CN102994904A - Cold-rolled strip for high-precision spring and production method thereof - Google Patents
Cold-rolled strip for high-precision spring and production method thereof Download PDFInfo
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- CN102994904A CN102994904A CN2012104164726A CN201210416472A CN102994904A CN 102994904 A CN102994904 A CN 102994904A CN 2012104164726 A CN2012104164726 A CN 2012104164726A CN 201210416472 A CN201210416472 A CN 201210416472A CN 102994904 A CN102994904 A CN 102994904A
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Abstract
The invention relates to a cold-rolled strip for a high-precision spring and a production method of the cold-rolled strip. The cold-rolled strip for the high-precision spring is characterized by being manufactured through the steps of performing smelting, hot rolling, acid cleaning, cold rolling and the like on raw materials such as waste iron, steel, molybdenum, niobium and vanadium scraps. The spring which is processed by using the cold-rolled strip is difficult to fracture, has a long service life and is suitable for the production fields of clocks, mechanical toys, household appliances (such as washing machines and dust collectors), measuring tapes, automobile safety belts and the like.
Description
Technical field
The present invention relates to a kind of steel band and preparation method thereof.Specifically, be cold-rolled steel strip of using of production high precision spring and preparation method thereof.Be applicable to the production fields such as clock and watch, action toy, household electrical appliance (washing machine, suction cleaner etc.), tape measure, car safety safety belt.
Background technology
Know all that at metallurgy industry spring is mainly used in the production fields such as clock and watch, action toy, household electrical appliance (washing machine, suction cleaner etc.), tape measure, car safety safety belt with cold-rolled steel strip.At present, the high precision spring mainly contains 60 silicon, 2 manganese, 60 silicon, 2 manganese A, 60 silicon, 2 chromium A and 60 silicon, 2 chrome alum A with cold-rolled steel strip, more than four kinds of springs with the technological process of production of cold-rolled steel strip be: melting, cast, hot rolling and cold rolling.There is following defective in above-mentioned several spring with cold-rolled steel strip, the easy alligatoring of steel band crystal grain during hot rolling, and the fragility tendency is serious when cold rolling, so that easy to crack, fracture, cold rolling relatively difficulty, lumber recovery is low.Therefore, roll in the process in acid and continue again cold rolling complete processing after generally all adopting little draft namely to send clock hood type furnace annealing.But the little rate that presses down namely send the shortcoming of clock hood type furnace annealing process to be, owing to need tens hours 700 degree soak annealing, very easily cause separating out of graphite carbon, thereby have influence on the over-all properties after spring quenches, so that the bullet of spring subtracts pulling force is less, therefore, with the spring easy fracture of cold-rolled steel strip processing, work-ing life is short.
Summary of the invention
The problem to be solved in the present invention provides a kind of high precision spring cold-rolled steel strip.With the spring of this cold-rolled steel strip processing, easy fracture not, long service life.
For addressing the above problem, take following technical scheme:
High precision spring of the present invention comprises the raw material of following parts by weight with the characteristics of cold-rolled steel strip:
94.98 ~ 96.53 parts of iron and steel scrap;
0.25 ~ 0.35 part of molybdenum;
0.15 ~ 0.25 part of niobium;
0.10 ~ 0.20 part of vanadium.
