CN103667876A - Multi-metal composite wear-resistant elbow pipe and preparation method thereof - Google Patents
Multi-metal composite wear-resistant elbow pipe and preparation method thereof Download PDFInfo
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- CN103667876A CN103667876A CN201310587241.6A CN201310587241A CN103667876A CN 103667876 A CN103667876 A CN 103667876A CN 201310587241 A CN201310587241 A CN 201310587241A CN 103667876 A CN103667876 A CN 103667876A
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- 239000002905 metal composite material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 71
- 244000035744 Hura crepitans Species 0.000 claims abstract description 55
- 239000002245 particle Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 239000011248 coating agent Substances 0.000 claims abstract description 37
- 229920002165 CarbonCast Polymers 0.000 claims abstract description 22
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006260 foam Substances 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 230000001680 brushing effect Effects 0.000 claims description 54
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- 229910052804 chromium Inorganic materials 0.000 claims description 37
- 239000011651 chromium Substances 0.000 claims description 37
- 239000006071 cream Substances 0.000 claims description 37
- 239000003973 paint Substances 0.000 claims description 26
- 229910001018 Cast iron Inorganic materials 0.000 claims description 25
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 229910052748 manganese Inorganic materials 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
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- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
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- 238000010079 rubber tapping Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 229920006327 polystyrene foam Polymers 0.000 claims description 8
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000005253 cladding Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
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- 239000002985 plastic film Substances 0.000 claims description 6
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- 229920002223 polystyrene Polymers 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
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- 238000003860 storage Methods 0.000 claims description 6
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- 238000005496 tempering Methods 0.000 claims description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 5
- 239000010962 carbon steel Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 abstract description 123
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Abstract
The invention discloses a multi-metal composite wear-resistant elbow pipe and a preparation method thereof, wherein the inner side wall of the elbow pipe is formed through the composition of carbon cast steel on an outer layer and high-chromium iron on an inner layer, and is characterized in that the outer side wall of the elbow pipe is formed through the composition of three layers of different materials, namely a carbon cast steel outer layer (1), a high-chromium iron intermediate layer (2) and a wolfram carbide particle ceramic inner layer (3); the preparation method of the multi-metal composite wear-resistant elbow pipe comprises the following steps: foam model making, painting and baking, elbow pipe outer layer model packing, smelting, sand box vacuum pumping and pouring, taking out and cleaning castings on a carbon cast steel outer layer of the elbow pipe, elbow pipe interlayer model assembling, wolfram carbide particulate material paste painting, coating painting and baking, binning, smelting, sand vacuum pumping and pouring, taking elbow pipe castings out, cleaning and detecting, heat treating to the elbow pipe castings, detecting the hardness of the end surface of the multi-metal composite wear-resistant elbow pipe, and then warehousing; the prepared multi-metal composite wear-resistant elbow pipe has the advantages that the comprehensive mechanical property is excellent, the service life is long, the manufacturing technology is advanced, the maintenance and the installation are convenient, and a wide cost performance competition space is provided.
Description
Technical field:
The present invention relates to Metal smelting technical field, is a kind of many metal composite wear-resistant bend pipe and preparation method thereof specifically.
Background technology:
The metallic substance pipe of all size is widely used in the industries such as metallurgy, electric power, mine, coal, building materials and chemical industry, and wherein swan neck is important component part in delivery system.Because the medium such as coal dust, lime-ash in delivery system washes away strongly, erosive wear effect, be 1/4 ~ 1/5 of straight tube position the work-ing life that makes swan neck, cause not only changing a large amount of metallic substance of swan neck consumption, and perplex it always and normally produce time of taking of stopping production maintain and replace swan neck.In recent years, using more swan neck material is 16Mn, and through welding combination forming, but its hardness is low, resistance to abrasion extreme difference, and work-ing life is shorter.Also have at steel elbow inner-walls of duct and apply sticky certain thickness Al
2o
3the liner of the materials such as pottery, so as to improving its resistance to abrasion.But because its fragility is large, easily crack and local obscission, can not bear large impact, there being certain difficulty aspect transportation, installation and maintenance, affected use, practical application is fewer.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of many metal composite wear-resistant bend pipe is provided.
Another object of the present invention is to provide a kind of preparation method of many metal composite wear-resistant bend pipe.
