CN103667876B - A kind of many metal composite wear-resistant bend pipe and preparation method thereof - Google Patents
A kind of many metal composite wear-resistant bend pipe and preparation method thereof Download PDFInfo
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- CN103667876B CN103667876B CN201310587241.6A CN201310587241A CN103667876B CN 103667876 B CN103667876 B CN 103667876B CN 201310587241 A CN201310587241 A CN 201310587241A CN 103667876 B CN103667876 B CN 103667876B
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Abstract
The invention discloses a kind of many metal composite wear-resistant bend pipe and preparation method thereof, swan neck madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, be characterized in, lateral wall is made up of three layers of different materials compound, carbon cast steel skin (1), rich chromium cast iron intermediate layer (2) and tungsten carbide particle ceramic inner layer (3), its preparation method comprises: bubbles model makes, brushing paint and baking, the outer mold setting of swan neck, melting, sandbox vacuumizes and cast, the outer foundry goods outlet of carbon cast steel of swan neck and cleaning, assembling swan neck intermediate layer model, brushing tungsten carbide particle material cream, brushing paint and baking, vanning, melting, sandbox vacuumizes and cast, swan neck foundry goods outlet, cleaning and inspection, put in storage after swan neck heat treating castings and detection many metal composite wear-resistant bend end surfaces hardness, the many metal composite wear-resistant bend pipe comprehensive mechanical property made is excellent, long service life, and manufacturing technology is advanced, is convenient to maintenance and installation, has wide cost performance competitive space.
Description
Technical field:
The present invention relates to metal smelt technical field, specifically a kind of many metal composite wear-resistant bend pipe and preparation method thereof.
Background technology:
The metallic material 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 induction system.Due to the medium such as coal dust, lime-ash in induction system strongly wash away, erosive wear effect, make be 1/4 ~ 1/5 of straight tube position the service life of swan neck, cause not only changing a large amount of metal material of swan neck consumption, and time of taking of stopping production maintain and replace swan neck is perplexed it always and normally produces.In recent years, use more swan neck material to be 16Mn, through welding combination forming, but its hardness is low, and wear resistence extreme difference, service life is shorter.Also have and apply sticky certain thickness Al at steel elbow inner-walls of duct
2o
3the liner of the materials such as pottery, so as to improving its wear resistence.But because its fragility is large, easily crack and local obscission, can not bear large impact, in transport, install and there is certain difficulty in maintenance, have impact on use, practical application is fewer.
Summary of the invention:
The object of the invention is the deficiency overcoming 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, wear resistence is poor, service 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 problems such as large impact.
Technical scheme of the present invention is: a kind of many metal composite wear-resistant bend pipe, its madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, its special character is, lateral wall is made up of three layers of different materials compound, carbon cast steel skin, rich chromium cast iron intermediate 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 intermediate 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: tungsten carbide: 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 makes, and cutting polystyrene foam makes the outer layer model of swan neck and intermediate layer model;
2) brushing paint and baking, the outer layer model brushing paint of swan neck also toasts;
3) the outer mold setting of swan neck, the outer layer model of swan neck loads in vacuum sand box, assembling running gate system, fills granularity 20 order drystone sand, vibration sandbox 1 minute; Covered with plastic film, lays cup;
4) melting, prepares burden according to the carbon steel cladding material of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment, molten steel tapping temperature 1620 DEG C ~ 1640 DEG C;
5) sandbox vacuumizes and cast, and it is-0.03MPa ~-0.04MPa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1580 DEG C ~ 1600 DEG C 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, foundry goods, at sandbox inside holding outlet after 2 hours, is cooled to room temperature, removes running gate system, remove dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate foam layers is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream, by the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating, cream coating layer thickness 5mm ~ 7mm, baking is dry; Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking, the inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer bubbles model carries out brushing paint layer and baking;
10) case, the outer foundry goods of swan neck built with the intermediate layer bubbles model coating coating is put into vacuum sand box, assembling running gate system, swan neck upper end open type ingate;
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; Iron liquid tapping temperature 1500 DEG C ~ 1520 DEG C;
12) sandbox vacuumizes and cast, and it is-0.03Mpa ~-0.04Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1450 DEG C ~ 1480 DEG C 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 at sandbox inside holding outlet after 8 hours, are cooled to room temperature with inspection, foundry goods in atmosphere, remove running gate system, removing dope layer; Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 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 in brushing paint and baking, the preparation of a coating, is: quartz sand by weight percentage: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging; B brushing and baking, should toast drying, baking temperature 58 DEG C after the outer layer model brushing first pass coating of swan neck, temperature retention time brushes second time coating again after 4 hours; Dope layer gross thickness 2mm.
