CN106048404A - Antifatigue wear-resisting nodular iron casting for car crankshaft and preparation method of antifatigue wear-resisting nodular iron casting - Google Patents
Antifatigue wear-resisting nodular iron casting for car crankshaft and preparation method of antifatigue wear-resisting nodular iron casting Download PDFInfo
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- CN106048404A CN106048404A CN201610681041.0A CN201610681041A CN106048404A CN 106048404 A CN106048404 A CN 106048404A CN 201610681041 A CN201610681041 A CN 201610681041A CN 106048404 A CN106048404 A CN 106048404A
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- iron casting
- ferrum liquid
- nodular iron
- bag
- power
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 22
- 238000005266 casting Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 230000002929 anti-fatigue Effects 0.000 title abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 5
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 3
- 229910019064 Mg-Si Inorganic materials 0.000 claims description 3
- 229910019406 Mg—Si Inorganic materials 0.000 claims description 3
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 3
- 229910000805 Pig iron Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000011081 inoculation Methods 0.000 claims description 3
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims 1
- 238000006748 scratching Methods 0.000 claims 1
- 230000002393 scratching effect Effects 0.000 claims 1
- 229910052684 Cerium Inorganic materials 0.000 abstract description 2
- 229910052765 Lutetium Inorganic materials 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses an antifatigue wear-resisting nodular iron casting for a car crankshaft and a preparation method of the antifatigue wear-resisting nodular iron casting. The nodular iron casting is prepared from, by weight percent, 3.7%-3.9% of C, 2.1%-2.4% of Si, 0.3%-0.6% of Mn, 0.2%-0.4% of Cr, 0.15%-0.3% of Zr, 0.1%-0.2% of Hf, 0.06%-0.09% of Ce, 0.04%-0.07% of Dy, 0.03%-0.05% of Lu, not larger than 0.04% of P, not larger than 0.03% of S and the balance Fe. Cr, Zr, Hf and other metal elements are added into an alloy, so that the wear resistance of the nodular iron casting is more excellent; and Ce, Dy, Lu and other rare earth elements are added, and therefore the fatigue strength of the nodular iron casting can be remarkably improved to resist fatigue damage. The nodular iron casting for the car crankshaft is high in mechanical strength, excellent in wear resistance and fatigue resistance and long in service life.
Description
Technical field
The present invention relates to a kind of automobile crane resisting fatigue wearable ductile iron part and preparation method thereof, belong to spheroidal graphite cast-iron
Technical field.
Background technology
The birth of automobile has had the history of a century, quickly grows, has the most become the most topmost vehicles
With the important driving force spurred economic growth, also it is that people live indispensable important component part.Foundry goods is automobile product
One of important composition of parts, cast product application on auto parts and components occupies critical role.The master of automotive castings
Want feature be complex-shaped, wall thickness is relatively thin, dimensional accuracy is high, production lot is big, require that reliability is the most high.Automobile will to the greatest extent may be used
Low can alleviate own wt, it is desirable to foundry goods should be light, also to have the highest intensity.The material of past many auto parts and components
It is casting pig, the most mostly changes nodular iron casting into.
Bent axle is one of critical component of automobile engine, and its performance quality directly affects the life-span of automobile.Bent axle works
Time subject big load and the moment of flexure that is continually changing and moment of torsion effect, common failure mode is crooked fatigue fracture and axle journal mill
Damaging, therefore, this just requires that bent axle material has the anti-wear performance of higher fatigue strength and excellence.
Summary of the invention
It is an object of the invention to provide a kind of automobile crane resisting fatigue wearable ductile iron part and preparation method thereof.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of automobile crane resisting fatigue wearable ductile iron part, the percentage by weight of its each chemical constituent is: C 3.7-3.9%,
Si 2.1-2.4%、Mn 0.3-0.6%、Cr0.2-0.4%、Zr 0.15-0.3%、Hf 0.1-0.2%、Ce0.06-0.09%、Dy
0.04-0.07%, Lu0.03-0.05%, P≤0.04%, S≤0.03%, surplus is Fe.
