CN1772939A - High purity steel belt for textile needle and its production process - Google Patents
High purity steel belt for textile needle and its production process Download PDFInfo
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- CN1772939A CN1772939A CN 200510110462 CN200510110462A CN1772939A CN 1772939 A CN1772939 A CN 1772939A CN 200510110462 CN200510110462 CN 200510110462 CN 200510110462 A CN200510110462 A CN 200510110462A CN 1772939 A CN1772939 A CN 1772939A
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Abstract
The high purity steel belt for making textile needle consists of C 0.9-1.0 wt%, Mn 0.35-0.50 wt%, Si 0.15-0.30 wt%, P not more than 0.030 wt%, Cr 0.15-0.30 wt% and S not more than 0.007 wt%, except Fe and inevitable impurity. It is 0.4 mm thick, and has thickness tolerance within 0.003 mm. The production process of the high purity steel belt includes thrice metallurgical structure conversions, twice deep rolling to crush crystal grains and once outer size controlling rolling to reach required thickness and plate shape. Ultimately, the cold rolled steel belt has inside carbide grains of 1.5-2.5 micron size accounting for 95 % and hardness of HV 255.
Description
Technical field
The present invention relates to a kind of steel band and production method thereof that is used to make the high purity steel textile needle.
Background technology
The existing former material of knitting needle steel band has homemade T10A quality carbon tool steel, and composition and weight percent thereof are C:0.95-1.04%, Si: Mn≤0.35%: P≤0.40%: S≤0.030% :≤0.025, and all the other are iron.This material carbon content height, the back hardness height that quenches, wear-resistant, toughness is not good, only can satisfy the service requirements of knitting needle substantially, based in producing, low-grade knitting needle, large usage quantity at present.Though can satisfy the basic need of knitting needle, harmful element content own is higher, after high strength processing, occurs the problem that physical and mechanical properties, metallographic structure, non-metallic inclusion etc. do not meet the knitting needle requirement easily.
The knitting needle steel of Sweden belongs to special-purpose steel grade, be a kind of through vacuum treated high alloy tool steel, it is higher to contain the Mn amount, and composition and weight percent thereof are C:0.95-1.04%, Si:0.03%, Mn:0.60-0.80%, P:0.01%, S: Cr:0.25-0.40≤0.003%,, all the other are iron.With the knitting needle excellent property that this material is made, world's famous brand pin is selected this type of steel mostly for use.But the knitting needle steel of Sweden obtains through special technology, and is with high costs, and output is limited simultaneously, is difficult to satisfy the demand that domestic growing high-quality knitting needle is used steel band.
The thickness of knitting needle starting material steel band is very big to the use influence of knitting needle, and the steel band tolerance control of domestic present 0.4mm left and right thickness is generally as follows:
Baoshan Iron and Steel Company: thickness 0.30-0.40mm, high class precision ± 0.025mm
Eight continent industries: thickness 0.40mm, high class precision ± 0.04mm
Posco: thickness 0.40mm, high class precision ± 0.03mm
The thickness deviation of above product is the requirement that can not satisfy senior weaving loom required knitting needle.
Summary of the invention
The objective of the invention is to, provide a kind of and have satisfactory stability and processibility, have the high purity steel belt for textile needle of precise thickness and good interior tissue, meet the requirement of high-grade knitting needle.
High purity steel belt for textile needle provided by the invention, its composition and weight percent are as follows:
C：0.9～1.0％，
Mn：0.35～0.50％，
Si：0.15～0.30％，
P：≤0.030％，
Cr：0.15～0.30％，
S：≤0.007％，
All the other are iron and unavoidable impurities;
Tape thickness with 0.4mm, thickness deviation are controlled at ± 0.003mm.
The Composition Control of steel band is vital.The S element is a harmful element main in the steel, and it can cause that also crystal grain is thick in the steel except well-known meeting causes the red brittleness of steel, produces non-metallic inclusion, and this is the main undesirable element that influences the knitting needle performance.The present invention is controlled at the content of S below 0.007%, and that can avoid that material factors brings is bad at all, for the high strength calendering and the processing in later stage provides assurance.
