CN105714181A - Cobalt-containing nodular cast iron and preparing method thereof - Google Patents
Cobalt-containing nodular cast iron and preparing method thereof Download PDFInfo
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- CN105714181A CN105714181A CN201610108815.0A CN201610108815A CN105714181A CN 105714181 A CN105714181 A CN 105714181A CN 201610108815 A CN201610108815 A CN 201610108815A CN 105714181 A CN105714181 A CN 105714181A
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- iron
- cast iron
- nodular cast
- molten iron
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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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- 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
-
- 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
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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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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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
- C22C37/06—Cast-iron alloys containing chromium
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses cobalt-containing nodular cast iron and a preparing method thereof. The cobalt-containing nodular cast iron includes, by weight, 1.4%-2.2% of carbon, 2.3%-3.5% of silicon, 0.1%-1.0% of manganese, 0.08%-0.1% of magnesium, 1.2%-1.5% of cobalt, 0.1%-0.4% of chromium, 0.2%-1.0% of copper, 0.02%-0.03% of cerium, 0.01%-0.04% of phosphorus, 0.01%-0.04% of sulfur and the balance iron and inevitable impurities. Compared with the prior art, the rate of spheroidization of the cobalt-containing nodular cast iron prepared through the preparing method is more than 80%, and the fatigue strength, the bending strength and the elasticity modulus of the cobalt-containing nodular cast iron can be improved to a certain degree; and meanwhile a proper amount of chromium and a proper amount of cerium are added, the components of the nodular cast iron are improved, the form of carbide in the nodular cast iron is obviously improved, and therefore the bending strength, the impact toughness, the flexibility, the area reduction, the percentage elongation after fracture and the yield strength of the nodular cast iron are improved.
Description
Technical field
The present invention relates to cast iron technical field of smelting, specifically a kind of containing cobalt nodular cast iron and preparation method thereof.
Background technology
Spheroidal graphite cast-iron is at a kind of novel casting metal material grown up, at home and abroad obtain a wide range of applications, because magnesium iron has good cast form ability and higher intensity, spheroidal graphite cast-iron is 20th century a kind of high-strength cast iron materials of growing up on the basis of casting pig of the fifties, its combination property is close to steel, oneself is applied to cast on the parts that some stress complexity, intensity, toughness, elastic modelling quantity requirement are higher, has been achieved with ferrum for steel at many industrial circles.
But spheroidal graphite cast-iron on surface without wear-resistant coating time, its wearability be not so good as alloy cast iron.How to promote the optimization of the performances such as the wearability of spheroidal graphite cast-iron itself, thermostability, intensity, plasticity, impact toughness and fatigue strength, the method needing to use the alloyings such as cobalt.
Summary of the invention
It is desirable to provide it is a kind of containing cobalt nodular cast iron and preparation method thereof.
The present invention provides following technical scheme:
A kind of containing cobalt nodular cast iron and preparation method thereof, it is made up of the raw material of following parts by weight: carbon 1.4-2.2%, silicon 2.3-3.5%, manganese 0.1-1.0%, magnesium 0.08-0.1%, cobalt 1.2-1.5%, chromium 0.1-0.4%, copper 0.2-1.0%, cerium 0.02-0.03%, phosphorus 0.01-0.04%, sulfur 0.01-0.04%, and surplus is ferrum and inevitable impurity.
A kind of containing cobalt nodular cast iron and preparation method thereof, comprise the following steps:
(1) raw material melting: weigh containing cobalt spheroidal graphite pig iron raw material, foundry returns, steel scrap by predetermined formulation, it is placed into melting in coreless induction furnace, fusion process ensureing, molten iron temperature is 1480 DEG C-1560 DEG C, detect in molten iron each constituent content after melting and adjust each constituent content until meeting recipe requirements, adding appropriate carborundum and adjust carbon, silicone content in stove, in ladle, iron water amount reaches to tap a blast furnace during required weight to carry out spheroidising；
(2) spheroidising: when molten iron temperature reaches 1530-1560 DEG C, injects nodularization bag by molten iron, has been placed in advance in nodulizer bottom nodularization bag, and nodulizer addition accounts for injects the 0.9-1.2% of molten iron gross mass in nodularization bag, after molten iron is skimmed；
(3) inoculation: molten iron is after nodularization and taking off Slag treatment, the molten iron of nodularization is bred and microalloy treatment, when molten iron temperature is down to 1420-1470 DEG C, addition molten steel quality 0.8-1.0%, granularity are that the Si-Sr inoculant of 15-30 millimeter carries out inoculation；
(4) casting: the molten iron after inoculation pouring into casting mold and obtains ductile cast iron casting, ink iron casting, after sand removal of unpacking processes, carries out destressing process, temperature retention time 8-10h at 250-320 DEG C, and then air cooling is to room temperature, i.e. obtains containing cobalt nodular cast iron.
