CN107779547A - Rare earth 1#Technique for applying of the alloy in cast steel - Google Patents
Rare earth 1#Technique for applying of the alloy in cast steel Download PDFInfo
- Publication number
- CN107779547A CN107779547A CN201610788164.4A CN201610788164A CN107779547A CN 107779547 A CN107779547 A CN 107779547A CN 201610788164 A CN201610788164 A CN 201610788164A CN 107779547 A CN107779547 A CN 107779547A
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- Prior art keywords
- rare earth
- alloy
- cast steel
- molten metal
- technique
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Classifications
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to rare earth 1#Technique for applying of the alloy in cast steel.The present invention includes：(1) rare earth 1#Adding Way of the alloy in cast steel, (2) rare earth 1#Addition of the alloy in cast steel, the points for attention etc. in (3) concrete operation method, and operation.The present invention is proposed only in rare earth 1#Alloy adds technique (Adding Way and addition) rationally, and on the premise of suitable operation, can just make rare earth 1#Alloy plays degasification, desulfurization, improves molten metal mobility, crystal grain thinning, improves form of field trash and other effects in molten metal；So as to improve the Melting Quality of cast steel, the mechanical performance of casting is improved, and significantly reduces the percent defective of casting, reduces production cost, improves the economic benefit of enterprise.
Description
Technical field
The invention belongs to rare earth 1#Technique for applying of the alloy in cast steel.
Technical background
Introduced according to data [1]：Rare earth element can improve the mobility of molten metal for cast steel, strengthen the feeding of molten metal
Ability, improve Production Practice of Casting Technologies and improve the mechanical performance of casting；Rare earth has purification in a metal simultaneously, rotten and alloying
Effect.Rare earth element is described into wonder drug, the institute that can almost solve cast steel or casting is defective in quality；And some data are then
Think that rare earth element effect is little.
Present invention is disclosed rare earth 1#Alloy (in production commonly use) is with the difference for adding technique, and in operating process
Control method is different, and difference on effect is very big.
The content of the invention
1st, rare earth 1#The Adding Way of alloy
Method is poured using casting ladle.The rare earth 1 fully toasted is put into baked casting ladle#Alloy, and it is put into vegetation
Grey or other covertures；Molten metal is injected in casting ladle again.
Casting ladle pours the advantages of method：
--- Adding Way is simple, easily operation；
--- than more uniform, the rate of recovery is 50%~80% for rare earth element residual quantity in sample
Shortcoming：
--- the temperature of molten metal is uncontrollable consistent in each casting ladle.
2nd, rare earth 1#The addition of alloy
Addition wants " appropriate ".The quality of at most molten metal degenerates, and does not have due effect at least.It is situated between according to data [2]
Continue, the formula that the addition of rare earth element is proposed by SKLu is estimated：Re add=5.85 ([0] original-[0] residual)+
2.93 ([S] original-[S] residual)+Re residuals.The formula has certain directive significance to production, but does not account for rare earth
The scaling loss of element.
It is considered herein that rare earth 1#The addition of alloy should meet the requirement of four aspects：Deoxidation, desulfurization, scaling loss and residual.
Especially to take into full account rare earth 1#The scaling loss amount of alloy.
When pouring method using casting ladle, rare earth 1 is added#Alloy is advisable for 0.15% of quality of molten metal in casting ladle.At this moment it is dilute
The rate of recovery of earth elements is 50~80%, and residual quantity is 0.08~0.12%.
Specific embodiment
1st, implementation condition
(1) steel grade is implemented：ZG45、ZG20CrMnMo；
(2) equipment is selected：500 kilograms of coreless power frequency induction furnaces (acid lining)；
(3) material is needed：Rare earth 1#Alloy.
2nd, technique is added：Method, rare earth 1 are poured using casting ladle#The addition of alloy is the quality of molten metal in casting ladle
0.15%.
3rd, the points for attention in production operation
(1) tapping temperature of molten metal is controlled
Rare earth 1#It is the endothermic reaction that alloy, which is added in molten metal,.With rare earth 1#The increase of alloy addition, metal liquid temperature
Degree reduces more；When the quality of molten metal in casting ladle is 60~70Kg, 0.15% rare earth 1 is added#Alloy, molten metal cooling
For 40~60 DEG C；Meanwhile with rare earth 1#The increase of alloy addition, field trash increase.
When pouring method using casting ladle, in order that rare earth 1#Alloy can fully dissolve, be evenly distributed, being advantageous to the upper of field trash
Floating, the tapping temperature of molten metal should be slightly above 20 DEG C~40 DEG C of normal tapping temperature.
(2) rare earth 1 is added#The lumpiness and baking temperature of alloy
Rare earth 1#The addition lumpiness of alloy should meet fully to dissolve, and it is excessive to be unable to scaling loss again.When the molten metal in casting ladle
When quality is 50-70Kg, its lumpiness is that 60-80mm is advisable and (according to the size of casting ladle, gives appropriate adjustment).