Another object of the present invention is, the manufacture method of described high purity steel belt for textile needle is provided, promptly, the metallographic that need pass through tertiary cementite-austenite-cementite from above-mentioned starting material steel band to finished product transforms, and smash crystal grain, profile control calendering control thickness and plate shape by the calendering of twice degree of depth, specifically comprise following operation:
(1) starting material steel band annealing;
(2) steel band initially rolls;
(3) steel band second annealing;
(4) calender line in the middle of;
(5) three annealing of steel band;
(6) control of finished product template and modified calendering.
The manufacture method of high purity steel belt for textile needle of the present invention, the draft of the initial calendering of steel band are 33～37%, the draft of middle calender line is 52～56%, the control of finished product template and modified calendering draft be 30～35%.
Calender line adopts omnidistance precision current control, by the accurate measurement of strength of current in the pair roller gap, converses the actual power of depressing of milling train, carries out quantization operation.
The draft of preceding twice calendering of starting material steel band all is greater than 33%, is guaranteeing that cold-rolled process efficiently reaches under the uniform prerequisite of the each deformation of material structure, the draught of the each calendering of control rationally.In the actual operation of rolling, also must actually depress tonnage or the main frame electric current is adjusted control to the Theoretical Calculation data according to what cold-rolling mill showed.Increase along with material deformation, the variation of material self-temperature and oil temperature, and whole speed tension variation in the degree of fatigue of oil mass, roller surface and thermal expansion, the operation of rolling, make that frictional coefficient is a variable, therefore control rational draught and help the control of plate shape.
Rolling press employing Frequency Converter Control, thus the quick and accurate of control guaranteed.
The temperature of lubricating oil is controlled at 20～42 ℃ in each calender line.
The thickness and precision of steel band is extremely important, the thick partially knitting machine of can not packing into, thin partially elasticity, toughness and the working strength that then can not guarantee knitting needle.We have installed little electric probe terminal on rolling press, the elongatedness direction is measured immediately on steel band, reflect the thickness fluctuation of material by the quantification of little electricity.And measuring result fed back to the operator in the pointer mode, be convenient to the operator and adjust.This metering system quick and precisely, thereby the precision that guarantees thickness measurement and feedback can reach ± 0.001mm.
After the control of finished product template, the controllable thickness of material is built in ± 0.003mm.The finished product pin that is processed into like this is in the actual woven process, and the progressive error that produce in the unit width are littler, and the class that improves textiles is had active effect.
Guarantee the good plate of material shape control and the unrelieved stress of minimizing material internal, must select the suitable tonnage of depressing, roll crown, and speed of cooling and temperature behind the control material rolling deformation that will be suitable.If it is low excessively to stop rolling temperature, also have big internal stress residue in the steel band, the blank needle body after the material punching press easily deforms.If the material rolling temperature is too high, the ROLLING OIL of roll and storeroom is along with oily temperature rise, its lubricant effect reduces, and the reduction of material Yin Wendu high rigidity, with the frictional coefficient increase of roll shop building, material is in the rolling deformation process so, the levelling property on surface reduces, and causes material surface local deformaton inconsistent, forms block ripple glaze, therefore the material Flatness is poor, and material thickness can't accurately be measured control.In general, the carbon content of steel and the ratio of other alloying element are depended in the hardness of steel and work hardening, the common high more material of hardness, and its rolling friction coefficient is more little.When the carbon content in the steel increased, frictional coefficient can reduce.In general, along with the increase of alloying element, frictional coefficient descends.The metal that adhesivity is stronger has bigger frictional coefficient usually, as lead, aluminium, zinc etc.The hardness of material, intensity are high more, and frictional coefficient is just more little.Thereby every chemical ingredients that can improve material hardness, intensity all can make frictional coefficient reduce.
Rationally utilize the work hardening characteristic of material, control the hardness of final finished material, and satisfy client's technical requirements.The die life of hardness decision client in punching course of material.Needle body is in the groove milling process, if material hardness is low, iron filings are attached on the milling cutter of Wimet easily, causes the groove milling of needle body crooked, forms the substandard products pin.30～35%, we can control the hardness of product in Hv255 ± 15 scopes by the ratio finally depressed.
