CN1053228C - Low-alloy wear-resistant cast steel pipe and casting method thereof - Google Patents
Low-alloy wear-resistant cast steel pipe and casting method thereof Download PDFInfo
- Publication number
- CN1053228C CN1053228C CN95112491A CN95112491A CN1053228C CN 1053228 C CN1053228 C CN 1053228C CN 95112491 A CN95112491 A CN 95112491A CN 95112491 A CN95112491 A CN 95112491A CN 1053228 C CN1053228 C CN 1053228C
- Authority
- CN
- China
- Prior art keywords
- cast
- steel pipe
- low
- alloy
- steel
- 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.)
- Expired - Fee Related
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 28
- 239000000956 alloy Substances 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 14
- 238000005266 casting Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 21
- 229910052796 boron Inorganic materials 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 14
- 239000011651 chromium Substances 0.000 claims description 14
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 10
- 239000011572 manganese Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910001563 bainite Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims 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 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- 238000005272 metallurgy Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 abstract 1
- 238000009750 centrifugal casting Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- 238000003756 stirring Methods 0.000 description 7
- 238000005275 alloying Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910000599 Cr alloy Inorganic materials 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 239000000788 chromium alloy Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000616 Ferromanganese Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 235000019628 coolness Nutrition 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012384 transportation and delivery Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- -1 therefore Chemical compound 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The low-alloy wear-resisting cast steel pipe consists of pipe body and flanges welded to two ends, and has medium and small caliber and thin wall and chemical components of Cr, Ni, Mn, Si, C, B, Fe, etc. During smelting, proper amount of Ni and Cr elements, B, Fe and Mn are added and regulated to required component range, and the centrifugal casting process can produce cast steel pipe with high wear resistance and excellent weldability for conveying coal powder and ash, sand, slurry, etc. in mine, metallurgy, civil engineering, environment protection and other industries.
Description
The present invention relates to a kind of low-alloy wear-resistant steel pipe and castmethod thereof, belong to casting technology field.
At present, both at home and abroad at the many large sized complete sets of equipments of industries such as electric power, mine, metallurgy, civil construction, environmental protection and the key position of device, a large amount of pipelines have all been adopted, these class pipeline great majority all are long-term military services continuously, Working environment is very abominable, delivery medium is that lime-ash, sandstone, mud etc. contain sharp-pointed solid material, and wear resistance requires very high.The coal dust transfer lime and the ash releasing tube that use of fuel-burning power plant for example, have former be that the general steel plate spiral rolls and is welded, wear resistance and work-ing life are very restricted, and only use 1-2 just worn out.Therefore, relevant industry is all being sought a kind of abrasion-proof pipe both at home and abroad, and this class pipeline generally belongs to long tube, and the centre welds, and this just requires this pipeline not only to have high-strength wear resistance but also have good weldability.Given this, making a kind of wearable cast steel pipe replacement ordinary steel coiled sheet welded tube is to be worth experimental study.
One of existing casting wear-resistant steel casting most effectual way is to add alloying element in cast steel.Use maximum alloying elements that chromium, nickel, molybdenum, manganese, nitrogen, vanadium, titanium, copper, tungsten, aluminium, zirconium, silicon etc. are arranged, these elements all can form the carbide of high rigidity with the carbon in the cast steel, make high alloy cast steel, thereby improve wear resisting property.But the alloy deal that adds is more, costs an arm and a leg, and cost is higher.
Up to now, centre spinning method is generally all adopted in the production of long cast-steel pipe.This method came across for 19th century, just was committed to industrialness production in 20 beginnings of the century, and 1938, Germany produced the Centrifugal Steel pipe first.Because molten steel solidifies under centrifugal action, body dense structure not only, and can make slag, impurity emersion from molten steel, make molten steel before solidifying, be purified.The production technology of Centrifugal Steel pipe is through semicentennial experimental study and development accumulation, constantly ripe and perfect, but the long wearable cast steel pipe of small-bore thin-walled in producing, remain the problem that studies for a long period of time about producer both at home and abroad, and wear resistance and weldability possess in cast-steel pipe simultaneously, and this also is difficult to grope.
The objective of the invention is to make a kind of low-alloy wear-resistant steel pipe, a kind of castmethod of this pipe is provided, improve the wear resisting property of the cast-steel pipe that is used in above-mentioned industry, double at least than former ordinary steel coiled sheet welded tube work-ing life, and welding property is good, convenient welding is made, and reaches wear resistance and other mechanical properties of high alloy cast-steel pipe.