In described step (2), nodulizer is made up of rare earth magnesium ferrosilicon alloy and 30% nickel magnesium alloy of mass fraction 70%.
Process step of skimming in described step (2) is: adds collection slag agent in ferrum liquid, utilizes slag rake to pull scum silica frost out.
In described step (3) quality is molten steel quality the 0.8% of inovulant.
Compared with the prior art, beneficial effects of the present invention: prepared by the preparation method of the present invention containing cobalt nodular cast iron, Oxygen potential more than 80%, make the fatigue strength containing cobalt nodular cast iron, bending strength, elastic modelling quantity be improved to some extent；It is simultaneously introduced appropriate chromium and cerium, improves the composition of spheroidal graphite cast-iron, make carbide morphology in spheroidal graphite cast-iron obtain and significantly improve, thus improve the bending strength of spheroidal graphite cast-iron, impact toughness, amount of deflection, the contraction percentage of area, elongation after fracture and yield strength.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment 1 one kinds is containing cobalt nodular cast iron and preparation method thereof, it is made up of the raw material of following parts by weight: carbon 1.4%, silicon 2.3%, manganese 0.1%, magnesium 0.08%, cobalt 1.2%, chromium 0.1%, copper 0.2%, cerium 0.02%, phosphorus 0.01%, sulfur 0.01%, and surplus is ferrum and inevitable impurity.
A kind of containing cobalt nodular cast iron and preparation method thereof, comprise the following steps:
(1) raw material melting: weigh containing cobalt spheroidal graphite pig iron raw material, foundry returns, steel scrap by predetermined formulation, it is placed into melting in coreless induction furnace, fusion process ensureing, molten iron temperature is 1480 DEG C-1560 DEG C, detect in molten iron each constituent content after melting and adjust each constituent content until meeting recipe requirements, adding appropriate carborundum and adjust carbon, silicone content in stove, in ladle, iron water amount reaches to tap a blast furnace during required weight to carry out spheroidising；
(2) spheroidising: when molten iron temperature reaches 1530-1560 DEG C, injects nodularization bag by molten iron, has been placed in advance in nodulizer bottom nodularization bag, and nodulizer addition accounts for injects the 0.9-1.2% of molten iron gross mass in nodularization bag, after molten iron is skimmed；
(3) inoculation: molten iron is after nodularization and taking off Slag treatment, the molten iron of nodularization is bred and microalloy treatment, when molten iron temperature is down to 1420-1470 DEG C, addition molten steel quality 0.8-1.0%, granularity are that the Si-Sr inoculant of 15-30 millimeter carries out inoculation；
(4) casting: the molten iron after inoculation pouring into casting mold and obtains ductile cast iron casting, ink iron casting, after sand removal of unpacking processes, carries out destressing process, temperature retention time 8-10h at 250-320 DEG C, and then air cooling is to room temperature, i.e. obtains containing cobalt nodular cast iron.
In described step (2), nodulizer is made up of rare earth magnesium ferrosilicon alloy and 30% nickel magnesium alloy of mass fraction 70%.
Process step of skimming in described step (2) is: adds collection slag agent in ferrum liquid, utilizes slag rake to pull scum silica frost out.
In described step (3) quality is molten steel quality the 0.8% of inovulant.
Embodiment 2 one kinds is containing cobalt nodular cast iron and preparation method thereof, it is made up of the raw material of following parts by weight: carbon 2.2%, silicon 3.5%, manganese 1.0%, magnesium 0.1%, cobalt 1.5%, chromium 0.4%, copper 1.0%, cerium-0.03%, phosphorus 0.04%, sulfur 0.04%, and surplus is ferrum and inevitable impurity.