The preparation method of a kind of car bent axle resisting fatigue wearable ductile iron part, comprises the following steps:
(1) weigh the furnace charges such as the pig iron, steel scrap, molybdenum-iron, ferrochrome, foundry returns to join medium-frequency induction furnace carries out melting, melting
Temperature is 1465-1495 DEG C, and after furnace charge all melts, sample analysis also adjusts ferrum liquid composition, is warming up to after reaching requirement
1480-1510 DEG C, be 200-400W at power, and rotating speed is magnetic agitation 14-18min under conditions of 1200-1400r/min, quiet
Put 25-40min, come out of the stove；
(2), before ferrum liquid is come out of the stove, first add in the base wells on bag dam, nodularization bag side and be equivalent to ferrum liquid quality 1.3-1.7%
Rare earth Mg-Si nodularizer, covers the silico-calcium inovulant being equivalent to ferrum liquid quality 0.4-0.7%, then at inovulant on nodulizer
Surface uniformly spreads that last layer is clean, be dried, rustless magnesium iron is considered to be worth doing and consolidated, when ferrum liquid is come out of the stove, by ferrum liquid by lid bag aperture stream
Carrying out nodularization and inoculation in entering nodularization bag, temperature controls at 1460-1480 DEG C, after treating spheroidizing reacion, immediately at ferrum
Collection swelling perlite powder is spread on liquid surface, is 300-500W at power, and frequency is ultrasonic vibration 25-under conditions of 20-40kHz
45mim, and scratch clean the scum silica frost on ferrum liquid surface, stand 15-25min, then chill block analysis is produced in sampling, and detection nodularization is qualified
After can pour into a mould；
(3) before cast, nodularization bag and bag being baked to 830-870 DEG C, pouring temperature controls at 1440-1460 DEG C, cast speed
Degree controls at 0.7-0.8kg/s；
(4) foundry goods to moulding by casting carries out heat treatment: first with the ramp of 70-90 DEG C/h to 900-950 DEG C, be incubated 2-
3h, then it is cooled to 450-500 DEG C with the speed of 30-50 DEG C/h, it is incubated 4-5h；Then Cooling Quenching in 20-40 DEG C of warm oil is put into,
Cooling 30-50s；Last microwave heating 5-7h under conditions of power is 200-300W, then be the condition of 500-600W at power
Lower microwave heating 2-3h, then microwave heating 1-2h under conditions of power is 900-1000W, air cooling of coming out of the stove.
Beneficial effects of the present invention:
The present invention is by adding the metallic elements such as Cr, Zr, Hf in the alloy so that the wearability of nodular iron casting is more excellent,
Add the rare earth elements such as Ce, Dy, Lu, the fatigue strength of nodular iron casting can be obviously enhanced, damage with resisting fatigue.The present invention
Automobile crane is high by nodular iron casting mechanical strength, and wearability and fatigue resistance are excellent, and service life is long.
Detailed description of the invention
A kind of automobile crane resisting fatigue wearable ductile iron part, the percentage by weight of its each chemical constituent is: C 3.7-
3.9%、Si 2.1-2.4%、Mn 0.3-0.6%、Cr0.2-0.4%、Zr 0.15-0.3%、Hf 0.1-0.2%、Ce0.06-
0.09%, Dy 0.04-0.07%, Lu0.03-0.05%, P≤0.04%, S≤0.03%, surplus is Fe.
