CN102330850A - Bimetal centrifugal composite pipe and preparation method thereof - Google Patents
Bimetal centrifugal composite pipe and preparation method thereof Download PDFInfo
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- CN102330850A CN102330850A CN201110223221A CN201110223221A CN102330850A CN 102330850 A CN102330850 A CN 102330850A CN 201110223221 A CN201110223221 A CN 201110223221A CN 201110223221 A CN201110223221 A CN 201110223221A CN 102330850 A CN102330850 A CN 102330850A
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- 239000002131 composite material Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 13
- 239000010962 carbon steel Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 229910052796 boron Inorganic materials 0.000 claims description 26
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009750 centrifugal casting Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 15
- 229910001018 Cast iron Inorganic materials 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 8
- 229910052804 chromium Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001175 rotational moulding Methods 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a Cr-free high-boron iron-based wear-resistant bimetal composite pipe and a preparation method thereof, belonging to the manufacturing field of metal wear-resistant materials. The inner layer (a wear-resistant layer) of the composite pipe is made of a Cr-free high-boron iron-based wear-resistant alloy, and the outer layer (a malleable layer) of the composite pipe is made of carbon steel. Based on a centrifugal casting method, the outer layer (the malleable layer) of the composite pipe is cast firstly, and then the inner layer (the wear-resistant layer) of the composite pipe is cast, thus the overall combinability is better, the service life is long, the production cost is low and the process is simple.
Description
Technical field
The present invention relates to the centrifugal composite pipe preparation method of double-fluid double metal of high ferro-boron based wear-resistant alloy of a kind of Cr of nothing and carbon steel, belong to metal wear resistant material and make the field.
Background technique
In industries such as electric power, mine, metallurgy, because remote, the high-pressure delivery of material, output, therefore pipeline is bearing sizable pressure, and stands very serious wearing and tearing, and single material pipeline is difficult to satisfy the requirement of this operating mode.
Patent CN2547988Y has announced a kind of composite bimetal pipe that is used for industry such as oil, chemical industry; This patent is through filling the metallurgy combination that brazing layer is realized parent tube and bushing pipe between parent tube and bushing pipe, the parent tube that has solved various mechanical applying manufactured composite bimetal pipes existence combines unstable problem with bushing pipe.But the method for preparing this kind composite pipe is comparatively complicated.
Patent CN201680070U discloses a kind of novel high chrome molybdenum composite bimetal pipe.It adopts the bimetal composite structure, and outer this patent has been given full play to the wear-resisting property of rich chromium cast iron, has prolonged working life for steel pipe, internal layer are rich chromium cast iron, but this composite pipe is a rich chromium cast iron, has increased the cost of production of composite pipe.
Patent CN201428891Y discloses a kind of bimetal wear resistant composite-curve, its cross section sub-circular, and this bend pipe contains the wearing layer of outer field carbon steel layer and internal layer; The wearing layer wall thickness in the described bend pipe outside is greater than the wearing layer wall thickness of inboard; This composite pipe combination property is high, has solved single material and has been difficult to be in harmonious proportion the contradiction of weldability and wear resistance, has increased working life; But its wearing layer is a rich chromium cast iron, and cost is high, preparation process is complicated.
Using more composite bimetal pipe at present has steel-rich chromium cast iron composite bimetal pipe, and the outer common steel tube that adopts of straight tube forms the rich chromium cast iron liner through rotational molding technology and is composited.This pipeline is compared with antiwear cast iron alloy, wear-resistant alloy cast steel, steel-ceramic composite pipe and glass-ceramic tubre that tradition is used, has advantages such as wear-resisting property is good.But the rich chromium cast iron that the liner of composite pipe adopts has increased cost of production.
So, if in alloy not added elements Cr, Mo, V, only add cheap boron, in ferrous alloy, obtain the Fe of high hardness, high stability
2B and boron-carbide can improve the wear resistance of alloy.But,, can reduce greatly its working life because boride is hard and crisp.Therefore adopt centrifugal compound preparation not have the centrifugal composite pipe of double-fluid double metal of high ferro-boron based wear-resistant alloy of Cr and carbon steel, the high ferro-boron based wear-resistant alloy of no Cr is the composite pipe internal layer, and carbon steel is outer.Centrifugal complex technique can make bimetal in casting cycle, realize metallurgy combination effectively, prepares good, the good composite bimetal pipe of internal layer wear resistance of a kind of outer toughness.This high ferro-boron based wear-resistant alloy of no Cr composite bimetal pipe cheap, function admirable is not seen the correlation technique report.
