CN104911496A - Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof - Google Patents
Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof Download PDFInfo
- Publication number
- CN104911496A CN104911496A CN201510390165.9A CN201510390165A CN104911496A CN 104911496 A CN104911496 A CN 104911496A CN 201510390165 A CN201510390165 A CN 201510390165A CN 104911496 A CN104911496 A CN 104911496A
- Authority
- CN
- China
- Prior art keywords
- steel
- temperature
- pump truck
- production method
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 100
- 239000010959 steel Substances 0.000 title claims abstract description 100
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000002356 single layer Substances 0.000 title abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 239000011651 chromium Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 10
- 239000010937 tungsten Substances 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- 239000011575 calcium Substances 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- 229910052691 Erbium Inorganic materials 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 19
- 238000000137 annealing Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000011572 manganese Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- 235000019362 perlite Nutrition 0.000 claims description 7
- 239000010451 perlite Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052729 chemical element Inorganic materials 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 5
- 241001062472 Stokellia anisodon Species 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- 229910001563 bainite Inorganic materials 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 229910001562 pearlite Inorganic materials 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 238000010583 slow cooling Methods 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005261 decarburization Methods 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910000967 As alloy Inorganic materials 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 150000002123 erbium compounds Chemical class 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010106 rotational casting Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses steel for a single-layer concrete conveying pipe of a trailer pump vehicle and a production method thereof. The steel for the single-layer concrete conveying pipe of the trailer pump vehicle includes 0.38-0.48% of carbon, 0.05-0.35% of silicon, 1.60-2.50% of manganese, 0.0015-0.0030% of calcium, 0.35-0.65% of chromium, 0.30-0.50% of tungsten, 0.05-0.20% of erbium, 0.015-0.045% of aluminum, less than or equal to 0.010% of phosphorus, less than or equal to 0.003% of sulfur, less than or equal to 0.006% of nitrogen, and rest of iron and unavoidable impurity. The steel is high in wear-resisting property, the proper final rolling and coiling temperature is controlled in the production process, the standing time of a steel coil at a two-phase region is reduced, the steel is quickly cooled to a pseudo-eutectoid pearlite precipitation zone, the proeutectoid ferrite production is reduced, the proeutectoid ferrite is not generated in a slow cooling process after coiling, and meanwhile, the bainite formation due to a too low coiling temperature is avoided, and more pearlite is formed.
Description
Technical field
The present invention relates to a kind of wear resisting steel, belong to manufacture field of low alloy steel, be specifically related to one and drag pump truck one-course concrete to carry tube steel.
Background technology
At present, China is in the peak time of capital construction, and real estate, water conservancy projects, traffic facilities etc. industry all heavy demand concrete conveyance engineering machinery, as dragged pump truck.Drag pump truck concrete single-layer transfer lime to be a kind of consumable products, delivering concrete needs after reaching certain cube of area to change, therefore its demand is very large.Engineering machinery producers different at present adopts different concrete conveyance tube materials, as ferrous materials, plastic material, stupalith etc., wherein based on ferrous materials.The superiority index weighing concrete conveying pipe material is wear resistance and the anti-fatigue performance of ferrous materials.Current common holder pump truck concrete steel pipe conveying amount of stone about 10000 ~ 15000m
3, adopt high abrasion tube lifetime can bring up to>=40000m
3.
The domestic pump truck concrete single-layer transfer lime that drags mainly adopts the method tubulation of high frequency sews resistance welding, steel used mainly contain 20,40Mn, the highquality carbon steels such as 50, be significantly improved along with carbon content in steel improves its wear resistance, in tissue, the proeutectoid ferrite scale of construction reduces, and hardening capacity is better.But along with carbon content improves, the intensity of material improves, and toughness plasticity declines, and cold formability and processing characteristics significantly decline, and weldability also significantly reduces simultaneously.
