CN105002434B - Vehicle clutch plate pairing steel sheet hot-strip and preparation method thereof - Google Patents
Vehicle clutch plate pairing steel sheet hot-strip and preparation method thereof Download PDFInfo
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- CN105002434B CN105002434B CN201510495857.XA CN201510495857A CN105002434B CN 105002434 B CN105002434 B CN 105002434B CN 201510495857 A CN201510495857 A CN 201510495857A CN 105002434 B CN105002434 B CN 105002434B
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Abstract
The invention discloses a kind of vehicle clutch plate pairing steel sheet hot-strip, chemical composition and mass percent are in steel：C：0.50~0.65%, Si：0.10~0.30%, Mn：0.70~1.10%, P≤0.015%, S≤0.005%, N≤0.006%, Cr：0.10~0.30%, Als：0.015~0.050%, Ni：0.10~0.30%, remaining is Fe and inevitable impurity；Without annealing heat-treats, hardness is less than 13HRC to product, and plate shape unevenness is less than 10mm/m.The invention also discloses the preparation method of this vehicle clutch plate pairing steel sheet hot-strip.Financial cost of the present invention is low, and hot-rolled product has good cold formability and plate shape size, excellent surface quality, simple production process.
Description
Technical field
The present invention relates to low-alloy structural steel manufacturing technology, in particular to a kind of vehicle clutch plate pairing steel sheet hot-rolled steel
Material and preparation method thereof.
Background technology
Vehicle clutch plate pairing steel sheet is the secondary important component of automotive friction, is one of easily worn part.Existing manufacturing procedure
Including punching steel disc, relatively flat, mill, then it is made by the Technology for Heating Processing of quenching+tempering.The building ring of clutch plate pairing steel sheet
Border and processing technology requirement base steel have good hardenability, wearability and anti-shear ability and anti-fatigue performance etc., but together
Shi Yaoqiu base steels have extremely low hardness, and more low better, generally below 15HRC before being heat-treated.In order to meet this
It is required that, current vehicle clutch plate pairing steel sheet material is generally using the 65Mn steel bands of annealed heat treatment.But annealing heat-treats
The high expensive of steel band.Current also paid pilot production hot rolling 65Mn material substitution annealing heat-treats steel bands, but hot rolled strip is hard
Degree is higher, usually above 19HRC, and steel band hardness is partially hard end to end, used after generally requiring heat treatment.
Authorization Notice No. discloses a kind of side for producing 65Mn hot rolled steel plates for the Chinese invention patent of CN101773930B
Method, the chemical composition that refining process carries out the molten steel after Alloying Treatment is：C：0.62~0.70%, Si：0.17~0.37%,
Mn：0.90~1.20%, P≤0.035%, S≤0.035%, Cr≤0.25%, Ni≤0.25%, remaining is Fe and can not keep away
The impurity exempted from；Steel band hardness, finishing temperature are reduced using the method for low temperature finish to gauge and high temperature coiling in steel band production process
It is 850~950 DEG C, coiling temperature is 550~650 DEG C, but the hardness of hot-rolled product is still 19~30HRC.Authorization Notice No. is
The Chinese invention patent of 103173598B discloses a kind of annealing-free medium-high carbon steel plate manufacturing process, in a kind of course of hot rolling
Line makes medium-high carbon steel plate directly soften, and saves the annealing operation after hot rolling, and the medium-high carbon steel plate of production can be real by high temperature coiling
Now part nodularization, its main production is controlled to less than 840 DEG C for entry temperature at finishing, finishing temperature control be 740 DEG C with
On, oiler temperature control is 650~700 DEG C.The hardness of product made from steel can be reduced to 80 from 93~105HRB by the technique~
85HRB.But as a result of zerolling, the load of production equipment is very big, the product particularly with carbon content higher than 0.50%,
Production difficulty is larger, and the plate shape of product is poor, it is difficult to meet the requirement of vehicle clutch plate pairing steel sheet.
