CN106270410A - A kind of casting technique of wheel hub - Google Patents
A kind of casting technique of wheel hub Download PDFInfo
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- CN106270410A CN106270410A CN201510354480.6A CN201510354480A CN106270410A CN 106270410 A CN106270410 A CN 106270410A CN 201510354480 A CN201510354480 A CN 201510354480A CN 106270410 A CN106270410 A CN 106270410A
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Abstract
The invention belongs to casting field, be specifically related to the casting technique of a kind of wheel hub.This technique comprises following step: the design of (1) apperance: the design of running gate system, core, rising head and chill；(2) sand mold makes: moulding uses sodium silicate sand CO2 method, makes core and uses from hard cold-box process；(3) melting；(4) cast；(5) cooling；(6) annealing.It is the most up to standard that the present invention solves wheel hub annealed structure, solves wheelboss flange packing portion casting shrinkage porosite and crackle quality problems, has ensured the serviceability of wheel hub.A kind of wheel hub casting technique schematic diagram that accompanying drawing provides for the present invention, description of symbols is as follows: 1, sprue, and 2, rising head air flue, 3, rising head, 4, core air flue, 5, core, 6, foundry goods, 7, cross gate, 8, ingate, 9, chill, 10, anti-ceasma.
Description
Technical field
The invention belongs to casting field, be specifically related to the casting technique of a kind of wheel hub.
Background technology
Wheel hub is part in bulldozer final drive parts, connects gear ring and sprocket wheel, it is ensured that running gear normal
Operating.Now wheel hub fracture is caused to cause bull-dozer to be paralysed due to wheelboss flange packing portion casting shrinkage porosite and crackle,
Impact is normal to be used；In wheel hub annealed structure, Widmannstatten structure exceeds standard, and follow-up modifier treatment is difficult to eliminate, and causes
Quenched rear ferrite slabbing is the most block, causes very big hidden danger of quality.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, it is provided that the casting technique of a kind of wheel hub.
The present invention is achieved through the following technical solutions:
The casting technique of a kind of wheel hub, comprises following step:
(1) design of apperance: the design of wheel hub running gate system, core, rising head and chill.
(2) sand mold makes: moulding uses sodium silicate sand CO2 method, makes core and uses from hard cold-box process,
To sand mold, sand mold inner chamber coating fireproof coating, it is placed in drying oven, dries temperature and be 400-450 DEG C, dry
The dry time is 20-25min, be cooled to 150-200 DEG C standby.
(3) melting: use medium-frequency induction furnace (1000-3000Hz) melting, steel scrap is added in electric furnace,
Treating intensification 1600-1650 DEG C, add ferrosilicon, ferromanganese, insulation 20-25min obtains molten steel.The chemistry of molten steel
Composition: C content 0.40-0.47%, Si content 0.30-0.80%, Mn content 0.7-1.4%, P content is less than
0.035%, S content is less than 0.035%, and Cu content is less than 0.30%, and Ni content is less than 0.30%, Cr content
Less than 0.30%, Mo content is less than 0.30%, and remaining is Fe.
(4) cast: the molten steel that step (3) obtains is poured in step (2) in sand mold, pouring temperature
For 1510-1550 DEG C, the duration of pouring is 18-20s, after shake out time is 8h.
(5) cooling: room temperature after shake out cooling, peeling foundry goods, obtains hub cast after ball blast.
(6) annealing: be heated to 600-650 DEG C, constant temperature 1h, again intensification 840-860 DEG C, constant temperature 4h,
Stopping heating cooling to 200 DEG C with the furnace and comes out of the stove.
Described a kind of wheel hub casting technique, the design of described wheel hub running gate system: down gate 1, size
φ40mm；Runner gate 1, size 45 × 34 × 45 (mm)；Ingate 1；Size: 55 × 45 × 40
(mm)。
Described a kind of wheel hub casting technique, described wheel hub core design: air flue, size are set in the middle of core
φ20mm；Core middle and lower part arranges anti-ceasma, puts into bubble and mould gasified pattern, size 60 × 90 × 90 (mm) when making core.
Described a kind of wheel hub casting technique, described wheel hub rising head and chill design: rising head 1: φ 285 ×
φ 330 × 200 (mm), rising head air flue 4 is evenly distributed on wheel hub rising head, size φ 50mm；External
Chill 4 pieces is evenly distributed in wheelboss flange end endoporus core.
Described a kind of wheel hub casting technique, described CO2-sodium silicate sand is that quartz sand adds a certain amount of clay
Sand, clay (mass fraction: 3～6%), bentonite (mass fraction: 1～3%), flake asbestos (divide by quality
Number: 5%), wood flour (mass fraction: 1.5%), sodium silicate (mass fraction: 4.5～8.0%), water (matter
Amount mark: 10-15%).