Chinese invention patent application (publication number 1036146444A, publication date 2014.03.05) discloses a kind of pump truck high-wear-resistant alloy steel, and the chemical element composition that it contains and weight percent thereof are: carbon 0.2 ~ 0.4, silicon 1.4 ~ 1.7, manganese 4.2 ~ 4.4, chromium 1.7 ~ 2.1, molybdenum 0.4 ~ 0.7, aluminium 0.1 ~ 0.3, boron 0.3 ~ 0.5, titanium 0.5 ~ 0.8, La0.04 ~ 0.07, S≤0.04, P≤0.04, surplus are iron.Patent application steel alloy hardness of the present invention is high, wear resistance is fabulous, obdurability is high, plasticity-is good, erosion resistance is better, is applicable to work in strong abrasion environment, as pump truck tank body, transfer lime etc., and long service life.But add the alloying elements such as too many Si, Mn, Cr, Al, high expensive.And add too much Si in steel, unfavorable to toughness; Too much Mn, is unfavorable for welding; Too much Al, easily forms oxide inclusion; Add that this steel P, S content controls more loose, purity of steel is not high, affects steel pipe over-all properties.In addition, this steel carbon content is relatively low, has more proeutectoid ferrite, and when causing annealing, pearlitic spheroidization rate is poor, and undeclared pearlitic spheroidization rate when how to avoid producing too much proeutectoid ferrite to improve annealing on rolling technology.
Chinese invention patent application (publication number 103173682A, publication date 2013.06.26) discloses the effective hot-rolled coil of a kind of concrete conveyance and manufacture method thereof, and its composition by weight percent (%) is: C:0.60 ~ 0.70; Si:0.12 ~ 0.37; Mn:0.90 ~ 1.20; Al:0.015 ~ 0.06; P≤0.035; S≤0.035; Cr:0.20 ~ 0.50; V≤0.25, surplus is Fe and inevitable impurity element.Its technique comprises: hot metal pretreatment → converter smelting → external refining → sheet billet continuous casting → red send the mode of straight dress → heating of plate blank → high-pressure water descaling → roughing mills rolling → high-pressure water descaling → finishing train rolling → batch → quality and performance inspection → packing mark → warehouse-in to produce.Method two, hot metal pretreatment → converter smelting → external refining → sheet billet continuous casting → slab annealing → heating of plate blank → high-pressure water descaling → roughing mills rolling.In patent application steel of the present invention, P, S require more loose, and one-course concrete transfer lime adopts high-frequency resistance melting solder mode, welding joint position is strict to P, S content requirement in steel, once welding joint position exists detrimental impurity, then can form serious welding flaw.
Chinese invention patent application (publication number 102747290A, publication date 2012.10.24) discloses a kind of Economical wear-resistant steel and manufacture method thereof, its chemical component weight per-cent is: C:0.42 ~ 0.60%, Si:0.10 ~ 0.40%, Mn:0.60 ~ 1.40%, P≤0.020%, S≤0.010%, Cr:0.20 ~ 0.80%, Al:0.010 ~ 0.080%, Ti:0.005 ~ 0.040%, Ca:0.0010 ~ 0.0050%, B≤0.0015%, N:0.0030 ~ 0.0100%, and surplus is Fe and inevitable impurity.Manufacture method, comprises the steps such as smelting, casting, hot rolling, tubulation, welding, Quench and temper.The high rigidity obtained by above composition and technique, high-wearing feature wear resisting steel welded tube, to be applicable in engineering machinery very easily wear equipment, as truck mounted concrete pump transfer lime etc.In this application for a patent for invention, steel contains the elements such as higher C, Cr, and also improve the element of hardening capacity containing B etc., the strength ratio of steel plate is higher, but toughness plasticity relative mistake some.And P, S content is higher in this application for a patent for invention, to welding property and processing characteristics unfavorable; In addition, N content is higher, is up to 0.010%, too high N content, and when strand temperature is lower than 900 DEG C, AlN separates out at crystal boundary, the embrittlement of aggravation steel, and border crackle during strand aligning, is formed after strand rolling and stick up skin crackle, affect steel plate use properties.