The present invention mainly solves that existing 16Mn swan neck hardness is low, resistance to abrasion is poor, work-ing life is shorter and applies sticky Al at elbow inner-walls of duct
2o
3pottery waits the swan neck fragility of materials greatly, easily to crack and local obscission, can not bear the large problems such as impact.
Technical scheme of the present invention is: a kind of many metal composite wear-resistant bend pipe, its inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, its special character is, outer side wall is by three layers of differing materials compound composition, and carbon cast steel is outer, rich chromium cast iron middle layer and tungsten carbide particle ceramic inner layer.
Further, the outer field composition of described carbon cast steel is by weight percentage: C:0.20%～0.30%, Si:0.45%～0.50%, Mn:0.80%～0.85%, S≤0.04%, P≤0.04%, surplus are iron.
Further, the composition in described rich chromium cast iron middle layer is by weight percentage: C:2.60%～3.00%, Si:0.50%～0.80%, Mn:2.60%～3.00%, Cr:15.0%～17.0%, S≤0.06%, P≤0.10%, surplus are iron.
Further, the composition of described tungsten carbide particle ceramic inner layer is by weight percentage: wolfram varbide: 20%～40%, C:2.60%～3.00%, Si:0.50%～0.80%, Mn:2.60%～3.00%, Cr:10%～20%, S≤0.06%, P≤0.10%, surplus are iron.
The preparation method of a kind of many metal composite wear-resistant bend pipe of the present invention, its special character is, comprises following processing step:
1) bubbles model is made, and cutting polystyrene foam is made the outer layer model of swan neck and middle layer model;
2) brushing paint and baking, the outer layer model brushing paint of swan neck baking;
3) the outer mold setting of swan neck, the outer layer model of swan neck packs in vacuum sand box, and assembling gating system, fills the dry quartz sand of granularity 20 order, vibration sandbox 1 minute; Covered with plastic film, lays sprue cup;
4) melting, prepares burden according to the carbon steel cladding material of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment, 1620 ℃ ~ 1640 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould, and sandbox vacuumizes vacuum degree and is-0.03MPa ~-0.04MPa, is cooled to 1580 ℃ ~ 1600 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of the carbon steel of swan neck and cleaning, outlet after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs foam layer in the middle of swan neck in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream, at bubbles model corner, swan neck middle layer inwall, forms tungsten carbide particle material cream coating by the brushing of tungsten carbide particle material cream, cream coat-thickness 5mm ~ 7mm, and baking is dry; 60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking, the inwall of swan neck middle layer bubbles model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer and baking;
10) vanning, puts into vacuum sand box, assembling gating system, swan neck upper end open type ingate by the interior outer foundry goods of swan neck that the middle layer bubbles model that coats coating is housed;
11) melting, prepares burden according to the rich chromium cast iron intermediate layer material composition of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment; 1500 ℃ ~ 1520 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould, and sandbox vacuumizes vacuum degree and is-0.03Mpa ~-0.04Mpa, is cooled to 1450 ℃ ~ 1480 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check, outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer; Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Further, the polystyrene foam density 0.018g/cm described in step 1)
3~ 0.020g/cm
3.
Further, step 2) described brushing paint and baking, the preparation of a coating, is: quartz sand by weight percentage: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging; B brushing and baking, outside swan neck, after layer model brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours; Dope layer total thickness 2mm.
Further, the gating system of step 3), sprue sectional dimension is 50mm * 50mm, ingate is 40mm * 40mm.
Further, the tungsten carbide particle material cream described in step 8), is made by following material: wolfram varbide: granularity 20 order ~ 80 orders, 20%～40%; Ferrochrome powder: granularity 20 order ~ 80 orders, 10%～20%; Polyvinyl alcohol adhesive 5% ~ 8%; Remaining is granules of polystyrene, granularity 60 order ~ 80 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state.
Further, the gating system described in step 10), swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm.
