CN101463446B - Low-alloy white cast iron - Google Patents
Low-alloy white cast iron Download PDFInfo
- Publication number
- CN101463446B CN101463446B CN2008102432697A CN200810243269A CN101463446B CN 101463446 B CN101463446 B CN 101463446B CN 2008102432697 A CN2008102432697 A CN 2008102432697A CN 200810243269 A CN200810243269 A CN 200810243269A CN 101463446 B CN101463446 B CN 101463446B
- Authority
- CN
- China
- Prior art keywords
- cast iron
- low
- iron
- chilled cast
- alloy
- 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.)
- Active
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 33
- 239000000956 alloy Substances 0.000 title claims abstract description 33
- 229910001037 White iron Inorganic materials 0.000 title abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 235000013339 cereals Nutrition 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- 239000011651 chromium Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 35
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 229910000805 Pig iron Inorganic materials 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 13
- 150000002910 rare earth metals Chemical class 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 5
- 229910052788 barium Inorganic materials 0.000 claims description 5
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- 239000010451 perlite Substances 0.000 description 7
- 235000019362 perlite Nutrition 0.000 description 7
- 229910001349 ledeburite Inorganic materials 0.000 description 6
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 241000227425 Pieris rapae crucivora Species 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- QDLZHJXUBZCCAD-UHFFFAOYSA-N [Cr].[Mn] Chemical compound [Cr].[Mn] QDLZHJXUBZCCAD-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a low alloy white cast iron, which can meet the special requirements of wearing pieces of cereals processing machines. The cast iron comprises the following chemical compositions according to the weight percentage: 3.5-3.8% of carbon, 1.5-1.9% of silicon, more than 0 and less than or equal to 1.0% of Mn, less than 0.05% of phosphorus, 0.02% of sulfur, more than 0 and less than or equal to 1.0% of chromium; the rest is Fe and unavoidable trace impurity elements. The white cast iron is in line with the performance provision of the wearing pieces of the cereals processing machines and has better mechanical work and casting combination property compared with the high hardness wear-resistant white cast iron (Patent CN1019029B). The white cast iron has the advantages of easy controllable components, little alloy, low production cost and fine foundry processing property, thus better in favor of industrialization application, etc.
Description
Technical field
The present invention relates to a kind of low-alloy chilled cast iron, specifically a kind of low-alloy chilled cast iron that can satisfy the requirement of Cereals Processing Machines wear parts.
Background technology
The cast iron of using for the opposing abrasive wear generally uses under the spoken parts in traditional operas state, and it is organized as strong metallic matrix and is supporting hard carbide, makes cast iron can resist wearing and tearing.According to working conditions, white cast iron can not contain alloy, also can contain basic, normal, high amount alloying element.China has worked out the national standard (GB8263-87) of 2 wear-resistant white cast.Wherein the material composition of standard brand is generally as shown in table 1.
The material composition of table 1 standard brand (weight percent) (surplus is an iron)
Hardness is generally HRc53～58, and the high hardness alloy spoken parts in traditional operas antifriction cast iron composition of patent CN1019029B is: carbon 3～4%, silicon 0.4～1.0%, manganese 0.5～2.0%, phosphorus 0.1～0.15%, sulphur 0.1～0.2%, chromium 0.3～1.0%, boron 0.05～0.2%, R.E0.04～0.06, surplus are iron; Unit is a weight percentage.Its hardness HRc55～68.
For Cereals Processing Machines, it is hardness HRc40～55 to the requirement of white pig iron, and the shape more complicated of foundry goods generally.And use current material production, and the difficult buying of low silicon iron, the too high difficult processing of hardness does not meet technical requirements, and the casting crack tendency that current material is produced is big, unsuitable scale operation.
Summary of the invention
The purpose of this invention is to provide a kind of low-alloy chilled cast iron, this white pig iron meets the requirement of Cereals Processing Machines, has than standard brand white pig iron or the better mechanical workout of CN1019029B white pig iron, casts over-all properties.This white pig iron can be used for the Cereals Processing Machines parts, also can be used for the Other Engineering field.
