still further embodiment of the present invention at , the W-shaped spring has a Rockwell hardness of 42-47.
As a further alternative of the method of step , the method comprises the steps of:
, smelting pig iron and low-carbon steel with phosphorus content less than or equal to 0.035% and sulfur content less than or equal to 0.035%;
step two: spheroidizing the smelted molten iron to ensure that the total content of manganese, silicon and the balance alloy in the molten iron is 0.7-0.9%, 0.17-0.37% and less than or equal to 0.2%;
step three: inoculating the molten iron subjected to the spheroidizing treatment in the step two, wherein the inoculation comprises in-ladle inoculation, in-mold inoculation and stream inoculation for three times; the inoculant for in-package inoculation adopts a ferrosilicon inoculant with the granularity of 10mm-20mm, the inoculant for in-mold inoculation adopts a silicon-barium inoculant with the granularity of 1mm-5mm, and the inoculant for stream inoculation adopts a silicon-strontium inoculant with the granularity of 0.2mm-1 mm;
step four: the tapping temperature of molten iron is 1550-; and the heat treatment adopts low-temperature annealing treatment, the heating temperature is 750 +/-20 ℃, the heat preservation time is 2-3 hours, the steel plate is cooled to 600 ℃ along with a furnace and taken out of the furnace, and the steel plate is obtained.
According to the scheme of the invention, the step is carried out, wherein the yield point of the steel plate is more than or equal to 340N/m.m2Tensile strength is not less than 560N/mm2The elongation is more than or equal to 20 percent.
steps are carried out by the invention, wherein the elastic plate is made of polyurethane resin, the static vertical strength of the elastic plate is 20-30KN/mm, and the elongation strength is more than or equal to 1.5N/mm2The elongation is more than or equal to 300 percent, the compression permanent acceptance rate is less than or equal to 15 percent, and the volume inherent low resistance is more than or equal to 1 x 108Ω•CM。
The proposal of is that the supporting plate is made of polyamide containing more than or equal to 30 percent of glass fiber, and the impact strength of the supporting plate is more than or equal to 40KJ/m2Tensile strength is not less than 110N/mm2The tensile band deformation is more than or equal to 3 percent, and the volume inherent low resistance is more than or equal to 1 x 108Omega, CM, density 1.3-1.42g/CM3。
is a further embodiment of the present invention, wherein the low board is made of ethylene vinyl acetate copolymer and has a density of 0.920-1.000g/cm3Volume intrinsic low resistance ≥ 1 x 108Omega, CM, elastic hardness 37-47 omega, CM.
Compared with the prior art, the W-shaped spring steel has the beneficial effects that the W-shaped spring steel is ensured to have -determined strength by reasonably matching the proportion of elements such as carbon, silicon, chromium, manganese, sulfur, phosphorus and the like, has good decarburization resistance, toughness and corrosion resistance, the hardenability and corrosion resistance of the steel plate are improved by reasonably matching the proportion of elements such as silicon, manganese, sulfur, phosphorus and the like, and the fatigue life and the transverse impact toughness of the steel plate are improved.
Drawings
To facilitate understanding by those skilled in the art, the present invention will be further described in conjunction with the accompanying drawings.
Fig. 1 is a front view of high-speed rail fastener production processes.
In the figure: the spring comprises a W-shaped spring 1, a supporting plate 2, a lower plate 3, a steel plate 4, an elastic plate 5 and a bolt 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.
Referring to fig. 1, in the embodiment of the present invention, high-speed rail fasteners are produced, where each high-speed rail fastener includes a W-shaped spring 1, a supporting plate 2, a lower plate 3, a steel plate 4, an elastic plate 5 and a bolt 6, the steel plate 4 is fixedly disposed on the lower plate 3, the elastic plate 5 is fixedly disposed on the steel plate 4, a rail fixing frame is disposed on the elastic plate 5, the supporting plates 3 are disposed on the elastic plates 5 on both sides of the rail, and the W-shaped spring 1 is fixedly disposed on the supporting plate 3 through the bolt 6 and a nut in a matching manner.