Compared with the prior art a kind of many metal composite wear-resistant bend pipe of the present invention and preparation method thereof has outstanding substantive distinguishing features and marked improvement:
1, adopt carbon steel (hardness HB80 ~ 180)-rich chromium cast iron (hardness HRC58 ~ 61)-tungsten carbide grain reinforced metal base pottery (hardness HV2000 ~ 3000) to manufacture many metal composite wear-resistant bend pipe, the section hardness ecto-entad of its wall increases gradually, forms gradient wearing composite material cross section; Through using wearing and tearing, find, prolongation along with wearing-in period, tungsten carbide particle in matrix material protrudes from rich chromium cast iron matrix, metallic matrix has been played to microcosmic shade influence, overfill protection metallic matrix further wear and tear, wear resistance is the more than 2 times of matrix metal, swan neck work-ing life is quite or higher than delivery system straight tube position, avoid the replacing of swan neck, saved a large amount of metallic substance, effectively improve pipeline operation efficiency;
2, adopt evaporative pattern vacuum casting process, the casting of high temperature rich chromium cast iron liquid is oozed to the hole between tungsten carbide particle, after iron immersion profit particle, with particle surface, metallurgical (or chemistry) occurring reacts, after solidifying, on rich chromium cast iron surface, form the ceramic thin film that one deck has particular tissues and performance, its bonding strength is high, be difficult for cracking, obscission, than other, apply the technique composite beds such as sticky high-abrasive material firm, safe to use;
3, many metal composite wear-resistant bend pipe comprehensive mechanical property is excellent, long service life, and manufacturing technology is advanced, is convenient to maintenance and installation, has wide cost performance competitive space.
Accompanying drawing explanation:
Fig. 1 is cross-sectional view of the present invention;
Fig. 2 is lost foam casting process schematic diagram of the present invention;
Fig. 3 is outer steel casting iron of the present invention and gating system (after cast) schematic diagram thereof.
Drawing explanation:
1 carbon cast steel is outer, 2 rich chromium cast iron middle layers, 3 tungsten carbide particle ceramic inner layer, foam layer in the middle of 4 swan necks, 5 dope layers, 6 dry quartz sands, 7 sprues, 8 ingates, 9 gating systems (containing ingate, cross gate and sprue), 10 tungsten carbide particle material cream coatings.
Embodiment:
For Comprehension and Implementation better, below in conjunction with accompanying drawing, provide specific embodiment and describe the present invention in detail.
Embodiment 1: referring to Fig. 1,2,3, the material composition of carbon cast steel skin 1 is by weight percentage: C:0.20%, Si:0.45%, Mn:0.80%, S≤0.04%, P≤0.04%, Yu Weitie; Rich chromium cast iron middle layer 2 material compositions are by weight percentage: C:2.60%, Si:0.50%, Mn:2.60%, Cr:15%, S≤0.06%, P≤0.10%, Yu Weitie; Tungsten carbide particle ceramic inner layer 3 material compositions are by weight percentage: wolfram varbide: 20%, C:2.60%, Si:0.50%, Mn:2.60%, Cr:10%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize many metal composite of evaporative pattern vacuum casting wear-resistant bend pipe, swan neck inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, and outer side wall is by 3 three layers of carbon cast steel skin 1, rich chromium cast iron middle layer 2 and tungsten carbide particle ceramic inner layer differing materials compound composition.
Concrete preparation method is as follows:
1) bubbles model is made, and adopts resistance wire cutting polystyrene foam to make the outer layer model of swan neck and middle layer model, foam density 0.018g/cm
3;
2) brushing paint and baking, the outer layer model brushing paint of swan neck baking;
The preparation of a, coating, is: quartz sand by weight percentage: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and toast, after brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours; Dope layer total thickness 2mm;
3) the outer mold setting of swan neck, the outer layer model of swan neck packs in vacuum sand box, assembling gating system, sprue 7 sectional dimensions are 50mm * 50mm, ingate 8 is 40mm * 40mm, totally 2; Fill the dry quartz sand 6 of granularity 20 order, vibration sandbox 1 minute; Covered with plastic film, lays sprue cup;
4) melting, prepares burden according to described many metal composite wear-resistant bend tube wall cladding material, melting in intermediate frequency furnace, deoxidation treatment, 1620 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould, and sandbox vacuumizes vacuum degree and is-0.03Mpa, is cooled to 1580 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of swan neck and cleaning, outlet (Fig. 3) after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs foam layer 4 in the middle of swan neck in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream:
A, the preparation of tungsten carbide particle material cream:
Material forms: wolfram varbide: granularity 20 orders, 20%; Ferrochrome powder: granularity 20 orders, 10%; Polyvinyl alcohol adhesive 5%; Remaining is granules of polystyrene, granularity 60 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking, at bubbles model corner, swan neck middle layer inwall, form tungsten carbide particle material cream coating 10 by the brushing of tungsten carbide particle material cream, cream coat-thickness 5mm, and baking is dry; 60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking.The inwall of swan neck middle layer model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer 5 and baking;
10) vanning.The outer foundry goods of swan neck (the middle layer bubbles model that coats coating is inside housed) is put into vacuum sand box, assembling gating system 9(is containing ingate, cross gate and sprue), swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm;
11) melting.According to described many metal composite wear-resistant bend tube wall intermediate layer material composition, prepare burden, melting in intermediate frequency furnace, deoxidation treatment; 1500 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1450 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check.Outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer.Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 2: referring to Fig. 1,2,3, the material composition of carbon cast steel skin 1 is by weight percentage: C:0.24%, Si:0.47%, Mn:0.82%, S≤0.04%, P≤0.04%, Yu Weitie; Rich chromium cast iron middle layer 2 material compositions are by weight percentage: C:2.70%, Si:0.60%, Mn:2.70%, Cr:16.0%, S≤0.06%, P≤0.10%, Yu Weitie; Tungsten carbide particle ceramic inner layer 3 material compositions are by weight percentage: wolfram varbide: 25%, C:2.70%, Si:0.60%, Mn:2.70%, Cr:14%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize many metal composite of evaporative pattern vacuum casting wear-resistant bend pipe, swan neck inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, and outer side wall is by 3 three layers of carbon cast steel skin 1, rich chromium cast iron middle layer 2 and tungsten carbide particle ceramic inner layer differing materials compound composition.
Concrete preparation method is as follows:
1) bubbles model is made.Adopt resistance wire cutting polystyrene foam to make the outer layer model of swan neck and middle layer model, foam density 0.019g/cm
3;
2) brushing paint and baking.The outer layer model brushing paint of swan neck baking;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.After brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours, dope layer total thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck packs in vacuum sand box, assembling gating system, and sprue 7 sectional dimensions are 50mm * 50mm, ingate 8 is 40mm * 40mm, totally 2.Fill the dry quartz sand 6 of granularity 20 order, vibration sandbox 1 minute; Covered with plastic film, lays sprue cup;
4) melting.According to described many metal composite wear-resistant bend tube wall cladding material, prepare burden, melting in intermediate frequency furnace, deoxidation treatment, 1625 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1585 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of swan neck and cleaning.Outlet (Fig. 3) after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs foam layer 4 in the middle of swan neck in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream:
A, the preparation of tungsten carbide particle material cream:
Material forms: wolfram varbide: granularity 40 orders, 26%; Ferrochrome powder: granularity 40 orders, 14%; Polyvinyl alcohol adhesive 6%; Remaining is granules of polystyrene, granularity 65 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking.The brushing of tungsten carbide particle material cream, at bubbles model corner, swan neck middle layer inwall, is formed to tungsten carbide particle material cream coating 10, cream coat-thickness 5.5mm, baking is dry.60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking.The inwall of swan neck middle layer model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer 5 and baking;
10) vanning.The outer foundry goods of swan neck (the middle layer bubbles model that coats coating is inside housed) is put into vacuum sand box, assembling gating system 9, swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm;
11) melting.According to described many metal composite wear-resistant bend tube wall intermediate layer material composition, prepare burden, melting in intermediate frequency furnace, deoxidation treatment.1505 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1460 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check, outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer; Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 3: referring to Fig. 1,2,3, the material composition of carbon cast steel skin 1 is by weight percentage: C:0.28%, Si:0.49%, Mn:0.84%, S≤0.04%, P≤0.04%, Yu Weitie; Rich chromium cast iron middle layer 2 material compositions are by weight percentage: C:2.90%, Si:0.70%, Mn:2.90%, Cr:16.5%, S≤0.06%, P≤0.10%, Yu Weitie; Tungsten carbide particle ceramic inner layer 3 material compositions are by weight percentage: wolfram varbide: 30%, C:2.90%, Si:0.70%, Mn:2.90%, Cr:18%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize many metal composite of evaporative pattern vacuum casting wear-resistant bend pipe, swan neck inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, and outer side wall is by 3 three layers of carbon cast steel skin 1, rich chromium cast iron middle layer 2 and tungsten carbide particle ceramic inner layer differing materials compound composition.