Therefore it provides a kind of processing technology and performance requirement for meeting existing vehicle clutch plate pairing steel sheet, hot rolling are produced
Product are not required to through Overheating Treatment, the vehicle clutch plate pairing steel sheet hot-strip that hardness is low, financial cost is low and its manufacture method
Seem very necessary.
The content of the invention
A kind of weak point it is an object of the invention to overcome above-mentioned existing background technology, there is provided vehicle clutch plate antithesis
Steel disc hot-strip and preparation method thereof.
The purpose of the present invention is reached by following measure：A kind of vehicle clutch plate pairing steel sheet hot-strip,
Chemical composition and mass percent are in steel：C：0.50~0.65%, Si：0.10~0.30%, Mn：0.70~1.10%, P≤
0.015%, S≤0.005%, N≤0.006%, Cr：0.10~0.30%, Als：0.015~0.050%, Ni：0.10~
0.30%, remaining is Fe and inevitable impurity；Product is less than 13HRC, plate shape unevenness without annealing heat-treats, hardness
Less than 10mm/m.
Preferably, chemical composition and mass percent are in steel：C：0.55~0.63%, Si：0.19~0.30%, Mn：
0.92~1.10%, P≤0.012%, S≤0.005%, N≤0.006%, Cr：0.10~0.30%, Als：0.015~
0.025%, Ni：0.10~0.20%, remaining is Fe and inevitable impurity.
Further, chemical composition and mass percent are in steel：C：0.63%, Si：0.30%, Mn：1.08%, P：
0.007%, S：0.005%, N：0.003%, Cr：0.16%, Als：0.015%, Ni：0.11%, remaining is Fe and can not keep away
The impurity exempted from.
The effect in the present invention of the main chemical elements and its percentage composition of present invention selection is as follows：
C：Carbon mainly plays solution strengthening effect in steel, improves the hardness and hardenability of steel, and carbon content is too low, at heat
Hardness is too low after reason, and steel is too soft.Carbon content is too high, and steel hardness is too high, and increases production process difficulty.Therefore carbon content exists
0.50~0.65%, it is preferable that C content selection is 0.55%~0.63%.
Si：Si plays solution strengthening effect in steel, and content is too low, and invigoration effect is too small, and minimum Si contents are 0.10%, Si
Too high levels, easily form Fe in product surface2SiO4, surface defect is caused, therefore most high Si content is 0.30%.
Mn：Mn plays solution strengthening effect in steel, improves the hardness and quenching degree of steel, and Mn contents are too low, invigoration effect
It is too small, therefore minimum Mn contents are that 0.70%, Mn too high levels easily cause central segregation of slab in casting process, reduce material
The performance of material, therefore most high Mn content is 1.10%.
P：P is the impurity element in steel, it is easy in Grain Boundary Segregation, influence the toughness of product, therefore its content is more low better.
According to actual controlled level, should control below 0.015%.
S：S is the impurity element in steel, easily produces segregation in crystal boundary, reduces the toughness of steel, should fully be removed during steel-making,
Should ensure that its value is less than 0.005%.
N：N is the impurity element in steel, reduces the toughness of steel, it is easy to Al, Ti formation AlN and TiN, too high levels, easily
Thick TiN is formed, therefore reduces its content as far as possible, its value should be less than 0.006%.
Cr：Cr can improve the quenching degree of steel, be conducive to improving the hardness and wearability of steel, and Stable Carbon is formed in steel
Compound, in tempering and annealing process, plays a part of stabilization steel hardness, and minimum is 0.10% in the present invention, but Cr contains
Amount is too high to easily cause steel excessive high hardness, and toughness declines, therefore peak is 0.30%.
Al：Al is combined in steel with O, primarily serves the effect of deoxidation, therefore minimum content is 0.015%, Al content mistake
The continuous casting that easily formed high is difficult, therefore highest content is 0.050%.