The preparation raw materials of the W-shaped spring 1 comprise the following components in percentage by mass: 0.52 to 0.60 percent of carbon, 0.15 to 0.36 percent of silicon, 0.65 to 0.95 percent of manganese, 0.65 to 0.95 percent of chromium, 0.1 to 0.3 percent of sulfur, 0.1 to 0.3 percent of phosphorus and the balance of iron, and the preparation process of the W-shaped spring comprises the following steps:
, uniformly mixing the raw materials, primarily smelting at 1350 ℃ for 5-10 min, raising the temperature from 1350 ℃ to 1800 ℃ at a speed of 10-15 ℃/min, and continuously smelting at 1800 ℃ for 8-14 min;
step two, refining the raw material primarily refined in the step , wherein the refining temperature is 1600-1650 ℃, feeding hot nitrogen at the temperature of 1600-1650 ℃ after refining for 10-15 min, blowing for 5min, and stopping, wherein the refining time is 35-40 min in min;
step three: cooling and forming the raw materials in the second step, controlling the cooling speed to be 3-5 ℃/min, cooling to 1200 ℃, keeping the temperature at 1200 ℃ for 20-25 min, then continuing cooling, controlling the cooling speed to be 15-19 ℃/min until the raw materials are cooled to the normal temperature, and rolling;
step four, quenching, wherein the quenching is divided into two stages, in the th stage, the quenching temperature is controlled to be 750-800 ℃, the quenching time is 40-50 min, in the second stage, the quenching temperature is controlled to be 900-950 ℃, the quenching time is 3-5 min, and tempering is carried out;
step five: and (3) coiling and winding the cooled steel wire to form the W-shaped spring 1.
The Rockwell hardness of the W-shaped spring 1 is 42-47.
The preparation of the steel plate 4 comprises the following steps:
, smelting pig iron and low-carbon steel with phosphorus content less than or equal to 0.035% and sulfur content less than or equal to 0.035%;
step two: spheroidizing the smelted molten iron to ensure that the total content of manganese, silicon and the balance alloy in the molten iron is 0.7-0.9%, 0.17-0.37% and less than or equal to 0.2%;
step three: inoculating the molten iron subjected to the spheroidizing treatment in the step two, wherein the inoculation comprises in-ladle inoculation, in-mold inoculation and stream inoculation for three times; the inoculant for in-package inoculation adopts a ferrosilicon inoculant with the granularity of 10mm-20mm, the inoculant for in-mold inoculation adopts a silicon-barium inoculant with the granularity of 1mm-5mm, and the inoculant for stream inoculation adopts a silicon-strontium inoculant with the granularity of 0.2mm-1 mm;
step four: the tapping temperature of molten iron is 1550-; and the heat treatment adopts low-temperature annealing treatment, the heating temperature is 750 +/-20 ℃, the heat preservation time is 2-3 hours, the steel plate is cooled to 600 ℃ along with a furnace and taken out of the furnace, and the steel plate 4 is obtained.
The yield point of the steel plate 4 is more than or equal to 340N/m.m2Tensile strength is not less than 560N/mm2The elongation is more than or equal to 20 percent.