Concrete preparation method is as follows:
1) bubbles model is made.Adopt resistance wire cutting polystyrene foam to make the outer layer model of swan neck and middle layer model, foam density 0.0195g/cm
3;
2) brushing paint and baking.The outer layer model brushing paint of swan neck baking;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.After brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours; Dope layer total thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck packs in vacuum sand box, assembling gating system, and sprue 7 sectional dimensions are 50mm * 50mm, ingate 8 is 40mm * 40mm, totally 2; Fill the dry quartz sand 6 of granularity 20 order, vibration sandbox 1 minute, covered with plastic film, lays sprue cup;
4) melting.According to described many metal composite wear-resistant bend tube wall cladding material, prepare burden, melting in intermediate frequency furnace, deoxidation treatment, 1630 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1590 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of swan neck and cleaning.Outlet (Fig. 3) after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs foam layer 4 in the middle of swan neck in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream:
A, the preparation of tungsten carbide particle material cream:
Material forms: wolfram varbide: granularity 60 orders, 30%; Ferrochrome powder: granularity 60 orders, 18%; Polyvinyl alcohol adhesive 7%; Remaining is granules of polystyrene, granularity 70 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking.The brushing of tungsten carbide particle material cream, at bubbles model corner, swan neck middle layer inwall, is formed to tungsten carbide particle material cream coating 10, cream coat-thickness 6mm, baking is dry; 60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking.The inwall of swan neck middle layer model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer 5 and baking;
10) vanning.The outer foundry goods of swan neck (the middle layer bubbles model that coats coating is inside housed) is put into vacuum sand box, assembling gating system 9, swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm;
11) melting.According to described many metal composite wear-resistant bend tube wall intermediate layer material composition, prepare burden, melting in intermediate frequency furnace, deoxidation treatment; 1510 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1470 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check, outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer.Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 4: referring to Fig. 1,2,3, the material composition of carbon cast steel skin 1 is by weight percentage: C:0.30%, Si:0.50%, Mn:0.85%, S≤0.04%, P≤0.04%, Yu Weitie; Rich chromium cast iron middle layer 2 material compositions are by weight percentage: C:3.00%, Si:0.80%, Mn:3.00%, Cr:17.0%, S≤0.06%, P≤0.10%, Yu Weitie; Tungsten carbide particle ceramic inner layer 3 material compositions are by weight percentage: wolfram varbide: 40%, C:3.00%, Si:0.80%, Mn:3.00%, Cr:20%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize many metal composite of evaporative pattern vacuum casting wear-resistant bend pipe, swan neck inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, and outer side wall is by 3 three layers of carbon cast steel skin 1, rich chromium cast iron middle layer 2 and tungsten carbide particle ceramic inner layer differing materials compound composition.
Concrete preparation method is as follows:
1) bubbles model is made.Adopt resistance wire cutting polystyrene foam to make the outer layer model of swan neck and middle layer model, foam density 0.020g/cm
3;
2) brushing paint and baking, the outer layer model brushing paint of swan neck baking;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.After brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours.Dope layer total thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck packs in vacuum sand box, assembling gating system, and sprue 7 sectional dimensions are 50mm * 50mm, ingate 8 is 40mm * 40mm, totally 2; Fill the dry quartz sand 6 of granularity 20 order, vibration sandbox 1 minute; Covered with plastic film, lays sprue cup;
4) melting.According to described many metal composite wear-resistant bend tube wall cladding material, prepare burden, melting in intermediate frequency furnace, deoxidation treatment, 1640 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1600 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of swan neck and cleaning.Outlet (Fig. 3) after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs swan neck middle layer foam 4 in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream:
A, the preparation of tungsten carbide particle material cream:
Material forms: wolfram varbide: granularity 80 orders, 40%; Ferrochrome powder: 80 orders, 20%; Polyvinyl alcohol adhesive 8%; Remaining is granules of polystyrene, granularity 80 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking, at bubbles model corner, swan neck middle layer inwall, form tungsten carbide particle material cream coating 10 by the brushing of tungsten carbide particle material cream, cream coat-thickness 7mm, and baking is dry; 60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking.The inwall of swan neck middle layer model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer 5 and baking;
10) vanning.The outer foundry goods of swan neck (the middle layer bubbles model that coats coating is inside housed) is put into vacuum sand box, assembling gating system 9, swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm;
11) melting.According to described many metal composite wear-resistant bend tube wall intermediate layer material composition, prepare burden, melting in intermediate frequency furnace, deoxidation treatment; 1520 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould.Sandbox vacuumizes vacuum degree, is cooled to 1480 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check.Outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer; Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
These are only preferred embodiment of the present invention, be not used for limiting practical range of the present invention; If do not depart from the spirit and scope of the present invention, the present invention is modified or is equal to replacement, all should be encompassed in the middle of the protection domain of the claims in the present invention.