On the plastic working principle of material, the high carbon steel material is after the process cold deformation, and the crystalline structure of steel distorts, and promote the answer and the recrystallize of pearlitic structure, but its key is to control rational deformation extent.In conjunction with multi-pass low temperature Spheroidizing Annealing, change the pearlitic structure form of material, and eliminate original tissue defects (as: Wei Shi body tissue, banded structure etc.), thereby obtain tiny and uniform coccoid pearlitic structure again.This also be guarantee to have high strength after textile needle quenches, the primary prerequisite of high-wearing feature and the good anti-ability of fractureing.
The main purpose of Spheroidizing Annealing, be to wish to make the stratiform of ferrous materials inside or carbide network cohesion become spherical by thermal treatment, make carbide spheroidization with cutting ability and the working plasticity that improves steel, also can increase toughness after the quenching of steel, prevent hardening crack, the work-ing life of also can improve mechanical properties behind the Q-tempering of steel, improving steel.
For guaranteeing that the material that offers the client has good nodularization cementite tissue, will consider that also the client is to the Drawing abillity requirement.Therefore we adjust to the tissue of material the physical aspect that is fit to client's the finished product characteristic and processing characteristics by the low temperature carbide annealing process of multi-pass.In order to guarantee that material is after annealing in the stove, the surface that still can keep light, we use purity to reach protective atmosphere in the stove of 99.999% high-purity hydrogen and high pure nitrogen, utilize the good heat conductive performance of hydrogen, it is evenly efficient to guarantee that material monolithic heats up, and the homogeneous microstructure nodularization; Again according to different steel grades, different thickness specification, the hydrogen of reasonable ratio, nitrogen ratios, accurately control heats up and soaking time, carburizing (nitrogen) phenomenon that occurs with the too fast material surface that prevents to heat up, thus the surface-brightening that guarantees material is attractive in appearance.According to the computerized control system temperature displayed of bell furnace, we produce the surface oxidation phenomenon in the different different tapping temperatures of control in season to prevent red-hot material and airborne oxygen.Multiple low-temperature carbide annealing process of the present invention can guarantee that organized whole's nodularization of material is even fully, concrete processing condition are: 700～730 ℃ of starting material steel band annealing temperatures, 695～725 ℃ of steel band second annealing temperature, 675～705 ℃ of three annealing temperatures of steel band; Adopt liquid nitrogen and pure hydrogen as shielding gas during annealing, ratio is H
21.30～1.50m
3/ h, N
23.10～3.50m
3/ h.
By the Spheroidizing Annealing of multi-pass, the carbide size of material is controlled in the controlled scope.According to the metallograph of organizing of material, under the prerequisite of 1000 times of amplifications, the carbide particle size is about 1.5～2.5 μ m, and carbide quantity is at 100 μ m
2Scope in, about 15～25, and shape is evenly coccoid.The inner 95% carbide particle size of the final cold rolling steel band that obtains is distributed in 1.5～2.5 μ m.By Spheroidizing Annealing repeatedly, original defect structure in the material is progressively improved, eliminated Wei Shi body and banded structure.
Based on more than, also can be according to actual needs, adjust the size of metallographic structure, with the service requirements (wear resistance and the favorable mechanical processing characteristics of height) of satisfying the final user.
Embodiment
Starting material are the NS-4 steel band of contriver and the exploitation of Kawasaki, Japan system ironworker industry K.K. Union, and thickness is 2.0mm, and chemical ingredients is C:0.9～1.0%, Mn:0.35～0.50%, Si:0.15～0.30%, P :≤0.030%, Cr:0.15～0.30%, S :≤0.007%; All the other are iron.
