CN102586675B - Ultra-high strength package binding band with tensile strength more than or equal to 1250MPa, and manufacturing method of package binding band - Google Patents
Ultra-high strength package binding band with tensile strength more than or equal to 1250MPa, and manufacturing method of package binding band Download PDFInfo
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- CN102586675B CN102586675B CN 201210088478 CN201210088478A CN102586675B CN 102586675 B CN102586675 B CN 102586675B CN 201210088478 CN201210088478 CN 201210088478 CN 201210088478 A CN201210088478 A CN 201210088478A CN 102586675 B CN102586675 B CN 102586675B
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Abstract
The invention belongs to the field of steel for a binding band, and particularly relates to an ultra-high strength package binding band with the tensile strength more than or equal to 1250MPa, and a manufacturing method of the package binding band. The invention is characterized in that the ultra-high strength package binding band is ultra-high strength alloy steel which comprises the components by weight percent: 0.15-0.45% of C, 0.25-1.80% of Si, 1.0-2.5% of Mn and the balance Fe and unavoidable impurities. By adopting the alloy steel raw material with the chemical components and controlling the working procedure of continuous heat treatment in the production process, the tensile strength and the elongation of the package binding band are greatly improved, wherein the tensile strength of the package binding band is more than 1250MPa, and the elongation of the package binding band is more than 12%, so that the industrial requirements on the ultra-high strength package binding band are fully met.
Description
Technical field
The invention belongs to tie and use the rings territory, particularly the superelevation of a kind of tensile strength 〉=1250MPa is packed tie and manufacture method by force.
Background technology
Use the rings territory at tie,, guarantee Package Quality, satisfy the requirement of various industries, continually develop out high strength tie steel and manufacturing technology in order to improve the service efficiency of steel.
It is that 0.20%-0.25%, manganese content are that 0.30%-0.60%, boron are the aluminium killed steel of 1.07-1.43 with the ratio of free nitrogen that CN95103707.2 adopts carbon content, 600 ℃ of coiling temperatures, cold rolling draft about 80%, the tie steel tensile strength of making is 880-1090MPa, unit elongation is not more than 4%, and this tie need carry out zinc-plated processing; This hardness of steel is on the low side, unit elongation is not enough, and needs zinc-plated processing, complex process;
It is that 0.22%-0.29%, manganese content are the chill steel band of 1.3%-1.5%, aluminium content 〉=0.015%, content of niobium 〉=0.012% that CN02109635.X adopts carbon content, after 450-550 ℃ of processing, can make the tie steel of tensile strength 〉=920MPa, unit elongation 〉=11%; This hardness of steel is lower;
US20030034100, CN03104312.7 adopt carbon content＜0.2%, manganese content is that 0.8%-1.2%, silicone content are that 0.2%-0.4%, titanium content are that 0.025%-0.045%, content of vanadium are the steel of 0.05%-0.07%, finishing temperature is 900 ℃, coiling temperature is 570 ℃, be rolled into 0.8mm through 60% cold rolling draft, be quickly cooled to room temperature after being heated to two-phase region, the tie steel tensile strength of making is 970-1070MPa, unit elongation A
50Be 10-14%; This hardness of steel is on the low side;
It is that 0.15%-0.28%, silicone content are that 0.005%-0.07%, manganese content are the chill steel band of 1.2%-1.7% that CN200410031162.8 adopts carbon content, after 400-600 ℃ of processing, can make the tie steel of tensile strength 〉=930MPa, unit elongation 〉=8%; This hardness of steel is lower, the unit elongation deficiency;
It is that 0.11%-0.17%, silicone content are that 0%-0.05%, manganese content are the chill steel band of 0.25%-0.55% that CN200910300597 adopts carbon content, after 380-420 ℃ of processing, can make the tie steel of tensile strength 〉=800MPa, unit elongation 〉=10%;
It is that 0.25%-0.42%, silicone content are not more than 0.45%, manganese content is the chill steel band of 1.0%-2.0% that CN200910045451.6 adopts carbon content, after 430-580 ℃ of blue annealing, can make the tie steel of tensile strength 〉=1000MPa; This hardness of steel is lower;
It is that 0.25%-0.35%, Mn content are that 1.0-2.0, Si are not more than 0.4% steel that CN200910046229.8 adopts carbon content, through hot rolling, cold rolling after, adopt ferrite+austenite two-phase region to quench rapidly+the tempered thermal treatment process, can make the tie steel of tensile strength 〉=1100MPa, unit elongation 〉=10%; This hardness of steel, unit elongation is on the low side;
US20070235112 provides a kind of cold rolling fully hard matter tie steel and manufacture method thereof, the chemical ingredients of steel is: carbon 0.02%-0.25%, manganese 0.15%-1.5%, aluminium 0.01%-0.12%, nitrogen 0.04%-0.03%, copper 0.04%-0.50%, nickel 0.03%-0.25%, molybdenum 0.02%-0.25%, chromium 0.03%-0.25%, silicon are not more than 0.25%, and tie steel tensile strength is about 900MPa; This hardness of steel is lower;
EP14288295 adopts C-Mn-Si steel lead patenting technology, and production tensile strength is 1170-1240 MPa, and unit elongation is 6.5% tie steel; This hardness of steel is on the low side, the unit elongation deficiency;
US5542995 adopts that C is 0.56%, the AISI1055 bar of Mn0.70%, is rolled into flat tie, and tensile strength can reach 1170MPa, and unit elongation is 5%, and this technology manufacturing process complexity, dimensional precision are difficult to guarantee.