Preparing described high precision spring may further comprise the steps successively with the characteristics of the method for cold-rolled steel strip:
The first step is smelted
First iron and steel scrap is toasted, remove moisture wherein;
Afterwards, moisture free iron and steel scrap is dropped in the intermediate frequency electric arc furnace, be smelted into metallic solution;
Afterwards, carry out the on-the-spot sample analysis row element adjustment of going forward side by side, the % by weight that makes following element in the metallic solution account for the metallic solution gross weight is respectively:
Carbon 0.58 ~ 0.66 % by weight
Silicon 1.60 ~ 1.90 % by weight
Manganese 0.60 ~ 0.90 % by weight
Phosphorus 0.005 ~ 0.030 % by weight
Sulphur 0.005 ~ 0.030 % by weight;
Chromium 0.10 ~ 0.35 % by weight;
Nickel 0.12 ~ 0.35 % by weight;
Afterwards, metallic solution is poured in the vacuum induction furnace, carried out degassedly when adding molybdenum, vanadium, niobium element, carry out refining;
At last, metallic solution is poured into steel ingot;
Second step carries out hot rolling
With the stepped start-stop system gas-fired furnace steel ingot is carried out preheating, soaking and insulation successively first, and steel ingot was all stopped 28 ~ 32 minutes at preheating section, soaking zone and holding-zone respectively, make the steel ingot temperature reach 1150 ~ 1170;
Afterwards, utilizing the cross-arranging type five stand mill that square ingot roughing is become thickness is the slab of 55 ~ 65mm;
Afterwards, with five frame hot continuous mills slab finish rolling being become thickness is the torrid zone of 2.65 ~ 2.75mm; When tropical temperature is down to 800 ~ 850, with horizontal reel tropical hot rolling is become steel coil strip;
In the 3rd step, carry out pickling
First with 10 ~ 15 m/mins speed, make steel band by concentration be 15 ~ 20%, temperature is the acid storages of 60 ~ 80 degree, and steel band is carried out pickling, removes the iron scale of steel strip surface;
In the 4th step, carry out cold rolling
To be rolled into through the steel band of pickling the made-up belt that thickness is 1.5mm with four roller high-speed cold mills first;
Afterwards, be that the made-up belt of 1.5mm is put into continuous bright annealing furnace with thickness, under the protection of decomposed ammonia body, soften clean annealing;
Afterwards, will be rolled into through the made-up belt of softening annealing the work in-process steel band of 0.60mm with four roller high speed reversible precise cold milling trains;
Afterwards, the work in-process steel band is put into continuous bright annealing furnace, under the protection of decomposed ammonia body, carry out softening annealing;
At last, with six roller high speed reversible precise cold milling trains, will be rolled into through the 0.60mm of softening annealing work in-process steel band the steel band of 0.30mm, be high precision spring cold-rolled steel strip of the present invention.
Take such scheme, have the following advantages:
Can be found out by such scheme, owing to contain niobium, vanadium, W elements in the raw material of the present invention, utilize precipitation strength to realize mutually the method for crystal grain thinning, reach the fragility tendency of improving cold-rolled steel strip.So that the cold-rolled steel strip of producing is not easy to crack, easy fracture is cold rolling uneasy, the lumber recovery height.Therefore, the spring quality that adopts this cold-rolled steel strip to process is good, long service life.
Embodiment
Below in conjunction with embodiment the present invention is described in further details:
Embodiment one
Choose first the iron and steel scrap of 96.53 weight parts, the molybdenum of 0.25 weight part, the niobium of 0.15 weight part and the vanadium of 0.10 weight part, stand-by.
The first step is smelted
First iron and steel scrap is toasted, remove moisture wherein.
Afterwards, moisture free iron and steel scrap is dropped in the intermediate frequency electric arc furnace, be smelted into metallic solution.
Afterwards, carry out the on-the-spot sample analysis row element adjustment of going forward side by side, the % by weight that makes following element in the metallic solution account for the metallic solution gross weight is respectively:
Carbon 0.58 % by weight
Silicon 1.60 % by weight
Manganese 0.60 % by weight
Phosphorus 0.030 % by weight
Sulphur 0.030 % by weight;
Chromium 0.10 % by weight;
Nickel 0.12 % by weight.
Afterwards, metallic solution is poured in the vacuum induction furnace, carried out degassedly when adding molybdenum, vanadium, niobium element, carry out refining.
At last, metallic solution is poured into steel ingot.
Second step carries out hot rolling
With the stepped start-stop system gas-fired furnace steel ingot is carried out preheating, soaking and insulation successively first, and steel ingot was all stopped 28 minutes at preheating section, soaking zone and holding-zone respectively, make the steel ingot temperature reach 1150.
Afterwards, utilize the cross-arranging type five stand mill to become thickness to be the slab of 55mm square ingot roughing.
