CN105970075A - Technique for preparing vermicular cast iron material - Google Patents
Technique for preparing vermicular cast iron material Download PDFInfo
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- CN105970075A CN105970075A CN201610560757.5A CN201610560757A CN105970075A CN 105970075 A CN105970075 A CN 105970075A CN 201610560757 A CN201610560757 A CN 201610560757A CN 105970075 A CN105970075 A CN 105970075A
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- 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
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
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- 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
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a technique for preparing a vermicular cast iron material. The technique comprises the following steps: smelting pig iron to a molten state, adding foundry returns and scrap steel, regulating each component in the molten iron to the target range, uniformly spreading a nodulizer rare-earth silicon-iron-magnesium alloy on a side pit on the bottom of a preheated molten iron nodulizing ladle, uniformly spreading rare-earth silicon iron on the nodulizer rare-earth silicon-iron-magnesium alloy, heating the molten iron to 1430-1460 DEG C, and injecting the molten iron from the other side of the molten iron nodulizing ladle to the specified molten iron quantity; and after the molten iron in the molten iron nodulizing ladle is detonated under the action of the nodulizer rare-earth silicon-iron-magnesium alloy, quickly and uniformly adding an inoculant 75SiFe, stirring and removing slag. The technique is simple in the preparation method and easy to operate, and can obtain the vermicular cast iron of castings with different wall thicknesses of which the vermicularity is stable at 80% or above. The obtained vermicular cast iron can be widely used for cylinder blocks, cylinder lids and flywheels of automobile and marine engine cylinders, and is capable of lowering the production cost, enhancing the properties of the accessories and increasing the fuel utilization ratio.
Description
Technical field
The present invention relates to a kind of process preparing vermicular graphite iron material, belong to the technical field of casting iron craft.
Background technology
Vermicular cast iron, as a kind of cast iron material, has the performance of spheroidal graphite cast-iron and casting pig, Yi Jiliang concurrently
Good thermal fatigue property, automobile, marine engine gray iron, exhaustor, brake disc, brake drum,
The application of the aspects such as flywheel achieves good effect.The vermicularizing treating process of traditional vermicular cast iron uses
It is typically the vermiculizer containing magnesium and carries out creepage rate.Its compactedization quality is limited by vermiculizer quality, usually because
There are quality problems in the vermiculizer of buying, causes nodulizing rate low or not compactedization, causes certain loss to producing.
Summary of the invention
The invention aims to solve tradition vermicular cast iron preparation process and be easily generated that nodulizing rate is low or not scholar
The problem affecting quality, it is provided that a kind of preparation method is simple, and what step was easily operated prepares vermicular cast iron material
The process of material.
The present invention adopts the following technical scheme that a kind of process preparing vermicular graphite iron material, and step is as follows:
(1) weight percent takes 60～the foundry returns of the pig iron of 80%, 10～20% and 10～30% steel scrap
For raw material；
(2) use middle frequency furnace that raw material is carried out melting, be firstly added pig iron melting to molten condition, then
Being sequentially added into foundry returns, steel scrap, middle frequency furnace is warming up to 1400～1450 DEG C, makes molten iron；
(3) chemical composition content of molten iron in direct-reading capacitance meter device detecting step (2) is used, according to
Testing result adds carburant, alloy adjusts chemical composition content and presses quality to target zone, target zone
Percentages is: C is 3.60～3.90%, and Si is 1.00～1.20%, and Mn is≤0.50%, and P is≤0.10%,
S is≤0.020%；
(4) according to the sulfur content in molten iron, precise be molten steel quality 0.15～0.25% nodulizer dilute
Soil ferrosilicon magnesium alloy and 0.35～the rare earth ferrosilicon alloy of 0.45%, uses the molten iron in middle frequency furnace to pour nodularization
Nodularization bag is preheated by bag；
(5) by load weighted nodulizer RE-Mg-ferrosilicon alloy uniform spreading bottom warmed-up liquid iron balling bag
Hole, side in, then by the rare earth ferrosilicon uniform spreading that weighs up on nodulizer RE-Mg-ferrosilicon alloy；
(6) molten iron is warming up to 1430 DEG C～1460 DEG C, molten iron is poured hole from the opposite side of liquid iron balling bag
In；
(7) after the molten iron in liquid iron balling bag detonates under the effect of nodulizer RE-Mg-ferrosilicon alloy, soon
Speed adds inovulant 75SiFe and ensures to add before the outburst of nodulizer RE-Mg-ferrosilicon alloy terminates, inovulant
The addition of 75SiFe is the 1.6～1.8% of molten steel quality；
(8) stirring is skimmed, cast chill block detection compactedization situation, if test block is the most spherical, adds molten iron and enters
Row sum-equal matrix, if the inclined lamellar of test block, then adds rare earth ferrosilicon alloy and is adjusted, survey molten iron temperature, cast examination
Block, and prepare pouring cast part.