Summary of the invention
The object of the invention is to provide centrifugal composite pipe of a kind of bimetal and preparation method thereof, and with the internal layer of the high ferro-boron based wear-resistant alloy of no Cr as composite pipe, carbon steel is as the skin of composite pipe, a kind of cheap double-fluid double metal composite pipe of preparation.
The centrifugal composite pipe of bimetal of the present invention is made up of with outer internal layer, and internal layer is the high ferro-boron based wear-resistant alloy of no Cr, and concrete alloy compositions weight percentage is: C 0.3～1.0%; B 1.0～4.5%, and Si 0.3～0.4%, and Mn 0.2～0.4%; S＜0.05%, P＜0.05%, all the other are Fe; Skin is a carbon steel.
The present invention realizes that the technological scheme that above-mentioned purpose is taked is: adopt centrifugal complex technique, earlier with the skin of carbon steel cast composite pipe, pour into a mould the internal layer of composite pipe then with the high ferro-boron base alloy of no Cr.Concrete steps of the present invention are following:
(1) skin of the centrifugal composite pipe of preparation bimetal: put into the smelting furnace melting with steel scrap as raw material, control molten steel chemical composition is in carbon steel carbon content 0.3～0.6% scope, and Kohlenstoffgehalt is adjusted through recarburizer or low carbon steel; After treating that molten steel melts clearly; Al with molten steel weight 0.1～0.3% carries out deoxidation, skims back 1540 ℃～1580 ℃ and comes out of the stove, and carries out the skin of centrifugal pressure casting composite pipe; The linear velocity of centrifuge is: 8～30m/s, cast thickness is 15～40mm.
(2) internal layer of the centrifugal composite pipe of preparation bimetal: steel scrap is put into the smelting furnace melting; Treat that the molten clear back of molten steel adds ferro-boron and continues melting, control molten steel composition weight percentage is C 0.3～1.0%, B 1.0～4.5%, Si 0.3～0.4%, Mn 0.2～0.4%, S＜0.05%, P＜0.05%, all the other are Fe; After dissolving clearly once more, the Al that adds molten steel weight 0.1～0.3% carries out deoxidation, comes out of the stove at 1550 ℃～1600 ℃ in the back of skimming; Leave standstill, naturally cool to 1450 ℃～1500 ℃ after coming out of the stove, behind tubing 10～100s blanking time that obtains in the middle of the step (1), carry out the centrifugal pressure casting of internal layer, the linear velocity of centrifuge is: 8～30m/s, cast thickness is 5～20mm.
The control of each constituent content such as said carbon adopts conventional method to carry out.As, the control of Kohlenstoffgehalt is carried out through the method that adds the pig iron or low carbon steel.
The present invention compared with prior art has following characteristics:
(1) China's boron element reserves are abundant, and are cheap, add element with B as main alloy and prepare the wear-resisting of composite pipe
Layer will reduce production costs greatly;
(2) carbon steel is the skin of composite pipe, has good impact resistance, and under action of centrifugal force, internal and external layer can
The realization excellent metallurgical combines, and helps the raising in composite pipe life-span;
(3) production technology is simple, and manufacturing cycle is short, and is easy to utilize.
Embodiment
Embodiment 1:
(1) skin of the centrifugal composite pipe of preparation bimetal: put into the intermediate frequency furnace melting as raw material with steel scrap; Detecting the molten steel carbon content is 0.2%, and adding pig iron adjustment Kohlenstoffgehalt is 0.3%, treat molten steel molten clear after; Add the Al deoxidation of molten steel weight 0.1%; Skim back 1540 ℃ and come out of the stove and carry out the skin of centrifugal pressure casting composite pipe, this moment, the linear velocity adjusted of centrifuge was: 8m/s, cast thickness is 15mm.