According to technical scheme provided by the invention, the chemical ingredients of described white pig iron is: carbon 3.5～3.8%, silicon 1.5～1.9%, manganese is greater than 0, smaller or equal to 1.0%, phosphorus is less than 0.05%, sulphur is less than 0.02%, and chromium is greater than 0, smaller or equal to 1.0%, and surplus is iron and inevitable micro impurity element; Unit is a weight percentage.
The fracture of described white pig iron is white in color, hardness HRc40～55.
When the described low-alloy chilled cast iron of melting, smelting furnace adopts medium-frequency induction furnace or cupola furnace, and the adding mode of nodulizing agent is for pouring method in the bag; During melting, be provided for placing the nodularization hole of nodulizing agent in hot metal ladle, put into 1.5～2.0% nodulizing agent of low-alloy chilled cast iron melting amount in the nodularization hole, unit is a weight percentage; Cover insulating covering agent on nodulizing agent, increased pressure board on insulating covering agent again, the smelting temperature of low-alloy chilled cast iron are 70 ℃ in 1520 soil, and the teeming temperature of low-alloy chilled cast iron molten iron is 1400 ± 50 ℃;
The final chemical ingredients of described low-alloy chilled cast iron is: carbon 3.5～3.8%, and silicon 1.5～1.9%, manganese are greater than 0, smaller or equal to 1.0%, phosphorus is less than 0.05%, sulphur is less than 0.02%, and chromium is greater than 0, smaller or equal to 1.0%, and surplus is iron and inevitable micro impurity element; Unit is a weight percentage.According to the ultimate constituent requirement of low-alloy chilled cast iron, the composition of described insulating covering agent, pressing plate calculates in furnace charge.
The add-on of described nodulizing agent is preferably 1.6～1.8% of melting amount.
Described low-alloy chilled cast iron can be applied to the Cereals Processing Machines parts.As feed rolls and agitating roller etc.
The ordinary white cast iron of standard brand and the production technique of low-alloy chilled cast iron and graphitic cast iron are similar, and the melting technology of low-alloy chilled cast iron of the present invention is similar with production spheroidal graphite cast iron, nodulizing agent is common magnesium-rare earth, main component is: calcium 1.0～2.0%, silicon 40～45%, magnesium 6.0～8.0%, rare earth 2.5～3.5% and barium 1.0～2.0%, and all the other are iron; Reasonable a kind of nodulizing agent composition is: calcium 1.08%, silicon 44.57%, magnesium 7.95%, rare earth 3.22% and barium 1.54%, all the other are iron.The composition of described insulating covering agent is common 75# ferrosilicon.
Carbon in the described low-alloy chilled cast iron, silicon are the basal component of cast iron; Manganese, chromium promote perlite to form, and refine pearlite, strengthen matrix.In this white pig iron, there is part to form carbide.
Silicon is than common white pig iron height among the present invention, and main purpose is to guarantee to reduce hardness under the wear-resistant prerequisite as far as possible, reduces shrinkage porosite, shrinkage cavity, and reduction crackle tendency makes described machining of cast iron performance and castability better.Along with silicone content increases, carbon equivalent improves, and crystallization range is narrower, more approaches successively to solidify so solidify, and the shrinkage cavity shrinkage porosity tendency is little, and hot cracking tendency is little.Along with the raising of silicone content, help reducing hardness, thereby the machining of cast iron performance is improved simultaneously.It is also not all right that but hardness is too low, therefore, adds an amount of manganese, chromium again, to guarantee to reach certain rigidity.
