CN104195412A - High-strength gray cast iron and cast parts and preparation method thereof - Google Patents
High-strength gray cast iron and cast parts and preparation method thereof Download PDFInfo
- Publication number
- CN104195412A CN104195412A CN201410401741.0A CN201410401741A CN104195412A CN 104195412 A CN104195412 A CN 104195412A CN 201410401741 A CN201410401741 A CN 201410401741A CN 104195412 A CN104195412 A CN 104195412A
- Authority
- CN
- China
- Prior art keywords
- weight part
- iron
- gray cast
- cast iron
- preparation
- 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.)
- Granted
Links
Abstract
The invention discloses high-strength gray cast iron and cast parts and a preparation method thereof. The preparation method comprises the working procedures: (1) preheating pig iron, scrap steel, foundry returns and titanium at the temperature of 1,200-1,300 DEG C; (2) melting the preheated raw materials at the temperature of 1,460-1,470 DEG C, so as to prepare iron melt; (3) adding ferrosilicon, a silico-calcium inoculant and a silico-strontium inoculant into the iron melt, and stirring, so as to prepare inoculated iron melt; (4) adding high-carbon ferromanganese into the inoculated iron melt at the temperature of 1,490-1,510 DEG C, and stirring, so as to prepare the high-strength gray cast iron. The cast parts prepared from the high-strength gray cast iron have excellent mechanical properties.
Description
Technical field
The present invention relates to high-strength gray cast iron field, particularly, relate to the preparation method of a kind of high-strength gray cast iron, foundry goods and this high-strength gray cast iron.
Background technology
The production starting material such as pump case, container, tower, flange, stuffing box body and gland, carbonating tower, bed piece, column, cylinder, gear and nitrated tower are graphitic cast iron, because the tensile strength of existing grey foundry goods is not high, often cause foundry goods when machine-shaping, to occur higher condemnation factor, greatly increased production cost.
Summary of the invention
The object of this invention is to provide a kind of high-strength gray cast iron and its preparation method, the foundry goods being prepared from by this high-strength gray cast iron has excellent mechanical property.
To achieve these goals, the invention provides a kind of preparation method of high-strength gray cast iron, described preparation method comprises:
1) by the operation of the pig iron, steel scrap, foundry returns and titanium preheating at 1200-1300 ℃;
2) by the raw material after preheating at 1460-1470 ℃ melting to make the operation of molten iron;
3) ferrosilicon, silico-calcium nucleating agent, silicon strontium nucleating agent be added in described molten iron and stir to make the operation that breeds molten iron;
4) breed molten iron described in high carbon ferromanganese is added at 1490-1510 ℃ in and stir to make the operation of high-strength gray cast iron.
The present invention also provides a kind of high-strength gray cast iron, and described high-strength gray cast iron is that above-mentioned method is prepared from.
The present invention also provides a kind of foundry goods, and described foundry goods is formed by above-mentioned high-strength gray cast iron casting.
High-strength gray cast iron provided by the invention has excellent tensile strength and hardness, thereby makes the foundry goods being prepared from by this high-strength gray cast iron can be used as all kinds of high strength, HI high impact machine tool.The preparation method of this high-strength gray cast iron is simple simultaneously, and raw material is easy to get.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
The present invention also provides a kind of preparation method of high-strength gray cast iron, and described preparation method comprises:
1) by the operation of the pig iron, steel scrap, foundry returns and titanium preheating at 1200-1300 ℃;
2) by the raw material after preheating at 1460-1470 ℃ melting to make the operation of molten iron;
3) ferrosilicon, silico-calcium nucleating agent, silicon strontium nucleating agent be added in described molten iron and stir to make the operation that breeds molten iron;
4) breed molten iron described in high carbon ferromanganese is added at 1490-1510 ℃ in and stir to make the operation of high-strength gray cast iron.