(2) internal layer of the centrifugal composite pipe of preparation bimetal: with steel scrap melting in intermediate frequency furnace; Treat that the molten clear back of molten steel adds ferro-boron and continues melting; Use conventional method control molten steel chemical composition to be C 0.3%, B 4.5%, Si 0.35%, Mn 0.2%, S 0.03%; P 0.04%, and all the other are Fe (weight percentage); After dissolving clearly once more, the Al that adds molten steel weight 0.1% carries out deoxidation, comes out of the stove at 1550 ℃ in the back of skimming; Leave standstill, naturally cool to 1450 ℃ after coming out of the stove, behind tubing 10s blanking time that obtains in the middle of the step (1), carry out the centrifugal pressure casting of internal layer, this moment, the linear velocity of centrifuge was 8m/s, and cast thickness is 5mm.
Embodiment 2:
(1) skin of the centrifugal composite pipe of preparation bimetal: put into the intermediate frequency furnace melting as raw material with steel scrap; Detect and find that the molten steel carbon content is 0.45%; Treat that the Al that the molten clear back of molten steel adds molten steel weight 0.2% carries out deoxidation; Skim back 1560 ℃ and come out of the stove and carry out the skin of centrifugal pressure casting composite pipe, this moment, the linear velocity of centrifuge was adjusted into: 15m/s, cast thickness is 30mm.
(2) internal layer of the centrifugal composite pipe of preparation bimetal: steel scrap is put into the intermediate frequency furnace melting; Treat that the molten clear back of molten steel adds ferro-boron and continues melting; Use conventional method control molten steel composition weight percentage to be C 0.65%, B 2.2%, Si 0.3%, Mn 0.28%, S 0.04%; P 0.03%, and all the other are Fe; After dissolving clearly once more, the Al that adds molten steel weight 0.2% carries out deoxidation, comes out of the stove at 1580 ℃ in the back of skimming; Leave standstill, naturally cool to 1480 ℃ after coming out of the stove, behind tubing 60s blanking time that obtains in the middle of the step (1), carry out the centrifugal pressure casting of internal layer, this moment, the linear velocity of centrifuge was 15m/s, and cast thickness is 15mm.
Embodiment 3:
(1) skin of the centrifugal composite pipe of preparation bimetal: put into the intermediate frequency furnace melting as raw material with steel scrap; Find that through monitoring the molten steel carbon content is 0.7%, adding low carbon steel adjustment carbon content is 0.6%, treat molten steel molten clear after; The Al that adds molten steel weight 0.3% carries out deoxidation; Skim back 1580 ℃ and come out of the stove and carry out the skin of centrifugal pressure casting composite pipe, this moment, the linear velocity of centrifuge was adjusted into: 30m/s, cast thickness is 40mm.
(2) internal layer of the centrifugal composite pipe of preparation bimetal: steel scrap is put into the intermediate frequency furnace melting; Treat that the molten clear back of molten steel adds ferro-boron and continues melting; Use conventional method control molten steel composition weight percentage to be C 1.0%, B 1.0%, Si 0.4%, Mn 0.4%, S 0.04%; P 0.02%, and all the other are Fe; After dissolving clearly once more, the Al that adds molten steel weight 0.3% carries out deoxidation, comes out of the stove at 1600 ℃ in the back of skimming; Leave standstill, naturally cool to 1500 ℃ after coming out of the stove, behind tubing 100s blanking time that obtains in the middle of the step (1), carry out the centrifugal pressure casting of internal layer, this moment, the linear velocity of centrifuge was 30m/s, and cast thickness is 20mm.
Claims (4)
1. centrifugal composite pipe of the high ferro-boron base of no Cr abrasion-proof duplex metal is characterized in that: be made up of with outer internal layer, skin is a ductile layers, and internal layer is a wearing layer, and the cladding material of composite pipe is a carbon steel, and the internal layer of composite pipe is the high ferro-boron based wear-resistant alloy of no Cr.
2. the chemical component weight hundred of the centrifugal composite pipe internal layer of no Cr according to claim 1 high ferro-boron base abrasion-proof duplex metal
Proportion by subtraction is: C 0.3～1.0%, and B 1.0～4.5%, and Si 0.3～0.4%, and Mn 0.2～0.4%, S＜0.05%, and P＜0.05%, all the other are Fe.