The purpose that adds nodulizing agent mainly is to utilize processings of go bad of rare earth in the nodulizing agent, further to make the matrix refinement of foundry goods, can further improve the hardness of foundry goods, and the while has also strengthened the good stability of pouring technology, the raising finished casting rate.Adding nodulizing agent is to handle for rotten, mainly is can form a plurality of nucleation sites when molten steel solidification, makes and organizes more evenly refinement, improve the hardness of foundry goods, and technology is very stable; If do not add nodulizing agent, only depend on the adjustment of silicon and manganese chromium, not very reliable, perhaps be good sometimes, perhaps be extreme difference sometimes, technology is not too stable.Metallographic structure after the processing is perlite and ledeburite, and fracture is white in color.Foundry goods after the formation is without thermal treatment.The present invention is by adding the nodulizing agent that the contains rare earth processing of going bad, nodulizing agent is a kind of material commonly used in the Foundry Production on the one hand, be easy to buying, and cost is low, on the other hand, because nodulizing agent can be placed on the bottom of hot metal ladle, when molten iron is poured into, metamorphic reaction takes place rapidly behind the molten iron contact nodulizing agent, rotten very even, melting technology workable, operator's ratio are easier to grasp and implement.
By adjusting the content of silicon, control suitable carbon equivalent, reduce body and shrink; Add an amount of manganese, chromium simultaneously and handle, to guarantee to reach desired hardness by the rare earth in the nodulizing agent is rotten.
It is too high to the invention solves general white cast iron hardness, the crackle tendency is big, the difficult point that is difficult for processing, the white cast iron hardness value that the present invention makes is between HRc40～55, hardness is moderate, the mechanical workout of being more convenient for, and hot cracking tendency is little, be convenient to make complex-shaped foundry goods, can satisfy wear-resisting requirement again simultaneously.Because adopt the melting technology of magnesium iron, during actual production, various compositions are adding fashionable relatively good adjustment, also easier control is and if adopt the technology of common white pig iron (graphitic cast iron), then various compositions to add or add just to be difficult to the control THE STRUCTURE OF CASTINGS and to change after a little while.This material castability that adopts the present invention to obtain is improved greatly, and the crackle tendency is little, is easy to make the complicated foundry goods of shape, and hardness is moderate simultaneously, and machining property is better.This low-alloy chilled cast iron can be used for making the Cereals Processing Machines parts, and described Cereals Processing Machines parts mainly are feed rolls, agitating roller etc.
Therefore, the present invention is with respect to CN1019029B white pig iron, and hardness is between HRc40～55, hardness is moderate, processing easily, wear-resisting adhering to specification, crackle tendency is little, the feed rolls of making of this white cast iron continuous operation 1 year on rice milling machine, meter mass conservation of processing.
Description of drawings
The matrix of Fig. 1 is perlite+about 45% ledeburite.
The matrix of Fig. 2 is perlite+about 50% ledeburite.
The matrix of Fig. 3 is perlite+about 55% ledeburite.
The matrix of Fig. 4 is perlite+about 50% ledeburite.
Embodiment
The composition such as the table 1 of the material of standard brand, the composition such as the table 2 of CN1019029B white pig iron.
The composition (weight percent) of table 2 CN1019029B white pig iron (surplus is an iron)
| C | Si | Mn | P | S | Cr | B | R.E |
| 3～4 | 0.4～1.0 | 0.5～2 | 0.1～0.15 | 0.1～0.2 | 0.3～1 | 0.05～0.2 | 0.04～0.06 |
Among the present invention, it is as shown in table 3 to be used for casting the lost chemical ingredients of the low-alloy spoken parts in traditional operas casting of Cereals Processing Machines parts.
The chemical ingredients of table 3 low-alloy cast iron of the present invention (weight percent) (surplus is an iron)
| C | Si | Mn | P | S | Cr |
| 3.5～3.8 | 1.5～1.9 | 0～1.0 | ＜0.05 | ＜0.02 | 0～1.0 |
The melting technology of material of the present invention is similar with the technology of the production spheroidal graphite cast iron of routine, and detail can " be cast the production technique about spheroidal graphite cast iron in the handbook book of reference such as (the 1st volumes) with reference to what China Machine Press published in 1993.Used nodulizing agent is common magnesium-rare earth, and main component is: calcium 1.08%, silicon 44.57%, magnesium 7.95%, rare earth 3.22% and barium 1.54%, all the other are iron.Can certainly adopt other nodulizing agent that contains rare earth, as the OGRC-6B type nodulizing agent of the peaceful slope iron alloy in Nanjing company limited production.The add-on of nodulizing agent is 1.5%～2.0% of a melting amount.Smelting temperature is 1520 ± 70 ℃, and teeming temperature is 1400 ± 50 ℃.The add-on of nodulizing agent is preferably 1.6%～1.8% of melting amount.
