CN102268607A - High-strength and high-toughness steel plate special for coal mine hydraulic support and manufacturing method thereof - Google Patents
High-strength and high-toughness steel plate special for coal mine hydraulic support and manufacturing method thereof Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 78
- 239000010959 steel Substances 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001953 recrystallisation Methods 0.000 claims abstract description 11
- 229910052796 boron Inorganic materials 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000005496 tempering Methods 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000009749 continuous casting Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 239000010955 niobium Substances 0.000 description 11
- 239000010936 titanium Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910001563 bainite Inorganic materials 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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- 238000005098 hot rolling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The invention provides a high-strength and high-toughness steel plate special for a coal mine hydraulic support and a manufacturing method thereof, wherein the steel plate comprises the following components: 0.015% -0.075%, Si: 0.10-0.50%, Mn: 1.56% -2.00%, Nb: 0.03-0.12%, Ti: 0.005% -0.030%, B: 0.0005% -0.0030%, Cr: 0.20% -1.20%, Als: 0.010-0.050%, and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of molten iron pretreatment, converter smelting, refining, continuous casting and rolling, wherein an HTP process is adopted for rolling, the heating temperature is 1140-1220 ℃, the rolling temperature of a recrystallization zone is more than or equal to 980 ℃, the rolling temperature of a non-recrystallization zone is 970-Ar 3+ 0-100 ℃, the accumulated deformation of the non-recrystallization zone is more than 50%, cooling is accelerated after rolling, the cooling speed is 1-40 ℃/S, the final cooling temperature is 300-630 ℃, and then air cooling is carried out, and the tempering temperature is 500-680 ℃. The steel plate has the advantages of excellent welding performance, low production cost, high production efficiency and small performance difference in the plate thickness direction.
Description
Technical field
The invention belongs to and belong to the metallic substance technical field, relate in particular to a kind of high strength steel plate and manufacture method thereof of coal mine hydraulic supporting special use.
Background technology
Along with coal mine output and to combine the mechanization degree adopt more and more higher, the quantity of needed hydraulic support and highly also increasing.At present, the development trend of domestic and international modernized mine high-yield and high-efficiency working surface hydraulic support is the high-end hydraulic support of high workload resistance, high reliability.Be convenient to the down-hole for the deadweight that effectively alleviates hydraulic support and move, reduce energy consumption, enhance productivity, improve its supporting capacity significantly guaranteeing safety in production, also more and more higher to the requirement of strength of the steel plate of making hydraulic support.In the ordinary stent design, mainly selected the 16Mn steel plate of tensile strength 350MPa for use in the past, in recent years along with science and technology development, become rack body with the steel plate of the yield strength 460MPa of 16Mn steel plate close prices, some key position of support adopts the Q550 high tensile steel plate of tensile strength 700MPa, accounts for 20%～30%.At present, the strength grade of the used sheet material of high-end hydraulic support is higher, working resistance is at the support of 6000～8000kN, the Q550 high tensile steel plate of selecting tensile strength 700MPa for use is a main body, when the support of working resistance greater than 8000kN, the Q690 high tensile steel plate of selecting tensile strength 800MPa for use is a main body, can guarantee that support is functional, the cost performance height.Big mining height electro-hydraulic control hydraulic support, highly the structural part for 4.5m and 5.5m support mainly adopts tensile strength 700～800MPa high tensile steel plate.The performance of hydraulic support and cost and support select for use timber intensity grade and steel plate cost that much relations are arranged.
The application number of Wuhan Iron and Steel Company application a kind of ultrahigh-strength steel and manufacture method thereof that be 200610019667.1 patent disclosure with good solidity to corrosion and fatigue resistance.Its component percentage ratio is by weight counted C0.05～0.12, Si0.05～0.50, Mn1.10～1.70, P≤0.015, S≤0.010, Nb0.025～0.070, V0.005～0.080, Mo0.20～0.50, Ni0.30～0.80, Ti0.005～0.025, Cu0.25～0.80, B0.0005～0.0020, Cr0.10～0.70, surplus is Fe and inevitably is mingled with, and is particularly suited for as making the superstrength steel of colliery with hydraulic support and weight handling equipment.Its weak point is: in order to improve the intensity of steel, add valuable alloying element Ni, Mo, V and the higher Cu content of high level in the composition design simultaneously, improved the production cost of steel greatly.The maximum ga(u)ge of embodiment steel plate is 57mm.