Chinese invention patent application (publication number 101323934, publication date 2008.12.17) disclose a kind of high antiwear concrete conveying pipe, be the C of 0.15 ~ 0.4% by weight ratio, the Si of 0.1 ~ 2.0%, the Mn of 1.6 ~ 3.0%, the Cr of 0.3 ~ 2.0%, the Mo of 0 ~ 0.5%, the V of 0.02 ~ 0.1%, the Ti of 0.01 ~ 0.06%, the Ni of 0 ~ 0.03%, the Cu of 0 ~ 0.5%, the Nb of 0.02 ~ 0.06%, the Al of 0.01 ~ 0.05%, the B of 0.0005 ~ 0.005%, the Re of 0.02 ~ 0.06%, the N of 0 ~ 0.02%, the S of 0 ~ 0.035%, the P of 0 ~ 0.035% and the Fe composition of surplus, through smelting, rotational casting, hot rolling, the steps such as controlled cooling model are made.This application for a patent for invention production technique is brief, and the transfer lime of production has martensite, the bainite metallographic structure of high-wearing feature energy, and work-ing life improves 4 ~ 20 times than No. 20 seamless tubes.But this application for a patent for invention is applicable to cast article, containing expensive alloying elements such as higher Ni, Mo, V, Cu, Nb, with high costs.Same, this steel carbon content is relatively low, has more proeutectoid ferrite, and when causing annealing, pearlitic spheroidization rate is poor, and undeclared pearlitic spheroidization rate when how to avoid producing too much proeutectoid ferrite to improve annealing on rolling technology, steel plate forming and processing characteristics relative mistake some.Further, this steel N content controls more loose, and data shows, and in steel, N content is high, and easy and microalloy element Nb produces nitride and separates out.When strand temperature is down to less than 950 DEG C, a large amount of fine Nb (C, N) separates out by γ, causes to prolong plasticity and sharply reduce; Temperature lower than less than 900 DEG C, then enters AlN Precipitation Temperature district, and AlN separates out the embrittlement that also can aggravate steel at γ crystal boundary, the border crackle when strand is aligned, forms edge and stick up skin, affect yield of steel plate and use properties after rolling.
Summary of the invention
Object of the present invention is exactly that the pump truck one-course concrete that drags that a kind of machine-shaping property and wear resisting property will be provided all excellent carries tube steel.
For achieving the above object, the technical solution used in the present invention is: drag pump truck one-course concrete to carry tube steel, it is characterized in that: the chemical element composition contained and weight percent thereof are: carbon 0.38 ~ 0.48%, silicon 0.05 ~ 0.35%, manganese 1.60 ~ 2.50%, calcium 0.0015 ~ 0.0030%, chromium 0.35 ~ 0.65%, tungsten 0.30 ~ 0.50%, erbium 0.05 ~ 0.20%, aluminium 0.015 ~ 0.045%, phosphorus≤0.010%, sulphur≤0.003%, nitrogen≤0.006%, surplus are iron and inevitable impurity.
Below sketch the reason of selected alloying element and composition range in the present invention:
Carbon: carbon is the principal element improving hardness, intensity and wear resistance, improves the hardening capacity of steel band simultaneously.Hypoeutectoid steel carbon content is higher, and the proeutectoid ferrite scale of construction is fewer.But carbon content is high, the toughness plasticity of steel and welding property are deteriorated, and according to the purposes characteristic of steel of the present invention, in the present invention, carbon content control scope is 0.38 ~ 0.48%, preferably 0.42 ~ 0.48%.
Silicon: silicon is the bioelement of deoxidation in steel making, and the intensity improving steel with solution strengthening form; The too low deoxidation effect of content is not good, the too high silicate that can produce low melting point when follow-up vertical masonry joint resistance welding of content, increases the mobility of slag and deposite metal, reduces weld seam quality; Simultaneously element silicon can improve the activity of carbon in steel, thus strengthens steel strip surface decarburizing tendency, but silicone content is too high can reduce toughness, and controlling silicone content in the present invention is 0.05 ~ 0.35%.
Manganese: manganese is also one of deoxidant element, can improve the intensity of steel simultaneously.Manganese is the important element improving steel hardenability and wear resistance, and when Fe content is more than 1%, the wear resistance of steel significantly strengthens.But Fe content is higher unfavorable to welding property, and manganese is chosen as 1.60 ~ 2.50%.