Steel band through the 0.40mm thickness that obtains having desired precise thickness and good template after starting material cut-outs, first annealing, first calendering, second annealing, secondary calendering, three annealing, three calenderings, the control of finished product template and the modified calendering, its width is about 150mm, and effective width reaches 98%.Actual conditions is as follows:
Starting material cut off:
Thickness of slab: 2.00mm
Cut off back wide cut: 145mm ± 0.5mm
Cut off back quality: 4～12kg/mm
First annealing:
Thickness: 2.0mm before the annealing
Annealing temperature: 715 ℃
Soaking time: 85min
Protective atmosphere: H
21.41m
3/ h, N
23.29m
3/ h
First calendering:
Calendering final thickness: 1.00mm ± 0.010mm
Calendering number of times: 5
Rolling oil temperature: 20～42 ℃
Calendering electric current: in the 60A
Second annealing:
Thickness: 1.0mm ± 0.010mm before the annealing
Annealing temperature: 710 ℃
Soaking time: 70min
The secondary calendering:
Calendering final thickness: 0.60mm ± 0.008mm
Calendering number of times: 2
Rolling oil temperature: 20～42 ℃
Calendering electric current: in the 60A
Three annealing:
Thickness: 0.60mm ± 0.008mm before the annealing
Annealing temperature: 690 ℃
Soaking time: 60min
Three calenderings:
Calendering final thickness: 0.40mm ± 0.005mm
Calendering number of times: 4
Rolling oil temperature: 20～42 ℃
Calendering electric current: in the 80A
Final leveling:
Calendering final thickness: 0.40mm ± 0.003mm
Calendering number of times: 1
By above-mentioned condition, we have obtained needed low impurity, high strength, and thickness is accurate, the high pure knitting needle steel band that template is good.Its thickness deviation is at ± 0.003mm, and the inner 95% carbide particle size of product is distributed in 1.5～2.5 μ m, and final finished hardness is in Hv255 ± 15.After the deep processing through knitting needle manufacturer, knitting needle can have good wear resistance, and elasticity and stability can satisfy the manufacturing requirement of high-quality fabric.Now this kind product is accepted by first three big knitting needle manufacturer of the world, has vast market prospect.
Claims (9)
1, a kind of cold rolling steel band is used to continue to be processed into the high purity steel textile needle, it is characterized in that:
Have following ingredients and weight percent:
C：0.9～1.0％，
Mn：0.35～0.50％，
Si：0.15～0.30％，
P：≤0.030％，
Cr：0.15～0.30％，
S：≤0.007％，
All the other are iron and unavoidable impurities;
Tape thickness with 0.4mm, thickness deviation are controlled at ± 0.003mm.
2, realize the method for the described steel band of claim 1, it is characterized in that, the metallographic that need pass through tertiary cementite-austenite-cementite from starting material to the finished product transforms, and smash crystal grain, profile control calendering control thickness and plate shape by the calendering of twice degree of depth, specifically comprise following operation:
The annealing of-starting material steel band;
-steel band initially rolls;
The second annealing of-steel band;
-middle calender line;
Three annealing of-steel band;
Control of-finished product template and modified calendering.
3, in accordance with the method for claim 2, it is characterized in that, the draft of the initial calendering of steel band is 33～37%, the draft of middle calender line is 52～56%, the control of finished product template and modified calendering draft be 30～35%.
According to the described method of claim 2～3, it is characterized in that 4, rolling press adopts frequency transformer to control.
According to the described method of claim 2～4, it is characterized in that 5, the temperature of lubricating oil is controlled at 20～42 ℃ in each calender line.
According to the described method of claim 2～5, it is characterized in that 6, calender line adopts omnidistance precision current control, by the accurate measurement of strength of current in the pair roller gap, converses the actual power of depressing of milling train, carries out quantization operation.
7, according to the described method of claim 2～6, it is characterized in that, calender line adopts the thickness measurement system of feedback in real time, promptly, use little electric probe terminal elongatedness direction on steel band to measure in real time, change the thickness fluctuation that quantitative response goes out material by little electricity, guarantee that the precision of thickness measurement and feedback can reach ± 0.001mm, in time adjust thereby be convenient to the operating personnel.
8, in accordance with the method for claim 2, it is characterized in that starting material steel band annealed temperature is 700～730 ℃, the temperature of steel band second annealing is 695～725 ℃, and three annealed temperature of steel band are 675～705 ℃; Adopt liquid nitrogen and pure hydrogen as shielding gas during annealing, ratio is H
21.30～1.50m
3/ h, N
23.10～3.50m
3/ h.