In the present invention, the consumption of each raw material is carved characters, and wide scope is interior to be selected, in order to make to make high-strength gray cast iron, there is more excellent mechanical property, preferably, wherein, the pig iron with respect to 100 weight parts, the consumption of described steel scrap is 60-75 weight part, the consumption of described foundry returns is 100-120 weight part, the consumption of described ferrosilicon is 2-5 weight part, and the consumption of described silico-calcium nucleating agent is 0.5-1.5 weight part, and the consumption of described silicon strontium nucleating agent is 0.5-0.9 weight part, the consumption of described high carbon ferromanganese is 1-3 weight part, and the consumption of described titanium is 1-1.5 weight part.
In the present invention, the described pig iron can be selected in wide scope, can be the pig iron that the trade mark is Z18, Z14 or Z22, in order to make to make high-strength gray cast iron, has more excellent mechanical property, and preferably, the described pig iron is that the trade mark is the pig iron of Z18.
In the present invention, described steel scrap can be discarded steel arbitrarily, in order to make to make high-strength gray cast iron, there is more excellent mechanical property, preferably, for the steel scrap of 100 weight parts, in described steel scrap, contain the carbon of 0.2-0.4 weight part, the manganese element of 0.1-0.4 weight part, the phosphoric of 0.01-0.02 weight part, the ferro element of surplus and inevitably trace element.
In the present invention, described steel scrap can be foundry returns arbitrarily, in order to make to make high-strength gray cast iron, there is more excellent mechanical property, preferably, with respect to the foundry returns of 100 weight parts, in described foundry returns, contain the carbon of 3.6-3.8 weight part, the manganese element of the element silicon of 2.3-2.8 weight part, 0.05-0.1 weight part, the element sulphur of 0.01-0.03 weight part, the phosphoric of 0.01-0.03 weight part, the ferro element of surplus and inevitably trace element.
In the present invention, ferrosilicon is well-known to those skilled in the art for stoping iron to form carbide, promoting the auxiliary agent with nodularization of separating out of graphite, ferrosilicon can be commercially available any one, in order to make to make high-strength gray cast iron, there is more excellent mechanical property, preferably, described ferrosilicon is that the trade mark is the ferrosilicon of FeSi90Al1.5 or FeSi90Al3.
In the present invention, high carbon ferromanganese is well-known to those skilled in the art for promoting the additive of spheroidal graphite cast iron graphite crystallization globulate, ferrosilicon can be commercially available any one, in order to make to make high-strength gray cast iron, there is more excellent mechanical property, preferably, described high carbon ferromanganese is that the trade mark is 65 or 75 high carbon ferromanganese.
The present invention also provides a kind of high-strength gray cast iron, and described high-strength gray cast iron is prepared from by above-mentioned method.
The present invention also provides a kind of foundry goods, and described foundry goods is formed by above-mentioned high-strength gray cast iron casting.
Below will describe the present invention by embodiment.In following examples, tensile strength parameter records by the method for GB 9439-2010.
The pig iron is the commercially available product that the Hangzhou Ji Hui metallic substance company limited trade mark is Z18, steel scrap is the product of Liaocheng City Dechang Steel Tube Co., ltd, foundry returns is the product of source, Junan County sky steel strontium products factory, carburelant is the coke of Jiyuan City Ao Xin trade Co., Ltd, ferrosilicon is that to open up the metallurgical limited liability company trade mark be the product of FeSi90Al1.5 or FeSi90Al3 in Anyang China, silico-calcium nucleating agent is the product that Nai Cai company limited sent out metallurgical by Anyang iron, silicon strontium nucleating agent is the product of Changzhou Run Liang iron alloy company limited, high carbon ferromanganese is the product that Xiang Tan Wei Xinmeng Products Co., Ltd trade mark is 65, titanium is the Southern Pass, Shanghai metal products company limited.