Afterwards, with five frame hot continuous mills slab finish rolling being become thickness is the torrid zone of 2.65mm.When tropical temperature is down to 800, with horizontal reel tropical hot rolling is become steel coil strip.
In the 3rd step, carry out pickling
First with 10 m/mins speed, make steel band by concentration be 15%, temperature is the acid storages of 60 degree, and steel band is carried out pickling, removes the iron scale of steel strip surface.
In the 4th step, carry out cold rolling
To be rolled into through the steel band of pickling the made-up belt that thickness is 1.5mm with four roller high-speed cold mills first.
Afterwards, be that the made-up belt of 1.5mm is put into continuous bright annealing furnace with thickness, under the protection of decomposed ammonia body, soften clean annealing.
Afterwards, will be rolled into through the made-up belt of softening annealing the work in-process steel band of 0.60mm with four roller high speed reversible precise cold milling trains.
Afterwards, the work in-process steel band is put into continuous bright annealing furnace, under the protection of decomposed ammonia body, carry out softening annealing.
At last, with six roller high speed reversible precise cold milling trains, will be rolled into through the 0.60mm of softening annealing work in-process steel band the steel band of 0.30mm, be high precision spring cold-rolled steel strip of the present invention.
Embodiment two
Choose first the iron and steel scrap of 94.98 weight parts, the molybdenum of 0.35 weight part, the niobium of 0.25 weight part and the vanadium of 0.20 weight part, stand-by.
The first step is smelted
First iron and steel scrap is toasted, remove moisture wherein.
Afterwards, moisture free iron and steel scrap is dropped in the intermediate frequency electric arc furnace, be smelted into metallic solution.
Afterwards, carry out the on-the-spot sample analysis row element adjustment of going forward side by side, the % by weight that makes following element in the metallic solution account for the metallic solution gross weight is respectively:
Carbon 0.66 % by weight
Silicon 1.90 % by weight
Manganese 0.90 % by weight
Phosphorus 0.005 % by weight
Sulphur 0.005 % by weight;
Chromium 0.35 % by weight;
Nickel 0.35 % by weight.
Afterwards, metallic solution is poured in the vacuum induction furnace, carried out degassedly when adding molybdenum, vanadium, niobium element, carry out refining.
At last, metallic solution is poured into steel ingot.
Second step carries out hot rolling
With the stepped start-stop system gas-fired furnace steel ingot is carried out preheating, soaking and insulation successively first, and steel ingot was all stopped 30 minutes at preheating section, soaking zone and holding-zone respectively, make the steel ingot temperature reach 1160.
Afterwards, utilize the cross-arranging type five stand mill to become thickness to be the slab of 60mm square ingot roughing.
Afterwards, with five frame hot continuous mills slab finish rolling being become thickness is the torrid zone of 2.70mm.When tropical temperature is down to 830, with horizontal reel tropical hot rolling is become steel coil strip.
In the 3rd step, carry out pickling
First with 13 m/mins speed, make steel band by concentration be 18%, temperature is the acid storages of 70 degree, and steel band is carried out pickling, removes the iron scale of steel strip surface.
In the 4th step, carry out cold rolling
To be rolled into through the steel band of pickling the made-up belt that thickness is 1.5mm with four roller high-speed cold mills first.
Afterwards, be that the made-up belt of 1.5mm is put into continuous bright annealing furnace with thickness, under the protection of decomposed ammonia body, soften clean annealing.
Afterwards, will be rolled into through the made-up belt of softening annealing the work in-process steel band of 0.60mm with four roller high speed reversible precise cold milling trains.
Afterwards, the work in-process steel band is put into continuous bright annealing furnace, under the protection of decomposed ammonia body, carry out softening annealing.
At last, with six roller high speed reversible precise cold milling trains, will be rolled into through the 0.60mm of softening annealing work in-process steel band the steel band of 0.30mm, be high precision spring cold-rolled steel strip of the present invention.
Embodiment three
Choose first the iron and steel scrap of 95.80 weight parts, the molybdenum of 0.30 weight part, the niobium of 0.20 weight part and the vanadium of 0.15 weight part, stand-by.
The first step is smelted
First iron and steel scrap is toasted, remove moisture wherein.