A kind of containing cobalt nodular cast iron and preparation method thereof, comprise the following steps:
(1) raw material melting: weigh containing cobalt spheroidal graphite pig iron raw material, foundry returns, steel scrap by predetermined formulation, it is placed into melting in coreless induction furnace, fusion process ensureing, molten iron temperature is 1480 DEG C-1560 DEG C, detect in molten iron each constituent content after melting and adjust each constituent content until meeting recipe requirements, adding appropriate carborundum and adjust carbon, silicone content in stove, in ladle, iron water amount reaches to tap a blast furnace during required weight to carry out spheroidising；
(2) spheroidising: when molten iron temperature reaches 1530-1560 DEG C, injects nodularization bag by molten iron, has been placed in advance in nodulizer bottom nodularization bag, and nodulizer addition accounts for injects the 0.9-1.2% of molten iron gross mass in nodularization bag, after molten iron is skimmed；
(3) inoculation: molten iron is after nodularization and taking off Slag treatment, the molten iron of nodularization is bred and microalloy treatment, when molten iron temperature is down to 1420-1470 DEG C, addition molten steel quality 0.8-1.0%, granularity are that the Si-Sr inoculant of 15-30 millimeter carries out inoculation；
(4) casting: the molten iron after inoculation pouring into casting mold and obtains ductile cast iron casting, ink iron casting, after sand removal of unpacking processes, carries out destressing process, temperature retention time 8-10h at 250-320 DEG C, and then air cooling is to room temperature, i.e. obtains containing cobalt nodular cast iron.
In described step (2), nodulizer is made up of rare earth magnesium ferrosilicon alloy and 30% nickel magnesium alloy of mass fraction 70%.
Process step of skimming in described step (2) is: adds collection slag agent in ferrum liquid, utilizes slag rake to pull scum silica frost out.
In described step (3) quality is molten steel quality the 0.8% of inovulant.
Embodiment 3 one kinds is containing cobalt nodular cast iron and preparation method thereof, it is made up of the raw material of following parts by weight: carbon 1.8%, silicon 2.6%, manganese 0.5%, magnesium 0.09%, cobalt 1.4%, chromium 0.3%, copper 0.4%, cerium 0.03%, phosphorus 0.02%, sulfur 0.02%, and surplus is ferrum and inevitable impurity.
A kind of containing cobalt nodular cast iron and preparation method thereof, comprise the following steps:
(1) raw material melting: weigh containing cobalt spheroidal graphite pig iron raw material, foundry returns, steel scrap by predetermined formulation, it is placed into melting in coreless induction furnace, fusion process ensureing, molten iron temperature is 1480 DEG C-1560 DEG C, detect in molten iron each constituent content after melting and adjust each constituent content until meeting recipe requirements, adding appropriate carborundum and adjust carbon, silicone content in stove, in ladle, iron water amount reaches to tap a blast furnace during required weight to carry out spheroidising；
(2) spheroidising: when molten iron temperature reaches 1530-1560 DEG C, injects nodularization bag by molten iron, has been placed in advance in nodulizer bottom nodularization bag, and nodulizer addition accounts for injects the 0.9-1.2% of molten iron gross mass in nodularization bag, after molten iron is skimmed；
(3) inoculation: molten iron is after nodularization and taking off Slag treatment, the molten iron of nodularization is bred and microalloy treatment, when molten iron temperature is down to 1420-1470 DEG C, addition molten steel quality 0.8-1.0%, granularity are that the Si-Sr inoculant of 15-30 millimeter carries out inoculation；
(4) casting: the molten iron after inoculation pouring into casting mold and obtains ductile cast iron casting, ink iron casting, after sand removal of unpacking processes, carries out destressing process, temperature retention time 8-10h at 250-320 DEG C, and then air cooling is to room temperature, i.e. obtains containing cobalt nodular cast iron.
In described step (2), nodulizer is made up of rare earth magnesium ferrosilicon alloy and 30% nickel magnesium alloy of mass fraction 70%.
Process step of skimming in described step (2) is: adds collection slag agent in ferrum liquid, utilizes slag rake to pull scum silica frost out.
In described step (3) quality is molten steel quality the 0.8% of inovulant.