Further, the running gate system of step 3), sprue sectional dimension is 50mm × 50mm, and ingate is 40mm × 40mm.
Further, the tungsten carbide particle material cream described in step 8), is made up of following material: tungsten carbide: granularity 20 order ~ 80 order, 20% ~ 40%; Ferrochrome powder: granularity 20 order ~ 80 order, 10% ~ 20%; Polyvinyl alcohol adhesive 5% ~ 8%; Remaining is granules of polystyrene, granularity 60 order ~ 80 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state.
Further, the running gate 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, carbon steel (hardness HB80 ~ 180)-rich chromium cast iron (hardness HRC58 ~ 61)-tungsten carbide grain reinforced metal base pottery (hardness HV2000 ~ 3000) is adopted 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; Find through using wearing and tearing, along with the prolongation of wearing-in period, tungsten carbide particle in composite protrudes from rich chromium cast iron matrix, serve microcosmic shadow effect to metallic matrix, support protects metallic matrix and weares and teares further, and wearability is more than 2 times of parent metal, swan neck service life is quite or higher than induction system straight tube position, avoid the replacing of swan neck, saved a large amount of metal material, effectively improved pipeline operation efficiency;
2, evaporative pattern vacuum casting process is adopted, high temperature rich chromium cast iron liquid is cast the hole oozed between tungsten carbide particle, there is metallurgical (or chemistry) after iron immersion profit particle to react with particle surface, form on rich chromium cast iron surface the ceramic thin film that one deck has particular tissues and performance after solidifying, its bond strength is high, not easily crack, obscission, apply the process combining layers such as sticky high-abrasive material than other 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 illustrates:
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 running gate system (after cast) schematic diagram thereof.
Drawing illustrates:
1 carbon cast steel is outer, 2 rich chromium cast iron intermediate layers, 3 tungsten carbide particle ceramic inner layer, 4 swan neck intermediate foam layers, 5 dope layers, 6 drystone sands, 7 sprues, 8 ingates, 9 running gate systems (containing ingate, cross gate and sprue), 10 tungsten carbide particle material cream coatings.
Detailed description of the invention:
In order to Comprehension and Implementation better, provide specific embodiment below in conjunction with accompanying drawing and describe the present invention in detail.
Embodiment 1: see 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 intermediate layer 2 material composition is 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 composition is by weight percentage: tungsten carbide: 20%, C:2.60%, Si:0.50%, Mn:2.60%, Cr:10%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize evaporative pattern vacuum pressing and casting many metal composite wear-resistant bend pipe, swan neck madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, and lateral wall is made up of carbon cast steel skin 1, rich chromium cast iron intermediate layer 2 and tungsten carbide particle ceramic inner layer 3 three layers of different materials compound.