Calcium: content controls 0.0015 ~ 0.0030%, the calcium of trace makes the nodularization of strip sulfide inclusion, reduces steel anisotropic difference, improves steel band toughness.The calcium of trace promotes the Grain Boundary Segregation of C simultaneously, makes proeutectoid ferrite at the more difficult forming core of austenite grain boundary, thus plays the effect suppressing proeutectoid ferrite.
Aluminium: content controls 0.015 ~ 0.045%, aluminium is effective deoxidant element, energy crystal grain thinning, improves intensity and the toughness of steel.Aluminium too high levels Al
2o
3inclusion, affects steel performance.
Chromium: chromium is medium carbide forming element, in all various carbide, chromium carbide is the most tiny one, and it can be evenly distributed in steel volume, so have high intensity, hardness, yield-point and high wear resistance.Can make structure refinement due to it and all distribute, so plasticity, toughness, this is especially valuable to tool steel.Meanwhile, the hardness that the adding of chromium all can improve material and in During Eutectoid Decomposition, promote perlitic transformation, stable and refine pearlite.Chromium can make C curve move to right, and postpone ferrite, perlitic transformation, partly can suppress proeutectoid ferrite.A certain amount of chromium can suppress the decarburization of middle, high-carbon.But when chromium too high levels, the intensity of steel can be improved, increase the cool attenuation of medium and high carbon steel and reduce plasticity and toughness.Chromium is chosen as 0.35 ~ 0.65%, and preferably 0.40 ~ 0.60%.
Tungsten (W), erbium (Er): in structural alloy steel, add tungsten, can form stable alloy carbide, hinders Austenite Grain Growth, can also increase carburized layer hardness, improves wear resistance.Tungsten can be high temperature resistant, and be dissolved in and can form carbide with carbon in steel and be called wolfram varbide, can improve the intensity of steel.In steel, add the tungsten of 0.3 ~ 1.0%, steel belt roof bolt fragility can also be reduced.The effect of erbium in steel and niobium, vanadium, titanium are similar, when content is less, have the effect of deoxidation, purification and crystal grain thinning.The low-temperature flexibility of steel can be improved, eliminate aging phenomenon, improve the compressive property of steel.Crucially, experimental study proves, is greater than the tungsten of 0.3% and is greater than the wear resisting property that 0.05% erbium compound interpolation can significantly improve steel.The tungsten that steel of the present invention is chosen is 0.30% ~ 0.50%, and erbium is 0.05% ~ 0.20%.
Phosphorus: phosphorus is generally considered to be impurity, obviously affects the cold roll forming performance of steel.The phosphorus intensity and the hardness that improve steel the same as carbon, but reduces steel ductility and toughness or shock strength, particularly to quenched and tempered steel.For steel of the present invention, if impurity element phosphorus exists in a large number, can produce serious disadvantageous effect to high frequency resistance welding, its compound increases the mobility of slag and deposite metal, reduces weld seam quality; Therefore, the phosphorus content of steel of the present invention requires lower than 0.010%.
Sulphur: sulphur is generally considered to be harmful element, sulfide reduces lateral extensibility and the toughness of steel.And the increase of sulphur content can weaken the weldability of steel, be also disadvantageous to the surface quality of steel.Equally, sulfide increases the mobility of slag and deposite metal, reduces weld seam quality; The sulphur content of steel of the present invention requires lower than 0.003%.
Nitrogen: it is nonmetal inclusion that it and alloying element generate nitride, is priorly reduction of alloys producing.Nitrogenous steel understands the plasticity significantly reducing it in annealing process because nitride is separated out.The ability of ferrite dissolved nitrogen is very low.When being dissolved with oversaturated nitrogen in steel, after placement longer for some time or nitrogen will occur with the precipitation of nitride form 200 DEG C ~ 300 DEG C heating subsequently, and the hardness of steel, intensity are improved, plasticity declines, and timeliness occurs.Nitrogen≤0.006% of steel of the present invention.
