CN103194665A - Eutectic graphite grey cast iron continous-cast section material and manufacturing method thereof - Google Patents
Eutectic graphite grey cast iron continous-cast section material and manufacturing method thereof Download PDFInfo
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- CN103194665A CN103194665A CN2013101302004A CN201310130200A CN103194665A CN 103194665 A CN103194665 A CN 103194665A CN 2013101302004 A CN2013101302004 A CN 2013101302004A CN 201310130200 A CN201310130200 A CN 201310130200A CN 103194665 A CN103194665 A CN 103194665A
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Abstract
The invention discloses a cast iron continuous-cast section material and a manufacturing method thereof, in particular relates to an eutectic graphite grey cast iron continuous-cast section material and the manufacturing method thereof, and belongs to the field of the casting technique. The eutectic graphite grey cast iron continuous-cast section material is prepared from the following raw materials by mass percent: 3.40% to 3.60% of C, 2.4% to 2.9% of Si, 0.6% to 1.0% of Mn, 0.08% to 0.15% of P, less than or equal to 0.07% of S, 0.06% to 0.20% of Ti, 0.3% to 0.80% of Cu and 91.5% to 93% of Fe, wherein the total amount of the raw materials accounts for 100%. The prepared section material is excellent in surface roughness and free of generating shrinkage holes, shrinkage porosity and air holes. The structures, from the center to the edge, of the section material, are uniform and dense. The section material has the characteristics of being high in strength and uniform in hardness. The tensile strength and the uniformity of the section hardness of the material section disclosed by the invention are improved greatly.
Description
Technical field
The present invention relates to a kind of continuous casting section bar for iron casting and manufacture method thereof, particularly relate to a kind of eutectic graphite graphitic cast iron continuous casting section bar and manufacture method thereof, belong to casting technology field.
Background technology
The cast iron horizontal continuous caster technology of China is started late, and since the development of cast iron profile material horizontal casting, producing the common grey iron section bar is exactly to add an amount of nucleating agent in low carbon equivalent composition molten iron.Simple improve mechanical property and be difficult to by reducing carbon equivalent, and C, Si content reduces is limited, cross to hang down and cementite to occur and form numb spoken parts in an opera mouth tissue.If C, Si too high levels influence strength property again, graphite structure is thick.Existing cast iron horizontal continuous caster method production efficiency is low, the as-drawn instability.Existing graphitic cast iron continuous casting section bar tensile strength is lower, and the homogeneity of section hardness has much room for improvement.
Summary of the invention
The present invention is exactly in order to solve the problems of the technologies described above, and a kind of eutectic graphite graphitic cast iron continuous casting section bar and the manufacture method thereof that provide, purpose is to improve the tensile strength of dag continuous casting section bar for iron casting and the homogeneity of section hardness.
In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions: eutectic graphite graphitic cast iron continuous casting section bar, it is to be prepared from by described mass percent by following raw material: C:3.40%-3.60%, Si:2.4%-2.9%, Mn:0.6%-1.0%, P:0.08%-0.15%, S :≤0.07%, Ti:0.06%-0.20%, Cu:0.3-0.80%, Fe:91.5%-93%, each raw material total amount is 100%.
Above-mentioned eutectic graphite graphitic cast iron continuous casting section bar, it is to be prepared from by described best in quality per-cent by following raw material: C:3.50%, Si:2.60%, Mn:0.70%, P:0.12%, S:0.04%, Ti:0.15%, Cu:0.7%, Fe:92.19%.
The manufacture method of above-mentioned eutectic graphite graphitic cast iron continuous casting section bar, it is realized by following steps:
Melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and adjusts, 1440 ℃-1460 ℃ of cupola furnace tapping temperatures, the method that pours in the hot metal ladle breeds, use common 75% ferrosilicon nucleating agent, the granularity 0.2-12mm of nucleating agent, innoculant adding quantity is the 0.6-1.0% of molten steel quality, breeds between the back molten iron carbon equivalent control 4.2-4.4;
Molten iron spectral analysis: determine C, Si, Mn, P, S, Cu and Ti content, according to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted the content of carbon equivalent and C, Si, Mn, P, S, Cu and Ti;
Carry out the continuous casting section bar drawing process, through holding furnace, the water-cooled graphite crystallizer manufactures continuous casting section bar.
Owing to adopt technique scheme, make the present invention have following advantage and effect: Ti can form carbide and carbon nitrogen avidity is extremely strong in the raw material of the present invention, its carbide, and nitride often exists in the cast iron with fine particle, can improve wear resistance.And the reinforced ferrite effect is arranged.The compound of most of titanium exists in the metallic matrix behind the graphitic cast iron adding Ti, for satisfying graphite form, tensile strength and good cutting, determines titanium addition in the graphitic cast iron.Cu can promote eutectic stage greying, and refinement also increases perlite.