Further, the percent mass of the nodulizer RE-Mg-ferrosilicon alloy middle rare earth in described step (4) contains
Amount is 0.8～1.6%, and the weight/mass percentage composition of Mg is 7.0～9.0%, and the weight/mass percentage composition of Si is
The weight/mass percentage composition of 40.0～44.0%, Ba is 0.5～2.0%, and the weight/mass percentage composition of Ca is 1.5～2.5%,
Remaining is ferrum.
Further, the weight/mass percentage composition of the rare earth ferrosilicon middle rare earth in described step (4) is
The weight/mass percentage composition of 27.0～30.0%, Si is≤42.0%, and the weight/mass percentage composition of Mn is≤2.0%, Ca
Weight/mass percentage composition be≤5.0%, the weight/mass percentage composition of Ti is≤2.0%, and remaining is ferrum.
Further, in described inovulant 75SiFe, the weight/mass percentage composition of Si is 72.0～80.0%, Mn's
Weight/mass percentage composition is≤0.5%, and the weight/mass percentage composition of Al is≤1.5%, the weight/mass percentage composition of Ca is≤
1.0%, remaining is ferrum.
Further, in described step (8), each constituent chemical components of test block is by weight percentage: C
Being 3.60～3.90%, Si is 2.40%～3.00%, and Mn is≤0.50%, and P is≤0.10%, S is≤
0.015%, Re are 0.03%～0.08%, and remaining is ferrum.
Preparation method of the present invention is simple, and step is easily operated, and the nodulizing rate that can obtain different wall foundry goods is stable
Vermicular cast iron more than 80%, the vermicular cast iron prepared can be widely applied for automobile, marine engine
Cylinder block, cylinder cap, flywheel, can reduce the production cost of high-performing car, marine engine, improve it
Accessory performance, improves fuel availability, saves the energy.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment one:
The trade mark of cast vermicular cast iron is RuT300 (JB/T4403-1999), and step is as follows:
(1) taking Shahe Q10 pig iron 3000kg, foundry returns 500kg and steel scrap 1500kg is raw material；
(2) use 5 tons of medium-frequency induction furnace melting raw materials, be firstly added the Shahe Q10 pig iron to molten condition
After, sequentially adding foundry returns and steel scrap, medium-frequency induction furnace is warming up to 1400 DEG C；
(3) chemical composition of Germany's SPECTRO direct-reading capacitance meter device detection molten iron, its composition are used
For: C is 3.71%, and Si is 1.17%, and Mn is 0.18%, and P is 0.044%, and S is 0.023%.Root
Add 10kg manganeisen according to testing result and adjust the content of manganese.
(4) preparation processes 3 tons of molten iron, chooses 3 tons of liquid iron balling bags and preheats, and weighs simultaneously and needs to process
The rare earth ferrosilicon 10.5kg of nodulizer RE-Mg-ferrosilicon alloy 4.5kg and 0.35% of molten steel quality 0.15%；
(5) by the nodulizer RE-Mg-ferrosilicon alloy 4.5kg uniform spreading that weighs up at 3 tons of warmed-up molten iron balls
Change in the hole, side bottom bag, then by the rare earth ferrosilicon 10.5kg uniform spreading that weighs up at nodulizer rare earth-Si-Fe-Mg
Above alloy；
(6) molten iron is warming up to 1460 DEG C come out of the stove, pours molten iron to rule from the opposite side of 3 tons of liquid iron balling bags
Fixed iron water amount；
(7) treat that the molten iron in 3 tons of liquid iron balling bags detonates under the effect of nodulizer RE-Mg-ferrosilicon alloy
After, Quick uniform addition processes the 1.8%75SiFe inovulant 54kg of molten steel quality.
(8) stirring is skimmed, and cast chill block detection compactedization is good, pours into a mould test block, surveys molten iron temperature 1365
DEG C, pour into a mould Wheel casting.
(9) test block and flywheel are incubated 3 hours with 560 DEG C of heat treatments of stove.
(10) test block detection.
After testing, this vermicular cast iron comprises each component of following weight/mass percentage composition: C content is 3.71%,
Si content is 2.73%, and Mn content is 0.29%, P content 0.043%, S content 0.011%, and Re is
0.043%.The performance test results is as shown in table 1.
