CN106282472A - A kind of cast iron molten steel preparation technique - Google Patents

A kind of cast iron molten steel preparation technique Download PDF

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Publication number
CN106282472A
CN106282472A CN201610761439.5A CN201610761439A CN106282472A CN 106282472 A CN106282472 A CN 106282472A CN 201610761439 A CN201610761439 A CN 201610761439A CN 106282472 A CN106282472 A CN 106282472A
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CN
China
Prior art keywords
inovulant
iron
molten iron
molten
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610761439.5A
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Chinese (zh)
Inventor
孙士俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Zhongda Precision Machinery Co Ltd
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Tianjin Zhongda Precision Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin Zhongda Precision Machinery Co Ltd filed Critical Tianjin Zhongda Precision Machinery Co Ltd
Priority to CN201610761439.5A priority Critical patent/CN106282472A/en
Publication of CN106282472A publication Critical patent/CN106282472A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • C21C1/105—Nodularising additive agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The present invention is a kind of cast iron molten steel preparation technique, and the method for employing is as follows: use dam-type magnesium iron bag to carry out spheroidising, add in nodularization bag weight of molten iron 0.3% 0.5% inovulant；Tundish breeds, add in tundish weight of molten iron 0.1% 0.3% inovulant, after inovulant melts completely, molten iron is proceeded to next step；Molten iron in above-mentioned steps is added pouring ladle, and add weight of molten iron 0.05% 0.35% inovulant.The present invention provides a kind of cast iron molten steel preparation technique, by using dam-type magnesium iron bag to carry out spheroidising, effectively prevent inoculation fade phenomenon and spoken parts in traditional operas shortcoming, employing tundish breeds, achieve and the long-acting of molten iron is bred, improve tensile strength so that product is more stable, meet the requirement of some machinery castings needing high rigidity.

Description

A kind of cast iron molten steel preparation technique
Technical field
The present invention relates to a kind of cast iron molten iron production technical field, particularly relate to a kind of cast iron molten steel preparation technique.
Background technology
Molten cast iron adds a small amount of inovulant to improve nucleating condition, make crystallization change by iron-stone ink stability series, with Reaching to prevent spoken parts in traditional operas from promoting graphitization, reduce hardness and improve processing characteristics, uniform formation reduces sectional sensitivity, and crystal grain thinning carries High-mechanical property and improve the processing method of other performance.At present, it is low to there is tensile strength in these products, is easily generated spoken parts in traditional operas etc. Shortcoming, causes product unstable, it is impossible to meet the requirement of the machinery casting of some needs high rigidity, therefore in practice, Molten steel preparation technique still haves much room for improvement.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, and a kind of cast iron molten steel preparation technique is provided.
The present invention for achieving the above object, by the following technical solutions: a kind of cast iron molten steel preparation technique, its feature exists In, the method for employing specifically comprises the following steps that
(1) use dam-type magnesium iron bag to carry out spheroidising, in nodularization bag, add the 0.3%-0.5%'s of weight of molten iron Inovulant；
(2) tundish breeds, and adds the inovulant of the 0.1%-0.3% of weight of molten iron in tundish, treats that inovulant is complete After full thawing, molten iron is proceeded to next step；
(3) molten iron in step (2) is added pouring ladle, and add the inovulant of the 0.05%-0.35% of weight of molten iron.
Particularly, described inovulant percentage by weight composition is as follows: Si:20～40%, Mn:4～6%, Ca:6～ 10%, Ba:1～3%, Al:2～4%, Sr:0.1～2%, surplus are Fe, and its preparation process is as follows: by mass percentage 20～ The Si of 40%, 4～the Mn of 6%, 6～the Ca of 10%, 1～the Ba of 3%, 2～the Al of 4%, 0.1～the Sr of 2% and surplus be Fe Alloy mix homogeneously, and pulverize；Use intermediate frequency furnace melting, in the range of smelting temperature is set in 1480～1500 DEG C, molten The refining time is 10 minutes, cooling, and by adding binding agent, suppressing said mixture in rolling device, to make it mix agglomerating；Will Above-mentioned dough is broken into the granule of a size of 5～10 millimeters of scopes, and screens out the inovulant of different-grain diameter.
Particularly, described binding agent refers to one or more in potassium silicate, calcium silicates, sodium silicate.
The invention has the beneficial effects as follows: the present invention provides a kind of cast iron molten steel preparation technique, by using dam-type ball Ferrum bag carries out spheroidising, effectively prevent inoculation fade phenomenon and spoken parts in traditional operas shortcoming, uses tundish to breed, it is achieved that to molten iron Long-acting breed, improve tensile strength so that product is more stable, meet wanting of some machinery castings needing high rigidity Ask.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
A kind of cast iron molten steel preparation technique, it is characterised in that the method for employing specifically comprises the following steps that
(1) use dam-type magnesium iron bag to carry out spheroidising, in nodularization bag, add 0.3% breed of weight of molten iron Agent, described inovulant percentage by weight composition is as follows: Si:20%, Mn:4%, Ca:6%, Ba:1%, Al:2%, Sr: 0.1%, surplus is Fe, and its preparation process is as follows: the Si of 20% by mass percentage, the Mn of 4%, the Ca of 6%, the Ba of 1%, The Al of 2%, the Sr of 0.1% and the alloy mix homogeneously that surplus is Fe, and pulverize；Use intermediate frequency furnace melting, smelting temperature In the range of being set in 1480 DEG C, smelting time is 10 minutes, cooling, by adding calcium silicates, suppresses above-mentioned in rolling device It is agglomerating that mixture makes it mix；Above-mentioned dough is broken into the granule of a size of 5 millimeters, and screens out 5 millimeters of size Inovulant；
(2) tundish breeds, add in tundish weight of molten iron 0.1% above-mentioned inovulant, treat that inovulant is complete After thawing, molten iron is proceeded to next step；
(3) by step (2) molten iron add pouring ladle, and add weight of molten iron 0.05% inovulant.
Embodiment 2
A kind of cast iron molten steel preparation technique, it is characterised in that the method for employing specifically comprises the following steps that
(1) use dam-type magnesium iron bag to carry out spheroidising, in nodularization bag, add 0.5% breed of weight of molten iron Agent, described inovulant percentage by weight composition is as follows: Si:40%, Mn:6%, Ca:10%, Ba:3%, Al:4%, Sr: 2%, surplus is Fe, and its preparation process is as follows: the Si of 40% by mass percentage, the Mn of 6%, the Ca of 10%, the Ba of 3%, 4% Al, the Sr of 2% and alloy mix homogeneously that surplus is Fe, and pulverize；Using intermediate frequency furnace melting, smelting temperature is set in In the range of 1500 DEG C, smelting time is 10 minutes, cooling, by adding potassium silicate, suppresses said mixture in rolling device It is made to mix agglomerating；Above-mentioned dough is broken into the granule of a size of 10 millimeters, and screens out the pregnant of 10 millimeters of size Educate agent；
(2) tundish breeds, add in tundish weight of molten iron 0.3% above-mentioned inovulant, treat that inovulant is complete After thawing, molten iron is proceeded to next step；
(3) by step (2) molten iron add pouring ladle, and add weight of molten iron 0.35% inovulant.
Above the present invention is exemplarily described, it is clear that the present invention implements and is not subject to the restrictions described above, As long as have employed method design and the various improvement that carry out of technical scheme of the present invention, or the most improved directly apply to other Close, all within protection scope of the present invention.

