CN106399647A - Process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel - Google Patents
Process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel Download PDFInfo
- Publication number
- CN106399647A CN106399647A CN201610848566.9A CN201610848566A CN106399647A CN 106399647 A CN106399647 A CN 106399647A CN 201610848566 A CN201610848566 A CN 201610848566A CN 106399647 A CN106399647 A CN 106399647A
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- China
- Prior art keywords
- rolling
- cold rolling
- lead bath
- thickness
- sorbitizing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel. High-carbon steel SK5 with the thickness of 2.5mm is selected; the process comprises the process routes of unreeling and shelling, pickling, temper rolling, reeling, first-stage cold rolling, isothermal quenching, second-stage cold rolling, striping and packaging; process parameters are set as follows: the outlet thickness of a temper rolling mill is set to be 2.3mm; the first-stage cold rolling thickness is 1.9mm; lead bath is adopted in isothermal quenching, the lead bath entering temperature is 790 DEG C, the lead bath temperature is 420 DEG C, the band steel running speed is 2.0m/min, water cooling is carried out after a structure is taken out of the lead bath, and the structure taken out of the lead bath is required to be a sorbite; and a finished product with the thickness of 0.25mm is rolled by three rolling processes in the second-stage cold rolling. A safety belt collecting coil spring produced by using the process disclosed by the invention is subjected to durability test for 90000 times or above, so that the requirement for materials of medium-high-end cars is met.
Description
Technical field
The invention belongs to field of metallurgy, it is related to a kind of cold-rolling process, particularly relate to one kind and realize high intensity high fatigue bullet
Spring ribbon steel sorbitizing cold-rolling process.
Background technology
Car belt tightens up wind spring, domestic existing be all with Si-Mn series alloy spring steel material use, due to
Limited by processing mode, intensity maintains 1700MPa, within fatigue maintains 70,000 times, can be with the car of low side, card
Car is supporting, but the material requirements intensity for middle and high end car reaches 2100MPa, and fatigue reaches more than 90,000 times.Existing process
Desired strength and durability times can't be reached（Times of fatigue）.
Content of the invention
It is an object of the invention to provide one kind realizes high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process, pass through
The seat belt of the technique productions of the present invention collects wind spring, long duration test number of times（Times of fatigue）Reach more than 90,000 times, in meeting
The material requirements of high-end car.
The purpose of the present invention is achieved through the following technical solutions：
One kind realizes high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process it is characterised in that this technique is specific as follows：
1）Material choice：Select to use high-carbon steel SK5, thickness 2.5mm；
2）Technological design
（1）Process route
Uncoiling is peeled off, and pickling is smooth to wind first stage cold rolling isothermal hardening second stage
Cold rolling article points packaging；
（2）Technological parameter is arranged
Planisher exit thickness is set to 2.3mm；
First stage, the cold rolling thickness that rolls was 1.9mm；
Isothermal hardening adopts lead bath, enters lead bath temperature and is 790 DEG C, lead bath temperature is 420 DEG C, tape running speed is 2.0m/min, goes out
Water-cooled after lead bath is it is desirable to go out lead bath is organized as sorbite；
Cold rolling point of three rolling processes of second stage roll finished product thickness 0.25mm.
In the present invention, the agitation of lead pond or plus fan it is ensured that the stablizing of temperature；After going out lead pond, lead is removed on surface.Rolling procedure
1.9mm---0.25mm, using 8 passes, specific as follows：
The present invention is had both using the obdurability of the sorbite tissue of high-carbon steel, has the characteristics that excellent cold-forming property, passes through
Accurately heat treatment isothermal transformation and reasonably cold rolling flow process realizing high intensity, high fatigue property.
The present invention produces and reaches 2100MPa for the tensile strength making seat belt wind spring material, and times of fatigue reaches 9
Ten thousand times.Compare older production method, simple in selection, substitute steel alloy with carbon steel, cost-effective, performance indications also have relatively
Big lifting, times of fatigue is far above 4.5 ten thousand times.And can meet U.S. system, the joint brand car such as Japanese using will
Ask, substitute import.
Specific embodiment
One kind realizes high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process, specific as follows：
Material choice：Select to use high-carbon steel SK5, thickness 2.5mm, do not adopt alloy spring steel.
Technological design：Process route is as follows：
Uncoiling is peeled off, and pickling is smooth to wind first stage cold rolling isothermal hardening second stage
Cold rolling article points packaging.