Embodiment two:
The trade mark of cast vermicular cast iron is RuT300 (JB/T4403-1999), and step is as follows:
(1) taking Shahe Q10 pig iron 3500kg, foundry returns 750kg and steel scrap 750kg is raw material；
(2) use 5 tons of medium-frequency induction furnace melting raw materials, be firstly added the Shahe Q10 pig iron to molten condition
After, sequentially adding foundry returns and steel scrap, medium-frequency induction furnace is warming up to 1400 DEG C；
(3) after using the chemical composition content of Germany's SPECTRO direct-reading capacitance meter device detection molten iron,
Add carburant according to testing result, alloy adjusts chemical composition content
Being adjusted to by mass percentage by the content of composition each in molten iron: C is 3.75%, Si is 1.10%,
Mn is 0.30%, and P is 0.040%, and S is 0.015%.
(4) preparation processes 3 tons of molten iron, chooses 3 tons of liquid iron balling bags and preheats, and weighs simultaneously and needs to process
The rare earth ferrosilicon alloy 12kg of nodulizer RE-Mg-ferrosilicon alloy 6kg and 0.40% of molten steel quality 0.20%；
(5) by the nodulizer RE-Mg-ferrosilicon alloy 6kg uniform spreading that weighs up at 3 tons of warmed-up liquid iron ballings
In hole, side bottom bag, then by the rare earth ferrosilicon 12kg uniform spreading that weighs up at nodulizer RE-Mg-ferrosilicon alloy
Above；
(6) molten iron is warming up to 1450 DEG C come out of the stove, pours molten iron to rule from the opposite side of 3 tons of liquid iron balling bags
Fixed iron water amount；
(7) treat that the molten iron in 3 tons of liquid iron balling bags detonates under the effect of nodulizer RE-Mg-ferrosilicon alloy
After, Quick uniform addition processes the 1.7%75SiFe inovulant 51kg of molten steel quality.
(8) stirring is skimmed, and cast chill block detection compactedization is good, pours into a mould test block, surveys molten iron temperature 1362
DEG C, pour into a mould Wheel casting.
(9) test block and flywheel are incubated 3 hours with 560 DEG C of heat treatments of stove.
(10) test block detection.
After testing, this vermicular cast iron comprises each component of following weight/mass percentage composition: C content is 3.74%,
Si content is 2.68%, and Mn content is 0.25%, P content 0.045%, S content 0.009%, and Re is
0.045%.The properties data that test block detects are as shown in table 1.
The properties data that test block detects are as shown in table 1.
Embodiment three:
The trade mark of cast vermicular cast iron is RuT300 (JB/T4403-1999), and step is as follows:
(1) taking Shahe Q10 pig iron 4000kg, foundry returns 500kg and steel scrap 500kg is raw material；
(2) use 5 tons of medium-frequency induction furnace melting raw materials, be firstly added the Shahe Q10 pig iron to molten condition
After, sequentially adding foundry returns and steel scrap, medium-frequency induction furnace is warming up to 1400 DEG C；
(3) chemical composition of Germany's SPECTRO direct-reading capacitance meter device detection molten iron, its composition are used
For: C is 3.81%, and Si is 0.96%, and Mn is 0.14%, and P is 0.046%, and S is 0.024%.Root
The content of manganese is adjusted according to testing result addition 10kg75 ferrosilicon, 10kg ferromanganese.
(4) preparation processes 3 tons of molten iron, chooses 3 tons of liquid iron balling bags and preheats, and weighs simultaneously and needs to process
The rare earth ferrosilicon 13.5kg of nodulizer RE-Mg-ferrosilicon alloy 7.5kg and 0.45% of molten steel quality 0.25%；
(5) by the nodulizer RE-Mg-ferrosilicon alloy 7.5kg uniform spreading that weighs up at 3 tons of warmed-up molten iron balls
Change in the hole, side bottom bag, then by the rare earth ferrosilicon 13.5kg uniform spreading that weighs up at nodulizer rare earth-Si-Fe-Mg
Above alloy；
(6) molten iron is warming up to 1430 DEG C come out of the stove, pours molten iron to rule from the opposite side of 3 tons of liquid iron balling bags
Fixed iron water amount；
(7) treat that the molten iron in 3 tons of liquid iron balling bags detonates under the effect of nodulizer RE-Mg-ferrosilicon alloy
After, Quick uniform addition processes the 1.6%75SiFe inovulant 48kg of molten steel quality.