The application number of Baosteel application provides the high tensile steel plate that can be used to make coal mine hydraulic supporting for 200610025127.4 and 200510029246.2 patent.The 800MPa grade high ductility low-yield ratio thick steel plate, its composition quality per-cent is: C0.05～0.09, Si0.35～0.55, Mn1.50～1.90, Ni0.30～0.70, Nb0.04～0.08, Al0.02～0.04, Ti0.01～0.04, surplus Fe and inevitable impurity.The 700MPa grade high ductility low-yield ratio thick steel plate, its composition quality per-cent is: C0.03～0.06, Si0.35～0.55, Mn1.00～1.55, Ni0.50～0.70, Nb0.02～0.06, Al0.02～0.04, Ti0.01～0.04, V0.04～0.07, Cu0.50～0.70, surplus Fe and inevitable impurity.Its manufacture method is: strand is heated to 1180～1220 ℃, rolling start rolling temperature is 1050～1100 ℃, when rolled piece thickness arrives 2～3 times of Finished Steel plate thickness, treat that on roller-way temperature is to 920～960 ℃, it is rolling to carry out subordinate phase subsequently, pass deformation 5～15mm, pass deformation rate 10～25%, 820～880 ℃ of finishing temperatures.Rolling end is quickened cooling in 60～120 seconds of air cooling then, is cooled to 460～600 ℃ with 10～20 ℃ of/second speed, air cooling after the steel plate water outlet.The maximum ga(u)ge of embodiment steel plate reaches 40mm.But, in these two rank steel, added noble element Ni and higher Cu content (700MPa level), cause the steel grade cost obviously to increase.
Application number has been 200310105914.6 patent disclosure does not need its tensile strength of modifier treatment can reach the above plate of moderate thickness of 560MPa, and has good plasticity and toughness, is used to make hydraulic support or automobile arm.But its carbon content C0.10-0.15%, welding property is poor, belongs to the junior in the high-strength steel simultaneously, and yield strength is difficult to reach more than the 500MPa.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of yield strength 〉=500N/mm is provided
2～1000N/mm
2, thickness can reach special-purpose high strength steel plate of coal mine hydraulic supporting and the manufacture method thereof of 100mm.
Yield strength 〉=the 500N/mm of the special-purpose high strength steel plate of coal mine hydraulic supporting of the present invention
2～1000N/mm
2, its thickness can reach 100mm, and its chemical ingredients is an essential characteristic with the low high Nb of C,,, does not add or suitably a small amount of elements such as Cu, Mo that add according to intensity rank and thickness as main adding elements with elements such as Mn with low cost, Cr.The chemical component weight per-cent of this steel plate is: C:0.015%～0.075%, Si:0.10%～0.50%, Mn:1.56%～2.00%, Nb:0.03%～0.12%, Ti:0.005%～0.030%, B:0.0005%～0.0030%, Cr:0.20%～1.20%, Als:0.010%～0.050%, P≤0.025%, S≤0.015%, [N]≤0.0080%, surplus are Fe and unavoidable impurities.
Look steel plate thickness and intensity rank in addition and can add among Cu, the Mo one or more in right amount.Its content weight percent is respectively Cu:0.0%～0.3%, Mo:0.00%～0.25%.
The alloying element that the present invention selects is at yield strength 〉=500N/mm
2～1000N/mm
2, the thickness main effect that can reach in the steel of 100mm is:
C: carbon is very big to intensity, toughness, the welding property influence of steel.C content is lower than at 0.015% o'clock, is difficult to obtain high strength, and welded heat affecting zone is softening; Carbon is higher than at 0.075% o'clock, during heating in the steel solid solution Nb amount few, make the advantage of high Nb content be difficult to embody, and influence the welding property of steel.
Mn: manganese is to improve intensity and flexible effective element, bainite transformation is had bigger promoter action, and effect is more remarkable under the Ultra-low carbon condition, and cost is very cheap, therefore in the present invention the Mn element as main alloy element, Mn content is controlled at 1.56%～2.0%.
B: boron is the composition of outbalance in the ultra-low-carbon bainite steel, and it can improve the hardening capacity of steel, particularly adds the boron of trace in ultra low-carbon steel, can suppress austenite effectively to ferrite, pearlitic transformation.Boron content is lower than at 0.0005% o'clock, is difficult to play above-mentioned effect, and boron content is higher than at 0.0030% o'clock, has a strong impact on steel grade toughness, therefore controls B0.0005%～0.0030%.