Conclusion is got up, and at present the main production of high strength tie steel has four kinds: the one, carry out annealed technology after adopting cold rolling reinforcement, and make full use of cold rolling work hardening; The 2nd, the bainite reinforcing process of employing lead patenting, but its equipment complexity particularly adopt lead bath to handle, and can cause serious environmental to pollute, and some countries have limited use; The 3rd, the martensite strengthening technology that adopts two-phase region to quench can adopt water as quenchant, non-environmental-pollution; The 4th, adopt rod hot rolling to become flat material technology.But above-mentioned technology can't make that tensile strength reaches 1250 MPa, unit elongation reaches 12% the strong tie steel of superelevation, can't satisfy the requirements at the higher level that textile industry proposes the raw material packet packing quality.
Summary of the invention
The purpose of this invention is to provide the superelevation that a kind of tensile strength reaches more than 1250 MPa, unit elongation reaches more than 12% and pack tie and manufacture method by force.
The objective of the invention is to realize by following technical proposals:
The superelevation of tensile strength 〉=1250MPa of the present invention is packed tie by force, it is characterized in that: the strong tie of described superelevation is the strong steel alloy of superelevation that comprises following component: C:0.15%-0.45%, Si:0.25%-1.80%, Mn:1.0%-2.5%, all the other are iron and unavoidable impurities, and described percentage ratio is weight percentage.
The strong steel alloy of described superelevation also comprises following component: Cr:0.05%-1.00%, one or both among the Mo:0.01%-0.50%.
The strong steel alloy of described superelevation comprises following component C:0.45%, Si:1%, Mn:1%, Cr:0.2%.
Described steel alloy comprises following component C:0.26%, Si:1.4%, Mn:2%, Mo:0.5%.
The thickness of the strong tie of described superelevation is 0.5-2.5mm.
The level superelevation of tensile strength 〉=1250MPa of the present invention is packed the manufacture method of tie by force, comprise that mainly the hot-rolled sheet coil of selecting the strong steel alloy of superelevation for use is a raw material, through slitting, pickling, send into process furnace behind the cold rolling one-tenth steel band and carry out continuous heat treatment, it is characterized in that: described continuous heat treatment, steel band is heated between 750 ℃ of-950 ℃ of temperature, soaking time 0-200s, adopt heat-eliminating medium to be cooled to 200 ℃-500 ℃ with the speed of cooling of 〉=15 ℃/s, soaking time 0-300 s, air cooling or pressure are cooled to below 160 ℃, air cooling or shrend are cooled to room temperature, and the room temperature texture of steel is a martensite after the continuous heat treatment, ferrite, austenite, in the bainite two or more.
Preferably the present invention is when continuous heat treatment, described continuous processing thermal recovery reheat technology, steel band is heated between 750 ℃ of-950 ℃ of temperature, soaking time 0-200s adopts heat-eliminating medium to be cooled to 200 ℃-500 ℃ with the speed of cooling of 〉=15 ℃/s, behind the soaking time 0-300 s, again steel band is heated between the 250-500 ℃ of temperature, soaking time 0-600 s, air cooling or pressure are cooled to below 160 ℃, and air cooling or shrend are cooled to room temperature.
Martensitic percent by volume is not less than 70% in the described room temperature texture, and austenitic percent by volume is not less than 5%.
Martensitic percent by volume is not less than 50% in the described room temperature texture, and ferritic percent by volume is not less than 30%.
Heat-eliminating medium during continuous heat treatment of the present invention adopts in bathing one or both of nitrogen, hydrogen, nitrogen and hydrogen mixture, aerosol, shrend, oil quenching, lead and lead alloy bath, tin and tin alloy to cool off.