Embodiment 1
First the pig iron 100kg that is Z18 by the trade mark, steel scrap 70kg, foundry returns 110kg and titanium 1.3kg preheating 30min at 1250 ℃; Then by the raw material after preheating at 1465 ℃ melting to make molten iron; Then the ferrosilicon 0.4kg that is FeSi90Al1.5 by the trade mark, silico-calcium nucleating agent 0.9kg, silicon strontium nucleating agent 0.7kg are added in described molten iron and stir and breed molten iron to make; In breeding molten iron described in the high carbon ferromanganese 1.5kg that is finally 65 by the trade mark is added at 1500 ℃, also stir to make high-strength gray cast iron.
Wherein, the carbon that contains 0.3 % by weight in described steel scrap, the manganese element of 0.3 % by weight, the phosphoric of 0.01 % by weight, the ferro element of surplus and inevitably trace element; The phosphoric of the element sulphur of the manganese element of the element silicon of the carbon that contains 3.7 % by weight in described foundry returns, 2.5 % by weight, 0.07 % by weight, 0.02 % by weight, 0.02 % by weight, the ferro element of surplus and inevitably micro-.The particle diameter of coke is 0.4mm.
The tensile strength of this high-strength gray cast iron is 215MPa.
Embodiment 2
First the pig iron 100kg that is Z18 by the trade mark, steel scrap 60kg, foundry returns 100kg and titanium 1kg preheating 30min at 1250 ℃; Then by the raw material after preheating at 1460 ℃ melting to make molten iron; Then the ferrosilicon 0.2kg that is FeSi90Al1.5 by the trade mark, silico-calcium nucleating agent 0.5kg, silicon strontium nucleating agent 0.5kg are added in described molten iron and stir and breed molten iron to make; In breeding molten iron described in the high carbon ferromanganese 1kg that is finally 65 by the trade mark is added at 1490 ℃, also stir to make high-strength gray cast iron.
Wherein, the carbon that contains 0.3 % by weight in described steel scrap, the manganese element of 0.3 % by weight, the phosphoric of 0.01 % by weight, the ferro element of surplus and inevitably trace element; The phosphoric of the element sulphur of the manganese element of the element silicon of the carbon that contains 3.7 % by weight in described foundry returns, 2.5 % by weight, 0.07 % by weight, 0.02 % by weight, 0.02 % by weight, the ferro element of surplus and inevitably micro-.The particle diameter of coke is 0.4mm.
The tensile strength of this high-strength gray cast iron is 210MPa.
Embodiment 3
First the pig iron 100kg that is Z18 by the trade mark, steel scrap 75kg, foundry returns 120kg and titanium 1.5kg preheating 30min at 1250 ℃; Then by the raw material after preheating at 1470 ℃ melting to make molten iron; Then the ferrosilicon 0.6kg that is FeSi90Al1.5 by the trade mark, silico-calcium nucleating agent 1.5kg, silicon strontium nucleating agent 0.9kg are added in described molten iron and stir and breed molten iron to make; In breeding molten iron described in the high carbon ferromanganese 1.5kg that is finally 65 by the trade mark is added at 1510 ℃, also stir to make high-strength gray cast iron.
Wherein, the carbon that contains 0.3 % by weight in described steel scrap, the manganese element of 0.3 % by weight, the phosphoric of 0.01 % by weight, the ferro element of surplus and inevitably trace element; The phosphoric of the element sulphur of the manganese element of the element silicon of the carbon that contains 3.7 % by weight in described foundry returns, 2.5 % by weight, 0.07 % by weight, 0.02 % by weight, 0.02 % by weight, the ferro element of surplus and inevitably micro-.The particle diameter of coke is 0.4mm.
The tensile strength of this high-strength gray cast iron is 210MPa.
Embodiment 4
Method according to embodiment 1 makes high-strength gray cast iron, the carbon that different is contains 0.2 % by weight in described steel scrap, the manganese element of 0.1 % by weight, the phosphoric of 0.01 % by weight, the ferro element of surplus and inevitably trace element.