Described a kind of wheel hub casting technique, described is to add aryl sulfonic acid (matter in silica sand from hard cold-box process
Amount mark: 0.3-0.5%), furane resins (mass fraction: 1.5-2%).
Described a kind of wheel hub casting technique, described ferrosilicon (mass fraction: 0.3-0.5%) and ferromanganese (matter
Amount mark: 0.7-1%).
Described a kind of wheel hub casting technique, described annealing process is heated to the speed more than 70 DEG C/h
600-650 DEG C, constant temperature 1h；With the ramp more than 100 DEG C/h to 840-860 DEG C, constant temperature 4h；Stop
Heating is come out of the stove after cooling to 200 DEG C with the furnace.
The invention has the beneficial effects as follows that to solve wheel hub annealed structure the most up to standard, solve wheelboss flange packing portion
Casting shrinkage porosite and crackle quality problems, ensured the serviceability of wheel hub.
Accompanying drawing explanation
Fig. 1 is a kind of wheel hub casting technique schematic diagram that the present invention provides.
Fig. 2 is a kind of wheel hub annealing process figure that the present invention provides.
Wherein, description of reference numerals is as follows: 1, sprue, and 2, rising head air flue, 3, rising head, 4, core
Air flue, 5, core, 6, foundry goods, 7, cross gate, 8, ingate, 9, chill, 10, anti-ceasma.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.Following example are only used for clearly saying
Bright technical scheme, and can not limit the scope of the invention with this.
Embodiment 1
In the present embodiment, the casting technique of a kind of wheel hub, comprise following step:
(1) design of apperance: the design of wheel hub running gate system, down gate 1, size φ 40mm；Horizontal water
1, mouth, size 45 × 34 × 45 (mm)；Ingate 1；Size: 55 × 45 × 40 (mm)；Wheel hub
Core design: air flue, size φ 20mm are set in the middle of core；Core middle and lower part arranges anti-ceasma, when making core
Put into bubble and mould gasified pattern, size 60 × 90 × 90 (mm)；Wheel hub rising head and chill design: rising head 1: φ
285 × φ 330 × 200 (mm), rising head air flue 4 is evenly distributed on wheel hub rising head, size φ 50mm；
External chill 4 pieces is evenly distributed in wheelboss flange end endoporus core.
(2) sand mold makes: moulding uses sodium silicate sand CO2 method, quartz sand 100 parts, clay-bonded sand, viscous
3 parts of soil, bentonite 1 part, flake asbestos 5 parts, wood flour 1.5 parts, sodium silicate 5 parts, 10 parts of water, mixed
The sand time is 8 minutes；Make core to use from hard cold-box process, silica sand 100 parts, furane resins 1.5 parts, virtue
Base sulfonic acid 0.3 part, is firstly added aryl sulfonic acid, until adding furane resins after being coated with sand completely, mixed
The sand time is 10 minutes.Obtain sand mold, sand mold inner chamber coating fireproof coating, be placed in drying oven, dry
Temperature is 400 DEG C, and drying time is 25min, be cooled to 150 DEG C standby.
(3) melting: use medium-frequency induction furnace (1000-3000Hz) melting, steel scrap is added in electric furnace,
Wait to heat up 1600 DEG C, add ferrosilicon be the mass fraction 0.3% of molten steel, ferromanganese be the mass fraction 0.7% of molten steel,
Insulation 20min obtains molten steel.The chemical composition of molten steel: C content 0.42%, Si content 0.42%, Mn content
0.85%, P content 0.025%, S content 0.025%, Cu content 0.01%, Ni content 0.05%, Cr content
0.03%, Mo content 0.02%, remaining is Fe.
(4) cast: the molten steel that step (3) obtains is poured in step (2) in sand mold, pouring temperature
Being 1510 DEG C, the duration of pouring is 18s, after shake out time is 8h.
(5) cooling: room temperature after shake out cooling, peeling foundry goods, obtains hub cast after ball blast.
(6) annealing: be heated to 610 DEG C with the speed of 70 DEG C/h, constant temperature 1h；Speed with 100 DEG C/h
It is warming up to 845 DEG C, constant temperature 4h；Stop coming out of the stove after heating cools to 200 DEG C with the furnace.
Embodiment 2
In the present embodiment, the casting technique of a kind of wheel hub, comprise following step:
(1) design of apperance: the design of wheel hub running gate system, down gate 1, size φ 40mm；Horizontal water
1, mouth, size 45 × 34 × 45 (mm)；Ingate 1；Size: 55 × 45 × 40 (mm)；Wheel hub
Core design: air flue, size φ 20mm are set in the middle of core；Core middle and lower part arranges anti-ceasma, when making core
Put into bubble and mould gasified pattern, size 60 × 90 × 90 (mm)；Wheel hub rising head and chill design: rising head 1: φ
285 × φ 330 × 200 (mm), rising head air flue 4 is evenly distributed on wheel hub rising head, size φ 50mm；
External chill 4 pieces is evenly distributed in wheelboss flange end endoporus core.