The elastic plate 5 is made of polyurethane resin, the static vertical strength of the elastic plate 5 is 20-30KN/mm, and the elongation strength is more than or equal to 1.5N/mm2The elongation is more than or equal to 300 percent, the compression permanent acceptance rate is less than or equal to 15 percent, and the volume inherent low resistance is more than or equal to 1 x 108Ω•CM。
The supporting plate 2 is made of polyamide containing more than or equal to 30% of glass fiber, and the impact strength of the supporting plate 2 is more than or equal to 40KJ/m2Tensile strength is not less than 110N/mm2The tensile band deformation is more than or equal to 3 percent, and the volume inherent low resistance is more than or equal to 1 x 108Omega, CM, density 1.3-1.42g/CM3。
The low plate 3 is made of ethylene vinyl acetate copolymer, and the density of the low plate is 0.920-1.000g/cm3Volume intrinsic low resistance ≥ 1 x 108Omega, CM, elastic hardness 37-47 omega, CM.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (8)

  1. The production process of high-speed rail fasteners is characterized by comprising a W-shaped spring (1), a supporting plate (2), a low plate (3), a steel plate (4), an elastic plate (5) and bolts (6), wherein the steel plate (4) is fixedly arranged on the low plate (3), the elastic plate (5) is fixedly arranged on the steel plate (4), a steel rail fixing frame is arranged on the elastic plate (5), the supporting plate (3) is arranged on the elastic plate (5) on two sides of the steel rail, and the W-shaped spring (1) is fixedly arranged on the supporting plate (3) through the bolts (6) and nut in a matched mode.
  2. 2. The high-speed rail fastener production processes of claim 1, wherein the W-shaped spring (1) is prepared from the following raw materials, by mass, 0.52-0.60% of carbon, 0.15-0.36% of silicon, 0.65-0.95% of manganese, 0.65-0.95% of chromium, 0.1-0.3% of sulfur, 0.1-0.3% of phosphorus, and the balance of iron, and the W-shaped spring preparation process comprises the following steps:
    , uniformly mixing the raw materials, primarily smelting at 1350 ℃ for 5-10 min, raising the temperature from 1350 ℃ to 1800 ℃ at a speed of 10-15 ℃/min, and continuously smelting at 1800 ℃ for 8-14 min;
    step two, refining the raw material primarily refined in the step , wherein the refining temperature is 1600-1650 ℃, feeding hot nitrogen at the temperature of 1600-1650 ℃ after refining for 10-15 min, blowing for 5min, and stopping, wherein the refining time is 35-40 min in min;
    step three: cooling and forming the raw materials in the second step, controlling the cooling speed to be 3-5 ℃/min, cooling to 1200 ℃, keeping the temperature at 1200 ℃ for 20-25 min, then continuing cooling, controlling the cooling speed to be 15-19 ℃/min until the raw materials are cooled to the normal temperature, and rolling;
    step four, quenching, wherein the quenching is divided into two stages, in the th stage, the quenching temperature is controlled to be 750-800 ℃, the quenching time is 40-50 min, in the second stage, the quenching temperature is controlled to be 900-950 ℃, the quenching time is 3-5 min, and tempering is carried out;
    step five: and (3) coiling and winding the cooled steel wire to form the W-shaped spring (1).
  3. 3. The kind of high-speed rail fasteners producing process of claim 1, wherein the W-shaped spring (1) has Rockwell hardness of 42-47.
  4. 4. The kind of high-speed rail fasteners producing process of claim 1, wherein the preparation of the steel plate (4) includes the following steps:
    , smelting pig iron and low-carbon steel with phosphorus content less than or equal to 0.035% and sulfur content less than or equal to 0.035%;
    step two: spheroidizing the smelted molten iron to ensure that the total content of manganese, silicon and the balance alloy in the molten iron is 0.7-0.9%, 0.17-0.37% and less than or equal to 0.2%;
    step three: inoculating the molten iron subjected to the spheroidizing treatment in the step two, wherein the inoculation comprises in-ladle inoculation, in-mold inoculation and stream inoculation for three times; the inoculant for in-package inoculation adopts a ferrosilicon inoculant with the granularity of 10mm-20mm, the inoculant for in-mold inoculation adopts a silicon-barium inoculant with the granularity of 1mm-5mm, and the inoculant for stream inoculation adopts a silicon-strontium inoculant with the granularity of 0.2mm-1 mm;
    step four: the tapping temperature of molten iron is 1550-; and the heat treatment adopts low-temperature annealing treatment, the heating temperature is 750 +/-20 ℃, the heat preservation time is 2-3 hours, the steel plate is cooled to 600 ℃ along with a furnace and taken out of the furnace, and the steel plate (4) is obtained.