The present invention also provides a kind of production method of dragging pump truck one-course concrete to carry tube steel as described above, comprises the following steps:
1) smelt, cast
Strand is prepared by described composition and weight percent, employing Production Technology for Superior Pure Steel;
2) rolling
Slab heating temperature 1220 ~ 1280 DEG C, heat-up time 180 ~ 240min, process furnace adopt reducing atmosphere; Roughing start rolling temperature 1100 DEG C ~ 1200 DEG C, roughing finishing temperature 1000 DEG C ~ 1040 DEG C, finish rolling start rolling temperature 980 DEG C ~ 1000 DEG C, finish rolling finishing temperature 860 DEG C ~ 920 DEG C;
3) cool, batch
Upper and lower cooling manifold water than 1: 1.25 ~ 1: 1.50, the water yield than 1: 1, and for reducing the generation of proeutectoid ferrite, need reduce coil of strip in the α+γ two-phase region temperature range residence time, therefore, at A as far as possible
c3quasi-eutectoid perlite is quickly cooled to separate out at DEG C temperature of+(10 ~ 25) interval, and ensure average cooling rate 50 DEG C/s ~ 100 DEG C/s, if average cooling rate is more than 100 DEG C/more than s after finish to gauge, steel plate top layer and core structure are difficult to consistent, the easy bainite in top layer; Control coiling temperature Ac
1-(30 ~ 50) DEG C, ensure to batch in rear annealing process on the one hand not generate proeutectoid ferrite, meanwhile, avoid the too low formation bainite of coiling temperature, thus reach the more perlite of formation;
Wherein: A
c3for proeutectoid ferrite during heating all changes austenitic finishing temperature into, its temperature is 837 DEG C;
Ac
1for perlite during heating is to the temperature of austenitic transformation, its temperature is 727 DEG C;
4) anneal
After As rolled coil of strip air cooling to room temperature, be heated to 650 DEG C ~ 750 DEG C, soaking time 14 ~ 28h, below furnace cooling to 580 DEG C, air cooling of coming out of the stove is to room temperature, thus make steel obtain good processing and processability, the perlite being organized as abundant nodularization after coil annealing.
Further, described step 2) need strand cooling in heap 32 ~ 48 hours before strand heating; Because steel of the present invention belongs to medium carbon steel, carbon content and alloy content are relatively high, in order to prevent producing thermal crack in slab cooling process, and cause disconnected base phenomenon or cause steel plate to crack, after continuous casting step, and could Xia Song Steel Mill after the necessary cooling in heap 32h of strand.
Further, described step 4) in after As rolled coil of strip air cooling to room temperature, carry out Spheroidizing Annealing through perhydro formula bell type annealing furnace.
Compared with prior art, the present invention has the following advantages:
1, the pump truck one-course concrete that drags of the present invention carries tube steel, adopts medium and high carbon steel Composition Design, does not add the precious alloys such as Ni, Mo, Cu, reduce production cost.In addition, add calcium as alloy element, improve sulfide inclusion on the one hand, reduce the anisotropic of steel, calcium promotes the Grain Boundary Segregation of carbon on the other hand, makes proeutectoid ferrite at the more difficult forming core of austenite grain boundary, thus plays the effect suppressing proeutectoid ferrite; Add chromium as alloy element, the hardening capacity of steel can be improved on the one hand, can improve material hardness and in During Eutectoid Decomposition, promote perlitic transformation, stablize and refine pearlite, suppress the decarburization of middle, high-carbon simultaneously, form tiny chromium carbide on the other hand, be evenly distributed in steel volume, make steel have high intensity, hardness, yield-point and high wear resistance; Compound adds tungsten and erbium, forms stable alloy carbide, hinders Austenite Grain Growth; Increase carburized layer hardness, significantly improve the wear resisting property of steel.
2, the yield strength R of steel of the present invention
eL≤ 400MPa, tensile strength R
m≤ 600MPa, HB≤180, unit elongation A>=22% ,-20 DEG C of low temperature impact properties>=100J.
3, steel of the present invention is after high-frequency quenching, tempering, and two-sided gross decarburization layer depth≤0.08mm, internal surface hardness reach 52 ~ 60HRC.