Concrete preparation method is as follows:
1) bubbles model makes, and adopts resistance wire cutting polystyrene foam to make the outer layer model of swan neck and intermediate layer model, foam density 0.018g/cm
3;
2) brushing paint and baking, the outer layer model brushing paint of swan neck also toasts;
The preparation of a, coating, is: quartz sand by weight percentage: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking, should toast drying after brushing first pass coating, baking temperature 58 DEG C, temperature retention time brushes second time coating again after 4 hours; Dope layer gross thickness 2mm;
3) the outer mold setting of swan neck, the outer layer model of swan neck loads in vacuum sand box, assembling running gate system, and sprue 7 sectional dimension is 50mm × 50mm, and ingate 8 is 40mm × 40mm, totally 2; Fill granularity 20 order drystone sand 6, vibration sandbox 1 minute; Covered with plastic film, lays 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, molten steel tapping temperature 1620 DEG C;
5) sandbox vacuumizes and cast, and it is-0.03Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1580 DEG C 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, foundry goods, at sandbox inside holding outlet (Fig. 3) after 2 hours, is cooled to room temperature, removes running gate system, remove dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate foam layers 4 is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream:
A, tungsten carbide particle material cream are prepared:
Material forms: tungsten carbide: granularity 20 order, 20%; Ferrochrome powder: granularity 20 order, 10%; Polyvinyl alcohol adhesive 5%; Remaining is granules of polystyrene, granularity 60 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking, by the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating 10, cream coating layer thickness 5mm, baking is dry; Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking.The inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer model carries out brushing paint layer 5 and baking;
10) case.Outer for swan neck foundry goods (the intermediate layer bubbles model built with coating coating) is put into vacuum sand box, assembling running gate 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.Prepare burden according to described many metal composite wear-resistant bend tube wall intermediate layer material composition, melting in intermediate frequency furnace, deoxidation treatment; Iron liquid tapping temperature 1500 DEG C;
12) sandbox vacuumizes and cast.It is-0.03Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1450 DEG C 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 inspection.Foundry goods, at sandbox inside holding outlet after 8 hours, is cooled to room temperature in atmosphere, removes running gate system, removes dope layer.Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 2: see 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 intermediate layer 2 material composition is 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 composition is by weight percentage: tungsten carbide: 25%, C:2.70%, Si:0.60%, Mn:2.70%, Cr:14%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize evaporative pattern vacuum pressing and casting many metal composite wear-resistant bend pipe, swan neck madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, and lateral wall is made up of carbon cast steel skin 1, rich chromium cast iron intermediate layer 2 and tungsten carbide particle ceramic inner layer 3 three layers of different materials compound.
Concrete preparation method is as follows:
1) bubbles model makes.Resistance wire cutting polystyrene foam is adopted to make the outer layer model of swan neck and intermediate layer model, foam density 0.019g/cm
3;
2) brushing paint and baking.The outer layer model brushing paint of swan neck also toasts;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.Should toast drying after brushing first pass coating, baking temperature 58 DEG C, temperature retention time brushes second time coating again after 4 hours, dope layer gross thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck loads in vacuum sand box, and assembling running gate system, sprue 7 sectional dimension is 50mm × 50mm, and ingate 8 is 40mm × 40mm, totally 2.Fill granularity 20 order drystone sand 6, vibration sandbox 1 minute; Covered with plastic film, lays cup;
4) melting.Prepare burden according to described many metal composite wear-resistant bend tube wall cladding material, melting in intermediate frequency furnace, deoxidation treatment, molten steel tapping temperature 1625 DEG C;
5) sandbox vacuumizes and cast.It is-0.032Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1585 DEG C 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.Foundry goods, at sandbox inside holding outlet (Fig. 3) after 2 hours, is cooled to room temperature, removes running gate system, removes dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate foam layers 4 is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream:
A, tungsten carbide particle material cream are prepared:
Material forms: tungsten carbide: granularity 40 order, 26%; Ferrochrome powder: granularity 40 order, 14%; Polyvinyl alcohol adhesive 6%; Remaining is granules of polystyrene, granularity 65 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking.By the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating 10, cream coating layer thickness 5.5mm, baking is dry.Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking.The inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer model carries out brushing paint layer 5 and baking;
10) case.Outer for swan neck foundry goods (the intermediate layer bubbles model built with coating coating) is put into vacuum sand box, assembling running gate 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.Prepare burden according to described many metal composite wear-resistant bend tube wall intermediate layer material composition, melting in intermediate frequency furnace, deoxidation treatment.Iron liquid tapping temperature 1505 DEG C;
12) sandbox vacuumizes and cast.It is-0.032Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1460 DEG C 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 at sandbox inside holding outlet after 8 hours, are cooled to room temperature with inspection, foundry goods in atmosphere, remove running gate system, removing dope layer; Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 3: see 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 intermediate layer 2 material composition is 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 composition is by weight percentage: tungsten carbide: 30%, C:2.90%, Si:0.70%, Mn:2.90%, Cr:18%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize evaporative pattern vacuum pressing and casting many metal composite wear-resistant bend pipe, swan neck madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, and lateral wall is made up of carbon cast steel skin 1, rich chromium cast iron intermediate layer 2 and tungsten carbide particle ceramic inner layer 3 three layers of different materials compound.