Claims (10)
1. the pipe of metal composite wear-resistant bend more than a kind, its inner side-wall is by compound composition of high chromium cast iron layer of outer field carbon cast steel and internal layer, it is characterized in that, outer side wall is by three layers of differing materials compound composition, carbon cast steel outer (1), rich chromium cast iron middle layer (2) and tungsten carbide particle ceramic inner layer (3).
2. a kind of many metal composite wear-resistant bend pipe according to claim 1, it is characterized in that, the composition of described carbon cast steel outer (1) is by weight percentage: C:0.20%～0.30%, Si:0.45%～0.50%, Mn:0.80%～0.85%, S≤0.04%, P≤0.04%, surplus are iron.
3. a kind of many metal composite wear-resistant bend pipe according to claim 1, it is characterized in that, the composition in described rich chromium cast iron middle layer (2) is by weight percentage: C:2.60%～3.00%, Si:0.50%～0.80%, Mn:2.60%～3.00%, Cr:15.0%～17.0%, S≤0.06%, P≤0.10%, surplus are iron.
4. a kind of many metal composite wear-resistant bend pipe according to claim 1, it is characterized in that, the composition of described tungsten carbide particle ceramic inner layer (3) is by weight percentage: wolfram varbide: 20%～40%, C:2.60%～3.00%, Si:0.50%～0.80%, Mn:2.60%～3.00%, Cr:10%～20%, S≤0.06%, P≤0.10%, surplus are iron.
5. the preparation method of the arbitrary many metal composite wear-resistant bend pipe described in the claims 1-4, is characterized in that, comprises following processing step:
1) bubbles model is made, and cutting polystyrene foam is made the outer layer model of swan neck and middle layer model;
2) brushing paint and baking, the outer layer model brushing paint of swan neck baking;
3) the outer mold setting of swan neck, the outer layer model of swan neck packs in vacuum sand box, and assembling gating system, fills the granularity dry quartz sand of 20 order (6), vibration sandbox 1 minute; Covered with plastic film, lays sprue cup;
4) melting, prepares burden according to the carbon steel cladding material of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment, 1620 ℃ ~ 1640 ℃ of molten steel tapping temperatures;
5) sandbox vacuumizes and pours into a mould, and sandbox vacuumizes vacuum degree and is-0.03MPa ~-0.04MPa, is cooled to 1580 ℃ ~ 1600 ℃ to pour into a mould after molten steel is come out of the stove in ladle, keeps vacuum degree after 10 minutes, pressure release;
6) the outer foundry goods outlet of the carbon steel of swan neck and cleaning, outlet after foundry goods is incubated 2 hours in sandbox, is cooled to room temperature, removes gating system, removes dope layer;
7) assembling swan neck middle layer model, packs foam layer (4) in the middle of swan neck in the outer foundry goods of clean swan neck into;
8) brushing tungsten carbide particle material cream, at bubbles model corner, swan neck middle layer inwall, forms tungsten carbide particle material cream coating (10) by the brushing of tungsten carbide particle material cream, cream coat-thickness 5mm ~ 7mm, and baking is dry; 60 ℃ of storing temperatures, baking time 8 hours;
9) brushing paint and baking, the inwall of swan neck middle layer bubbles model (being coated with tungsten carbide particle material cream layer) carries out brushing paint layer (5) and baking;
10) vanning, puts into vacuum sand box, assembling gating system (9), swan neck upper end open type ingate by the interior outer foundry goods of swan neck that the middle layer bubbles model that coats coating is housed;
11) melting, prepares burden according to the rich chromium cast iron intermediate layer material composition of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment; 1500 ℃ ~ 1520 ℃ of iron liquid tapping temperatures;
12) sandbox vacuumizes and pours into a mould, and sandbox vacuumizes vacuum degree and is-0.03Mpa ~-0.04Mpa, is cooled to 1450 ℃ ~ 1480 ℃ and pours into a mould after iron liquid is come out of the stove in bag, keeps negative pressure after 20 minutes, pressure release;
13) swan neck foundry goods outlet, cleaning and check, outlet after foundry goods is incubated 8 hours in sandbox is cooled to room temperature in air, removes gating system, removes dope layer; Many metal composite of initial survey wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technology: 960 ℃ ± 10 ℃ * 1.5h air cooling; Tempering process: 260 ℃ ± 10 ℃ * 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
6. the preparation method of the wear-resistant bend of metal composite more than pipe according to claim 5, is characterized in that, the polystyrene foam density 0.018g/cm described in step 1)
3~ 0.020g/cm
3.