Technical scheme of the present invention is as follows:
The flange that this pipe is joined weldering by body and two ends is formed (also can be unworthy of flange, adopt flexible the connection), in small-bore (Φ 500-Φ 80mm), thin-walled (25-12mm), long straight tube (4-6m) or bend pipe, threeway, four-way, longer pipe is formed by the more piece seam, outside surface pitching or other impregnating material.It is characterized in that wear resistance and weldability are good, Rockwell hardness HRC35-47, metallographic structure is low-alloy bainite (55-60%) and sorbite (40-45%) coexistence, its composition range is (%): carbon 0.20.4, silicon≤0.4, manganese 0.8-2.0, chromium 1.0-2.5, nickel 0.8-1.5, boron 0.0046-0.005, sulphur≤0.04, phosphorus≤0.04, surplus are iron and unavoidable impurities element.
During melting, can adopt electric arc furnace or induction furnace, preferably select induction furnace for use, its easy to operate, easy control.Can reach 1.5 tons because length is the medium caliber thin-walled cast-steel pipe maximum weight of 5-6m, small-bore pipe is less than 0.5 ton, so the former selects 1.5 tons of electric arc furnace for use, the latter selects 430 kilograms of medium-frequency induction furnaces for use.
During melting, the raw material of the alloying element of adding, wherein chromium, nickel two elements adopt ferrochrome, Rhometal, also can adopt stainless steel smear metal or tailings such as 1Cr18Ni9Ti, OCr18Ni12Mo2Ti, OCr25Ni20, and boron, manganese adopt iron alloy.The method of its melting and processing molten steel is: nickel, chromium alloy material are added at the bottom of the smelting furnace earlier, add the carbon steel material or the pig iron again, various charge compositions are determined according to nickel, the chromium content of nickel, chromium alloy material, treat that furnace charge all melts the back sampling analysis, add ferro-boron, manganeseirom according to analytical results, if chromium, nickel content are lower than aforementioned range, then add nickel, chromium alloy material again; Be higher than aforementioned range, then add the carbon steel material again, it is qualified so composition to be adjusted.The content of chromium, nickel, boron, manganese is lower than aforementioned range, and is not remarkable to the wear resisting property that improves cast-steel pipe; Be higher than aforementioned range, though favourable to the wear resisting property that improves cast-steel pipe, weldability is brought disadvantageous effect, increase cost again, manganese, the too high comprehensive mechanical property that also may damage this cast-steel pipe of boron content.The qualified back of composition aluminum deoxidation stirs, skims, and temperature rise is come out of the stove to 1620-1640 ℃.Liquid steel temperature is low excessively, will be unfavorable for adding the alloying of element; Too highly will increase unnecessary energy consumption.The molten steel of coming out of the stove adds that thermal-insulating covering agent is promptly pourable.
The contained alloying element of the present invention role in cast steel can be divided into two classes, one class is to promote that strongly bainite forms in the cast steel, make cast steel under as-cast condition, obtain the bainite matrix of even compact, simultaneously, this dvielement is melted in the matrix, the wear resisting property that strengthens cast-steel pipe is played conclusive effect, and this dvielement has chromium, manganese, boron.
Chromium has crystal grain thinning, anti-oxidant, corrosion resistant effect, and its ability of strengthening matrix is very big.
Manganese is a kind of common alloy elements that improves intensity, hardness and wear resistance, and its effect of strengthening matrix is also very big, but manganese coarsened grain to some extent in the low-alloy scope, and the foundry goods wear resisting property increases and reduces with manganese content.So manganese content of the present invention (%) is controlled at 0.8～2.0.
Boron is a kind of element of strong raising hardening capacity, adds small amount of boron in cast steel, can significantly improve wear resisting property and comprehensive mechanical property.
Another kind of element mainly plays a part to go bad with purify hot metal, improves welding property, and this dvielement is a nickel.
Nickel had both improved intensity in cast steel, strengthen hardness, strengthened toughness again, improved the casting corrosion resistant performance simultaneously again.But the too high wear resistance that will reduce cast-steel pipe of the content of nickel, therefore, nickel content of the present invention (%) is controlled at 0.8-1.5.