Nb: niobium is the important interpolation element in the steel of the present invention, and it is the austenitic recrystallize of delayed deformation effectively, stops austenite crystal to be grown up, improve austenite recrystallization temperature, reduce the rolling rolling load of non-recrystallization, shorten time of staying temperature, boost productivity, improve intensity and toughness simultaneously.It and micro-boron compound action can be improved hardening capacity significantly, promote bainite transformation, can play the effect of Mo element to bainite transformation and raising intensity.Nb content is lower than 0.03%, and above-mentioned effect is not obvious.Therefore Nb content is higher than at 0.12 o'clock, obviously influences steel grade toughness and welding property, controls Nb0.03%～0.12%, and along with the increase of steel plate thickness, and Nb content also increases and is tending towards the upper limit.
Ti: adding the titanium of trace, is for the nitrogen element in the fixing steel, thereby guarantees the raising hardening capacity effect of boron.In the best condition, titanium, nitrogen form titanium nitride, stop steel billet the growing up of crystal grain in heating, rolling, welding process, improve the toughness of mother metal and welded heat affecting zone.Titanium is lower than at 0.005% o'clock, and nitrogen fixation effect is poor, surpasses at 0.03% o'clock, and nitrogen fixation effect reaches capacity, and superfluous titanium will make the toughness of steel worsen.Ti/N ratio is controlled at about 2.75～3.75 and is advisable.
Si: silicon is the bioelement of deoxidation in steel making, also has certain strengthening effect, when content is lower than 0.1%, smelts difficulty and increases; Content surpasses at 0.5% o'clock, and the degree of cleaning of steel descend, and toughness reduces, and weldability is poor, and temper brittleness increases.Therefore control Si0.10%～0.50%.
Als: aluminium is deoxidant element, can be used as the AlN forming element, crystal grain thinning effectively, and when it contained quantity not sufficient 0.01%, effect was less; Surpass at 0.05% o'clock, it is saturated that desoxydatoin is tending towards, and increases steel inclusion, harmful to mother metal and welding heat influence area toughness.Therefore control Als0.010%～0.050%.
Cr: chromium is the important interpolation element in the steel of the present invention, to improve the intensity of steel.Consider from aspects such as economy, welding property and intensity, in the present invention Cr content is controlled at Cr0.20%～1.20%.
Cu: the alloying element as selectivity of the present invention adds except gaining in strength, also helps the acquisition good low-temperature flexibility.In steel, add Cu, can utilize the comprehensive action of Cu-B further to improve the hardening capacity of steel, promote the formation of bainite.Cu content of the present invention is controlled at below 0.30%, is higher than this value, need to add the Ni element preventing to heat or to produce the tendency of splitting surface crack during hot rolling, thereby increases the steel grade cost.
Mo: molybdenum helps the refinement of austenite crystal when rolling and the generation of fine bainite, but its cost height, and weldability and toughness reduce.As the alloying element that selectivity of the present invention adds, according to steel plate thickness and intensity targets, the present invention controls Mo0.00%～0.25%.
The upper limit of the impurity element in the steel is controlled at P≤0.025%, S≤0.015%, [N]≤0.0080% and is advisable, and content is low more, and the steel grade performance is good more.
In the present invention, should suitably determine to add the kind and the content of element according to target strength rank and steel plate thickness.
The manufacture method of the special-purpose high strength steel plate of high strength coal mine hydraulic supporting of the present invention comprises following processing step: hot metal pretreatment-converter smelting-refining-continuous casting-rolling, be characterized in adopting HTP technology in the operation of rolling, Heating temperature is 1140～1220 ℃ before rolling, adopt the controlled rolling of two stages, recrystallization zone rolling temperature 〉=980 ℃, intermediate blank air cooling or pressure cooling (forced air-cooling, water-cooled, mist is cold etc.), non-recrystallization district rolling temperature be 970 ℃～(Ar3+0～100 ℃), non-recrystallization district accumulation of distortion amount is greater than 50%, roll the after-acceleration cooling, the surface of steel plate speed of cooling is 1～40 ℃/S, and stopping cooling temperature is 300～630 ℃, afterwards air cooling.For obtaining best effect, steel plate of the present invention also will carry out temper, to give full play to the precipitation strength effect of Nb, eliminates internal stress, improves toughness and plasticity, reduces the timeliness susceptibility of steel grade.The tempering temperature of steel plate of the present invention is 500～680 ℃.In drawing process,, improve the toughness and the plasticity of steel simultaneously by the intensity of precipitation strength raising steel.The yield strength of steel plate and tensile strength also have raising in various degree after the tempering, and can guarantee the performance uniformity of Plate Steel thickness direction.