  5. 5. The kinds of high-speed rail fasteners production process of claim 1, wherein the yield point of the steel plate (4) is 340N/m.m or more2Tensile strength is not less than 560N/mm2The elongation is more than or equal to 20 percent.
  6. 6. The kinds of high-speed rail fasteners production process of claim 1, wherein the elastic plate (5) is made of polyurethane resin, and the elastic plate (5) has a static vertical strength of 20-30KN/mm and an elongation strength of 1.5N/mm or more2The elongation is more than or equal to 300 percent, the compression permanent acceptance rate is less than or equal to 15 percent, and the volume inherent low resistance is more than or equal to 1 x 108Ω•CM。
  7. 7. The kinds of high-speed rail fasteners production process of claim 1, wherein the supporting plate (2) is made of polyamide containing more than or equal to 30% glass fiber, and the impact strength of the supporting plate (2) is more than or equal to 40KJ/m2Tensile strength is not less than 110N/mm2The tensile band deformation is more than or equal to 3 percent, and the volume inherent low resistance is more than or equal to 1 x 108Omega, CM, density 1.3-1.42g/CM3。
  8. 8. The kinds of high-speed rail fasteners production process of claim 1, wherein the low plate (3) is made of ethylene vinyl acetate copolymer and has a density of 0.920-1.000g/cm3Volume intrinsic low resistance ≥ 1 x 108Omega, CM, elastic hardness 37-47 omega, CM.
CN201911104012.8A 2019-11-13 2019-11-13 high-speed rail fastener production process Pending CN110735087A (en)

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Application Number Priority Date Filing Date Title
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1693528A (en) * 2005-05-27 2005-11-09 东风汽车悬架弹簧有限公司 High strength toughness high hardenability spring steel material
JP2011080105A (en) * 2009-10-05 2011-04-21 Kobe Steel Ltd Method for manufacturing steel for spring
CN103717775A (en) * 2011-08-11 2014-04-09 日本发条株式会社 Compression coil spring and method for producing same
JP5653020B2 (en) * 2009-09-29 2015-01-14 中央発條株式会社 Spring steel and springs with excellent corrosion fatigue strength
CN106282754A (en) * 2016-08-31 2017-01-04 安徽恒达铁路器材有限公司 A kind of high-speed railway fastener casting method of low temperature resistant iron chair
CN106319340A (en) * 2016-08-31 2017-01-11 赖世权 Processing method for spring steel
CN206553836U (en) * 2017-02-09 2017-10-13 北京晋佰新技术有限公司 One kind is adjustable to have quarrel to have shoulder block high ferro fastener
CN108823358A (en) * 2018-07-25 2018-11-16 石家庄钢铁有限责任公司 A kind of method for refining of high silicon hypoxemia spring steel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1693528A (en) * 2005-05-27 2005-11-09 东风汽车悬架弹簧有限公司 High strength toughness high hardenability spring steel material
JP5653020B2 (en) * 2009-09-29 2015-01-14 中央発條株式会社 Spring steel and springs with excellent corrosion fatigue strength
JP2011080105A (en) * 2009-10-05 2011-04-21 Kobe Steel Ltd Method for manufacturing steel for spring
CN103717775A (en) * 2011-08-11 2014-04-09 日本发条株式会社 Compression coil spring and method for producing same
CN106282754A (en) * 2016-08-31 2017-01-04 安徽恒达铁路器材有限公司 A kind of high-speed railway fastener casting method of low temperature resistant iron chair
CN106319340A (en) * 2016-08-31 2017-01-11 赖世权 Processing method for spring steel
CN206553836U (en) * 2017-02-09 2017-10-13 北京晋佰新技术有限公司 One kind is adjustable to have quarrel to have shoulder block high ferro fastener
CN108823358A (en) * 2018-07-25 2018-11-16 石家庄钢铁有限责任公司 A kind of method for refining of high silicon hypoxemia spring steel

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