The present invention's long cast-steel pipe adopts rotary casting, utilizes afterheat in casting to heat-treat.Its cast wall thickness is chosen as 30-60mm, and the medium caliber pipe is got big value, and large-diameter pipe gets the small value, and this considers that mainly the intensity of cast self and it are to factors such as the cooling intensity of molten steel, temperature distortions.Cast will be cleaned out and preheating before using, and sprayed brown corundum coating or other thermal insulations are good, refractoriness is high coating at inwall then, sprayed thickness and determined according to the specification of cast tube, generally was controlled in the 1-2mm scope.Teeming temperature is controlled at 1600-1620 ℃, and pouring speed is suitable fast, generally is controlled at 20-30kg/s according to casting ladle and the structure of watering cup.The cast rotating speed is got gravitation multiple G=60-70, and rotating speed is favourable to the cast tube that obtains even compact soon, splashes but rotating speed easily causes cast vibration and molten steel too soon.When liquid steel temperature is reduced to about 1300 ℃, be when solidifying with half curdled appearance, beginning is to the cast chilling of spraying water, wait to drop to 900 ℃ of left and right sides stop-spraying air coolings, the temperature that cast tube is extracted cast is controlled at 400-600 ℃, and calcining temperature is too high, easily make the cast tube distortion, calcining temperature is too low, and the heat that sheds through cast increases, and causes cast to occur fatigue cracking earlier.Use above-mentioned casting and heat treating method can obtain the wearable cast steel pipe of as-normalized condition.
The present invention compares with former ordinary steel coiled sheet welded tube, seamless tube, the hardness height, improved wear-resisting, corrosion resisting property, dry coal powder on probation is carried and ash discharge through thermal power plant, life-span has prolonged more than one times than former pipe, and welding property is good, does not need preheating, available plain carbon stool or low-alloy steel electrode weld, and have avoided the disadvantage of high alloy cast steel welding property difference.The alloying element abundant raw material that it is selected has been utilized the smear metal waste material and the tailing of factory again, has reduced manufacturing cost.The present invention can be used for industry ash-slag deliveries such as electric power, mine, metallurgy, civil construction, environmental protection, the tubing system of sandstone, mud.
Accompanying drawing 1 is a straight tube sectional view of the present invention;
Accompanying drawing 2 is 90 ° of bend pipe sectional views of the present invention.
1 liang of joint of straight tube body or more piece butt joint seam, weldering flange 2,3 circumferential welds are joined at two ends, and 4 is fillet weld.
General no circumferential weld in the middle of the bend pipe is joined weldering flange 2 and is got final product at the two ends of bent tubular body 5.
Embodiment 1: is used for the fuel-burning power plant coal dust and carries and the ash discharge straight tube, and internal diameter Φ 300mm, wall thickness 14mm, long 5m, two straight tube butt joint seam, the weldering flange is joined at two ends, the outside surface asphalt-coating.The employing capacity is the melting of 430kg intermediate frequency furnace, and every stove waters one.Add stainless steel smear metal 30kg earlier and place furnace bottom, add carbon steel material 270kg then, pig iron 5kg, after treating all fusings, stirring, sampling analysis add B51 ferro-boron 200g again, No. 1 ferromanganese 1.2kg (basic lining), chromium, nickel composition are in scope, so no longer add the stainless steel material.Add aluminium block 0.3kg deoxidation after the stirring, fully stir, skim, be warmed up to 1630 ℃ and come out of the stove, add the perlite powder insulation and cover.The tapping analysis result that comes out of the stove is (%):
Carbon 0.23 silicon 0.35 manganese 1.08 chromium 1.98 nickel 1.22 phosphorus 0.024 sulphur 0.023 boron 0.0046
Pour into a mould on centrifugal tube casting machine, cast is of a size of: external diameter Φ 395mm, internal diameter Φ 335mm, useful length 2.55m.Inwall sprays the thick brown corundum coating of 1.5mm, 1600 ℃ of teeming temperatures, pouring speed 30kg/s, gravitation multiple G=65, when liquid steel temperature was reduced to 1300 ℃, beginning was to cast shower cooling water, wait to reduce to 900 ℃ of stop-spraying air coolings, demoulding tube drawing during to 600 ℃ is through the mechanical property test of coupon, yield strength 585MPa, tensile strength 952MPa, impact value 16J, Rockwell hardness HRC=42, metallographic structure is 55% bainite and the coexistence of 45% sorbite.Prolong one times or more than raw steel coiled sheet welded tube work-ing life.
