CN101792881A - Method for manufacturing cast iron - Google Patents
Method for manufacturing cast iron Download PDFInfo
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- CN101792881A CN101792881A CN 201010126853 CN201010126853A CN101792881A CN 101792881 A CN101792881 A CN 101792881A CN 201010126853 CN201010126853 CN 201010126853 CN 201010126853 A CN201010126853 A CN 201010126853A CN 101792881 A CN101792881 A CN 101792881A
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- cast iron
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Abstract
The invention discloses a method for manufacturing cast iron, which comprises the following step of: inputting a filling material to the periphery of an electrode in a medium-frequency electric furnace, wherein the filling material comprises an iron source mixture and a carbon-containing reducer, and the iron source comprises scrap iron or steel; and the method is characterized in that four elements of Ni, Cr, Mo and Cu are also added in an iron casting process. The alloy is as follows by weight percent: 0.5 to 1 percent of Ni, 0.01 to 0.15 percent of Cr, 0.15 to 0.6 percent of Mo and 0.35 to 0.6 percent of Cu. The invention solves the problem of poorer quality of the cast iron in the prior art and provides the manufacturing method for manufacturing the cast iron with better abrasion resistance, heat resistance, corrosion resistance, low-temperature resistance and non-magnetic performance.
Description
Technical field
The present invention relates to a kind of method of making cast iron, particularly relate to a kind of cast alloy iron manufacture method of having added other auxiliary element.
Background technology
Cast iron is exactly that carbon content is at the iron-carbon more than 2%.The general carbon content of industrial cast iron is 2%～4%.Carbon is many in cast iron to be existed with graphite form, also exists with the cementite form sometimes.Outside the de-carbon, also contain 1%～3% silicon in the cast iron, and element such as manganese, phosphorus, sulphur.Carbon, silicon are the principal elements that influences cast iron microstructure and performance.Cast alloy iron is to add an amount of alloying element (as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminium, boron, vanadium, tin etc.) at plain cast iron to obtain.Cast iron alloy is used to make the cast product that must have high drag to moment of torsion in automobile industry, for example as the bent axle of starting motor-driven vehicle machine part.This class foundry goods usually has very complicated multiaspect shape geometrical shape, and load is in various degree being born on each surface, so different wall thickness is arranged.This just just need produce the more superior cast iron of performance, and general cast iron can not satisfy its use needs.
Summary of the invention
In order to solve the second-rate problem of prior art medium cast iron, the invention provides the cast iron making method that a kind of manufacturing has better wear-resisting, heat-resisting, anti-corrosion, low temperature resistant and nonmagnetic energy.
The technical solution adopted in the present invention is:
A kind of method of making cast iron, comprise the following steps: with filling material be input to electrode in the middle frequency furnace around, above-mentioned filling material package is drawn together source of iron mixture and carbonaceous reductive agent, above-mentioned source of iron comprises scrap iron or steel; It is characterized in that: in the cast iron process, also added Ni, Cr, four kinds of elements of Mo, Cu.
Aforesaid a kind of method of making cast iron, it is characterized in that: wherein the content of the Ni of Tian Jiaing accounts for the 0.5-1% of weight.
Aforesaid a kind of method of making cast iron, it is characterized in that: wherein the content of the Cr of Tian Jiaing accounts for the 0.01-0.15% of weight.
Aforesaid a kind of method of making cast iron, it is characterized in that: wherein the content of the Mo of Tian Jiaing accounts for the 0.15-0.6% of weight.
Aforesaid a kind of method of making cast iron, it is characterized in that: wherein the content of the Cu of Tian Jiaing accounts for the 0.35-0.6% of weight.
The invention has the beneficial effects as follows:
Interpolation Ni element can promote ripple to come the iron miniaturization and increase tensile strength in cast iron, improve the close property of wear resistance, erosion resistance, crushing resistance and oxygen, improve thermal treatment and processibility, prevent that simultaneously thin section casting parts from generating carbide and promptly learning a carbon iron and a whitening, and heavv section foundry goods crystal lattice miniaturization and making is organized more even.During for wall thickness and high-intensity magnesium iron, then to add Ni, the highlyest can guarantee that ripple comes the iron group completely to 10% as the material more than the FCD70.