4, suitable finish to gauge and coiling temperature is controlled, reduce coil of strip in the two-phase region residence time, be quickly cooled to the precipitation of quasi-eutectoid perlite interval, reduce the generation of proeutectoid ferrite, guarantee is batched in rear annealing process and is not generated proeutectoid ferrite, avoid the too low formation bainite of coiling temperature simultaneously, thus reach the more how pearlitic object of formation, be easy to scale operation.
5, the present invention drag pump truck one-course concrete to carry the production method operation of tube steel is simple, production cost is lower, efficiency is high.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, is convenient to more clearly understand the present invention, but they do not form restriction to the present invention.
According to chemical element composition of the present invention, weight percent when production method requirement, four embodiments are prepared, and two comparative examples, be respectively embodiment 1, embodiment 2, embodiment 3, embodiment 4, comparative example 1, comparative example 2, namely smelt also rolling 6 batches of steel.The chemical element composition by weight percent of four embodiments and two comparative examples, process parameter and test-results are respectively in table 1, table 2 and table 3.
Chemical composition contrast (wt, %) of table 1 four embodiments and two comparative examples
The main technologic parameters contrast of table 2 four embodiments and two comparative examples
The mechanical property test Comparative result (annealed state) of table 3 four embodiments and two comparative examples
Use properties after four steel of embodiment 1 ~ embodiment 4 being carried out to normal tensile property, impact property, hardness and user's process is tested, its result: (1) annealed state steel: yield strength R
eL≤ 390MPa, tensile strength R
m≤ 590MPa, HB≤168, unit elongation A>=23.0% ,-20 DEG C of low temperature impact properties>=122J; (2) this steel plate is after high-frequency quenching+tempering, two-sided gross decarburization layer depth≤0.08mm, and internal surface hardness reaches 52 ~ 60HRC; (3) delivering concrete adopting the steel of embodiment 1 ~ embodiment 4 to make drag pump truck individual layer transfer lime, wear resisting property is excellent, often manage on average carry life-span>=40000m
3.Four embodiments and two comparative examples make the use properties of steel and the life-span as shown in table 4.
The use properties of table 4 four embodiments and two comparative examples and work-ing life
The pump truck one-course concrete that drags of the present invention carries tube steel metallurgical quality excellent, adopt revolving furnace continuous casting to add and control cooling control technology production, the steel plate thickness that operation is simple, component segregation is little, produce is even, performance is even, production cost is low, efficiency is high, is easy to scale operation.
The scientific research personnel in the technology of the present invention field can do the change of content and form unsubstantiality according to above-mentioned and do not depart from institute of the present invention essential scope, and therefore, the present invention is not limited to above-mentioned concrete embodiment.
Claims (6)
1. drag pump truck one-course concrete to carry a tube steel, it is characterized in that: the chemical element composition contained and weight percent thereof are: carbon 0.38 ~ 0.48%, silicon 0.05 ~ 0.35%, manganese 1.60 ~ 2.50%, calcium 0.0015 ~ 0.0030%, chromium 0.35 ~ 0.65%, tungsten 0.30 ~ 0.50%, erbium 0.05 ~ 0.20%, aluminium 0.015 ~ 0.045%, phosphorus≤0.010%, sulphur≤0.003%, nitrogen≤0.006%, surplus are iron and inevitable impurity.
2. the pump truck one-course concrete that drags according to claim 1 carries tube steel, it is characterized in that: the weight percent of described carbon is 0.42 ~ 0.48%.
3. the pump truck one-course concrete that drags according to claim 1 carries tube steel, it is characterized in that: the weight percent of described chromium is 0.40 ~ 0.60%.