Embodiment 2: the coal dust in fuel-burning power plant carry and ash discharge with 90 ° of bend pipes, internal diameter Φ 300mm, wall thickness 14mm, the weldering flange is joined at two ends, the outside surface asphalt-coating.Adopt 430 kilograms of medium-frequency induction furnaces during melting, two of every stove cast.Add stainless steel smear metal 46kg earlier and place furnace bottom, add carbon steel material 375kg then, pig iron 6kg is after treating all to melt, stir, sampling analysis adds 1352 ferro-boron 270g again, No. 1 ferromanganese 2kg (acid lining), chromium, nickel composition are in scope, so no longer add the stainless steel material.Add aluminum strip 0.4kg deoxygenation refining after the stirring again, fully stir, skim, be warming up to 1640 ℃ and come out of the stove, add the rice-straw ash insulation and cover.The molten steel composition of coming out of the stove is (%):
Carbon 0.28 silicon 0.36 manganese 1.55 chromium 1.9 nickel 1.46 phosphorus 0.005 sulphur 0.023 boron 0.016
Use sand casting process, its mechanical property is: yield strength 569MPa, tensile strength 943MPa, impact value 14,8J, Rockwell hardness HRC=39.Metallographic structure is 58% bainite and the coexistence of 42% sorbite.
Claims (2)
1. low-alloy wear-resistant steel pipe, joined the flange of weldering is made up of body and two ends, bore Φ 500～Φ 80mm, wall thickness 25～12mm, long straight tube or the bend pipe of 4～6m, threeway, four-way, chemical ingredients comprises carbon, silicon, manganese, iron, it is characterized in that Rockwell hardness HRC35～47, metallographic structure is low-alloy bainite (55～60%) and sorbite (40～45%) coexistence, its composition also comprises chromium, nickel, boron, composition range is (%): carbon 0.2～0.4, silicon≤0.4, manganese 0.8～2.0, chromium 1.0～2.5, nickel 0.8～1.5, boron 0.0046～0.005, sulphur≤0.04, phosphorus≤0.04, surplus are iron and unavoidable impurities element.
2. the castmethod of the long cast-steel pipe of low-alloy abrasion-proof according to claim 1, adopt rotary casting, it is characterized in that the cast wall thickness is 30～60mm, inwall sprays thick brown corundum coating of 1～2mm or the coating that other thermal insulations are good and refractoriness is high, 1600～1620 ℃ of teeming temperatures, pouring speed 20～30kg/s, the cast rotating speed is got gravitation multiple G=60～70, and the temperature that cast tube is extracted cast is controlled at 400～600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112491A CN1053228C (en) | 1995-10-20 | 1995-10-20 | Low-alloy wear-resistant cast steel pipe and casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112491A CN1053228C (en) | 1995-10-20 | 1995-10-20 | Low-alloy wear-resistant cast steel pipe and casting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1149083A CN1149083A (en) | 1997-05-07 |
| CN1053228C true CN1053228C (en) | 2000-06-07 |
Family
ID=5079562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95112491A Expired - Fee Related CN1053228C (en) | 1995-10-20 | 1995-10-20 | Low-alloy wear-resistant cast steel pipe and casting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053228C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058060C (en) * | 1998-03-27 | 2000-11-01 | 河北电力设备厂 | As-cast wear resisting steel for thermal power plant and its producing method |
| WO2005060311A1 (en) | 2003-11-25 | 2005-06-30 | Kyocera Corporation | Ceramic heater and method for manufacture thereof |
| CN100364693C (en) * | 2006-08-22 | 2008-01-30 | 中国船舶工业股份有限公司 | Casting method for exhaust branch pipe of thin-wall ball iron triplet |
| CN103215520A (en) * | 2012-01-19 | 2013-07-24 | 林州重机铸锻有限公司 | Scraper corrosion-resistant ledge casting material |
| CN103223576A (en) * | 2013-04-08 | 2013-07-31 | 苏州益维特机械制造有限公司 | Manufacturing process of rotating mandrel of rotor drying machine |
| CN103978175B (en) * | 2014-05-22 | 2016-01-27 | 江苏双勤民生冶化设备制造有限公司 | A kind of threeway and vertical centrifugal casting methods and applications thereof |
| CN103978176B (en) * | 2014-05-22 | 2016-03-16 | 江苏双勤民生冶化设备制造有限公司 | A kind of 180 ° of elbows and vertical centrifugal casting methods and applications thereof |
| CN106987770B (en) * | 2017-04-19 | 2018-08-14 | 陕西华通机电制造有限公司 | A kind of small-bore deep tube cavity processing technology |