Several compositions of material of the present invention divide and hardness example such as table 4, and typical metallographic structure such as Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are corresponding with aforementioned 4 embodiment respectively.Among the figure white be ledeburite, black be perlite.
Table 4 chemical ingredients (weight percent) (surplus is an iron) and hardness (HRc)
Mentioned component and performance meet Cereals Processing Machines parts relevant regulations fully, and have better mechanical workout, casting over-all properties.
Compare with common white pig iron and CN1019029B white pig iron, it is few that the present invention adds alloying element, need not add boron, and phosphorus, sulphur composition range are wide, control easily in the production, and the casting crack of producing tendency is little, is easy to make the complicated foundry goods of shape.
Material of the present invention can be used to cast the Cereals Processing Machines parts, as feed rolls, agitating roller etc.
Lift the method for a this low-alloy white cast iron of melting below,, may further comprise the steps with 500 kilograms of molten iron of 500 kilograms of medium-frequency induction furnace meltings:
(1) composition according to the low-alloy white cast iron requires batching (covering ferrosilicon, cover plate calculate in furnace charge), melting molten iron in medium-frequency induction furnace;
(2) in the nodularization of hot metal ladle hole, put into 1.7% of melting amount, i.e. 8.5 kilograms common magnesium-rare earth nodulizing agent, main component is: calcium 1.08%, silicon 44.57%, magnesium 7.95%, rare earth 3.22% and barium 1.54%, all the other are iron; Cover the 75# ferrosilicon, cover the thick general carbon steel steel plate of about 10 millimeter again.
When (3) smelting temperature reaches 1520 ℃, go out the molten iron of about 2/3 volume earlier, wait reaction after about 1 minute, pour the surplus molten iron again.
(4) at about 1400 ℃ of left and right sides pouring cast parts.
Described pressing plate is the plain carbon stool steel plate.
Claims (6)
1. a low-alloy chilled cast iron is characterized in that, during melting, smelting furnace adopts medium-frequency induction furnace or cupola furnace, and the adding mode of nodulizing agent is for pouring method in the bag; During melting, be provided for placing the nodularization hole of nodulizing agent in hot metal ladle, put into 1.5～2.0% nodulizing agent of low-alloy chilled cast iron melting amount in the nodularization hole, unit is a weight percentage; On nodulizing agent, cover insulating covering agent, increased pressure board on insulating covering agent again, the smelting temperature of low-alloy chilled cast iron is 1520 ± 70 ℃, the teeming temperature of low-alloy chilled cast iron molten iron is 1400 ± 50 ℃;
The final chemical ingredients of described low-alloy chilled cast iron is: carbon 3.5～3.8%, and silicon 1.5～1.9%, manganese are greater than 0, smaller or equal to 1.0%, phosphorus is less than 0.05%, sulphur is less than 0.02%, and chromium is greater than 0, smaller or equal to 1.0%, and surplus is iron and inevitable micro impurity element; Unit is a weight percentage;
The fracture of described white pig iron is white in color, hardness HRc40～55.
2. low-alloy chilled cast iron according to claim 1, the add-on that it is characterized in that described nodulizing agent is 1.6～1.8% of a melting amount.
3. low-alloy chilled cast iron according to claim 1, it is characterized in that described nodulizing agent is common magnesium-rare earth, main component is: calcium 1.0～2.0%, silicon 40～45%, magnesium 6.0～8.0%, rare earth 2.5～3.5% and barium 1.0～2.0%, all the other are iron, and unit is a weight percentage.
4. low-alloy chilled cast iron according to claim 1, it is characterized in that: the composition of described insulating covering agent is common 75# ferrosilicon.
5. the application of low-alloy chilled cast iron in the Cereals Processing Machines parts according to claim 1.