The tensile strength of this high-strength gray cast iron is 209MPa.
Embodiment 5
Method according to embodiment 1 makes high-strength gray cast iron, the carbon that different is contains 0.4 % by weight in described steel scrap, the manganese element of 0.4 % by weight, the phosphoric of 0.02 % by weight, the ferro element of surplus and inevitably trace element.
The tensile strength of this high-strength gray cast iron is 212MPa.
Embodiment 6
Method according to embodiment 1 makes high-strength gray cast iron, and different is carbon, the element silicon of 2.3 % by weight, the element sulphur of the manganese element of 0.05 % by weight, 0.01 % by weight, the phosphoric of 0.01 % by weight, the ferro element of surplus and the inevitably trace element that contains 3.6 % by weight in described foundry returns.
The tensile strength of this high-strength gray cast iron is 213MPa.
Embodiment 7
Method according to embodiment 1 makes high-strength gray cast iron, and different is carbon, the element silicon of 2.8 % by weight, the element sulphur of the manganese element of 0.1 % by weight, 0.03 % by weight, the phosphoric of 0.03 % by weight, the ferro element of surplus and the inevitably trace element that contains 3.8 % by weight in described foundry returns.
The tensile strength of this high-strength gray cast iron is 211MPa.
Embodiment 8
Method according to embodiment 1 makes high-strength gray cast iron, and the particle diameter of different is coke is 0.15mm.
The tensile strength of this high-strength gray cast iron is 208MPa.
Embodiment 9
Method according to embodiment 1 makes high-strength gray cast iron, and the particle diameter of different is coke is 0.6mm.
The tensile strength of this high-strength gray cast iron is 205MPa.
Comparative example 1
Method according to embodiment 1 makes high-strength gray cast iron, and different is not contain silico-calcium nucleating agent.
The tensile strength of this high-strength gray cast iron is 187MPa.
Comparative example 2
Method according to embodiment 1 makes high-strength gray cast iron, and different is not contain silicon strontium nucleating agent.
The tensile strength of this high-strength gray cast iron is 195MPa.
Comparative example 3
Method according to embodiment 1 makes high-strength gray cast iron, and the temperature that the operation of molten iron is bred in preparation that different is is 1440 ℃.
The tensile strength of this high-strength gray cast iron is 183MPa.
Comparative example 4
Method according to embodiment 1 makes high-strength gray cast iron, and the temperature that different is breeds the operation of molten iron is 1480 ℃.
The tensile strength of this high-strength gray cast iron is 177MPa.
Comparative example 5
Method according to embodiment 1 makes high-strength gray cast iron, and the temperature that different is makes the operation of high-strength gray cast iron is 1485 ℃.
The tensile strength of this high-strength gray cast iron is 175MPa.
Comparative example 6
Method according to embodiment 1 makes high-strength gray cast iron, and the temperature that different is makes the operation of high-strength gray cast iron is 1530 ℃.
The tensile strength of this high-strength gray cast iron is 179MPa.
Known by above-described embodiment and comparative example, high-strength gray cast iron provided by the invention has excellent tensile strength, thereby makes it have excellent mechanical property.More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a preparation method for high-strength gray cast iron, is characterized in that, described preparation method comprises:
1) by the operation of the pig iron, steel scrap, foundry returns and titanium preheating at 1200-1300 ℃;
2) by the raw material after preheating at 1460-1470 ℃ melting to make the operation of molten iron;
3) ferrosilicon, silico-calcium nucleating agent, silicon strontium nucleating agent be added in described molten iron and stir to make the operation that breeds molten iron;
4) breed molten iron described in high carbon ferromanganese is added at 1490-1510 ℃ in and stir to make the operation of high-strength gray cast iron.