Afterwards, moisture free iron and steel scrap is dropped in the intermediate frequency electric arc furnace, be smelted into metallic solution.
Afterwards, carry out the on-the-spot sample analysis row element adjustment of going forward side by side, the % by weight that makes following element in the metallic solution account for the metallic solution gross weight is respectively:
Carbon 0.62 % by weight
Silicon 1.75 % by weight
Manganese 0.75 % by weight
Phosphorus 0.014 % by weight
Sulphur 0.016 % by weight;
Chromium 0.22 % by weight;
Nickel 0.18 % by weight.
Afterwards, metallic solution is poured in the vacuum induction furnace, carried out degassedly when adding molybdenum, vanadium, niobium element, carry out refining.
At last, metallic solution is poured into steel ingot.
Second step carries out hot rolling
With the stepped start-stop system gas-fired furnace steel ingot is carried out preheating, soaking and insulation successively first, and steel ingot was all stopped 32 minutes at preheating section, soaking zone and holding-zone respectively, make the steel ingot temperature reach 1170.
Afterwards, utilize the cross-arranging type five stand mill to become thickness to be the slab of 65mm square ingot roughing.
Afterwards, with five frame hot continuous mills slab finish rolling being become thickness is the torrid zone of 2.75mm.When tropical temperature is down to 850, with horizontal reel tropical hot rolling is become steel coil strip.
In the 3rd step, carry out pickling
First with 15 m/mins speed, make steel band by concentration be 20%, temperature is the acid storages of 80 degree, and steel band is carried out pickling, removes the iron scale of steel strip surface.
In the 4th step, carry out cold rolling
To be rolled into through the steel band of pickling the made-up belt that thickness is 1.5mm with four roller high-speed cold mills first.
Afterwards, be that the made-up belt of 1.5mm is put into continuous bright annealing furnace with thickness, under the protection of decomposed ammonia body, soften clean annealing.
Afterwards, will be rolled into through the made-up belt of softening annealing the work in-process steel band of 0.60mm with four roller high speed reversible precise cold milling trains.
Afterwards, the work in-process steel band is put into continuous bright annealing furnace, under the protection of decomposed ammonia body, carry out softening annealing.
At last, with six roller high speed reversible precise cold milling trains, will be rolled into through the 0.60mm of softening annealing work in-process steel band the steel band of 0.30mm, be high precision spring cold-rolled steel strip of the present invention.
Claims (2)
1. high precision spring cold-rolled steel strip is characterized in that comprising the raw material of following parts by weight:
94.98 ~ 96.53 parts of iron and steel scrap;
0.25 ~ 0.35 part of molybdenum;
0.15 ~ 0.25 part of niobium;
0.10 ~ 0.20 part of vanadium.
2. prepare the described high precision spring of claim 1 method of cold-rolled steel strip, it is characterized in that may further comprise the steps successively:
The first step is smelted
First iron and steel scrap is toasted, remove moisture wherein;
Afterwards, moisture free iron and steel scrap is dropped in the intermediate frequency electric arc furnace, be smelted into metallic solution;
Afterwards, carry out the on-the-spot sample analysis row element adjustment of going forward side by side, the % by weight that makes following element in the metallic solution account for the metallic solution gross weight is respectively:
Carbon 0.58 ~ 0.66 % by weight
Silicon 1.60 ~ 1.90 % by weight
Manganese 0.60 ~ 0.90 % by weight
Phosphorus 0.005 ~ 0.030 % by weight
Sulphur 0.005 ~ 0.030 % by weight;
Chromium 0.10 ~ 0.35 % by weight;
Nickel 0.12 ~ 0.35 % by weight;
Afterwards, metallic solution is poured in the vacuum induction furnace, carried out degassedly when adding molybdenum, vanadium, niobium element, carry out refining;
At last, metallic solution is poured into steel ingot;
Second step carries out hot rolling