3. a preparation method who does not have the centrifugal composite pipe of Cr high ferro-boron base abrasion-proof duplex metal is characterized in that: pour into a mould carbon steel earlier as the composite pipe internal layer, and then at the high ferro-boron base of the body internal layer no Cr of cast internal layer, obtain composite bimetal pipe.
4. according to the preparation method of the centrifugal composite pipe of claims 3 described no Cr high ferro-boron base abrasion-proof duplex metals, it is characterized in that: concrete preparation process is following:
(1) skin of the centrifugal composite pipe of preparation bimetal: put into the smelting furnace melting as raw material with steel scrap; Control molten steel chemical composition in carbon steel carbon content 0.3～0.6% scope, treat molten steel molten clear after, carry out deoxidation with the Al of molten steel weight 0.1～0.3%; Come out of the stove at 1540 ℃～1580 ℃ after skimming; Carry out the skin of centrifugal pressure casting composite pipe, the linear velocity of centrifuge is: 8～30m/s, and cast thickness is 15～40mm;
(2) internal layer of the centrifugal composite pipe of preparation bimetal: steel scrap is put into the smelting furnace melting; Treat that the molten clear back of molten steel adds ferro-boron and continues melting, control molten steel composition weight percentage is C 0.3～1.0%, B 1.0～4.5%, Si 0.3～0.4%, Mn 0.2～0.4%, S＜0.05%, P＜0.05%, all the other are Fe; After dissolving clearly once more, the Al that adds molten steel weight 0.1～0.3% carries out deoxidation, comes out of the stove at 1550 ℃～1600 ℃ in the back of skimming; Leave standstill, naturally cool to 1450 ℃～1500 ℃ after coming out of the stove, behind tubing 10～100s blanking time that obtains in the middle of the step (1), carry out the centrifugal pressure casting of internal layer, the linear velocity of centrifuge is: 8～30m/s, cast thickness is 5～20mm.
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| CN201110223221A CN102330850A (en) | 2011-08-05 | 2011-08-05 | Bimetal centrifugal composite pipe and preparation method thereof |
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| CN201110223221A CN102330850A (en) | 2011-08-05 | 2011-08-05 | Bimetal centrifugal composite pipe and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295804A (en) * | 2014-08-28 | 2015-01-21 | 河北久通耐磨防腐管道有限公司 | Dual-liquid bimetal pipeline and production method thereof |
| US20150183015A1 (en) | 2009-08-17 | 2015-07-02 | Ati Properties, Inc. | Method of Producing Cold-Worked Centrifugal Cast Tubular Products |
| US9574684B1 (en) * | 2009-08-17 | 2017-02-21 | Ati Properties Llc | Method for producing cold-worked centrifugal cast composite tubular products |
| US9662740B2 (en) | 2004-08-02 | 2017-05-30 | Ati Properties Llc | Method for making corrosion resistant fluid conducting parts |
| US10118259B1 (en) | 2012-12-11 | 2018-11-06 | Ati Properties Llc | Corrosion resistant bimetallic tube manufactured by a two-step process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9662740B2 (en) | 2004-08-02 | 2017-05-30 | Ati Properties Llc | Method for making corrosion resistant fluid conducting parts |
| US20150183015A1 (en) | 2009-08-17 | 2015-07-02 | Ati Properties, Inc. | Method of Producing Cold-Worked Centrifugal Cast Tubular Products |
| US9375771B2 (en) | 2009-08-17 | 2016-06-28 | Ati Properties, Inc. | Method of producing cold-worked centrifugal cast tubular products |
| US9574684B1 (en) * | 2009-08-17 | 2017-02-21 | Ati Properties Llc | Method for producing cold-worked centrifugal cast composite tubular products |
| US10118259B1 (en) | 2012-12-11 | 2018-11-06 | Ati Properties Llc | Corrosion resistant bimetallic tube manufactured by a two-step process |
| CN104295804A (en) * | 2014-08-28 | 2015-01-21 | 河北久通耐磨防腐管道有限公司 | Dual-liquid bimetal pipeline and production method thereof |
| CN104295804B (en) * | 2014-08-28 | 2016-08-24 | 河北久通耐磨防腐管道有限公司 | Double-fluid double metal pipeline and preparation method thereof |
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Application publication date: 20120125 |