2. preparation method according to claim 1, wherein, the pig iron with respect to 100 weight parts, the consumption of described steel scrap is 60-75 weight part, and the consumption of described foundry returns is 100-120 weight part, and the consumption of described ferrosilicon is 2-5 weight part, the consumption of described silico-calcium nucleating agent is 0.5-1.5 weight part, the consumption of described silicon strontium nucleating agent is 0.5-0.9 weight part, and the consumption of described high carbon ferromanganese is 1-3 weight part, and the consumption of described titanium is 1-1.5 weight part.
3. preparation method according to claim 1 and 2, wherein, the described pig iron is that the trade mark is the pig iron of Z18.
4. preparation method according to claim 1 and 2, wherein, with respect to the steel scrap of 100 weight parts, in described steel scrap, contain the carbon of 0.2-0.4 weight part, the manganese element of 0.1-0.4 weight part, the phosphoric of 0.01-0.02 weight part, the ferro element of surplus and inevitably trace element.
5. preparation method according to claim 1 and 2, wherein, with respect to the foundry returns of 100 weight parts, in described foundry returns, contain the carbon of 3.6-3.8 weight part, the manganese element of the element silicon of 2.3-2.8 weight part, 0.05-0.1 weight part, the element sulphur of 0.01-0.03 weight part, the phosphoric of 0.01-0.03 weight part, the ferro element of surplus and inevitably trace element.
6. preparation method according to claim 1 and 2, wherein, described ferrosilicon is that the trade mark is the ferrosilicon of FeSi90Al1.5 or FeSi90Al3.
7. preparation method according to claim 1 and 2, wherein, described high carbon ferromanganese is that the trade mark is 65 high carbon ferromanganese.
8. a high-strength gray cast iron, is characterized in that, described high-strength gray cast iron is to be prepared from by the method described in any one in claim 1-7.
9. a foundry goods, is characterized in that, described foundry goods is formed by high-strength gray cast iron casting claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401741.0A CN104195412B (en) | 2014-08-14 | 2014-08-14 | High-strength gray cast iron, foundry goods and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401741.0A CN104195412B (en) | 2014-08-14 | 2014-08-14 | High-strength gray cast iron, foundry goods and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104195412A true CN104195412A (en) | 2014-12-10 |
| CN104195412B CN104195412B (en) | 2016-11-16 |
Family
ID=52080774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410401741.0A Active CN104195412B (en) | 2014-08-14 | 2014-08-14 | High-strength gray cast iron, foundry goods and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104195412B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561737A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | Anti-tensile gray cast iron, casting and preparation method of anti-tensile gray cast iron |
| CN104561736A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron |
| CN105033663A (en) * | 2015-06-12 | 2015-11-11 | 江苏塞维斯数控科技有限公司 | Working table of numerical-control engraving and milling machine |
| CN105033661A (en) * | 2015-06-12 | 2015-11-11 | 江苏塞维斯数控科技有限公司 | CNC (Computer Numerical Control) engraving and milling machine base |
| CN105648305A (en) * | 2016-04-18 | 2016-06-08 | 宝鸡市晨瑞鑫铸造有限责任公司 | High-strength gray cast iron material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230124A (en) * | 2011-06-16 | 2011-11-02 | 芜湖市金贸流体科技股份有限公司 | Anti-wearing heat-resisting cast iron and preparation method thereof |
| CN102634723A (en) * | 2012-05-11 | 2012-08-15 | 郑州机械研究所 | Ferrite ductile iron used at low temperature and manufacturing method thereof |
| CN102935505A (en) * | 2012-11-01 | 2013-02-20 | 中原利达铁路轨道技术发展有限公司 | Casting method of low temperature resistant iron cushion plate for high speed railway buckling part |
| CN103361540A (en) * | 2013-07-05 | 2013-10-23 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy high-strength gray cast iron and preparation method thereof |
| CN103882279A (en) * | 2014-03-31 | 2014-06-25 | 江苏力源金河铸造有限公司 | Method for smelting high-strength grey-iron cast |