High strength steel plate of the present invention adopts low C content, high Nb content, does not add or add less noble element Mo, and the yield strength that just can obtain to meet the demands by the HTP+ tempering process is greater than other high tensile steel plate of 500～1000MPa level, and thickness can reach 100mm.This steel plate welding property is good, and its obdurability, plasticity and welding property coupling are good, and production cost is low, and production operation is convenient, the production efficiency height, and thickness of slab directional performance difference is little.Steel plate of the present invention also can be widely used in fields such as engineering machinery except being used for coal mine hydraulic supporting.
Embodiment
The present invention is further described by the following embodiment.
The concrete chemical ingredients of the embodiment of the invention sees Table 1, and actual process parameter sees Table 2, and the object performance assay sees Table 3.
The smelting composition (Wt%) of table 1 embodiment of the invention steel grade
The actual process parameter of table 2 embodiment of the invention
| Retort number | Rolling sequence number | Heating temperature ℃ | Thickness mm | Roughing temperature ℃ | Secondary start rolling temperature ℃ | Finishing temperature ℃ | Return red temperature ℃ | Rate of cooling ℃/s | Tempering temperature ℃ |
| 8B04081 | A5 | 1200 | 20 | 1178 | 800 | 743 | 344 | 33.5 | 650 |
| 8B04142 | B4 | 1180 | 30 | 1086 | 824 | 815 | 365 | 24.3 | 650 |
| 8B04081 | B1 | 1180 | 30 | 1200 | 820 | 800 | 420 | 20.9 | 680 |
| 8D10712 | E1 | 1190 | 55 | 1171 | 882 | 851 | 300 | 1.5 | 610 |
| 8B04112 | B2 | 1180 | 30 | 1129 | 818 | 811 | 380 | 23.3 | 680 |
| 8D09714 | H2 | 1140 | 50 | 1025 | 839 | 760 | 378 | 4.6 | 670 |
| 8D09713 | H1 | 1140 | 50 | 1033 | 825 | 727 | 408 | 3.8 | 670 |
| 8D10712 | E2 | 1190 | 55 | 1170 | 883 | 860 | 420 | 1.6 | 610 |
| 8B04081 | B5 | 1180 | 30 | 1030 | 915 | 905 | 390 | 28.4 | 650 |
| 8D09716 | I2 | 1180 | 60 | 1039 | 840 | 836 | 343 | 5.9 | 630 |
| 8B04081 | A1 | 1200 | 20 | 1130 | 900 | 793 | 342 | 29.9 | 590 |
| 8B04142 | B8 | 1180 | 30 | 1033 | 865 | 885 | 415 | 25.7 | 610 |
| 8B04112 | A6 | 1200 | 20 | 1042 | 810 | 819 | 370 | 31 | 680 |
| 8D10711 | C4 | 1150 | 16 | 1072 | 921 | 870 | 560 | 17.7 | 570 |
| 8D10712 | C5 | 1150 | 16 | 1053 | 920 | 860 | 630 | 13.8 | 570 |
| 8D09715 | I1 | 1140 | 60 | 1017 | 833 | 817 | 303 | 6.2 | 630 |
| 8B04112 | B6 | 1180 | 30 | 1060 | 894 | 886 | 475 | 21.7 | 610 |
| 8D10712 | F1 | 1160 | 80 | 1121 | 817 | 820 | 475 | 1.2 | 630 |
| 8D10712 | F2 | 1160 | 80 | 1137 | 823 | 825 | 486 | 1.2 | 630 |
| 8D10712 | G1 | 1170 | 100 | 1118 | 827 | 830 | 457 | 1 | 670 |
| 8D10712 | G2 | 1170 | 100 | 1117 | 833 | 835 | 446 | 1.1 | 670 |
| 8D10712 | C6 | 1150 | 16 | 1044 | 920 | 846 | 550 | 20 | 570 |
| 8D10711 | D1 | 1220 | 40 | 1190 | 892 | 820 | 339 | 1.6 | 550 |
| 8B04141 | B7 | 1180 | 30 | 1036 | 890 | 867 | 425 | 25 | 610 |
| 8D10712 | C8 | 1150 | 16 | 1025 | 920 | 830 | 540 | 17.7 | 650 |
| 8B04142 | A8 | 1200 | 20 | 1095 | 800 | 782 | 300 | 35.9 | 630 |
| 8D10711 | D2 | 1220 | 40 | 1164 | 888 | 834 | 344 | 2 | 550 |
| 8B04112 | A2 | 1200 | 20 | 1142 | 902 | 835 | 330 | 31.3 | 590 |
| 8B04141 | B3 | 1180 | 30 | 1083 | 820 | 812 | 395 | 23.6 | 550 |
| 8B04142 | A4 | 1200 | 20 | 1200 | 928 | 863 | 345 | 37.2 | 500 |
| 8D10712 | C7 | 1150 | 16 | 1031 | 900 | 840 | 440 | 27.7 | 650 |