4. drag pump truck one-course concrete to carry a production method for tube steel described in claim 1, it is characterized in that: comprise the following steps:
1) smelt, cast
Strand is prepared by described composition and weight percent, employing Production Technology for Superior Pure Steel;
2) rolling
Slab heating temperature 1220 ~ 1280 DEG C, heat-up time 180 ~ 240min, process furnace adopt reducing atmosphere; Roughing start rolling temperature 1100 DEG C ~ 1200 DEG C, roughing finishing temperature 1000 DEG C ~ 1040 DEG C, finish rolling start rolling temperature 980 DEG C ~ 1000 DEG C, finish rolling finishing temperature 860 DEG C ~ 920 DEG C;
3) cool, batch
At A
c3at DEG C temperature of+(10 ~ 25), ensure average cooling rate 50 DEG C/s ~ 100 DEG C/s, be quickly cooled to quasi-eutectoid perlite to separate out interval; Control coiling temperature Ac
1-(30 ~ 50) DEG C, up and down cooling manifold water than 1: 1.25 ~ 1: 1.50, the water yield is than 1: 1;
Wherein: A
c3for proeutectoid ferrite during heating all changes austenitic finishing temperature into;
Ac
1for perlite during heating is to the temperature of austenitic transformation;
4) anneal
After As rolled coil of strip air cooling to room temperature, be heated to 650 DEG C ~ 750 DEG C, soaking time 14 ~ 28h, below furnace cooling to 580 DEG C, air cooling of coming out of the stove is to room temperature.
5. the pump truck one-course concrete that drags according to claim 4 carries the production method of tube steel, it is characterized in that: described step 2) need before strand heating strand cooling in heap 32 ~ 48 hours.
6. the pump truck one-course concrete that drags according to claim 4 carries the production method of tube steel, it is characterized in that: described step 4) in after As rolled coil of strip air cooling to room temperature, carry out Spheroidizing Annealing through perhydro formula bell type annealing furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510390165.9A CN104911496A (en) | 2015-07-06 | 2015-07-06 | Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510390165.9A CN104911496A (en) | 2015-07-06 | 2015-07-06 | Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104911496A true CN104911496A (en) | 2015-09-16 |
Family
ID=54080934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510390165.9A Pending CN104911496A (en) | 2015-07-06 | 2015-07-06 | Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104911496A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111125957A (en) * | 2019-12-24 | 2020-05-08 | 国网河南省电力公司电力科学研究院 | Method for evaluating welding defects of thin-wall centrifugal concrete steel pipe by utilizing fracture mechanics |
| CN114686753A (en) * | 2022-04-20 | 2022-07-01 | 张家港宏昌钢板有限公司 | Method for producing 40Mn hot-rolled steel, and use thereof |
| CN116121657A (en) * | 2022-11-25 | 2023-05-16 | 重庆钢铁股份有限公司 | 50-excellent carbon steel strip with excellent tissue uniformity and production method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6230853A (en) * | 1985-08-02 | 1987-02-09 | Sumitomo Metal Ind Ltd | Perforating gun steel |
| WO2009154235A1 (en) * | 2008-06-19 | 2009-12-23 | 株式会社神戸製鋼所 | Steel for heat treatment |
| CN103173682A (en) * | 2013-04-02 | 2013-06-26 | 山西太钢不锈钢股份有限公司 | Hot rolled strip for conveying concrete and manufacturing method thereof |
| CN103882314A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | 42CrMo steel cold-rolled sheet and production method thereof |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN104294156A (en) * | 2014-09-05 | 2015-01-21 | 武汉钢铁(集团)公司 | Economic high-carbon wear resistant steel tube with excellent processing properties, and its production method |
| CN104603315A (en) * | 2012-10-19 | 2015-05-06 | 新日铁住金株式会社 | Case-hardened steel having excellent fatigue characteristics |
-
2015
- 2015-07-06 CN CN201510390165.9A patent/CN104911496A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6230853A (en) * | 1985-08-02 | 1987-02-09 | Sumitomo Metal Ind Ltd | Perforating gun steel |
| WO2009154235A1 (en) * | 2008-06-19 | 2009-12-23 | 株式会社神戸製鋼所 | Steel for heat treatment |
| CN104603315A (en) * | 2012-10-19 | 2015-05-06 | 新日铁住金株式会社 | Case-hardened steel having excellent fatigue characteristics |
