CN107587032A - A kind of formula and its method of smelting of high manganese gray cast iron - Google Patents
A kind of formula and its method of smelting of high manganese gray cast iron Download PDFInfo
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- CN107587032A CN107587032A CN201711036693.XA CN201711036693A CN107587032A CN 107587032 A CN107587032 A CN 107587032A CN 201711036693 A CN201711036693 A CN 201711036693A CN 107587032 A CN107587032 A CN 107587032A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of formula and its method of smelting of high manganese gray cast iron, the formula of the high manganese gray cast iron is made up by mass percentage of following ingredients：C：2.9-3.6%, Mn：1.5-3.5%, Si：1.5-2.6%, P：0.1-0.2, S：0.075%~0.05%, Cu：0.8 1.2%, surplus is iron and impurity；The present invention is reasonably adjusted by the raw material ratio to gray cast iron so that strength of gray cast iron and hardness are obviously improved.Technical scheme is reasonable, castings of gray cast iron compression strength, the hardness produced using current material are all obviously improved, reduce enterprise's production cost simultaneously, improve product qualification rate, the advantages of making casting be not likely to produce shrinkage cavity and shrinkage porosite, there is high density and high-wearing feature, improve casting character, expand casting application, remarkable in economical benefits.
Description
Technical field
The present invention relates to casting field, and in particular to a kind of formula and its method of smelting of high manganese gray cast iron.
Background technology
Cast iron is a kind of time-honored traditional structural materials, and especially high manganese gray cast iron is just in research and development
The new material of wear-resisting hydraulic castings.It has lot of advantages compared with other alloy gray cast-irons, so will obtain in production
Popularization and application.At present, conventional gray cast iron manganese content is generally less than 1.2%, and its poor durability, shrinkage factor is big, is also easy to produce shrinkage cavity
And shrinkage porosite, cutting ability is poor, and internal stress is big, and antibiosis grows the defects of poor.
The content of the invention
It is an object of the invention to provide a kind of formula and its method of smelting of high manganese gray cast iron, the high manganese gray cast iron is matched somebody with somebody
Side and its method of smelting overcome the deficiencies in the prior art, have the advantages of tendency such as shrinkage cavity and porosity and deformation is small, casting character
Good, intensity is high, and casting technique is reliable and stable, improves yield rate.
To reach above-mentioned purpose, the technical scheme is that：A kind of formula of high manganese gray cast iron, it is characterised in that：Should
Gray cast iron is made up by mass percentage of following each component：C：2.9-3.6%, Mn：1.5-3.5%, Si：1.5-2.6%,
P：0.1-0.2, S：0.075%~0.05%, Cu：0.8-1.2%, surplus are iron and impurity.
The melting concretely comprises the following steps：
(1) metal charge includes 30-40% ordinary scrap steel；30%-45% foundry return；The 10-20% pig iron；1.5—
2.6% ferrosilicon；1.5-3.5% ferromanganese and 0.8-1.2% copper, metal charge is smelted into molten iron, and detects and adjust
The mass percent of each component in molten iron；
(2) when being heated to 1420~1480 DEG C, after raw material completely liquefaction after, add according to the good C, Mn of stoichiometry,
Si, P, S, Cu, 1520 DEG C are warming up to, stand 10-15 minutes；
(3) pour into a mould：Molten iron casting after inoculation is poured into a mould into casting mold.
In the above-mentioned technical solutions, the invention has the advantages that：First, a kind of high manganese gray cast iron of the invention
The noble metals such as molybdenum, nickel, vanadium are not added in formula and its method of smelting, but casting is improved by microalloying mode with manganese, copper
The intensity and hardness of part, reduce manufacturing cost；Second, high manganese gray cast iron is organized as the thin pearly-lustre of fine flake graphite and emblem
Body, thus it has high density, has good wearability；3rd, casting and processing characteristics are good；Through test of many times result table
Bright, high manganese gray cast iron has the advantages of cubical contraction is small, and casting is not likely to produce shrinkage cavity and shrinkage porosite, in addition, high manganese gray cast iron has
There is the advantages of internal stress is small.
Embodiment
Below the technical scheme in the present invention is carried out clearly, intactly to illustrate, described embodiment is only the present invention's
A part, based on the invention main points in the present invention, those skilled in the art are obtained under the premise of creative work is not made
Every other innovation and creation, belong to the scope of protection of the invention.
Below by embodiment, technical scheme is described in further detail.
Embodiment 1：By gray iron base (P：0.1-0.2%, S：0.075-0.05%) put into heating furnace, be warming up to
1420-1480 DEG C, after raw material completely liquefaction, add 3.0% C, 1.2% Mn, 1.5% Si, 0.8% Cu.Continue
1520 DEG C are warming up to, 10-15 minutes are stood, then the molten iron casting after inoculation will be poured into a mould into casting mold.