6. application as claimed in claim 5 is characterized in that, described Cereals Processing Machines parts are feed rolls and agitating roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102432697A CN101463446B (en) | 2008-12-22 | 2008-12-22 | Low-alloy white cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102432697A CN101463446B (en) | 2008-12-22 | 2008-12-22 | Low-alloy white cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101463446A CN101463446A (en) | 2009-06-24 |
| CN101463446B true CN101463446B (en) | 2010-12-08 |
Family
ID=40804236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102432697A Active CN101463446B (en) | 2008-12-22 | 2008-12-22 | Low-alloy white cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101463446B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071382B (en) * | 2011-01-14 | 2012-08-22 | 南京信息工程大学 | Corrosion-resistant white cast iron material and preparation method thereof |
| CN105087847A (en) * | 2014-05-09 | 2015-11-25 | 镇江忆诺唯记忆合金有限公司 | Synthetic cast iron technology for producing high-strength grey cast iron |
| CN107937798A (en) * | 2017-11-24 | 2018-04-20 | 靖江市新东机械零部件制造有限公司 | High yield strength white cast-iron and its manufacture method |
| CN111593255B (en) * | 2020-05-19 | 2021-08-24 | 山东惠宇汽车零部件有限公司 | Manufacturing process of high-toughness ledeburite malleable cast iron |
-
2008
- 2008-12-22 CN CN2008102432697A patent/CN101463446B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101463446A (en) | 2009-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103436773B (en) | Preparation method of wear-resistant high-chromium cast iron | |
| CN100453674C (en) | Low cost, high-wearability hypereutectic high chromium cast iron and its production method | |
| CN101289731B (en) | CrMnTi narrow hardenability strip pinion steels and method of manufacture | |
| CN101942619B (en) | Glass mould material of alloy cast iron and preparation method thereof | |
| CN105088056A (en) | Manufacturing method for hydraulic castings produced through non-alloyed high-strength gray cast iron | |
| CN103498107A (en) | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof | |
| CN102851574B (en) | Heatproof alloy vermicular cast iron and method for preparing same | |
| CN109182890B (en) | Gray cast iron and smelting method thereof | |
| CN105483505A (en) | Preparation method of high-strength gray cast iron cast cylinder block | |
| CN103498108A (en) | High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof | |
| CN104233052A (en) | Chromium, molybdenum and copper alloy cast iron braking drum and preparation method thereof | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN109023034A (en) | A kind of preparation method of high-strength thin-walled gray iron casting | |
| CN103789600A (en) | Hypereutectic high-chromium iron preparation method | |
| CN104726759A (en) | Production method of as-cast high-strength gray cast iron | |
| CN101463446B (en) | Low-alloy white cast iron | |
| CN112030062A (en) | Method for producing vermicular cast iron | |
| CN103589965A (en) | Low-alloy high-strength cast steel and preparation method thereof | |
| KR20110132563A (en) | Method to obtain a high resistance gray iron alloy for combustion engines and general casts | |
| CN106544578A (en) | A kind of marine diesel engine piston ring apical ring material DPR DG III and its casting method | |
| CN104593663B (en) | A kind of wear-resistant white cast iron and preparation method thereof | |
| CN104962801A (en) | Smelting method of high-strength gray cast iron | |
| ITMI930305A1 (en) | NODULAR CAST IRON AND PROCEDURE FOR OBTAINING NODULAR CAST IRON | |
| CN109609835B (en) | High-toughness wear-resistant nodular cast iron and preparation process and application thereof | |
| CN102373365B (en) | Large-section nodular cast iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 213000 Wuyi Road, Jiangsu, Changzhou, No. 258 Patentee after: CRRC QISHUYAN INSTITUTE Co.,Ltd. Address before: 213011 Wuyi Road, Changzhou, Jiangsu, No. 1, No. Patentee before: CSR QISHUYAN INSTITUTE Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 213000, No. 258, Wuyi Road, Changzhou City, Jiangsu Province Patentee after: CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co.,Ltd. Address before: 213000, No. 258, Wuyi Road, Changzhou City, Jiangsu Province Patentee before: CRRC QISHUYAN INSTITUTE Co.,Ltd. |