Concrete preparation method is as follows:
1) bubbles model makes.Resistance wire cutting polystyrene foam is adopted to make the outer layer model of swan neck and intermediate layer model, foam density 0.0195g/cm
3;
2) brushing paint and baking.The outer layer model brushing paint of swan neck also toasts;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.Should toast drying after brushing first pass coating, baking temperature 58 DEG C, temperature retention time brushes second time coating again after 4 hours; Dope layer gross thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck loads in vacuum sand box, assembling running gate system, and sprue 7 sectional dimension is 50mm × 50mm, and ingate 8 is 40mm × 40mm, totally 2; Fill granularity 20 order drystone sand 6, vibration sandbox 1 minute, covered with plastic film, lays cup;
4) melting.Prepare burden according to described many metal composite wear-resistant bend tube wall cladding material, melting in intermediate frequency furnace, deoxidation treatment, molten steel tapping temperature 1630 DEG C;
5) sandbox vacuumizes and cast.It is-0.036Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1590 DEG C 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.Foundry goods, at sandbox inside holding outlet (Fig. 3) after 2 hours, is cooled to room temperature, removes running gate system, removes dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate foam layers 4 is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream:
A, tungsten carbide particle material cream are prepared:
Material forms: tungsten carbide: granularity 60 order, 30%; Ferrochrome powder: granularity 60 order, 18%; Polyvinyl alcohol adhesive 7%; Remaining is granules of polystyrene, granularity 70 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking.By the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating 10, cream coating layer thickness 6mm, baking is dry; Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking.The inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer model carries out brushing paint layer 5 and baking;
10) case.Outer for swan neck foundry goods (the intermediate layer bubbles model built with coating coating) is put into vacuum sand box, assembling running gate 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.Prepare burden according to described many metal composite wear-resistant bend tube wall intermediate layer material composition, melting in intermediate frequency furnace, deoxidation treatment; Iron liquid tapping temperature 1510 DEG C;
12) sandbox vacuumizes and cast.It is-0.036Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1470 DEG C 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 at sandbox inside holding outlet after 8 hours, are cooled to room temperature with inspection, foundry goods in atmosphere, remove running gate system, removing dope layer.Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
Embodiment 4: see 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 intermediate layer 2 material composition is 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 composition is by weight percentage: tungsten carbide: 40%, C:3.00%, Si:0.80%, Mn:3.00%, Cr:20%, S≤0.06%, P≤0.10%, Yu Weitie; Utilize evaporative pattern vacuum pressing and casting many metal composite wear-resistant bend pipe, swan neck madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, and lateral wall is made up of carbon cast steel skin 1, rich chromium cast iron intermediate layer 2 and tungsten carbide particle ceramic inner layer 3 three layers of different materials compound.