| CN103882314A (en) * | 2012-12-21 | 2014-06-25 | 鞍钢股份有限公司 | 42CrMo steel cold-rolled sheet and production method thereof |
| CN103173682A (en) * | 2013-04-02 | 2013-06-26 | 山西太钢不锈钢股份有限公司 | Hot rolled strip for conveying concrete and manufacturing method thereof |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN104294156A (en) * | 2014-09-05 | 2015-01-21 | 武汉钢铁(集团)公司 | Economic high-carbon wear resistant steel tube with excellent processing properties, and its production method |
Non-Patent Citations (2)
| Title |
|---|
| 王廷溥等: "《现代轧钢学》", 31 August 2014, 冶金工业出版社 * |
| 邵潭华: "《材料工程学基础》", 31 March 2000, 西安交通大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111125957A (en) * | 2019-12-24 | 2020-05-08 | 国网河南省电力公司电力科学研究院 | Method for evaluating welding defects of thin-wall centrifugal concrete steel pipe by utilizing fracture mechanics |
| CN114686753A (en) * | 2022-04-20 | 2022-07-01 | 张家港宏昌钢板有限公司 | Method for producing 40Mn hot-rolled steel, and use thereof |
| CN116121657A (en) * | 2022-11-25 | 2023-05-16 | 重庆钢铁股份有限公司 | 50-excellent carbon steel strip with excellent tissue uniformity and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6502499B2 (en) | Yield strength 900 to 1000 MPa grade tempered high strength steel and method for producing the same | |
| CN102666897B (en) | High-toughness abrasion-resistant steel | |
| CN101440461B (en) | A kind of oil well gas corrosion-resistant sucker rod steel and its manufacturing method | |
| CN103526111B (en) | Hot-rolled plate band steel with yield strength being 900MPa and preparation method thereof | |
| CN113862558B (en) | Low-cost high-toughness high-strength tempered steel with yield strength of 700MPa and manufacturing method thereof | |
| CN102912228B (en) | Economical high-strength low-yield-ratio pipe fitting steel and production method thereof | |
| CN102912250B (en) | Economical low-yield-ratio pipe fitting steel for oil and gas transmission and production method thereof | |
| WO2021104417A1 (en) | Carbon steel and austenitic stainless steel rolling clad plate and manufacturing method therefor | |
| CN105543676B (en) | A kind of martensite ferrite dual phase wear-resisting steel plate and preparation method thereof | |
| CN102251170A (en) | Ultrahigh-strength bainitic steel and manufacture method thereof | |
| CN111479945A (en) | Wear-resistant steel having excellent hardness and impact toughness and method for manufacturing same | |
| CN106498294A (en) | A kind of high-level low-alloy wear-resistant steel of NM600 and its application | |
| CN102534403A (en) | Bainite heat-treated steel rail and heat treatment method thereof | |
| CN107130172B (en) | 400HBW grades of Brinell hardness whole constrictive type high tenacity easily weld special thick wear-resisting steel plate and its manufacturing method | |
| CN104451446B (en) | Thick-gauge, high-strength and high-toughness bainite engineering steel and production method thereof | |
| CN108018488A (en) | A kind of CT110 grades of connecting pipes hot rolled strip and production method | |
| CN112813344A (en) | High-strength high-toughness easy-to-weld structural steel plate with yield strength of 620MPa and preparation method thereof | |
| CN108531832A (en) | 800 MPa-grade high-yield-ratio cold-rolled steel plate and manufacturing method thereof | |
| CN109385570B (en) | High-strength steel plate and manufacturing method thereof | |
| CN112877591A (en) | High-strength and high-toughness steel for hardware tool and chain and manufacturing method thereof | |
| CN114134431B (en) | 2000 Mpa-grade high-strength high-toughness high-hardenability spring steel by square billet continuous casting and rolling and manufacturing method thereof | |
| CN104911496A (en) | Steel for single-layer concrete conveying pipe of trailer pump vehicle and production method thereof | |
| CN104294156B (en) | A kind of economy the excellent high-carbon wear-resistant steel pipe of processing characteristics and production method | |
| JP2000160300A (en) | 655 Nmm-2 CLASS LOW-C HIGH-Cr ALLOY OIL WELL PIPE WITH HIGH CORROSION RESISTANCE, AND ITS MANUFACTURE | |
| CN109207851B (en) | Ultrahigh-strength steel plate and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150916 |
|
| RJ01 | Rejection of invention patent application after publication |