The preparation method of a kind of car bent axle resisting fatigue wearable ductile iron part, comprises the following steps:
(1) weigh the furnace charges such as the pig iron, steel scrap, molybdenum-iron, ferrochrome, foundry returns to join medium-frequency induction furnace carries out melting, melting
Temperature is 1485 DEG C, and after furnace charge all melts, sample analysis also adjusts ferrum liquid composition, is warming up to 1505 DEG C after reaching requirement,
Being 300W at power, rotating speed is magnetic agitation 15min under conditions of 1300r/min, stands 30min, comes out of the stove；
(2), before ferrum liquid is come out of the stove, in the base wells on bag dam, nodularization bag side, the rare earth being equivalent to ferrum liquid quality 1.5% is first added
Mg-Si nodularizer, covers the silico-calcium inovulant being equivalent to ferrum liquid quality 0.6% on nodulizer, then uniform on inovulant surface
Spread that last layer is clean, be dried, rustless magnesium iron consider and consolidated, when ferrum liquid is come out of the stove, by ferrum liquid by lid bag aperture inflow nodularization bag
Inside carrying out nodularization and inoculation, temperature controls at 1470 DEG C, after treating spheroidizing reacion, spreads collection immediately on ferrum liquid surface and expands
Crushed crude pearlite, is 400W at power, and frequency is ultrasonic vibration 35mim under conditions of 30kHz, and scratches clean the scum silica frost on ferrum liquid surface,
Standing 20min, then chill block analysis is produced in sampling, can pour into a mould after detection nodularization is qualified；
(3) before cast, nodularization bag and bag being baked to 850 DEG C, pouring temperature controls at 1450 DEG C, and poring rate controls
0.7kg/s；
(4) foundry goods to moulding by casting carries out heat treatment: first with the ramp of 80 DEG C/h to 920 DEG C, be incubated 3h, then with 40
DEG C/speed of h is cooled to 480 DEG C, is incubated 4h；Then put into Cooling Quenching in 30 DEG C of warm oil, cool down 40s；At power it is finally
Microwave heating 6h under conditions of 250W, then microwave heating 2.5h under conditions of power is 550W, then be the bar of 900W at power
Microwave heating 1.5h under part, air cooling of coming out of the stove.
Through inspection, its mechanical property is: tensile strength 846Mpa, yield strength 704Mpa, percentage elongation 11.9%, tired strong
Degree 443Mpa.
Claims (2)
1. an automobile crane resisting fatigue wearable ductile iron part, it is characterised in that the percentage by weight of its each chemical constituent
For: C 3.7-3.9%, Si 2.1-2.4%, Mn 0.3-0.6%, Cr0.2-0.4%, Zr 0.15-0.3%, Hf 0.1-0.2%,
Ce0.06-0.09%, Dy 0.04-0.07%, Lu0.03-0.05%, P≤0.04%, S≤0.03%, surplus is Fe.
2. a preparation method for automobile crane resisting fatigue wearable ductile iron part as claimed in claim 1, its feature exists
In comprising the following steps:
Weigh the furnace charges such as the pig iron, steel scrap, molybdenum-iron, ferrochrome, foundry returns to join medium-frequency induction furnace carries out melting, smelting temperature
For 1465-1495 DEG C, after furnace charge all melts, sample analysis also adjusts ferrum liquid composition, is warming up to 1480-after reaching requirement
1510 DEG C, be 200-400W at power, and rotating speed is magnetic agitation 14-18min under conditions of 1200-1400r/min, stands 25-
40min, comes out of the stove；
Before ferrum liquid is come out of the stove, in the base wells on bag dam, nodularization bag side, first add the rare earth being equivalent to ferrum liquid quality 1.3-1.7%
Mg-Si nodularizer, covers the silico-calcium inovulant being equivalent to ferrum liquid quality 0.4-0.7%, then on inovulant surface on nodulizer
Uniformly spread that last layer is clean, be dried, rustless magnesium iron consider and consolidated, when ferrum liquid is come out of the stove, by ferrum liquid by lid bag aperture inflow ball
Carrying out nodularization and inoculation in changing bag, temperature controls at 1460-1480 DEG C, after treating spheroidizing reacion, immediately at ferrum liquid table