(8) stirring is skimmed, and cast chill block detection compactedization is good, pours into a mould test block, surveys molten iron temperature 1355
DEG C, pour into a mould Wheel casting.
(9) test block and flywheel are incubated 3 hours with 560 DEG C of heat treatments of stove.
(10) test block detection.
After testing, this vermicular cast iron comprises each component of following weight/mass percentage composition: C content is 3.79%,
Si content is 2.53%, and Mn content is 0.26%, P content 0.046%, S content 0.008%, and Re is
0.053%.The performance test results is as shown in table 1.
Table 1
As shown in Table 1, the process embodiment one of the present invention, embodiment two and embodiment three is used to prepare
The tensile strength of the vermicular cast iron obtained reaches 421MPa, and yield strength is up to 333MPa, and three realities
Elongation percentage and the nodulizing rate of executing the vermicular cast iron that example prepares all have reached RuT300 standard value.
Claims (5)
1. the process preparing vermicular graphite iron material, it is characterised in that: step is as follows:
(1) weight percent take 60～the foundry returns of the pig iron of 80%, 10～20% and 10～30% steel scrap be raw material；
(2) using middle frequency furnace that raw material is carried out melting, be firstly added pig iron melting to molten condition, be then sequentially added into foundry returns, steel scrap, middle frequency furnace is warming up to 1400 ~ 1450 DEG C, makes molten iron；
(3) chemical composition content of molten iron in direct-reading capacitance meter device detecting step (2) is used, add carburant according to testing result, alloy adjusts chemical composition content to target zone, target zone is by mass percentage: C is 3.60 ~ 3.90%, Si is 1.00 ~ 1.20%, Mn is≤0.50%, P is≤0.10%, and S is≤0.020%；
(4) according to the sulfur content in molten iron, precise is molten steel quality 0.15～the nodulizer RE-Mg-ferrosilicon alloy of 0.25% and 0.35～the rare earth ferrosilicon alloy of 0.45%, uses the molten iron in middle frequency furnace to pour nodularization bag and preheats nodularization bag；
(5) by load weighted nodulizer RE-Mg-ferrosilicon alloy uniform spreading hole, side bottom warmed-up liquid iron balling bag, then by the rare earth ferrosilicon uniform spreading that weighs up on nodulizer RE-Mg-ferrosilicon alloy；
(6) molten iron is warming up to 1430 DEG C～1460 DEG C, molten iron is poured in hole from the opposite side of liquid iron balling bag；
(7) after the molten iron in liquid iron balling bag detonates under the effect of nodulizer RE-Mg-ferrosilicon alloy, rapidly joining inovulant 75SiFe and ensure to add before the outburst of nodulizer RE-Mg-ferrosilicon alloy terminates, the addition of inovulant 75SiFe is the 1.6～1.8% of molten steel quality；
(8) stirring is skimmed, cast chill block detection compactedization situation, if test block is the most spherical, adds molten iron and is adjusted, if the inclined lamellar of test block, then adds rare earth ferrosilicon alloy and is adjusted, survey molten iron temperature, pour into a mould test block, and prepare pouring cast part.
Prepare the process of vermicular graphite iron material the most as claimed in claim 1, it is characterized in that: the weight/mass percentage composition of the nodulizer RE-Mg-ferrosilicon alloy middle rare earth in described step (4) is 0.8 ~ 1.6%, the weight/mass percentage composition of Mg is 7.0 ~ 9.0%, the weight/mass percentage composition of Si is 40.0 ~ 44.0%, the weight/mass percentage composition of Ba is 0.5 ~ 2.0%, the weight/mass percentage composition of Ca is 1.5 ~ 2.5%, and remaining is ferrum.
Prepare the process of vermicular graphite iron material the most as claimed in claim 1, it is characterized in that: the weight/mass percentage composition of the rare earth ferrosilicon middle rare earth in described step (4) is 27.0 ~ 30.0%, the weight/mass percentage composition of Si is≤42.0%, the weight/mass percentage composition of Mn is≤2.0%, the weight/mass percentage composition of Ca is≤5.0%, the weight/mass percentage composition of Ti is≤2.0%, and remaining is ferrum.
Prepare the process of vermicular graphite iron material the most as claimed in claim 1, it is characterized in that: in described inovulant 75SiFe, the weight/mass percentage composition of Si is 72.0 ~ 80.0%, the weight/mass percentage composition of Mn is≤0.5%, the weight/mass percentage composition of Al is≤1.5%, the weight/mass percentage composition of Ca is≤1.0%, and remaining is ferrum.