Carbon is most economical in the steel, topmost alloying element, and is all very big to the final tissue and the intensity effect of steel, can obviously improve the hardening capacity and the hardenability of steel.If carbon content is low excessively, when becoming martensite, austenitic transformation can not produce enough distortion to strengthen martensite, the undercapacity of steel plate; But too high carbon content has a negative impact to plasticity, toughness, weldability.Therefore its content range is 0.15%-0.45%.
Manganese is displaced type solution strengthening element, can change austenite transformation temperature, helps obtaining tiny phase-change product, improves the hardening capacity of steel, and the content range of manganese is respectively 1.0%-2.5%
Silicon is the solution strengthening element, can change austenite transformation temperature, can also suppress cementite and separate out stable austenite; But too high silicon can make the oxide film of surface of steel plate be difficult to remove, and the content range of silicon is respectively 0.25%-1.80%.
In order to improve hardening capacity, can also add chromium, chromium can also play the solution strengthening effect and improve the solidity to corrosion of steel.The scope of chromium is respectively 0.05%-1.00%.
The adding of molybdenum can improve hardening capacity, improves the stability of steel simultaneously, and its content range is 0.01%-0.50%.
When Heating temperature was lower than 750 ℃, the steel Ovshinskyization was insufficient, and austenite content is low excessively in the steel, and the intensity of cooling back steel is lower, and when Heating temperature was higher than 950 ℃, cost increased.When Heating temperature is higher, can suitably reduce soaking time, but soaking time is when long, facility investment is higher.Speed of cooling is during less than 15 ℃/s, and martensite content is low excessively in the steel, and the intensity of steel is lower.When cooling temperature is lower than 200 ℃, austenite, ferrite content are low excessively in the steel, the unit elongation of steel is lower, when cooling temperature is higher than 500 ℃, martensite content is lower in the steel, the undercapacity of steel, and suitable soaking time helps improving the unit elongation of steel, but when soaking time was long, the strength degradation of steel was more.
The invention has the beneficial effects as follows:
Because the present invention has adopted new alloy steel grade in process of production, increased substantially the obdurability of steel, pack tie by force by the continuous heating superelevation that treatment process produces of turning blue, its mechanical property: tensile strength is more than 1250 MPa, unit elongation is more than 12%, meet the requirement that industrial superelevation is packed tie by force fully, and technology is simple, satisfy the demand of wool, cotton packing fully, have broad prospect for its application high strength, high tenacity.
Embodiment
Specify of the present invention below in conjunction with embodiment.
Embodiment
Choose down the steel alloy of component (wt%) in the tabulation 1 and the mechanical property that is reached, corresponding thermal treatment process is as shown in table 2.
Table 1 chemical ingredients and mechanical property
| Sequence number | C | Si | Mn | Cr | Mo | Tensile strength/N/mm 2 | Unit elongation/% |
| 1 | 0.15 | 1 | 2.5 | 1300 | 13 | ||
| 2 | 0.25 | 1.8 | 2 | 1350 | 14 | ||
| 3 | 0.35 | 1.5 | 2 | 1380 | 13 | ||
| 4 | 0.45 | 0.5 | 2 | 1400 | 14 | ||
| 5 | 0.45 | 1 | 1 | 0.2 | 1400 | 12 | |
| 6 | 0.15 | 1 | 2.5 | 0.5 | 1300 | 14 | |
| 7 | 0.25 | 1 | 1.8 | 0.05 | 0.01 | 1500 | 14 |
| 8 | 0.15 | 0.25 | 2.5 | 0.5 | 0.2 | 1350 | 12 |
| 9 | 0.15 | 1 | 2.5 | 0.5 | 1360 | 13 | |
| 10 | 0.28 | 1.2 | 2 | 1 | 1350 | 16 | |
| 11 | 0.26 | 1.4 | 2 | 0.5 | 1500 | 12 | |
| 12 | 0.24 | 1.6 | 2 | 1 | 0.5 | 1250 | 14 |
| 13 | 0.22 | 1.8 | 2 | 0.1 | 0.1 | 1300 | 13 |
| 14 | 0.2 | 0.5 | 2 | 0.5 | 1250 | 14 |
Table 2 heat treatment process parameter that turns blue
| Sequence number | Heating temperature, ℃ | Soaking time, s | Speed of cooling, ℃/s | Heat-eliminating medium | Cooling temperature, ℃ | Soaking time, s | The reheat temperature, ℃ | Soaking time, s | Speed of cooling, ℃/s |