The purpose of baking mainly removes rare earth 1#Moisture in alloy.Rare earth 1#500 DEG C of the baking temperature of alloy, baking
Time, 0.5-1h was advisable.Baking temperature is too high, overlong time when, almost become rare earth oxide；Toast insufficient, gold can be caused
Belong to liquid boiling, or produce security incident.
(3) rare earth 1#The addition sequence of alloy
Due to rare earth 1#The affinity of alloy and oxygen is very big, thus molten metal must in stove with aluminium carry out final deoxidizing with
Afterwards, amount that could as required is added in casting ladle.
(4) effect of plant ash or coverture
Plant ash or coverture must be put into casting ladle in advance, it is protected in casting ladle and passes through rare earth 1#Alloy treatment mistake
Molten metal do not produce secondary oxidation.The result of molten metal secondary oxidation, it is the rare earth compound to form big bulk, it is also possible to have
The form in sulfide is damaged, or even has " returning sulphur " phenomenon, i.e. desulfurized effect unobvious.
In order to prevent the secondary oxidation of molten metal, it should suitably accelerate poring rate.
(5) control of time of repose
By rare earth 1#The molten metal that alloy treatment is crossed should stand 2 minutes, floating and removal in favor of field trash.Stand
Time is too short, is unfavorable for the floating of field trash；Time of repose is oversize, and molten metal easily produces secondary oxidation, and molten metal drops
It is warm too many.
4th, result of implementation
(1) in rare earth 1#On the premise of alloy adds rational technology, serve degasification, desulfurization, improve molten metal mobility
Deng effect；So as to reduce casting because of defect caused by shrinkage cavity and porosity and stomata, the percent defective of casting is reduced.
(2) rare earth 1 is added#Alloy generates high-melting-point and the rare earth compound of disperse plays nucleation in molten metal,
Crystal grain is refined；Alleviate branch deviation；Improve the form of carbide and add the depth of point-like carbide lamella；So as to carry
The high mechanical performance and wearability of casting, improve the service life of casting.
(3) invention achieves expected effect.
Claims (3)
1. one kind is with rare earth 1#Technique for applying of the alloy in cast steel.
It includes：
(1) rare earth 1#Adding Way of the alloy in cast steel；
(2) rare earth 1#Addition of the alloy in cast steel；
(3) points for attention in concrete operation method, and operation etc..
2. the rare earth 1 of the present invention as claimed in claim 1#Adding Way of the alloy in cast steel：Casting ladle pours method.
3. the rare earth 1 of the present invention as claimed in claim 1#Addition of the alloy in cast steel：Quality of molten metal in casting ladle
0.15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610788164.4A CN107779547A (en) | 2016-08-26 | 2016-08-26 | Rare earth 1#Technique for applying of the alloy in cast steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610788164.4A CN107779547A (en) | 2016-08-26 | 2016-08-26 | Rare earth 1#Technique for applying of the alloy in cast steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107779547A true CN107779547A (en) | 2018-03-09 |
Family
ID=61450477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610788164.4A Pending CN107779547A (en) | 2016-08-26 | 2016-08-26 | Rare earth 1#Technique for applying of the alloy in cast steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107779547A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988174A (en) * | 2010-12-06 | 2011-03-23 | 宝钢集团新疆八一钢铁有限公司 | Large-scale ball mill liner and heat treatment method thereof |
| CN103215526A (en) * | 2013-04-25 | 2013-07-24 | 西南石油大学 | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof |
| CN105088080A (en) * | 2015-08-10 | 2015-11-25 | 霍邱县忠振耐磨材料有限公司 | High-wear-resistance high manganese steel jaw plate for jaw crusher and preparation method thereof |
| CN105886918A (en) * | 2016-06-01 | 2016-08-24 | 广西柳工机械股份有限公司 | Multi-element composite micro-alloyed cast bucket tooth and manufacturing method thereof |
-
2016
- 2016-08-26 CN CN201610788164.4A patent/CN107779547A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988174A (en) * | 2010-12-06 | 2011-03-23 | 宝钢集团新疆八一钢铁有限公司 | Large-scale ball mill liner and heat treatment method thereof |
| CN103215526A (en) * | 2013-04-25 | 2013-07-24 | 西南石油大学 | Centrifugally-cast high-carbon high-alloy steel and heat treatment method thereof |
| CN105088080A (en) * | 2015-08-10 | 2015-11-25 | 霍邱县忠振耐磨材料有限公司 | High-wear-resistance high manganese steel jaw plate for jaw crusher and preparation method thereof |
| CN105886918A (en) * | 2016-06-01 | 2016-08-24 | 广西柳工机械股份有限公司 | Multi-element composite micro-alloyed cast bucket tooth and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 潘玉洪: "研制熔模铸造稀土钢RZG20CrMnMoRe", 《凿岩机械气动工具》 * |
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Application publication date: 20180309 |