Add the Cr element and can improve oxidation-resistance in cast iron, and increase hardness and tensile strength, can suppress free ferrite and promote ripple to come iron to form, Cr is an intensive carbide generting element simultaneously.
In cast iron, add the Mo element, Mo is that a kind of strong ripple comes iron stabilizer, it also is a kind of carbide promoter of mild, the Mo of every increase by 0.1% can improve the tensile strength of about 3.5%-4% and the hardness of 4HB, having simultaneously to increase hot strength, the characteristics of stress rupture Creeps Strength and thermal fatigue
Add the Cu element in cast iron, Cu is malleableize the Al-Qaeda terrorist organization, can increase its flowability, improves tensile strength, increases mechanical property, helps to control the chill depth of foundry goods simultaneously, and reaches processing effect.
Embodiment
Below the present invention will be further described:
Embodiment: cast iron (GJs) is made: 3.4% C, 2.2% Si, 0.7%Ni, 0.5% Cu, 0.1%Cr, 0.5% Mo.Microstructure is by 80% perlite, and 20% ferrite is formed.In granularity is under the situation of 6-7, and the form of described graphite is greater than 90% nodularization rate V and VI.
The mechanical property that described foundry goods had is: Rp
0.2=574N/mm
2, Rm=760N/mm
2, and A=2.7%.Modulus of elasticity is 179.5GPa.Hardness on the whole transverse section is 200～270HB10/3000.
Show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. method of making cast iron, comprise the following steps: with the filling material be input to electrode in the middle frequency furnace around, above-mentioned filling material package is drawn together source of iron mixture and carbonaceous reductive agent, above-mentioned source of iron comprises scrap iron or steel; It is characterized in that: in the cast iron process, also added Ni, Cr, four kinds of elements of Mo, Cu.
2. a kind of method of making cast iron according to claim 1, it is characterized in that: wherein the content of the Ni of Tian Jiaing accounts for the 0.5-1% of weight.
3. a kind of method of making cast iron according to claim 2, it is characterized in that: wherein the content of the Cr of Tian Jiaing accounts for the 0.01-0.15% of weight.
4. a kind of method of making cast iron according to claim 3, it is characterized in that: wherein the content of the Mo of Tian Jiaing accounts for the 0.15-0.6% of weight.
5. a kind of method of making cast iron according to claim 4, it is characterized in that: wherein the content of the Cu of Tian Jiaing accounts for the 0.35-0.6% of weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010126853 CN101792881A (en) | 2010-03-18 | 2010-03-18 | Method for manufacturing cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010126853 CN101792881A (en) | 2010-03-18 | 2010-03-18 | Method for manufacturing cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101792881A true CN101792881A (en) | 2010-08-04 |
Family
ID=42585794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010126853 Pending CN101792881A (en) | 2010-03-18 | 2010-03-18 | Method for manufacturing cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101792881A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190441A (en) * | 1996-02-28 | 1998-08-12 | 株式会社理研 | Cast iron and piston ring |
| CN1554793A (en) * | 2003-12-19 | 2004-12-15 | 中国重型汽车集团有限公司 | As-cast state high yield strength nodular cast iron |
| CN1693525A (en) * | 2005-05-17 | 2005-11-09 | 上海大学 | Alloy gray iron material for vehicle covering mould and its preparation method |
-
2010
- 2010-03-18 CN CN 201010126853 patent/CN101792881A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190441A (en) * | 1996-02-28 | 1998-08-12 | 株式会社理研 | Cast iron and piston ring |
| CN1554793A (en) * | 2003-12-19 | 2004-12-15 | 中国重型汽车集团有限公司 | As-cast state high yield strength nodular cast iron |
| CN1693525A (en) * | 2005-05-17 | 2005-11-09 | 上海大学 | Alloy gray iron material for vehicle covering mould and its preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 《内燃机配件》 19941231 范金龙 Cr-Mo-Cu-Ni合金铸铁气缸套热处理工艺 6-11 1-5 , 第2期 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100804 |