According to the described method of claim 2～8, it is characterized in that 9, the inner 95% carbide particle size of the final cold rolling steel band that obtains is distributed in 1.5～2.5 μ m; Hardness is Hv255 ± 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510110462 CN1772939A (en) | 2005-11-17 | 2005-11-17 | High purity steel belt for textile needle and its production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510110462 CN1772939A (en) | 2005-11-17 | 2005-11-17 | High purity steel belt for textile needle and its production process |
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| CN1772939A true CN1772939A (en) | 2006-05-17 |
Family
ID=36760077
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106062218A (en) * | 2013-12-19 | 2016-10-26 | 格罗兹-贝克特公司 | Tool for textiles and production method for same |
| CN106583607A (en) * | 2016-12-05 | 2017-04-26 | 扬州多维精工机械厂 | Production method for high purity steel needle |
| CN107415366A (en) * | 2017-05-05 | 2017-12-01 | 广东澳洋顺昌金属材料有限公司 | Furniture high score film color coated steel sheet and preparation method thereof |
| CN110306027A (en) * | 2019-07-02 | 2019-10-08 | 浙江豪环新材料有限公司 | A kind of T8 carbon steel cold-rolling production process |
| WO2021007915A1 (en) * | 2019-06-26 | 2021-01-21 | 江苏省沙钢钢铁研究院有限公司 | Superfine extra-high-strength steel wire, steel wire rod, and production method of the steel wire rod |
| WO2021090472A1 (en) * | 2019-11-08 | 2021-05-14 | 株式会社特殊金属エクセル | High-carbon cold-rolled steel sheet and production method therefor, and mechanical parts made of high-carbon steel |
-
2005
- 2005-11-17 CN CN 200510110462 patent/CN1772939A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106062218A (en) * | 2013-12-19 | 2016-10-26 | 格罗兹-贝克特公司 | Tool for textiles and production method for same |
| US10487429B2 (en) | 2013-12-19 | 2019-11-26 | Groz-Beckert Kg | Tool for textiles and production method for same |
| CN106062218B (en) * | 2013-12-19 | 2021-08-17 | 格罗兹-贝克特公司 | Textile tool and manufacturing method for the same |
| CN106583607A (en) * | 2016-12-05 | 2017-04-26 | 扬州多维精工机械厂 | Production method for high purity steel needle |
| CN107415366A (en) * | 2017-05-05 | 2017-12-01 | 广东澳洋顺昌金属材料有限公司 | Furniture high score film color coated steel sheet and preparation method thereof |
| WO2021007915A1 (en) * | 2019-06-26 | 2021-01-21 | 江苏省沙钢钢铁研究院有限公司 | Superfine extra-high-strength steel wire, steel wire rod, and production method of the steel wire rod |
| CN110306027A (en) * | 2019-07-02 | 2019-10-08 | 浙江豪环新材料有限公司 | A kind of T8 carbon steel cold-rolling production process |
| WO2021090472A1 (en) * | 2019-11-08 | 2021-05-14 | 株式会社特殊金属エクセル | High-carbon cold-rolled steel sheet and production method therefor, and mechanical parts made of high-carbon steel |
| JP6880245B1 (en) * | 2019-11-08 | 2021-06-02 | 株式会社特殊金属エクセル | High carbon cold rolled steel sheet and its manufacturing method and high carbon steel machine parts |
| CN113099723A (en) * | 2019-11-08 | 2021-07-09 | 株式会社特殊金属超越 | High-carbon cold-rolled steel sheet, method for producing same, and high-carbon steel machine component |
| EP3848477A4 (en) * | 2019-11-08 | 2022-05-25 | Tokushu Kinzoku Excel Co., Ltd. | High-carbon cold-rolled steel sheet and production method therefor, and mechanical parts made of high-carbon steel |
| CN113099723B (en) * | 2019-11-08 | 2023-02-17 | 株式会社特殊金属超越 | High-carbon cold-rolled steel sheet, method for producing same, and high-carbon steel machine component |
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