(2) sand mold makes: moulding uses sodium silicate sand CO2 method, quartz sand 100 parts, clay-bonded sand, viscous
5 parts of soil, bentonite 2 parts, flake asbestos 5 parts, wood flour 1.5 parts, sodium silicate 6 parts, 12 parts of water, mixed
The sand time is 10 minutes；Make core to use from hard cold-box process, silica sand 100 parts, furane resins 1.8 parts, virtue
Base sulfonic acid 0.4 part, is firstly added aryl sulfonic acid, until adding furane resins after being coated with sand completely, mixed
The sand time is 12 minutes.Obtain sand mold, sand mold inner chamber coating fireproof coating, be placed in drying oven, dry
Temperature is 420 DEG C, and drying time is 23min, be cooled to 180 DEG C standby.
(3) melting: use medium-frequency induction furnace (1000-3000Hz) melting, steel scrap is added in electric furnace,
Wait to heat up 1630 DEG C, add ferrosilicon be the mass fraction 0.4% of molten steel, ferromanganese be the mass fraction 0.8% of molten steel,
Insulation 22min obtains molten steel.The chemical composition of molten steel: C content 0.45%, Si content 0.52%, Mn content
1.1%, P content 0.015%, S content 0.01%, Cu content 0.05%, Ni content 0.04%, Cr content
0.08%, Mo content 0.06%, remaining is Fe.
(4) cast: the molten steel that step (3) obtains is poured in step (2) in sand mold, pouring temperature
Being 1530 DEG C, the duration of pouring is 19s, after shake out time is 8h.
(5) cooling: room temperature after shake out cooling, peeling foundry goods, obtains hub cast after ball blast.
(6) annealing: be heated to 630 DEG C with the speed of 80 DEG C/h, constant temperature 1h；Speed with 120 DEG C/h
It is warming up to 850 DEG C, constant temperature 4h；Stop coming out of the stove after heating cools to 200 DEG C with the furnace.
Embodiment 3
In the present embodiment, the casting technique of a kind of wheel hub, comprise following step:
(1) design of apperance: the design of wheel hub running gate system, down gate 1, size φ 40mm；Horizontal water
1, mouth, size 45 × 34 × 45 (mm)；Ingate 1；Size: 55 × 45 × 40 (mm)；Wheel hub
Core design: air flue, size φ 20mm are set in the middle of core；Core middle and lower part arranges anti-ceasma, when making core
Put into bubble and mould gasified pattern, size 60 × 90 × 90 (mm)；Wheel hub rising head and chill design: rising head 1: φ
285 × φ 330 × 200 (mm), rising head air flue 4 is evenly distributed on wheel hub rising head, size φ 50mm；
External chill 4 pieces is evenly distributed in wheelboss flange end endoporus core.
(2) sand mold makes: moulding uses sodium silicate sand CO2 method, quartz sand 100 parts, clay-bonded sand, viscous
6 parts of soil, bentonite 3 parts, flake asbestos 5 parts, wood flour 1.5 parts, sodium silicate 8 parts, 15 parts of water, mixed
The sand time is 12 minutes；Make core to use from hard cold-box process, silica sand 100 parts, furane resins 2 parts, aryl
Sulfonic acid 0.5 part, is firstly added aryl sulfonic acid, until adding furane resins, mulling after being coated with sand completely
Time is 15 minutes.Obtain sand mold, sand mold inner chamber coating fireproof coating, be placed in drying oven, dry temperature
Degree is 450 DEG C, and drying time is 20min, be cooled to 200 DEG C standby.
(3) melting: use medium-frequency induction furnace (1000-3000Hz) melting, steel scrap is added in electric furnace,
Wait to heat up 1650 DEG C, add ferrosilicon be the mass fraction 0.5% of molten steel, ferromanganese be the mass fraction 1.0% of molten steel,
Insulation 25min obtains molten steel.The chemical composition of molten steel: C content 0.43%, Si content 0.63%, Mn content
1.3%, P content 0.023%, S content 0.026%, Cu content 0.1%, Ni content 0.12%, Cr content
0.18%, Mo content 0.12%, remaining is Fe.
(4) cast: the molten steel that step (3) obtains is poured in step (2) in sand mold, pouring temperature
Being 1550 DEG C, the duration of pouring is 20s, after shake out time is 8h.
(5) cooling: room temperature after shake out cooling, peeling foundry goods, obtains hub cast after ball blast.