Collection swelling perlite powder is spread in face, is 300-500W at power, and frequency is ultrasonic vibration 25-45mim under conditions of 20-40kHz, and
Scratching clean the scum silica frost on ferrum liquid surface, stand 15-25min, then chill block analysis is produced in sampling, can enter after detection nodularization is qualified
Row cast；
Before cast, nodularization bag and bag being baked to 830-870 DEG C, pouring temperature controls at 1440-1460 DEG C, poring rate control
System is at 0.7-0.8kg/s；
(4) foundry goods to moulding by casting carries out heat treatment: first with the ramp of 70-90 DEG C/h to 900-950 DEG C, be incubated 2-
3h, then it is cooled to 450-500 DEG C with the speed of 30-50 DEG C/h, it is incubated 4-5h；Then Cooling Quenching in 20-40 DEG C of warm oil is put into,
Cooling 30-50s；Last microwave heating 5-7h under conditions of power is 200-300W, then be the condition of 500-600W at power
Lower microwave heating 2-3h, then microwave heating 1-2h under conditions of power is 900-1000W, air cooling of coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681041.0A CN106048404A (en) | 2016-08-18 | 2016-08-18 | Antifatigue wear-resisting nodular iron casting for car crankshaft and preparation method of antifatigue wear-resisting nodular iron casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681041.0A CN106048404A (en) | 2016-08-18 | 2016-08-18 | Antifatigue wear-resisting nodular iron casting for car crankshaft and preparation method of antifatigue wear-resisting nodular iron casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106048404A true CN106048404A (en) | 2016-10-26 |
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| CN201610681041.0A Pending CN106048404A (en) | 2016-08-18 | 2016-08-18 | Antifatigue wear-resisting nodular iron casting for car crankshaft and preparation method of antifatigue wear-resisting nodular iron casting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220752A (en) * | 2018-01-10 | 2018-06-29 | 芜湖市金贸流体科技股份有限公司 | A kind of high-strength high temperature-resistant spheroidal graphite cast-iron and nodular cast iron pipe fittings casting technique |
| CN108220753A (en) * | 2018-01-11 | 2018-06-29 | 芜湖市金贸流体科技股份有限公司 | A kind of production method of obdurability spheroidal graphite cast-iron |
| CN108239719A (en) * | 2018-01-11 | 2018-07-03 | 芜湖市金贸流体科技股份有限公司 | A kind of nanometer goes bad wearable ductile iron and preparation method thereof |
| CN116162847A (en) * | 2022-12-27 | 2023-05-26 | 广东美芝制冷设备有限公司 | Crankshaft for compressor, preparation method of crankshaft, compressor and refrigeration equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602878A (en) * | 2013-11-05 | 2014-02-26 | 北京工业大学 | Preparation method of high-toughness nodular cast iron |
| CN105414532A (en) * | 2012-01-31 | 2016-03-23 | 埃斯科公司 | Wear resistant material and system and method of forming wear resistant material |
-
2016
- 2016-08-18 CN CN201610681041.0A patent/CN106048404A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414532A (en) * | 2012-01-31 | 2016-03-23 | 埃斯科公司 | Wear resistant material and system and method of forming wear resistant material |
| CN103602878A (en) * | 2013-11-05 | 2014-02-26 | 北京工业大学 | Preparation method of high-toughness nodular cast iron |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220752A (en) * | 2018-01-10 | 2018-06-29 | 芜湖市金贸流体科技股份有限公司 | A kind of high-strength high temperature-resistant spheroidal graphite cast-iron and nodular cast iron pipe fittings casting technique |
| CN108220753A (en) * | 2018-01-11 | 2018-06-29 | 芜湖市金贸流体科技股份有限公司 | A kind of production method of obdurability spheroidal graphite cast-iron |
| CN108239719A (en) * | 2018-01-11 | 2018-07-03 | 芜湖市金贸流体科技股份有限公司 | A kind of nanometer goes bad wearable ductile iron and preparation method thereof |
| CN116162847A (en) * | 2022-12-27 | 2023-05-26 | 广东美芝制冷设备有限公司 | Crankshaft for compressor, preparation method of crankshaft, compressor and refrigeration equipment |
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Application publication date: 20161026 |