| 1 | 950 | 0 | 15 | N 2 | 200 | 300 | |||
| 2 | 900 | 100 | 25 | N 2+5%H 2 | 300 | 0 | 15 | ||
| 3 | 850 | 50 | 50 | Aerosol | 350 | 200 | |||
| 4 | 800 | 200 | 500 | Shrend | 200 | 100 | 350 | 300 | 15 |
| 5 | 850 | 120 | 100 | Tin bath | 300 | 60 | 15 | ||
| 6 | 900 | 60 | 50 | Oil quenching | 200 | 10 | 250 | 600 | 15 |
| 7 | 900 | 120 | 100 | Tin bath | 250 | 60 | |||
| 8 | 750 | 200 | 25 | N 2+10%H 2 | 450 | 3 | 25 | ||
| 9 | 900 | 60 | 35 | N 2+30%H 2 | 250 | 60 | 300 | 5 | 25 |
| 10 | 850 | 30 | 25 | N 2+10%H 2 | 200 | 60 | 400 | 60 | 25 |
| 11 | 900 | 60 | 35 | N 2+30%H 2 | 300 | 60 | 15 | ||
| 12 | 900 | 60 | 35 | N 2+30%H 2 | 300 | 60 | 400 | 60 | 15 |
| 13 | 900 | 60 | 25 | N 2+10%H 2 | 200 | 60 | 300 | 180 | 25 |
| 14 | 750 | 100 | 35 | N 2+30%H 2 | 200 | 5 | 500 | 10 | 35 |
Through the steel of above-mentioned processing, air cooling or pressure subsequently is cooled to below 160 ℃, and air cooling or shrend are cooled to room temperature.
Martensitic percent by volume is not less than 70% in the described room temperature texture, and austenitic percent by volume is not less than 5%, but a spot of ferrite of intrinsic energy and/or bainite in addition.
Martensitic percent by volume is not less than 50% in the described room temperature texture, and ferritic percent by volume is not less than 30%, but a spot of austenite of intrinsic energy and/or bainite in addition.
Heat-eliminating medium during continuous heat treatment of the present invention adopts in bathing one or both of nitrogen, hydrogen, nitrogen and hydrogen mixture, aerosol, shrend, oil quenching, lead and lead alloy bath, tin and tin alloy to cool off.
From embodiment as can be seen, the present invention adopts the steel alloy raw material of above-mentioned chemical composition, and by controlling the continuous heat treatment operation in process of production, the tensile strength and the unit elongation of packing tie have been improved greatly, the tensile strength of its packing tie is all above 1250 MPa, unit elongation surpasses 12%, meets the requirement that industrial superelevation is packed tie by force fully.
Claims (8)
1. the superelevation of a tensile strength 〉=1250MPa, unit elongation 〉=12% manufacture method of packing tie by force, comprise that mainly the hot-rolled sheet coil of selecting the strong steel alloy of superelevation for use is raw material, sends into process furnace carry out continuous heat treatment behind slitting, pickling, cold rolling one-tenth steel band, it is characterized in that: the strong tie of described superelevation is the strong steel alloy of superelevation that comprises following component: C:0.15%-0.45%, Si:0.50%-1.80%, Mn:1.0%-2.5%, all the other are iron and unavoidable impurities, and described percentage ratio is weight percentage; The thickness that described superelevation is packed tie by force is 0.5-2.5mm; Described continuous heat treatment, steel band is heated between 750 ℃ of-950 ℃ of temperature, soaking time 0-200s, adopt heat-eliminating medium to be cooled to 200 ℃-500 ℃ with the speed of cooling of 〉=15 ℃/s, soaking time 0-300 s, air cooling or pressure are cooled to below 160 ℃, and air cooling or shrend are cooled to room temperature, and the room temperature texture of steel is two or more in martensite, ferrite, austenite, the bainite after the continuous heat treatment; Heat-eliminating medium during described continuous heat treatment adopts in bathing one or both of nitrogen, hydrogen, nitrogen and hydrogen mixture, aerosol, shrend, oil quenching, lead and lead alloy bath, tin and tin alloy to cool off.
2. the manufacture method that the superelevation of tensile strength 〉=1250MPa according to claim 1, unit elongation 〉=12% is packed tie by force, it is characterized in that the strong steel alloy of described superelevation also comprises following component: Cr:0.05%-1.00%, among the Mo:0.01%-0.50% one or both, described percentage ratio are weight percentage.
3. the manufacture method that the superelevation of tensile strength 〉=1250MPa according to claim 1 and 2, unit elongation 〉=12% is packed tie by force, it is characterized in that: martensitic percent by volume is not less than 70% in the room temperature texture of described tie, and austenitic percent by volume is not less than 5%.