| 8B04141 | A7 | 1200 | 20 | 1069 | 800 | 800 | 330 | 33.3 | 500 |
| 8B04141 | A3 | 1200 | 20 | 1170 | 904 | 836 | 340 | 30.1 | 500 |
| 8D10711 | C1 | 1150 | 16 | 1117 | 950 | 884 | 406 | 27.9 | 500 |
| 8D10711 | C3 | 1150 | 16 | 1087 | 940 | 860 | 300 | 39.2 | 500 |
| 8D10711 | C2 | 1150 | 16 | 1098 | 938 | 870 | 380 | 30.4 | 500 |
The mechanical property of table 3 embodiment of the invention
Claims (4)
1. the special-purpose high strength steel plate of a coal mine hydraulic supporting, the chemical component weight per-cent that it is characterized in that this steel plate is: C:0.015%～0.075%, Si:0.10%～0.50%, Mn:1.56%～2.00%, Nb:0.03%～0.12%, Ti:0.005%～0.030%, B:0.0005%～0.0030%, Cr:0.20%～1.20%, Als:0.010%～0.050%, P≤0.025%, S≤0.015%, [N]≤0.0080%, surplus are Fe and unavoidable impurities.
2. high strength steel plate according to claim 1 is characterized in that also containing Cu:0.0%～0.3%, Mo:0.00%～0.25% in the chemical ingredients of described steel plate.
3. high strength steel plate according to claim 1 and 2, the thickness that it is characterized in that described steel plate is 16～100mm.
4. claim 1, the manufacture method of 2 or 3 described high strength steel plates, comprise: hot metal pretreatment-converter smelting-refining-continuous casting-rolling, it is characterized in that the operation of rolling adopts HTP technology, Heating temperature is 1140～1220 ℃ before rolling, adopt the controlled rolling of two stages, recrystallization zone rolling temperature 〉=980 ℃, intermediate blank air cooling or force cooling, non-recrystallization district rolling temperature be 970 ℃～(Ar3+0～100 ℃), non-recrystallization district accumulation of distortion amount is greater than 50%, roll the after-acceleration cooling, the surface of steel plate speed of cooling is 1～40 ℃/S, and stopping cooling temperature is 300～630 ℃, afterwards air cooling, and carry out temper, tempering temperature is 500～680 ℃.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057207A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Composite wear-resistant liner of sandwich structure |
| CN103225040A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103225042A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN104294165A (en) * | 2014-10-13 | 2015-01-21 | 首钢总公司 | High-strength and medium-thickness steel plate with high uniform plastic deformability and production method thereof |
| CN104533479A (en) * | 2014-12-22 | 2015-04-22 | 中煤北京煤矿机械有限责任公司 | Multi-action blocking block for base |
| CN108300939A (en) * | 2018-01-22 | 2018-07-20 | 五矿营口中板有限责任公司 | A kind of low cost Q550D high strength steel plates and its production method |
| CN109338225A (en) * | 2018-11-12 | 2019-02-15 | 南京钢铁股份有限公司 | The ultrafast cold technique production Q690D slab of one kind and manufacturing method |
| CN111910128A (en) * | 2020-08-07 | 2020-11-10 | 安阳钢铁股份有限公司 | Steel plate for Q690-grade coal mine hydraulic support and production method thereof |
| CN111910127A (en) * | 2020-08-07 | 2020-11-10 | 安阳钢铁股份有限公司 | Q890 steel plate for hydraulic support meeting welding heat input of 30kJ/cm and preparation method thereof |
| CN113073272A (en) * | 2021-03-22 | 2021-07-06 | 南阳汉冶特钢有限公司 | High-strength Q690D steel plate and production method thereof |
| CN114250424A (en) * | 2020-09-21 | 2022-03-29 | 宝山钢铁股份有限公司 | Ni-free steel for low-temperature pressure vessel and manufacturing method thereof |