(6) annealing: be heated to 650 DEG C with the speed of 90 DEG C/h, constant temperature 1h；Speed with 110 DEG C/h
It is warming up to 860 DEG C, constant temperature 4h；Stop coming out of the stove after heating cools to 200 DEG C with the furnace.
The above, be only presently preferred embodiments of the present invention, and not the structure to the present invention makees any shape
Restriction in formula.Every technical spirit according to the present invention to any simple modification made for any of the above embodiments,
Equivalent variations and modification, all still fall within the range of technical scheme.
Claims (8)
1. a casting technique for wheel hub, is characterized in that, comprises following step:
(1) design of apperance: the design of wheel hub running gate system, core, rising head and chill.
(2) sand mold makes: moulding uses sodium silicate sand CO2 method, makes core and uses from hard cold-box process,
To sand mold, sand mold inner chamber coating fireproof coating, it is placed in drying oven, dries temperature and be 400-450 DEG C, dry
The dry time is 20-25min, be cooled to 150-200 DEG C standby.
(3) melting: use medium-frequency induction furnace (1000-3000Hz) melting, steel scrap is added in electric furnace,
Treating intensification 1600-1650 DEG C, add ferrosilicon, ferromanganese, insulation 20-25min obtains molten steel.The chemistry of molten steel
Composition: C content 0.40-0.47%, Si content 0.30-0.80%, Mn content 0.7-1.4%, P content is less than
0.035%, S content is less than 0.035%, and Cu content is less than 0.30%, and Ni content is less than 0.30%, Cr content
Less than 0.30%, Mo content is less than 0.30%, and remaining is Fe.
(4) cast: the molten steel that step (3) obtains is poured in step (2) in sand mold, pouring temperature
For 1510-1550 DEG C, the duration of pouring is 18-20s, after shake out time is 8h.
(5) cooling: room temperature after shake out cooling, peeling foundry goods, obtains hub cast after ball blast.
(6) annealing: be heated to 600-650 DEG C, constant temperature 1h, again intensification 840-860 DEG C, constant temperature 4h,
Stopping heating cooling to 200 DEG C with the furnace and comes out of the stove.
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, the cast of described wheel hub is
The design of system: down gate 1, size φ 40mm；Runner gate 1, size 45 × 34 × 45 (mm)；In
1, cast gate；Size: 55 × 45 × 40 (mm).
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described wheel hub core sets
Meter: air flue, size φ 20mm are set in the middle of core；Core middle and lower part arranges anti-ceasma, puts into bubble when making core
Mould gasified pattern, size 60 × 90 × 90 (mm).
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described wheel hub rising head and
Chill designs: rising head 1: φ 285 × φ 330 × 200 (mm), rising head air flue 4 is evenly distributed on wheel
On hub rising head, size φ 50mm；External chill 4 pieces is evenly distributed in wheelboss flange end endoporus core.
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described CO2-sodium water glass
Glass sand is that quartz sand adds a certain amount of clay-bonded sand, clay (mass fraction: 3～6%), and bentonite (divide by quality
Number: 1～3%), flake asbestos (mass fraction: 5%), wood flour (mass fraction: 1.5%), sodium silicate (matter
Amount mark: 4.5～8.0%), water (mass fraction: 10-15%).
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described from hard cold-box
Method is to add aryl sulfonic acid (mass fraction: 0.3-0.5%), furane resins (mass fraction: 1.5-2%) in silica sand.
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described ferrosilicon (quality
Mark: 0.3-0.5%) and ferromanganese (mass fraction: 0.7-1%).
A kind of wheel hub casting technique the most according to claim 1, is characterized in that, described annealing process with
Speed more than 70 DEG C/h is heated to 600-650 DEG C, constant temperature 1h；With the ramp more than 100 DEG C/h extremely
840-860 DEG C, constant temperature 4h；Stop coming out of the stove after heating cools to 200 DEG C with the furnace.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107127305A (en) * | 2017-05-27 | 2017-09-05 | 河北隆春通用设备制造有限责任公司 | A kind of wheel hub casting mould |
| CN107138693A (en) * | 2017-04-27 | 2017-09-08 | 柳州聚龙科技有限公司 | The method of wheel hub casting |
| CN107199318A (en) * | 2017-04-27 | 2017-09-26 | 柳州聚龙科技有限公司 | The manufacture method of automobile bearing casting |
| CN108393436A (en) * | 2018-03-06 | 2018-08-14 | 江门市广进铸锻有限公司 | Wheel hub manufactures sand core and hub manufacturing technology |
| CN111069537A (en) * | 2019-12-27 | 2020-04-28 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
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| CN111069537A (en) * | 2019-12-27 | 2020-04-28 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
| CN111069537B (en) * | 2019-12-27 | 2021-08-24 | 大连船用推进器有限公司 | Inverted modeling structure of marine controllable pitch propeller oil cylinder |
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