4. the manufacture method that the superelevation of tensile strength 〉=1250MPa according to claim 1 and 2, unit elongation 〉=12% is packed tie by force, it is characterized in that: martensitic percent by volume is not less than 50% in the room temperature texture of described tie, and ferritic percent by volume is not less than 30%.
5. the superelevation of a tensile strength 〉=1250MPa, unit elongation 〉=12% manufacture method of packing tie by force, comprise that mainly the hot-rolled sheet coil of selecting the strong steel alloy of superelevation for use is raw material, sends into process furnace carry out continuous heat treatment behind slitting, pickling, cold rolling one-tenth steel band, it is characterized in that: the strong tie of described superelevation is the strong steel alloy of superelevation that comprises following component: C:0.15%-0.45%, Si:0.50%-1.80%, Mn:1.0%-2.5%, all the other are iron and unavoidable impurities, and described percentage ratio is weight percentage; The thickness that described superelevation is packed tie by force is 0.5-2.5mm; Described continuous heat treatment, steel band is heated between 750 ℃ of-950 ℃ of temperature, soaking time 0-200s, adopt heat-eliminating medium to be cooled to 200 ℃-500 ℃ with the speed of cooling of 〉=15 ℃/s, soaking time 0-300 s, again steel band is heated between the 250-500 ℃ of temperature, soaking time 0-600 s, air cooling or pressure are cooled to below 160 ℃, air cooling or shrend are cooled to room temperature, and the room temperature texture of steel is two or more in martensite, ferrite, austenite, the bainite after the continuous heat treatment; Heat-eliminating medium during described continuous heat treatment adopts in bathing one or both of nitrogen, hydrogen, nitrogen and hydrogen mixture, aerosol, shrend, oil quenching, lead and lead alloy bath, tin and tin alloy to cool off.
6. the manufacture method that the superelevation of tensile strength 〉=1250MPa according to claim 5, unit elongation 〉=12% is packed tie by force, it is characterized in that the strong steel alloy of described superelevation also comprises following component: Cr:0.05%-1.00%, among the Mo:0.01%-0.50% one or both, described percentage ratio are weight percentage.
7. the manufacture method of packing tie by force according to the superelevation of claim 5 or 6 described tensile strength 〉=1250MPa, unit elongation 〉=12%, it is characterized in that: martensitic percent by volume is not less than 70% in the room temperature texture of described tie, and austenitic percent by volume is not less than 5%.
8. the manufacture method of packing tie by force according to the superelevation of claim 5 or 6 described tensile strength 〉=1250MPa, unit elongation 〉=12%, it is characterized in that: martensitic percent by volume is not less than 50% in the room temperature texture of described tie, and ferritic percent by volume is not less than 30%.
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| CN103757530B (en) * | 2014-01-24 | 2016-08-24 | 宝山钢铁股份有限公司 | The thin strap continuous casting economy ultra-high strength package binding band of tensile strength >=1250MPa and manufacture method thereof |
| CN103805853B (en) * | 2014-03-05 | 2016-03-16 | 武汉钢铁(集团)公司 | A kind of high-strength hot-dip zinc-coated tie and production method thereof |
| CN104097848B (en) * | 2014-07-25 | 2016-04-06 | 武汉钢铁(集团)公司 | A kind of production method of high-strength corrosion-resisting Pb-Sn composite deposite tie |
| CN104745785B (en) * | 2015-04-14 | 2017-06-13 | 武汉钢铁(集团)公司 | A kind of production method of superhigh intensity heat-proof corrosion-resistant tie |
| CN104878178B (en) * | 2015-05-08 | 2017-06-13 | 武汉钢铁江北集团有限公司 | A kind of production method of tensile strength >=1000 MPa ties |
| CN106282818B (en) * | 2015-06-05 | 2019-02-05 | 上海梅山钢铁股份有限公司 | The cold rolling coil that 980MPa grades of tensile strength banding steel and its manufacturing method |
| CN110747391A (en) * | 2019-08-30 | 2020-02-04 | 武汉钢铁有限公司 | Cold-rolled ultrahigh-strength steel with excellent elongation and preparation method thereof |
| CN111394661B (en) * | 2020-04-30 | 2021-07-27 | 西京学院 | Preparation process of low-alloy high-strength-toughness martensite duplex phase steel |
| CN114032465B (en) * | 2021-11-10 | 2022-05-10 | 武钢集团昆明钢铁股份有限公司 | 45-steel hot-rolled round steel bar special for numerical control machine tool spindle and preparation method thereof |
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| CN101363078B (en) * | 2008-09-25 | 2010-04-21 | 上海宝钢包装钢带有限公司 | Heat treatment method of steel belt for packages and steel belt for packages |
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