| CN114480962A (en) * | 2021-12-24 | 2022-05-13 | 安阳钢铁集团有限责任公司 | Steel for 620 MPa-grade coal mine hydraulic support and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619423A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | High-strength-toughness low-yield-ratio easy-welding structural steel plate and manufacturing method thereof |
| CN101619419A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Steel plate for low-carbon high-niobium high-strength welding structure and manufacturing method thereof |
-
2010
- 2010-06-07 CN CN2010102017371A patent/CN102268607A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619423A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | High-strength-toughness low-yield-ratio easy-welding structural steel plate and manufacturing method thereof |
| CN101619419A (en) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | Steel plate for low-carbon high-niobium high-strength welding structure and manufacturing method thereof |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057207A (en) * | 2013-01-29 | 2013-04-24 | 安徽工业大学 | Composite wear-resistant liner of sandwich structure |
| CN103225040A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103225042A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103225040B (en) * | 2013-05-13 | 2015-06-10 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103225042B (en) * | 2013-05-13 | 2015-08-05 | 湖南华菱湘潭钢铁有限公司 | A kind of production method of easy-formation high-strength medium plate |
| CN104294165A (en) * | 2014-10-13 | 2015-01-21 | 首钢总公司 | High-strength and medium-thickness steel plate with high uniform plastic deformability and production method thereof |
| CN104294165B (en) * | 2014-10-13 | 2017-02-15 | 首钢总公司 | High-strength and medium-thickness steel plate with high uniform plastic deformability and production method thereof |
| CN104533479A (en) * | 2014-12-22 | 2015-04-22 | 中煤北京煤矿机械有限责任公司 | Multi-action blocking block for base |
| CN108300939A (en) * | 2018-01-22 | 2018-07-20 | 五矿营口中板有限责任公司 | A kind of low cost Q550D high strength steel plates and its production method |
| CN109338225A (en) * | 2018-11-12 | 2019-02-15 | 南京钢铁股份有限公司 | The ultrafast cold technique production Q690D slab of one kind and manufacturing method |
| CN111910128A (en) * | 2020-08-07 | 2020-11-10 | 安阳钢铁股份有限公司 | Steel plate for Q690-grade coal mine hydraulic support and production method thereof |
| CN111910127A (en) * | 2020-08-07 | 2020-11-10 | 安阳钢铁股份有限公司 | Q890 steel plate for hydraulic support meeting welding heat input of 30kJ/cm and preparation method thereof |
| CN111910128B (en) * | 2020-08-07 | 2022-02-22 | 安阳钢铁股份有限公司 | Steel plate for Q690-grade coal mine hydraulic support and production method thereof |
| CN111910127B (en) * | 2020-08-07 | 2022-02-22 | 安阳钢铁股份有限公司 | Q890 steel plate for hydraulic support meeting welding heat input of 30kJ/cm and preparation method thereof |
| CN114250424A (en) * | 2020-09-21 | 2022-03-29 | 宝山钢铁股份有限公司 | Ni-free steel for low-temperature pressure vessel and manufacturing method thereof |
| CN113073272A (en) * | 2021-03-22 | 2021-07-06 | 南阳汉冶特钢有限公司 | High-strength Q690D steel plate and production method thereof |
| CN114480962A (en) * | 2021-12-24 | 2022-05-13 | 安阳钢铁集团有限责任公司 | Steel for 620 MPa-grade coal mine hydraulic support and manufacturing method thereof |
| CN114480962B (en) * | 2021-12-24 | 2023-03-10 | 安阳钢铁集团有限责任公司 | Steel for 620 MPa-grade coal mine hydraulic support and manufacturing method thereof |
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