Concrete preparation method is as follows:
1) bubbles model makes.Resistance wire cutting polystyrene foam is adopted to make the outer layer model of swan neck and intermediate layer model, foam density 0.020g/cm
3;
2) brushing paint and baking, the outer layer model brushing paint of swan neck also toasts;
The preparation of a, coating.Be by weight percentage: quartz sand: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging;
B, brushing and baking.Should toast drying after brushing first pass coating, baking temperature 58 DEG C, temperature retention time brushes second time coating again after 4 hours.Dope layer gross thickness 2mm;
3) the outer mold setting of swan neck.The outer layer model of swan neck loads in vacuum sand box, assembling running gate system, and sprue 7 sectional dimension is 50mm × 50mm, and ingate 8 is 40mm × 40mm, totally 2; Fill granularity 20 order drystone sand 6, vibration sandbox 1 minute; Covered with plastic film, lays cup;
4) melting.Prepare burden according to described many metal composite wear-resistant bend tube wall cladding material, melting in intermediate frequency furnace, deoxidation treatment, molten steel tapping temperature 1640 DEG C;
5) sandbox vacuumizes and cast.It is-0.04Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1600 DEG C 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.Foundry goods, at sandbox inside holding outlet (Fig. 3) after 2 hours, is cooled to room temperature, removes running gate system, removes dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate layer foam 4 is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream:
A, tungsten carbide particle material cream are prepared:
Material forms: tungsten carbide: granularity 80 order, 40%; Ferrochrome powder: 80 orders, 20%; Polyvinyl alcohol adhesive 8%; Remaining is granules of polystyrene, granularity 80 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state;
B, brushing and baking, by the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating 10, cream coating layer thickness 7mm, baking is dry; Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking.The inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer model carries out brushing paint layer 5 and baking;
10) case.Outer for swan neck foundry goods (the intermediate layer bubbles model built with coating coating) is put into vacuum sand box, assembling running gate 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.Prepare burden according to described many metal composite wear-resistant bend tube wall intermediate layer material composition, melting in intermediate frequency furnace, deoxidation treatment; Iron liquid tapping temperature 1520 DEG C;
12) sandbox vacuumizes and cast.It is-0.04Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1480 DEG C 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 inspection.Foundry goods, at sandbox inside holding outlet after 8 hours, is cooled to room temperature in atmosphere, removes running gate system, removes dope layer; Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings.Quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 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 equivalent to replace, in the middle of the protection domain that all should be encompassed in the claims in the present invention.
Claims (10)
1. the pipe of metal composite wear-resistant bend more than a kind, its madial wall is made up of the high chromium cast iron layer compound of outer field carbon cast steel and internal layer, it is characterized in that, lateral wall is made up of three layers of different materials compound, carbon cast steel skin (1), rich chromium cast iron intermediate layer (2) and tungsten carbide particle ceramic inner layer (3).
2. one many metal composite wear-resistant bend pipe according to claim 1, it is characterized in that, the composition of described carbon cast steel skin (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. one many metal composite wear-resistant bend pipe according to claim 1, it is characterized in that, the composition in described rich chromium cast iron intermediate 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. one 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: tungsten carbide: 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, comprise following processing step:
1) bubbles model makes, and cutting polystyrene foam makes the outer layer model of swan neck and intermediate layer model;
2) brushing paint and baking, the outer layer model brushing paint of swan neck also toasts;
3) the outer mold setting of swan neck, the outer layer model of swan neck loads in vacuum sand box, and assembling running gate system, fills granularity 20 order drystone sand (6), vibration sandbox 1 minute; Covered with plastic film, lays cup;
4) melting, prepares burden according to the carbon steel cladding material of elbow tube wall, melting in intermediate frequency furnace, deoxidation treatment, molten steel tapping temperature 1620 DEG C ~ 1640 DEG C;
5) sandbox vacuumizes and cast, and it is-0.03MPa ~-0.04MPa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1580 DEG C ~ 1600 DEG C 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, foundry goods, at sandbox inside holding outlet after 2 hours, is cooled to room temperature, removes running gate system, remove dope layer;
7) assemble swan neck intermediate layer model, swan neck intermediate foam layers (4) is loaded in the outer foundry goods of clean swan neck;
8) brushing tungsten carbide particle material cream, by the brushing of tungsten carbide particle material cream at bubbles model corner, swan neck intermediate layer inwall, form tungsten carbide particle material cream coating (10), cream coating layer thickness 5mm ~ 7mm, baking is dry; Baking temperature 60 DEG C, baking time 8 hours;
9) brushing paint and baking, the inwall (being coated with tungsten carbide particle material paste layers) of swan neck intermediate layer bubbles model carries out brushing paint layer (5) and baking;
10) case, the outer foundry goods of swan neck built with the intermediate layer bubbles model coating coating is put into vacuum sand box, assembling running gate system (9), swan neck upper end open type ingate;
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; Iron liquid tapping temperature 1500 DEG C ~ 1520 DEG C;
12) sandbox vacuumizes and cast, and it is-0.03Mpa ~-0.04Mpa that sandbox vacuumizes vacuum degree, pours into a mould when being cooled to 1450 DEG C ~ 1480 DEG C 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 at sandbox inside holding outlet after 8 hours, are cooled to room temperature with inspection, foundry goods in atmosphere, remove running gate system, removing dope layer; Initial survey many metal composite wear-resistant bend pipe foundry goods surfaces externally and internally quality;
14) swan neck heat treating castings, quenching technical: 960 DEG C ± 10 DEG C × 1.5h air cooling; Tempering process: 260 DEG C ± 10 DEG C × 3h air cooling;
15) put in storage after detecting many metal composite wear-resistant bend end surfaces hardness.