Ni：Ni can improve the quenching degree of steel, be conducive to improving the hardness of steel, and minimum is 0.10% in the present invention,
But Ni too high levels easily cause steel excessive high hardness, toughness declines, therefore peak is 0.30%.
In addition to containing above-mentioned chemical composition, remaining is Fe and inevitable impurity to steel of the present invention.
The preparation method of above-mentioned vehicle clutch plate pairing steel sheet hot-strip, comprises the following steps：
1) smelting, refining, application of vacuum and continuous casting：During continuous-casting steel pouring, the degree of superheat of molten steel is controlled to 15~25 DEG C, continuous casting
Base thickness control is 50~60mm；
2) heat：Heating stepses 1) obtained by strand, strand charging temperature is controlled to 900~1100 DEG C, tapping temperature control
1180 DEG C~1250 DEG C are made as, strand time inside furnace is controlled to 20~50min；
3) controlled rolling：To step 2) in the strand of gained carry out roughing and finish rolling, the first passage of finish rolling and the second passage
Total reduction is more than 95%, and finishing temperature control is 920~960 DEG C；
4) control cold：To step 3) in the steel plate of gained carry out control cold treatment, using section cooling, steel band it is not cold end to end
But, the length that steel band is not cooled down end to end is all higher than 50m, cooldown rate≤25 DEG C/s, coolant water temperature >=20 DEG C；
5) batch：To step 4) in the steel plate of gained batch treatment, oiler temperature control is 680 DEG C~760 DEG C；
6) slow cooling：To step 5) in gained coil of strip carry out slow cooling treatment, temperature retention time is controlled to 48~72h；
7) it is smooth：To step 6) in the coil of strip of gained carry out smooth treatment, smooth elongation control is 0.5%~2%, i.e.,
Obtain vehicle clutch plate pairing steel sheet hot-strip.
Preferably, step 1) in, the degree of superheat of molten steel is controlled to 15~20 DEG C, and thickness of strand is controlled to 50~55mm.
Further, step 2) in, 950~1050 DEG C of strand charging temperature, 1180~1220 DEG C of tapping temperature, strand exists
Stove time control is 25~35min.
Yet further, step 3) in, finishing temperature control is 920~940 DEG C.
Further, step 5) in, oiler temperature control is 690~730 DEG C.
The advantage of the invention is that：
First, Steel Properties index of the present invention meets product hardness less than 13HRC, plate shape unevenness is less than 10mm/m；
Second, product of the present invention can meet the processing technology and performance requirement of existing vehicle clutch plate pairing steel sheet, and heat
Roll product to be not required to by annealing heat-treats, hot-rolled product has good cold formability and plate shape size, excellent surface quality；
Third, simple production process of the present invention, low production cost.
Specific embodiment
Performance of the invention is described in detail with reference to embodiment, but they do not constitute limitation of the invention,
It is only for example.Will become clearer and be readily appreciated that by illustrating advantages of the present invention simultaneously.
Table 1 is that embodiment 1~6 is chemical composition and percentage by weight in vehicle clutch plate pairing steel sheet hot-strip,
Comparative example 1~3 is chemical composition and percentage by weight in compared steel, and remaining is Fe and inevitable impurity.
The chemical composition and percentage by weight (wt%) of the various embodiments of the present invention of table 1 and comparative example
By the chemical composition through smelting, refining, the heated slab that obtains after application of vacuum and continuous casting, controlled rolling, control it is cold,
Batch, slow cooling and it is smooth after obtain vehicle clutch plate pairing steel sheet hot-strip.Specific main technologic parameters such as following table：
The main technologic parameters list (one) of the various embodiments of the present invention of table 2
The main technologic parameters list (two) of the various embodiments of the present invention of table 3
Above-described embodiment performance parameter is as shown in the table：
The results of property list of the various embodiments of the present invention of table 4 and comparative example
As can be seen from Table 4：The product steel performance of the embodiment of the present invention 1~6 is good, and it is low that Steel Properties index meets product hardness
In 13HRC, plate shape unevenness is less than 10mm/m；The processing technology and performance that existing vehicle clutch plate pairing steel sheet can be met will
Ask, and hot-rolled product excellent surface quality.