It is obvious to a person skilled in the art that the invention is not restricted to the details of described one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described explanation, it is intended that all changes fallen in the implication of equivalency and scope of claim included in the present invention.In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (5)
1. one kind contains cobalt nodular cast iron and preparation method thereof, it is characterized in that, it is made up of the raw material of following parts by weight: carbon 1.4-2.2%, silicon 2.3-3.5%, manganese 0.1-1.0%, magnesium 0.08-0.1%, cobalt 1.2-1.5%, chromium 0.1-0.4%, copper 0.2-1.0%, cerium 0.02-0.03%, phosphorus 0.01-0.04%, sulfur 0.01-0.04%, and surplus is ferrum and inevitable impurity.
One the most according to claim 1 is containing cobalt nodular cast iron and preparation method thereof, it is characterised in that comprise the following steps:
(1) raw material melting: weigh containing cobalt spheroidal graphite pig iron raw material, foundry returns, steel scrap by predetermined formulation, it is placed into melting in coreless induction furnace, fusion process ensureing, molten iron temperature is 1480 DEG C-1560 DEG C, detect in molten iron each constituent content after melting and adjust each constituent content until meeting recipe requirements, adding appropriate carborundum and adjust carbon, silicone content in stove, in ladle, iron water amount reaches to tap a blast furnace during required weight to carry out spheroidising；
(2) spheroidising: when molten iron temperature reaches 1530-1560 DEG C, injects nodularization bag by molten iron, has been placed in advance in nodulizer bottom nodularization bag, and nodulizer addition accounts for injects the 0.9-1.2% of molten iron gross mass in nodularization bag, after molten iron is skimmed；
(3) inoculation: molten iron is after nodularization and taking off Slag treatment, the molten iron of nodularization is bred and microalloy treatment, when molten iron temperature is down to 1420-1470 DEG C, addition molten steel quality 0.8-1.0%, granularity are that the Si-Sr inoculant of 15-30 millimeter carries out inoculation；
(4) casting: the molten iron after inoculation pouring into casting mold and obtains ductile cast iron casting, ink iron casting, after sand removal of unpacking processes, carries out destressing process, temperature retention time 8-10h at 250-320 DEG C, and then air cooling is to room temperature, i.e. obtains containing cobalt nodular cast iron.
One the most according to claim 1 and 2 is containing cobalt nodular cast iron and preparation method thereof, it is characterised in that: in described step (2), nodulizer is made up of rare earth magnesium ferrosilicon alloy and 30% nickel magnesium alloy of mass fraction 70%.
One the most according to claim 1 and 2 is containing cobalt nodular cast iron and preparation method thereof, it is characterised in that: process step of skimming in described step (2) is: adds collection slag agent in ferrum liquid, utilizes slag rake to pull scum silica frost out.
One the most according to claim 1 and 2 is containing cobalt nodular cast iron and preparation method thereof, it is characterised in that: in described step (3) quality is molten steel quality the 0.8% of inovulant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108815.0A CN105714181A (en) | 2016-02-26 | 2016-02-26 | Cobalt-containing nodular cast iron and preparing method thereof |
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| CN201610108815.0A CN105714181A (en) | 2016-02-26 | 2016-02-26 | Cobalt-containing nodular cast iron and preparing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1808504A1 (en) * | 2006-01-16 | 2007-07-18 | Siemens Aktiengesellschaft | Cast iron containing cobalt for use in steam turbines |
| CN102177267A (en) * | 2008-10-09 | 2011-09-07 | 西门子公司 | Ductile iron having cobalt |
| CN103556041A (en) * | 2013-10-30 | 2014-02-05 | 青岛良力精铸有限公司 | Preparation method of niobium-containing rich silicon nodular graphite cast iron |
-
2016
- 2016-02-26 CN CN201610108815.0A patent/CN105714181A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1808504A1 (en) * | 2006-01-16 | 2007-07-18 | Siemens Aktiengesellschaft | Cast iron containing cobalt for use in steam turbines |
| CN102177267A (en) * | 2008-10-09 | 2011-09-07 | 西门子公司 | Ductile iron having cobalt |
| CN103556041A (en) * | 2013-10-30 | 2014-02-05 | 青岛良力精铸有限公司 | Preparation method of niobium-containing rich silicon nodular graphite cast iron |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
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Application publication date: 20160629 |