Embodiment 2：By gray iron base (P：0.1-0.2%, S：0.075-0.05%) put into heating furnace, be warming up to
1420-1480 DEG C, after raw material completely liquefaction, add 2.9% C, 1.5% Mn, 2.6% Si, 1.0% Cu.Continue
1520 DEG C are warming up to, 10-15 minutes are stood, then the molten iron casting after inoculation will be poured into a mould into casting mold.
Embodiment 3：By gray iron base (P：0.1-0.2%, S：0.075-0.05%) put into heating furnace, be warming up to
1420-1480 DEG C, after raw material completely liquefaction, add 3.6% C, 3.5% Mn, 2.0% Si, 1.2% Cu.Continue
1520 DEG C are warming up to, 10-15 minutes are stood, then the molten iron casting after inoculation will be poured into a mould into casting mold.
Embodiment 4：By gray iron base (P：0.1-0.2%, S：0.075-0.05%) put into heating furnace, be warming up to
1420-1480 DEG C, after raw material completely liquefaction, add 3.2% C, 2.5% Mn, 2.2% Si, 0.95% Cu.After
It is continuous to be warming up to 1520 DEG C, 10-15 minutes are stood, then the molten iron casting after inoculation will be poured into a mould into casting mold.
The noble metals such as molybdenum, nickel, vanadium are not added in the formula and its method of smelting of a kind of high manganese gray cast iron of the present embodiment,
But the intensity of casting and hardness are improved by microalloying mode with manganese, copper, reduce manufacturing cost；The height of the present embodiment
Manganese gray cast iron is organized as fine flake graphite and emblem fine pearlite, thus it has high density, has good wearability；
The casting of the present embodiment and processing characteristics are good；Show through test of many times result, high manganese gray cast iron has that cubical contraction is small, casting
The advantages of being not likely to produce shrinkage cavity and shrinkage porosite, in addition, high manganese gray cast iron have the advantages of internal stress is small.
It is described above, only it is embodiments of the invention, not the present invention is imposed any restrictions, it is every according to the technology of the present invention
Any simple modification, change and the change of equivalent method that essence is made to above example, still fall within the technology of the present invention
In the protection domain of scheme.
Claims (2)
- A kind of 1. formula of high manganese gray cast iron, it is characterised in that：The gray cast iron is made up by mass percentage of following each component：C： 2.9-3.6%, Mn：1.5-3.5%, Si：1.5-2.6%, P：0.1-0.2, S：0.075%~0.05%, Cu：0.8- 1.2%, surplus is iron and impurity.
- A kind of 2. method of smelting of high manganese gray iron casting according to claim 1, it is characterised in that：The melting is specific Step is：(1) metal charge includes 30-40% ordinary scrap steel；30%-45% foundry return；The 10-20% pig iron；1.5—2.6% Ferrosilicon；1.5-3.5% ferromanganese and 0.8-1.2% copper, metal charge is smelted into molten iron, and detects and adjust in molten iron The mass percent of each component；(2) when being heated to 1420~1480 DEG C, after raw material completely liquefaction after, add according to the good C of stoichiometry, Mn, Si, P, S, Cu, 1520 DEG C are warming up to, stand 10-15 minutes；(3) pour into a mould：Molten iron casting after inoculation is poured into a mould into casting mold.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711036693.XA CN107587032A (en) | 2017-10-30 | 2017-10-30 | A kind of formula and its method of smelting of high manganese gray cast iron |
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| CN201711036693.XA CN107587032A (en) | 2017-10-30 | 2017-10-30 | A kind of formula and its method of smelting of high manganese gray cast iron |
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| CN107587032A true CN107587032A (en) | 2018-01-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101778959A (en) * | 2007-06-26 | 2010-07-14 | 国立大学法人岩手大学 | Flake graphite cast iron and manufacture method thereof |
| CN104726759A (en) * | 2013-12-24 | 2015-06-24 | 武汉重型机床集团有限公司 | Production method of as-cast high-strength gray cast iron |
| CN106011360A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Smelting technology of high-strength low-stress gray pig iron |
-
2017
- 2017-10-30 CN CN201711036693.XA patent/CN107587032A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101778959A (en) * | 2007-06-26 | 2010-07-14 | 国立大学法人岩手大学 | Flake graphite cast iron and manufacture method thereof |
| CN104726759A (en) * | 2013-12-24 | 2015-06-24 | 武汉重型机床集团有限公司 | Production method of as-cast high-strength gray cast iron |
| CN106011360A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Smelting technology of high-strength low-stress gray pig iron |
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Application publication date: 20180116 |