Other parts not being described in detail are prior art.
Claims (8)
1. a kind of vehicle clutch plate pairing steel sheet hot-strip, it is characterised in that：Chemical composition and mass percent are in steel：
C：0.50~0.65%, Si：0.10~0.30%, Mn：0.70~1.10%, P≤0.015%, S≤0.005%, N≤
0.006%, Cr：0.10~0.30%, Als：0.015~0.050%, Ni：0.10~0.30%, remaining is for Fe and unavoidably
Impurity；Without annealing heat-treats, hardness is less than 13HRC to product, and plate shape unevenness is less than 10mm/m；
Its preparation method, comprises the following steps：
1) smelting, refining, application of vacuum and continuous casting：During continuous-casting steel pouring, the degree of superheat of molten steel is controlled to 15~25 DEG C, and continuous casting billet is thick
Degree is controlled to 50~60mm；
2) heat：Heating stepses 1) obtained by strand, strand charging temperature is controlled to 900~1100 DEG C, and tapping temperature is controlled to
1180 DEG C~1250 DEG C, strand time inside furnace is controlled to 20~50min；
3) controlled rolling：To step 2) in gained strand carry out roughing and finish rolling, the first passage of finish rolling and the stagnation pressure of the second passage
Lower rate is more than 95%, and finishing temperature control is 920~960 DEG C；
4) control cold：To step 3) in the steel plate of gained carry out control cold treatment, using section cooling, steel band is not end to end cooled down, steel
The length that band is not cooled down end to end is all higher than 50m, cooldown rate≤25 DEG C/s, coolant water temperature >=20 DEG C；
5) batch：To step 4) in the steel plate of gained batch treatment, oiler temperature control is 680 DEG C~760 DEG C；
6) slow cooling：To step 5) in gained coil of strip carry out slow cooling treatment, temperature retention time is controlled to 48~72h；
7) it is smooth：To step 6) in the coil of strip of gained carry out smooth treatment, smooth elongation control is 0.5%~2%, that is, obtain
Vehicle clutch plate pairing steel sheet hot-strip.
2. vehicle clutch plate pairing steel sheet hot-strip according to claim 1, it is characterised in that：Chemical composition in steel
And mass percent is：C：0.55~0.63%, Si：0.19~0.30%, Mn：0.92~1.10%, P≤0.012%, S≤
0.005%, N≤0.006%, Cr：0.10~0.30%, Als：0.015~0.025%, Ni：0.10~0.20%, remaining is
Fe and inevitable impurity.
3. vehicle clutch plate pairing steel sheet hot-strip according to claim 1, it is characterised in that：Chemical composition in steel
And mass percent is：C：0.63%, Si：0.30%, Mn：1.08%, P：0.007%, S：0.005%, N：0.003%, Cr：
0.16%, Als：0.015%, Ni：0.11%, remaining is Fe and inevitable impurity.
4. the preparation method of the vehicle clutch plate pairing steel sheet hot-strip described in a kind of claim 1, it is characterised in that：Bag
Include following steps：
1) smelting, refining, application of vacuum and continuous casting：During continuous-casting steel pouring, the degree of superheat of molten steel is controlled to 15~25 DEG C, and continuous casting billet is thick
Degree is controlled to 50~60mm；
2) heat：Heating stepses 1) obtained by strand, strand charging temperature is controlled to 900~1100 DEG C, and tapping temperature is controlled to
1180 DEG C~1250 DEG C, strand time inside furnace is controlled to 20~50min；
3) controlled rolling：To step 2) in gained strand carry out roughing and finish rolling, the first passage of finish rolling and the stagnation pressure of the second passage
Lower rate is more than 95%, and finishing temperature control is 920~960 DEG C；
4) control cold：To step 3) in the steel plate of gained carry out control cold treatment, using section cooling, steel band is not end to end cooled down, steel
The length that band is not cooled down end to end is all higher than 50m, cooldown rate≤25 DEG C/s, coolant water temperature >=20 DEG C；
5) batch：To step 4) in the steel plate of gained batch treatment, oiler temperature control is 680 DEG C~760 DEG C；
6) slow cooling：To step 5) in gained coil of strip carry out slow cooling treatment, temperature retention time is controlled to 48~72h；
7) it is smooth：To step 6) in the coil of strip of gained carry out smooth treatment, smooth elongation control is 0.5%~2%, that is, obtain
Vehicle clutch plate pairing steel sheet hot-strip.