-
2014
- 2014-08-14 CN CN201410401741.0A patent/CN104195412B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230124A (en) * | 2011-06-16 | 2011-11-02 | 芜湖市金贸流体科技股份有限公司 | Anti-wearing heat-resisting cast iron and preparation method thereof |
| CN102634723A (en) * | 2012-05-11 | 2012-08-15 | 郑州机械研究所 | Ferrite ductile iron used at low temperature and manufacturing method thereof |
| CN102935505A (en) * | 2012-11-01 | 2013-02-20 | 中原利达铁路轨道技术发展有限公司 | Casting method of low temperature resistant iron cushion plate for high speed railway buckling part |
| CN103361540A (en) * | 2013-07-05 | 2013-10-23 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy high-strength gray cast iron and preparation method thereof |
| CN103882279A (en) * | 2014-03-31 | 2014-06-25 | 江苏力源金河铸造有限公司 | Method for smelting high-strength grey-iron cast |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561737A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | Anti-tensile gray cast iron, casting and preparation method of anti-tensile gray cast iron |
| CN104561736A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron |
| CN105033663A (en) * | 2015-06-12 | 2015-11-11 | 江苏塞维斯数控科技有限公司 | Working table of numerical-control engraving and milling machine |
| CN105033661A (en) * | 2015-06-12 | 2015-11-11 | 江苏塞维斯数控科技有限公司 | CNC (Computer Numerical Control) engraving and milling machine base |
| CN105648305A (en) * | 2016-04-18 | 2016-06-08 | 宝鸡市晨瑞鑫铸造有限责任公司 | High-strength gray cast iron material and preparation method thereof |
| CN105648305B (en) * | 2016-04-18 | 2017-12-01 | 宝鸡市晨瑞鑫铸造有限责任公司 | High-strength gray cast iron material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104195412B (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104195412A (en) | High-strength gray cast iron and cast parts and preparation method thereof | |
| CN104561738A (en) | Anti-tensile spheroidal graphite cast iron, casting and preparation method of anti-tensile spheroidal graphite cast iron | |
| CN104195411A (en) | High-strength gray cast iron and cast parts and preparation method thereof | |
| CN104561736A (en) | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron | |
| CN105603297A (en) | Preparation method of high-strength and corrosion-resistant low-carbon steel | |
| CN104195422A (en) | Large-section nodular cast iron and cast parts and preparation method thereof | |
| CN104561735A (en) | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron | |
| CN105018678B (en) | A kind of steel desulfurization agent and its sulfur method and method for making steel | |
| CN103556032A (en) | Method for preparing ultrathin-walled vermicular graphite cast iron | |
| CN103722159B (en) | The casting method of rear axle support of heavy truck | |
| CN106811677A (en) | A kind of piston ring carrier cast iron materials and its manufacture method | |
| CN103409700B (en) | For Preparation technology of alloy steel of train buffer | |
| CN104561737A (en) | Anti-tensile gray cast iron, casting and preparation method of anti-tensile gray cast iron | |
| CN104195421A (en) | Large-section nodular cast iron and cast parts and preparation method thereof | |
| CN103088245A (en) | Manganese-iron alloy | |
| CN104946958A (en) | Preparation method and application of gray pig iron inoculant | |
| CN104561746A (en) | Large-section ductile cast irons, castings and preparation method thereof | |
| US2488513A (en) | Production of white cast iron | |
| CN102268592B (en) | High speed railway tensing stretch-draw lock casting | |
| CN104593661A (en) | Large cross-section nodular cast iron as well as cast and preparation method thereof | |
| KR20200088942A (en) | Manufacturing method for cast iron for durability reinforced farming machine and cast iron thereby | |
| CN108950367B (en) | Preparation method of high-performance nodular cast iron | |
| CN105648320A (en) | High-strength iron alloy | |
| CN104087835A (en) | Jack piston and preparation method thereof | |
| CN105369003A (en) | Preparing method for an inoculant for cam shaft and application of nucleating agent |
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 |