Technological parameter is arranged：Planisher exit thickness is set to 2.3mm, and the first stage, the cold rolling thickness that rolls was 1.9mm, isothermal
Quenching adopts lead bath, enters lead bath temperature and is 790 DEG C, lead bath temperature is 420 DEG C, tape running speed is 2.0m/min, goes out water after lead bath
Cold it is desirable to go out lead bath is organized as sorbite.Cold rolling point of three rolling processes of second stage roll finished product thickness 0.25mm.
Technology key point：The agitation of lead pond or plus fan it is ensured that the stablizing of temperature.After going out lead pond, lead is removed on surface.Rolling procedure
1.9mm---0.25mm
2100MPa is reached by the tensile strength for making seat belt wind spring material that the present invention produces, times of fatigue reaches
To 90,000 times.
Claims (3)
1. one kind realizes high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process it is characterised in that this technique is concrete such as
Under：
1）Material choice：Select to use high-carbon steel SK5, thickness 2.5mm；
2）Technological design
Process route
Uncoiling is peeled off, and pickling is smooth to wind first stage cold rolling isothermal hardening second stage
Cold rolling article points packaging；
Technological parameter is arranged
Planisher exit thickness is set to 2.3mm；
First stage, the cold rolling thickness that rolls was 1.9mm；
Isothermal hardening adopts lead bath, enters lead bath temperature and is 790 DEG C, lead bath temperature is 420 DEG C, tape running speed is 2.0m/min, goes out
Water-cooled after lead bath is it is desirable to go out lead bath is organized as sorbite；
Cold rolling point of three rolling processes of second stage roll finished product thickness 0.25mm.
2. according to claim 1 realize high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process, its feature exists
In：The agitation of lead pond or plus fan it is ensured that the stablizing of temperature；After going out lead pond, lead is removed on surface.
3. according to claim 1 realize high intensity high fatigue spring ribbon steel sorbitizing cold-rolling process, its feature exists
In：Rolling procedure 1.9mm---0.25mm, using 8 passes, specific as follows：
.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848566.9A CN106399647A (en) | 2016-09-26 | 2016-09-26 | Process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848566.9A CN106399647A (en) | 2016-09-26 | 2016-09-26 | Process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106399647A true CN106399647A (en) | 2017-02-15 |
Family
ID=57996643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610848566.9A Pending CN106399647A (en) | 2016-09-26 | 2016-09-26 | Process for realizing sorbitizing cold rolling of high-strength and high-fatigue spring narrow band steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106399647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110157883A (en) * | 2019-06-19 | 2019-08-23 | 南通江勤美金属制品有限公司 | Sorbite strip production technology |
| CN111118255A (en) * | 2019-12-23 | 2020-05-08 | 浙江富日进材料科技有限公司 | Processing method of precision steel belt for automobile safety belt coil spring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680069A (en) * | 2007-06-05 | 2010-03-24 | Posco公司 | High carbon steel sheet superior in fatiugue lifeand manufacturing method thereof |
| CN103952624A (en) * | 2014-04-21 | 2014-07-30 | 武汉钢铁(集团)公司 | Ultrahigh-strength painted bundling belt with thickness of 0.2mm and production method thereof |
| CN104080936A (en) * | 2011-11-28 | 2014-10-01 | 新日铁住金株式会社 | Stainless steel and method of manufacturing same |
| CN105219945A (en) * | 2014-06-03 | 2016-01-06 | 无锡威顺金属制品有限公司 | A kind of wireline high-carbon carbon steel wire heat treating method |
-
2016
- 2016-09-26 CN CN201610848566.9A patent/CN106399647A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680069A (en) * | 2007-06-05 | 2010-03-24 | Posco公司 | High carbon steel sheet superior in fatiugue lifeand manufacturing method thereof |
| CN104080936A (en) * | 2011-11-28 | 2014-10-01 | 新日铁住金株式会社 | Stainless steel and method of manufacturing same |
| CN103952624A (en) * | 2014-04-21 | 2014-07-30 | 武汉钢铁(集团)公司 | Ultrahigh-strength painted bundling belt with thickness of 0.2mm and production method thereof |
| CN105219945A (en) * | 2014-06-03 | 2016-01-06 | 无锡威顺金属制品有限公司 | A kind of wireline high-carbon carbon steel wire heat treating method |
Non-Patent Citations (1)
| Title |
|---|
| 陈全明: "《金属材料及强化技术》", 31 October 1992, 同济大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110157883A (en) * | 2019-06-19 | 2019-08-23 | 南通江勤美金属制品有限公司 | Sorbite strip production technology |
| CN111118255A (en) * | 2019-12-23 | 2020-05-08 | 浙江富日进材料科技有限公司 | Processing method of precision steel belt for automobile safety belt coil spring |
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Application publication date: 20170215 |