7. the preparation method of the wear-resistant bend of metal composite more than pipe according to claim 5, is characterized in that step 2) described brushing paint and baking, the preparation of a coating, is: quartz sand by weight percentage: granularity 200 orders, 70%; Solka-floc: 3%; White glue with vinyl: 5%; Tap water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging; B brushing and baking, outside swan neck, after layer model brushing first pass coating, should toast dry, 58 ℃ of storing temperatures, soaking time is brushed coating again second time after 4 hours; Dope layer total thickness 2mm.
8. the preparation method of the wear-resistant bend of metal composite more than pipe according to claim 5, is characterized in that, the gating system of step 3), and sprue (7) sectional dimension is 50mm * 50mm, ingate (8) is 40mm * 40mm.
9. the preparation method of the wear-resistant bend of metal composite more than pipe according to claim 5, is characterized in that, the tungsten carbide particle material cream described in step 8), is made by following material: wolfram varbide: granularity 20 order ~ 80 orders, 20%～40%; Ferrochrome powder: granularity 20 order ~ 80 orders, 10%～20%; Polyvinyl alcohol adhesive 5% ~ 8%; Remaining is granules of polystyrene, granularity 60 order ~ 80 orders; First by above-mentioned granular material mixing evenly after, add polyvinyl alcohol adhesive, stir as paste state.
10. the preparation method of the wear-resistant bend of metal composite more than pipe according to claim 5, it is characterized in that, gating system described in step 10) (9), swan neck upper end open type ingate, its sectional dimension: long 40mm * wide 20mm * 3, cross gate is of a size of 40mm * 40mm, and sprue is of a size of 50mm * 50mm.
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| CN104085147A (en) * | 2014-06-17 | 2014-10-08 | 张家港市橡燊达机械有限公司 | High-toughness abrasion-resistant composite metal material |
| CN104674108A (en) * | 2015-02-06 | 2015-06-03 | 中国兵器工业第五二研究所烟台分所 | Tungsten carbide ceramic particle/high-chromium cast iron composite wear-resistant lining plate and manufacturing method thereof |
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| CN107270006B (en) * | 2017-07-18 | 2023-02-24 | 福州大学 | A wear-resistant elbow and its preparation method |
| CN107617730B (en) * | 2017-08-31 | 2019-08-20 | 西安工程大学 | A kind of wear-resistant and corrosion-resistant composite steel pipe and preparation method thereof |
| CN107617730A (en) * | 2017-08-31 | 2018-01-23 | 西安工程大学 | A kind of wear-and corrosion-resistant composite steel tube and preparation method thereof |
| CN108160707A (en) * | 2018-01-17 | 2018-06-15 | 浙江汇新新能源科技有限公司 | A kind of carbon steel composite with and preparation method thereof |
| CN108644514A (en) * | 2018-06-28 | 2018-10-12 | 三汽车制造有限公司 | A kind of concrete conveying elbow pipe and its manufacturing method |
| CN108856642A (en) * | 2018-07-26 | 2018-11-23 | 中国兵器工业第五二研究所烟台分所有限责任公司 | A kind of preparation method of resistance to ablative composite material fan housing |
| CN109055847A (en) * | 2018-10-25 | 2018-12-21 | 湖南山力泰机电科技有限公司 | A kind of tungsten alloy material based on tungsten carbide application |
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