Section bar of the present invention is slightly made and is outside one's consideration except having good surface, also has no shrinkage cavity, shrinkage porosite, pore.To the edge tissues even compact, section bar has high strength, the uniform characteristics of hardness by the center.The oil resistant air infiltration that the present invention has improved material leaks ability, and voltage endurance capability increases substantially.The gun drilling processing that the while even compact is organized as component of machine has guaranteed working accuracy.Can be production high-quality gray cast iron sectional material blank material is provided.The homogeneity of the tensile strength of section bar of the present invention and section hardness all is greatly improved.
Embodiment
The present invention is described further below in conjunction with embodiment.Following examples only are several specific embodiment of the present invention, but design concept of the present invention is not limited thereto, and allly utilize this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Embodiment 1
The preparation technology of section bar of the present invention is as follows:
Melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and in time adjusts, the cupola furnace tapping temperature is to pour method in 1440 ℃ of hot metal ladle to breed, use common 75% ferrosilicon nucleating agent, the granularity 0.5mm of nucleating agent, innoculant adding quantity is 0.6% of molten steel quality, breeds back molten iron carbon equivalent control 4.32; Molten iron spectral analysis: determine C, Si, Mn, P, S, Ti content, according to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted carbon equivalent and C, Si, Mn, P, S, Ti, appropriate amount, each raw material consumption sees Table 3.
Carry out the continuous casting section bar drawing process, manufacture continuous casting section bar through holding furnace, water-cooled graphite crystallizer, concrete drawing process parameter sees Table 1 and table 2.
Table 1: section bar drawing parameter process table
Table 2: section bar drawing parameter (HT250 section bar specification Φ 90)
Table 3 detects data sheet for raw material consumption, performance, the metallographic of the section bar that employing present embodiment technology, raw material consumption are made:
Embodiment 2
The preparation technology of section bar of the present invention is as follows:
Melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and in time adjusts, the cupola furnace tapping temperature is 1460 ℃, the method that pours in the hot metal ladle breeds, use common 75% ferrosilicon nucleating agent, the granularity 12mm of nucleating agent, innoculant adding quantity is 1.0% of molten steel quality, breeds back molten iron carbon equivalent control 4.38;
Molten iron spectral analysis: determine C, Si, Mn, P, S, Ti content,
According to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted carbon equivalent and C, Si, and Mn, P, S, Ti, appropriate amount, each raw material consumption sees Table 4.
Carry out the continuous casting section bar drawing process, manufacture continuous casting section bar through holding furnace, water-cooled graphite crystallizer, the drawing parameter is identical with embodiment 1.
Table 4 detects data sheet for raw material consumption, performance, the metallographic of the section bar that employing present embodiment technology, raw material consumption are made:
Table 4
Embodiment 3
The preparation technology of section bar of the present invention is as follows:
Melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and in time adjusts, the cupola furnace tapping temperature is 1445 ℃, the method that pours in the hot metal ladle breeds, use common 75% ferrosilicon nucleating agent, the granularity 0.5mm of nucleating agent, innoculant adding quantity is 0.7% of molten steel quality, breeds back molten iron carbon equivalent control 4.20;
Molten iron spectral analysis: determine C, Si, Mn, P, S, Ti content,
According to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted carbon equivalent and C, Si, and Mn, P, S, Ti, appropriate amount, each raw material consumption sees Table 5.
Carry out the continuous casting section bar drawing process, manufacture continuous casting section bar through holding furnace, water-cooled graphite crystallizer, the drawing parameter is identical with embodiment 1.
Table 5 detects data sheet for raw material consumption, performance, the metallographic of the section bar that employing present embodiment technology, raw material consumption are made:
Table 5
Embodiment 4
The preparation technology of section bar of the present invention is as follows:
Melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and in time adjusts, the cupola furnace tapping temperature is 1450 ℃, the method that pours in the hot metal ladle breeds, use common 75% ferrosilicon nucleating agent, the granularity 6mm of nucleating agent, innoculant adding quantity is 0.8% of molten steel quality, breeds back molten iron carbon equivalent control 4.26;
Molten iron spectral analysis: determine C, Si, Mn, P, S, Ti content,
According to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted carbon equivalent and C, Si, and Mn, P, S, Ti, appropriate amount, each raw material consumption sees Table 6.
Carry out the continuous casting section bar drawing process, manufacture continuous casting section bar through holding furnace, water-cooled graphite crystallizer, the drawing parameter is identical with embodiment 1.
Table 6 detects data sheet for raw material consumption, performance, the metallographic of the section bar that employing present embodiment technology, raw material consumption are made:
Table 6
Claims (3)
1. eutectic graphite graphitic cast iron continuous casting section bar, it is to be prepared from by described mass percent by following raw material: C:3.40%-3.60%, Si:2.4%-2.9%, Mn:0.6%-1.0%, P:0.08%-0.15%, S :≤0.07%, Ti:0.06%-0.20%, Cu:0.3-0.80%, Fe:91.5%-93%, each raw material total amount is 100%.