6. the preparation method of many metal composite wear-resistant bend 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 many metal composite wear-resistant bend pipe according to claim 5, is characterized in that, step 2) described in brushing paint and baking, the preparation of a coating, is: quartz sand by weight percentage: granularity 200 order, 70%; Powdered cellulose: 3%; White glue with vinyl: 5%; Running water: 22%; Aforementioned proportion coating stirs 2 hours in ball mill, discharging; B brushing and baking, should toast drying, baking temperature 58 DEG C after the outer layer model brushing first pass coating of swan neck, temperature retention time brushes second time coating again after 4 hours; Dope layer gross thickness 2mm.
8. the preparation method of many metal composite wear-resistant bend pipe according to claim 5, is characterized in that, the running gate system of step 3), and sprue (7) sectional dimension is 50mm × 50mm, and ingate (8) is 40mm × 40mm.
9. the preparation method of many metal composite wear-resistant bend pipe according to claim 5, is characterized in that, the tungsten carbide particle material cream described in step 8), is made up: tungsten carbide of following material: granularity 20 order ~ 80 order, 20% ~ 40%; Ferrochrome powder: granularity 20 order ~ 80 order, 10% ~ 20%; Polyvinyl alcohol adhesive 5% ~ 8%; Remaining is granules of polystyrene, granularity 60 order ~ 80 order; After first being mixed by above-mentioned granular material, add polyvinyl alcohol adhesive, stir as paste state.
10. the preparation method of many metal composite wear-resistant bend pipe according to claim 5, it is characterized in that, running gate system (9) described in step 10), swan neck upper end open type ingate, ingate is 3, its sectional dimension: long 40mm × wide 20mm, 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 |
| CN104674108B (en) * | 2015-02-06 | 2016-09-21 | 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 preparation method thereof |
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| CN108856642B (en) * | 2018-07-26 | 2020-06-09 | 中国兵器工业第五二研究所烟台分所有限责任公司 | Preparation method of ablation-resistant composite material fan cover |
| 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 |
| CN110513560A (en) * | 2019-09-04 | 2019-11-29 | 辽宁爱维尔金属成型科技股份有限公司 | It is a kind of for connecting the nodular cast iron pipe fittings of continuous fiber reinforcement polyethylene compound pipe |
| CN114682768B (en) * | 2022-04-07 | 2023-03-17 | 青岛正望新材料股份有限公司 | Vacuum pouring method for large casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262407A (en) * | 2000-02-01 | 2000-08-09 | 程一钱 | Weldable compound bimetal pipe |
| CN202561281U (en) * | 2012-02-28 | 2012-11-28 | 铁岭忠良防腐抗磨有限公司 | Wear-resisting pipe and wear-resisting elbow pipe |
| CN203715713U (en) * | 2013-11-21 | 2014-07-16 | 中国兵器工业第五二研究所烟台分所 | Multi-metal compound wear-resistant bend pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020136917A1 (en) * | 2001-03-26 | 2002-09-26 | Damadoran Raghu | Metallic tubular components for industrial flowstreams |
-
2013
- 2013-11-21 CN CN201310587241.6A patent/CN103667876B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262407A (en) * | 2000-02-01 | 2000-08-09 | 程一钱 | Weldable compound bimetal pipe |
| CN202561281U (en) * | 2012-02-28 | 2012-11-28 | 铁岭忠良防腐抗磨有限公司 | Wear-resisting pipe and wear-resisting elbow pipe |
| CN203715713U (en) * | 2013-11-21 | 2014-07-16 | 中国兵器工业第五二研究所烟台分所 | Multi-metal compound wear-resistant bend pipe |
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