5. the preparation method of vehicle clutch plate pairing steel sheet hot-strip according to claim 4, it is characterised in that：Institute
State step 1) in, the degree of superheat of molten steel is controlled to 15~20 DEG C, and thickness of strand is controlled to 50~55mm.
6. the preparation method of vehicle clutch plate pairing steel sheet hot-strip according to claim 4, it is characterised in that：Institute
State step 2) in, 950~1050 DEG C of strand charging temperature, 1180~1220 DEG C of tapping temperature, strand time inside furnace is controlled to 25
~35min.
7. the preparation method of vehicle clutch plate pairing steel sheet hot-strip according to claim 4, it is characterised in that：Institute
State step 3) in, finishing temperature control is 920~940 DEG C.
8. the preparation method of vehicle clutch plate pairing steel sheet hot-strip according to claim 4, it is characterised in that：Institute
State step 5) in, oiler temperature control is 690~730 DEG C.
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| CN105543646A (en) * | 2015-12-15 | 2016-05-04 | 安徽楚江特钢有限公司 | Production process for medium-high carbon steel through thin slabs |
| CN105624561A (en) * | 2015-12-28 | 2016-06-01 | 华南理工大学 | High-performance Nb-microalloyed alloy steel for dual steel discs of vehicle clutch |
| CN106544485B (en) * | 2016-11-08 | 2018-07-03 | 武汉钢铁有限公司 | The manufacturing method of thin slab continuous casting and rolling great surface quality medium and high carbon steel |
| CN108425067A (en) * | 2018-05-09 | 2018-08-21 | 舞阳钢铁有限责任公司 | The big high-quality carbon mould steel plate of thickness and its production method |
| CN109023115B (en) * | 2018-09-29 | 2020-01-31 | 武汉钢铁有限公司 | hot-rolled template pull sheet steel and manufacturing method thereof |
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| CN103143563A (en) * | 2013-04-03 | 2013-06-12 | 河北联合大学 | Method for preventing 65 Mn hot rolled steel coil from collapsing by phase-change thermal expansion |
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| JPS5993834A (en) * | 1982-11-17 | 1984-05-30 | Kawasaki Steel Corp | Manufacture of cold rolled steel sheet with superior press formability |
| CN103614628B (en) * | 2013-12-12 | 2016-03-30 | 首钢总公司 | A kind of 65MnTiB steel and hot-rolled steel sheet manufacture method thereof |
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|---|---|---|---|---|
| CN1506174A (en) * | 2002-12-12 | 2004-06-23 | 鞍山钢铁集团公司 | Winding method for hot rolled steel strip |
| CN101773930A (en) * | 2010-01-21 | 2010-07-14 | 广州珠江钢铁有限责任公司 | Method for producing 65Mn hot rolled steel plate |
| CN102912101A (en) * | 2012-10-19 | 2013-02-06 | 攀钢集团成都钢钒有限公司 | Production process of 65 Mn spring steel wire rod and 65 Mn spring steel wire rod |
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Effective date of registration: 20170731 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 15 Wuchang, Wuhan Friendship Avenue, No. 999, block A, layer (Wuhan Iron and steel science and technology innovation department), No. 430080, Patentee before: Wuhan Iron & Steel (Group) Corp. |