Prepare the process of vermicular graphite iron material the most as claimed in claim 1, it is characterized in that: in described step (8), each constituent chemical components of test block is by weight percentage: C is 3.60 ~ 3.90%, Si is 2.40% ~ 3.00%, Mn is≤0.50%, P is≤0.10%, S is≤0.015%, and Re is 0.03% ~ 0.08%, and remaining is ferrum.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982977A (en) * | 2019-12-23 | 2020-04-10 | 山东时风（集团）有限责任公司 | Preparation method of vermicular graphite cast iron automobile exhaust manifold |
| CN113621750A (en) * | 2020-05-06 | 2021-11-09 | 驻马店中集华骏铸造有限公司 | Method for producing vermicular cast iron |
| CN115386785A (en) * | 2022-08-22 | 2022-11-25 | 中国第一汽车股份有限公司 | Smelting and pouring process of high-strength gray cast iron cylinder cover casting |
| WO2024011299A1 (en) * | 2022-07-12 | 2024-01-18 | Tupy S.A. | High mechanical strength and high thermal conductivity vermicular cast iron alloy, high mechanical strength and high thermal conductivity vermicular cast iron alloy manufacturing process, and internal combustion engine part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285633A (en) * | 1992-04-14 | 1993-11-02 | Tokai Chuzosho:Kk | Inoculant for preventing fading of ductile cast iron or the like |
| CN103589943A (en) * | 2013-11-01 | 2014-02-19 | 内蒙古包钢钢联股份有限公司 | Method for treating cast iron by rare earth |
| CN104480377A (en) * | 2014-12-15 | 2015-04-01 | 山东省源通机械股份有限公司 | Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof |
| CN105483508A (en) * | 2014-09-29 | 2016-04-13 | 常州朗锐铸造有限公司 | Alloy vermicular graphite cast iron for railway vehicle brake disc and smelting method of alloy vermicular graphite cast iron |
| CN105755360A (en) * | 2016-05-12 | 2016-07-13 | 河南工程学院 | Preparation technology of vermicular cast iron with high pearlite and stable vermiculation |
-
2016
- 2016-07-15 CN CN201610560757.5A patent/CN105970075B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05285633A (en) * | 1992-04-14 | 1993-11-02 | Tokai Chuzosho:Kk | Inoculant for preventing fading of ductile cast iron or the like |
| CN103589943A (en) * | 2013-11-01 | 2014-02-19 | 内蒙古包钢钢联股份有限公司 | Method for treating cast iron by rare earth |
| CN105483508A (en) * | 2014-09-29 | 2016-04-13 | 常州朗锐铸造有限公司 | Alloy vermicular graphite cast iron for railway vehicle brake disc and smelting method of alloy vermicular graphite cast iron |
| CN104480377A (en) * | 2014-12-15 | 2015-04-01 | 山东省源通机械股份有限公司 | Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof |
| CN105755360A (en) * | 2016-05-12 | 2016-07-13 | 河南工程学院 | Preparation technology of vermicular cast iron with high pearlite and stable vermiculation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982977A (en) * | 2019-12-23 | 2020-04-10 | 山东时风（集团）有限责任公司 | Preparation method of vermicular graphite cast iron automobile exhaust manifold |
| CN110982977B (en) * | 2019-12-23 | 2021-12-07 | 山东时风（集团）有限责任公司 | Preparation method of vermicular graphite cast iron automobile exhaust manifold |
| CN113621750A (en) * | 2020-05-06 | 2021-11-09 | 驻马店中集华骏铸造有限公司 | Method for producing vermicular cast iron |
| CN113621750B (en) * | 2020-05-06 | 2023-06-09 | 驻马店中集华骏铸造有限公司 | Production method of vermicular cast iron |
| WO2024011299A1 (en) * | 2022-07-12 | 2024-01-18 | Tupy S.A. | High mechanical strength and high thermal conductivity vermicular cast iron alloy, high mechanical strength and high thermal conductivity vermicular cast iron alloy manufacturing process, and internal combustion engine part |
| CN115386785A (en) * | 2022-08-22 | 2022-11-25 | 中国第一汽车股份有限公司 | Smelting and pouring process of high-strength gray cast iron cylinder cover casting |
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Address after: No.99, Huicheng Road, Huishan Economic Development Zone, Huishan District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Tianqi Heavy Industry Co.,Ltd. Address before: No.99, Huicheng Road, Huishan Economic Development Zone, Huishan District, Wuxi City, Jiangsu Province Patentee before: JIANGSU FAW FOUNDRY Co.,Ltd. |