2. eutectic graphite graphitic cast iron continuous casting section bar according to claim 1, it is to be prepared from by described best in quality per-cent by following raw material: C:3.50%, Si:2.60%, Mn:0.70%, P:0.12%, S:0.04%, Ti:0.15%, Cu:0.7%, Fe:92.19%.
3. the manufacture method of the described eutectic graphite graphitic cast iron of claim 1 continuous casting section bar, it is characterized in that it realizes by following steps: melting technology: adopt line frequency induction furnace and cupola furnace double melting, base iron adopts stokehold Rapid Thermal analyser and spectrum control content and adjusts, the cupola furnace tapping temperature is 1440 ℃-1460 ℃, the method that pours in the hot metal ladle breeds, use common 75% ferrosilicon nucleating agent, the granularity of nucleating agent is 0.2-12mm, innoculant adding quantity is the 0.6-1.0% of molten steel quality, breeds between the back molten iron carbon equivalent control 4.2-4.4; Molten iron spectral analysis: determine C, Si, Mn, P, S, Cu and Ti content, according to section and the use properties requirement of section bar, comprehensive section bar mechanical property and matrix are adjusted the content of carbon equivalent and C, Si, Mn, P, S, Cu and Ti, meet described ratio; Carry out the continuous casting section bar drawing process, through holding furnace, the water-cooled graphite crystallizer manufactures continuous casting section bar.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343278A (en) * | 2013-07-17 | 2013-10-09 | 日月重工股份有限公司 | Method for producing gray cast iron for machine |
| CN105369121A (en) * | 2015-11-25 | 2016-03-02 | 中原内配集团股份有限公司 | Gray pig iron air cylinder sleeve and gas nitriding production process thereof |
| CN105369115A (en) * | 2015-11-25 | 2016-03-02 | 中原内配集团股份有限公司 | Nitralloy cast iron air cylinder sleeve and preparing method thereof |
| CN106119681A (en) * | 2016-08-10 | 2016-11-16 | 苏州东海玻璃模具有限公司 | A kind of glass mold cylinder iron material |
| CN108642367A (en) * | 2018-05-30 | 2018-10-12 | 成都先进金属材料产业技术研究院有限公司 | The method that In-situ reaction produces anticorrosive gray cast iron |
| CN115323258A (en) * | 2022-08-23 | 2022-11-11 | 一汽解放汽车有限公司 | Gray cast iron and preparation method and application thereof |
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| CN1088997A (en) * | 1992-12-30 | 1994-07-06 | 华东工学院 | The thermal treatment process of low-alloy spheroidal graphite cast-iron and foundry goods thereof |
| CN1876878A (en) * | 2005-06-10 | 2006-12-13 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
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2013
- 2013-04-16 CN CN201310130200.4A patent/CN103194665B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088997A (en) * | 1992-12-30 | 1994-07-06 | 华东工学院 | The thermal treatment process of low-alloy spheroidal graphite cast-iron and foundry goods thereof |
| CN1876878A (en) * | 2005-06-10 | 2006-12-13 | 上海上大热欣科技发展有限公司 | CrMoCu alloy cast iron continuous casting section bar and manufacturing method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343278A (en) * | 2013-07-17 | 2013-10-09 | 日月重工股份有限公司 | Method for producing gray cast iron for machine |
| CN103343278B (en) * | 2013-07-17 | 2015-08-26 | 日月重工股份有限公司 | The production method of gray cast iron for machine |
| CN105369121A (en) * | 2015-11-25 | 2016-03-02 | 中原内配集团股份有限公司 | Gray pig iron air cylinder sleeve and gas nitriding production process thereof |
| CN105369115A (en) * | 2015-11-25 | 2016-03-02 | 中原内配集团股份有限公司 | Nitralloy cast iron air cylinder sleeve and preparing method thereof |
| CN105369121B (en) * | 2015-11-25 | 2017-03-22 | 中原内配集团股份有限公司 | Gray pig iron air cylinder sleeve and gas nitriding production process thereof |
| CN106119681A (en) * | 2016-08-10 | 2016-11-16 | 苏州东海玻璃模具有限公司 | A kind of glass mold cylinder iron material |
| CN106119681B (en) * | 2016-08-10 | 2018-11-16 | 苏州东海玻璃模具有限公司 | A kind of glass mold cylinder iron material |
| CN108642367A (en) * | 2018-05-30 | 2018-10-12 | 成都先进金属材料产业技术研究院有限公司 | The method that In-situ reaction produces anticorrosive gray cast iron |
| CN115323258A (en) * | 2022-08-23 | 2022-11-11 | 一汽解放汽车有限公司 | Gray cast iron and preparation method and application thereof |
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