Claims (3)

1. a cast iron molten steel preparation technique, it is characterised in that the method for employing specifically comprises the following steps that
(1) use dam-type magnesium iron bag to carry out spheroidising, in nodularization bag, add the breeding of 0.3%-0.5% of weight of molten iron Agent；
(2) tundish breeds, and adds the inovulant of the 0.1%-0.3% of weight of molten iron in tundish, treats that inovulant melts completely After change, molten iron is proceeded to next step；
(3) molten iron in step (2) is added pouring ladle, and add the inovulant of the 0.05%-0.35% of weight of molten iron.
A kind of cast iron molten steel preparation technique the most according to claim 1, it is characterised in that described inovulant weight hundred Proportion by subtraction composition as follows: Si:20～40%, Mn:4～6%, Ca:6～10%, Ba:1～3%, Al:2～4%, Sr:0.1～ 2%, surplus is Fe, and its preparation process is as follows: by mass percentage 20～the Si of 40%, 4～the Mn of 6%, 6～the Ca of 10%, 1 ～the Ba of 3%, 2～the Al of 4%, 0.1～the Sr of 2% and alloy mix homogeneously that surplus is Fe, and pulverize；Use Medium frequency induction Stove melting, in the range of smelting temperature is set in 1480～1500 DEG C, smelting time is 10 minutes, cooling, by adding binding agent, Suppressing said mixture in rolling device, to make it mix agglomerating；Above-mentioned dough is broken into a size of 5～10 millimeters scopes Granule, and screen out the inovulant of different-grain diameter.
A kind of cast iron molten steel preparation technique the most according to claim 2, it is characterised in that described binding agent refers to silicon One or more in acid potassium, calcium silicates, sodium silicate.
CN201610761439.5A 2016-08-29 2016-08-29 A kind of cast iron molten steel preparation technique Pending CN106282472A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109972026A (en) * 2019-04-15 2019-07-05 南京浦江合金材料股份有限公司 A kind of preparation process pouring method preparation silicon strontium inoculant using dam-type
CN110273041A (en) * 2018-03-13 2019-09-24 溧阳市联华机械制造有限公司 A kind of cast iron pretreating agent

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1281513A (en) * 1997-12-08 2001-01-24 埃尔凯姆公司 Cast iron inoculant and method for production of cast iron inoculant
CN1615191A (en) * 2002-01-10 2005-05-11 皮奇尼电冶公司 Inoculation filter
CN101921945A (en) * 2010-08-31 2010-12-22 新兴铸管股份有限公司 Liquid iron inoculation process for ductile iron pipes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1281513A (en) * 1997-12-08 2001-01-24 埃尔凯姆公司 Cast iron inoculant and method for production of cast iron inoculant
CN1615191A (en) * 2002-01-10 2005-05-11 皮奇尼电冶公司 Inoculation filter
CN101921945A (en) * 2010-08-31 2010-12-22 新兴铸管股份有限公司 Liquid iron inoculation process for ductile iron pipes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"《有衬炉电渣冶金》" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110273041A (en) * 2018-03-13 2019-09-24 溧阳市联华机械制造有限公司 A kind of cast iron pretreating agent
CN109972026A (en) * 2019-04-15 2019-07-05 南京浦江合金材料股份有限公司 A kind of preparation process pouring method preparation silicon strontium inoculant using dam-type

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Application publication date: 20170104