With the stepped start-stop system gas-fired furnace steel ingot is carried out preheating, soaking and insulation successively first, and steel ingot was all stopped 28 ~ 32 minutes at preheating section, soaking zone and holding-zone respectively, make the steel ingot temperature reach 1150 ~ 1170;
Afterwards, utilizing the cross-arranging type five stand mill that square ingot roughing is become thickness is the slab of 55 ~ 65mm;
Afterwards, with five frame hot continuous mills slab finish rolling being become thickness is the torrid zone of 2.65 ~ 2.75mm; When tropical temperature is down to 800 ~ 850, with horizontal reel tropical hot rolling is become steel coil strip;
In the 3rd step, carry out pickling
First with 10 ~ 15 m/mins speed, make steel band by concentration be 15 ~ 20%, temperature is the acid storages of 60 ~ 80 degree, and steel band is carried out pickling, removes the iron scale of steel strip surface;
In the 4th step, carry out cold rolling
To be rolled into through the steel band of pickling the made-up belt that thickness is 1.5mm with four roller high-speed cold mills first;
Afterwards, be that the made-up belt of 1.5mm is put into continuous bright annealing furnace with thickness, under the protection of decomposed ammonia body, soften clean annealing;
Afterwards, will be rolled into through the made-up belt of softening annealing the work in-process steel band of 0.60mm with four roller high speed reversible precise cold milling trains;
Afterwards, the work in-process steel band is put into continuous bright annealing furnace, under the protection of decomposed ammonia body, carry out softening annealing;
At last, with six roller high speed reversible precise cold milling trains, will be rolled into through the 0.60mm of softening annealing work in-process steel band the steel band of 0.30mm, be high precision spring cold-rolled steel strip of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104164726A CN102994904A (en) | 2012-10-27 | 2012-10-27 | Cold-rolled strip for high-precision spring and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104164726A CN102994904A (en) | 2012-10-27 | 2012-10-27 | Cold-rolled strip for high-precision spring and production method thereof |
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| CN102994904A true CN102994904A (en) | 2013-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032228A (en) * | 2014-06-13 | 2014-09-10 | 无锡华生精密材料股份有限公司 | Elastic steel belt and production method thereof |
| CN106311789A (en) * | 2015-06-19 | 2017-01-11 | 常熟宝升精冲材料有限公司 | Fine blanking machining method for spring steel |
| CN111644926A (en) * | 2020-05-19 | 2020-09-11 | 马永会 | Efficient polishing method for ultrathin strip steel |
| US11340054B2 (en) | 2018-02-13 | 2022-05-24 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5732353A (en) * | 1980-08-05 | 1982-02-22 | Aichi Steel Works Ltd | Spring steel with superior wear resistance |
| CN102021491A (en) * | 2010-11-24 | 2011-04-20 | 东阳市中洲钢带有限公司 | Steel belt for high-elasticity ultrathin sole slice and production process thereof |
-
2012
- 2012-10-27 CN CN2012104164726A patent/CN102994904A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5732353A (en) * | 1980-08-05 | 1982-02-22 | Aichi Steel Works Ltd | Spring steel with superior wear resistance |
| CN102021491A (en) * | 2010-11-24 | 2011-04-20 | 东阳市中洲钢带有限公司 | Steel belt for high-elasticity ultrathin sole slice and production process thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032228A (en) * | 2014-06-13 | 2014-09-10 | 无锡华生精密材料股份有限公司 | Elastic steel belt and production method thereof |
| CN106311789A (en) * | 2015-06-19 | 2017-01-11 | 常熟宝升精冲材料有限公司 | Fine blanking machining method for spring steel |
| US11340054B2 (en) | 2018-02-13 | 2022-05-24 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
| US11566879B2 (en) | 2018-02-13 | 2023-01-31 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
| US11846503B2 (en) | 2018-02-13 | 2023-12-19 | Milwaukee Electric Tool Corporation | Tape measure with tear resistant tape blade edge |
| CN111644926A (en) * | 2020-05-19 | 2020-09-11 | 马永会 | Efficient polishing method for ultrathin strip steel |
| CN111644926B (en) * | 2020-05-19 | 2022-01-14 | 太原日德泰兴精密不锈钢股份有限公司 | Efficient polishing method for ultrathin strip steel |
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Application publication date: 20130327 |