| CN108149143A (en) * | 2018-02-09 | 2018-06-12 | 四川省达州钢铁集团有限责任公司 | A kind of thin-walled high temperature resistant cast-steel pipe and preparation method thereof |
| CN108220786A (en) * | 2018-02-09 | 2018-06-29 | 四川省达州钢铁集团有限责任公司 | A kind of thin-walled abrasion resistant cast steel pipe and preparation method thereof |
| CN113941694B (en) * | 2020-07-15 | 2023-08-11 | 四川维珍高新材料有限公司 | Centrifugal casting method of large-caliber wear-resistant cast iron pipe |
| CN112404894B (en) * | 2020-10-26 | 2022-03-01 | 英特派铂业股份有限公司 | Preparation method of large length-diameter ratio, small-caliber and ultrathin platinum or platinum-rhodium alloy crucible |
| CN113058694B (en) * | 2021-03-19 | 2022-10-14 | 河北津西钢铁集团重工科技有限公司 | Semi-steel composite roller sleeve and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1659523A1 (en) * | 1989-07-31 | 1991-06-30 | Производственное Объединение "Гомсельмаш" | Cast steel |
-
1995
- 1995-10-20 CN CN95112491A patent/CN1053228C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1659523A1 (en) * | 1989-07-31 | 1991-06-30 | Производственное Объединение "Гомсельмаш" | Cast steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1149083A (en) | 1997-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111004980B (en) | Vanadium-chromium microalloyed large-size 600MPa ultrafine-grain high-toughness corrosion-resistant anti-seismic steel bar and preparation method thereof | |
| CN100587098C (en) | Micro-alloying steel for oil gas transport seamless pipeline and its preparation method | |
| CN101537427B (en) | Centrifugal casting high-chromium cast iron composite roller and preparation method thereof | |
| CN1053228C (en) | Low-alloy wear-resistant cast steel pipe and casting method thereof | |
| CN100453681C (en) | A kind of high boron wear-resistant cast steel and preparation method thereof | |
| CN100441364C (en) | High ductility buried arc welding wire for low-alloy super-strength steel | |
| CN111101066B (en) | Steel wire rod for bainite high-strength welding wire and production method thereof | |
| CN100453686C (en) | Cast high-boron wear-resistant stainless steel containing high-hardness borides and preparation method thereof | |
| CN111101065B (en) | High-strength corrosion-resistant high-temperature-resistant welding wire steel and production method thereof | |
| CN111172460B (en) | Steel wire rod for 600 MPa-level yield strength welding wire and production method thereof | |
| CN104726790B (en) | Method for manufacturing seamless pipeline pipe from low-carbon martensite pulp conveying wear-resistant seamless pipeline steel | |
| CN109280852A (en) | A kind of big thickness NM500 abrasion-resistant stee and production method | |
| CN101254527A (en) | Method for producing low-carbon bainitic high-strength steel based on thin slab continuous casting and rolling process | |
| KR20150036787A (en) | Abrasion resistant steel plate with super-high strength and high toughness, and process for preparing same | |
| CN103789677B (en) | High-strength steel bar with high corrosion resistance and preparation method thereof | |
| CN101481779A (en) | High plasticity, high tenacity and ultra-high tensile steel, and manufacturing method thereof | |
| Metlitskii | Flux-cored wires for arc welding and surfacing of cast iron | |
| CN102400062B (en) | Low yield ratio and ultrahigh strength X130 pipeline steel | |
| CN110079745A (en) | A kind of the HB400 grade wear-resisting steel plate and preparation method of press quenching | |
| CN111500920A (en) | HRB600 high-strength anti-seismic deformed steel bar and production method thereof | |
| CN103266263A (en) | Manufacturing method of wear-resisting elbow of concrete pump truck cantilever | |
| CN110699598A (en) | A kind of niobium microalloyed high strength and high weathering angle steel and its production process | |
| CN1202533A (en) | High strength high toughness steel for mooring chain and production method of mooring chain | |
| CN101020279A (en) | Gas protected welding wire in 600 MPa level | |
| CN101519752A (en) | High strength and toughness pipeline steel roll in low-carbon and high-niobium-chromium system and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |