CN107541691A - A kind of galvanizing flux containing rare earth and preparation method thereof - Google Patents
A kind of galvanizing flux containing rare earth and preparation method thereof Download PDFInfo
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- CN107541691A CN107541691A CN201710664945.7A CN201710664945A CN107541691A CN 107541691 A CN107541691 A CN 107541691A CN 201710664945 A CN201710664945 A CN 201710664945A CN 107541691 A CN107541691 A CN 107541691A
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Abstract
The present invention relates to a kind of galvanizing flux containing rare earth and preparation method thereof.The galvanizing flux includes：0.5~1.5%wt rare earth, 0.5~1.5wt% aluminium, remaining is zinc.The preparation method of above-mentioned galvanizing flux includes:Aluminium is melted, rare earth is added, rare earth aluminium intermediate alloy is made；Zinc is heated and melted, above-mentioned rare earth aluminium intermediate alloy is added, galvanizing flux containing rare earth is made.Galvanizing flux containing rare earth provided by the invention and preparation method thereof has the following advantages that：Preparing for rare earth aluminium intermediate alloy is raw materials used using rafifinal and high-purity mischmetal, smelts, pours into a mould and complete under vacuum conditions, greatly avoids bringing into for impurity element；Obtained high-purity rare earth aluminium intermediate alloy is added in the zinc pot melted by high-purity zinc, obtains the galvanizing flux containing rare earth of high-purity, while utilizes the property of rare earth, improves the tack and corrosion resistance of heat galvanizing liquid.
Description
Technical field
The present invention relates to the zinc-plated field of cold-reduced sheet, more particularly to a kind of galvanizing flux containing rare earth and preparation method thereof.
Background technology
Galvanizing is widely used in preventing or reduces the corrosion of steel product, especially Automobile Plate.But with recent years
The development of auto industry, to Automobile Plate performance requirement more and more higher, it is necessary to further improve the tack of zinc coat and corrosion-resistant
Property, there is an urgent need to improve the corresponding performance of galvanizing flux.Rare earth element is referred to as " industrial monosodium glutamate ", has the energy such as oxygen uptake, sulphur, hydrogen
Power, purification and Microalloying Effect are played, rare earth element is added in galvanizing flux, above effect can be played.
At present in zinc liquid plus rare earth method have it is a variety of, in the direct zinc liquid to after fusing having plus rare earth, but melting temperature
Degree is higher；Al-RE intermediate alloys are made using intermediate frequency furnace in some, even if but casting process using inert gas shielding, it is also difficult
To ensure the high cleanliness of composition.
The content of the invention
In view of this, the present invention provides a kind of galvanizing flux containing rare earth and preparation method thereof.
The present invention provides a kind of galvanizing flux containing rare earth, and it includes：0.5~1.5%wt rare earth, 0.5~1.5wt%
Aluminium, remaining is zinc.
Further, rare earth is the mischmetal being made up of La, Ce, and wherein La and Ce respectively account for 50wt%.
Further, the norium total amount and aluminium weight ratio are 1:1.
The present invention also provides a kind of preparation method of the above-mentioned galvanizing flux containing rare earth, and it includes:
Step 1), aluminium melted, add rare earth, rare earth-aluminium intermediate alloy is made；
Step 2), zinc is heated and melted, added above-mentioned rare earth-aluminium intermediate alloy, galvanizing flux containing rare earth is made.
Further, aluminium purity >=99.99% in the step 1), is shaped as bar-shaped.
Further, step 1) middle rare earth purity >=99.99%, the rare earth are that the mixing being made up of La, Ce is dilute
Soil, wherein La and Ce respectively account for 50wt%.
Further, the preparation of the step 1) middle rare earth-aluminium intermediate alloy uses 50kg vaccum sensitive stoves, and it was prepared
Journey is as follows：
A, the aluminium bar matched is placed in stove first, vacuumized, heated, add and carry when temperature reaches 700~900 DEG C
It is preposition to be poured into a mould in the rare earth in feed bin, stirring 3~5 minutes, preparation；
B, water cooled copper mould is preposition in vacuum drying oven in vacuumizing, smelting is poured into copper mold under vacuum conditions after terminating
In, intermediate alloy quickly cools down in copper mold, and intermediate alloy strand weight is 25kg/ blocks；
Smelting and the cast flow is all completed under vacuum conditions.
Further, zinc purity >=99.99% in the step 2), 460 DEG C~560 DEG C of heating-up temperature, time are 2~4
Hour.
Relative to prior art, galvanizing flux containing rare earth provided by the invention and preparation method thereof has the following advantages that：
Preparing for rare earth-aluminium intermediate alloy is raw materials used using rafifinal and high-purity mischmetal, smelts, pours into a mould true
Completed under dummy status, greatly avoid bringing into for impurity element；
Obtained high-purity rare earth-aluminium intermediate alloy is added in the zinc pot melted by high-purity zinc, obtains high-purity
Galvanizing flux containing rare earth, while using the property (oxygen uptake, sulphur, hydrogen, inoxidizability etc.) of rare earth, improve the attached of heat galvanizing liquid
The property and corrosion resistance.
Embodiment
The invention discloses a kind of galvanizing flux containing rare earth and preparation method thereof, those skilled in the art can be used for reference in this paper
Hold, be suitably modified technological parameter realization.In particular, all similar replacements and change are to those skilled in the art
For be it will be apparent that they are considered as being included in the present invention.The method of the present invention and application are by preferably implementing
Example is described, related personnel substantially can not depart from present invention, in spirit and scope to method described herein and
Using being modified or suitably change with combining, to realize and using the technology of the present invention.
The present invention provides a kind of galvanizing flux containing rare earth, and it includes：0.5~1.5%wt rare earth, 0.5~1.5wt%
Aluminium, remaining is zinc.
Further, rare earth is the mischmetal being made up of La, Ce, and wherein La and Ce respectively account for 50wt%.
Further, the norium total amount and aluminium weight ratio are 1:1.
Accordingly, the present invention also provides a kind of preparation method of the above-mentioned galvanizing flux containing rare earth, and it includes:
Step 1), aluminium melted, add rare earth, rare earth-aluminium intermediate alloy is made；
Step 2), zinc is heated and melted, added above-mentioned rare earth-aluminium intermediate alloy, galvanizing flux containing rare earth is made.
Further, aluminium purity >=99.99% in the step 1), is shaped as bar-shaped.
Further, step 1) middle rare earth purity >=99.99%, the rare earth are that the mixing being made up of La, Ce is dilute
Soil, wherein La and Ce respectively account for 50wt%.
Preferably, the preparation of the step 1) middle rare earth-aluminium intermediate alloy uses 50kg vaccum sensitive stoves, its preparation process
It is as follows：
A, the aluminium bar matched is placed in stove first, vacuumized, heated, add and carry when temperature reaches 700~900 DEG C
It is preposition to be poured into a mould in the rare earth in feed bin, stirring 3~5 minutes, preparation；
B, water cooled copper mould is preposition in vacuum drying oven in vacuumizing, smelting is poured into copper mold under vacuum conditions after terminating
In, intermediate alloy quickly cools down in copper mold, and intermediate alloy strand weight is 25kg/ blocks；
Smelting and the cast flow is all completed under vacuum conditions.Raw material of the present invention is dilute using the aluminium of high-purity and mixing
Soil, whole smelting, cast flow are completed under vacuum conditions, substantially increase the degree of purity of intermediate alloy.
Preferably, zinc purity >=99.99% in the step 2), 460 DEG C~560 DEG C of heating-up temperature, time are 2~4 small
When.The rare earth-aluminium intermediate alloy prepared in step 1) is added, the temperature of galvanizing flux containing rare earth is made, improving heating-up temperature can contract
The short heat time.
Relative to prior art, galvanizing flux provided by the invention and preparation method thereof has the following advantages that：
Preparing for rare earth-aluminium intermediate alloy is raw materials used using rafifinal and high-purity mischmetal, smelts, pours into a mould true
Completed under dummy status, greatly avoid bringing into for impurity element；
Obtained high-purity rare earth-aluminium intermediate alloy is added in the zinc pot melted by high-purity zinc, obtains high-purity
Galvanizing flux containing rare earth, while using the property (oxygen uptake, sulphur, hydrogen, inoxidizability etc.) of rare earth, improve the attached of heat galvanizing liquid
The property and corrosion resistance.
The galvanizing production produced by using the zinc liquid of the present invention, effectively improve the tack of the zinc layers of steel plate and corrosion-resistant
Property, can solve user proposes before this dezincification and white rust quality objection, bring benefits about 200,000 yuan/year.Separately to value of the product
Lifted 10 yuan/ton (400,000 tons of annual productions), brought benefits about 4,000,000/year, altogether about 4,200,000 yuan/year.
With reference to embodiment, the present invention is expanded on further：
Embodiment
The first step：The preparation of rare earth-aluminium intermediate alloy
Will be by 1:1 aluminium bar matched is respectively placed in the common 50kg of La, Ce mixing pure rare earth in vaccum sensitive stove and feed bin
It is interior, while a pair of water cooled copper moulds are placed in stove, then start to vacuumize, aluminium bar is heated, added when temperature reaches 800 DEG C
Mischmetal, stir 5 minutes, then liquation is poured into copper mold under vacuum conditions, rare earth-aluminium intermediate alloy is in copper mold
Quick cooling, weight is 25kg/ blocks.Solidification terminates rear vacuum breaker, takes out rare earth-aluminium intermediate alloy sample.
Second step：Galvanizing process
The zinc of purity >=99.99% is melted in hot-dip galvanized pan, phase is added according to the change of zinc amount in galvanizing process
The rare earth-aluminium intermediate alloy answered, ensure to contain rare earth metal 1.0%, aluminium 1.0% in galvanizing process zinc liquid.Galvanizing process strip with
Bath temperature control is at 480 DEG C, control accuracy：+/-3℃.
After galvanizing flux adds rare earth, the salt fog resistance corrosivity of product surface be improved significantly, solve part of earlier stage production
Pint zinc and white rust quality problems, product appearance are also further beautified.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
- A kind of 1. galvanizing flux containing rare earth, it is characterised in that including：0.5~1.5%wt rare earth, 0.5~1.5wt% aluminium, its Remaining is zinc.
- 2. according to galvanizing flux containing rare earth described in claims 1, it is characterised in that rare earth is the mischmetal being made up of La, Ce, Wherein La and Ce respectively account for 50wt%.
- 3. according to galvanizing flux containing rare earth described in claims 2, it is characterised in that the norium total amount and aluminium weight Than for 1:1.
- 4. the preparation method of the galvanizing flux containing rare earth described in claims 1, it is characterised in that including:Step 1), aluminium melted, add rare earth, rare earth-aluminium intermediate alloy is made；Step 2), zinc is heated and melted, added above-mentioned rare earth-aluminium intermediate alloy, galvanizing flux containing rare earth is made.
- 5. according to the preparation method described in claims 4, it is characterised in that aluminium purity >=99.99%, shape in the step 1) Shape is bar-shaped.
- 6. according to the preparation method described in claims 4, it is characterised in that step 1) middle rare earth purity >=99.99%, The rare earth is the mischmetal being made up of La, Ce, and wherein La and Ce respectively account for 50wt%.
- 7. according to the preparation method described in claims 4, it is characterised in that the step 1) middle rare earth-aluminium intermediate alloy Prepare and use 50kg vaccum sensitive stoves, its preparation process is as follows：A, the aluminium bar matched is placed in stove first, vacuumized, heated, add when temperature reaches 700~900 DEG C and put in advance In the rare earth in feed bin, stir 3~5 minutes, prepare cast；B, water cooled copper mould is preposition in vacuum drying oven in vacuumizing, smelting is poured into copper mold under vacuum conditions after terminating, in Between alloy quickly cooled down in copper mold, intermediate alloy strand weight is 25kg/ blocks；Smelting and the cast flow is all completed under vacuum conditions.
- 8. according to the preparation method described in claims 4, it is characterised in that zinc purity >=99.99% in the step 2), add Hot 460 DEG C~560 DEG C of temperature, time are 2~4 hours.
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| CN201710664945.7A CN107541691A (en) | 2017-08-07 | 2017-08-07 | A kind of galvanizing flux containing rare earth and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565804A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | Galvanizing flux and preparation method thereof |
| CN101812654A (en) * | 2010-05-18 | 2010-08-25 | 梁士臣 | Hot-dip zinc aluminum magnesium rare earth coated steel strips taking air as air source of air knife during production |
| CN105803371A (en) * | 2016-05-25 | 2016-07-27 | 广西民族大学 | Hot galvanizing furnace hearth composite alloy and implementation process |
-
2017
- 2017-08-07 CN CN201710664945.7A patent/CN107541691A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565804A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | Galvanizing flux and preparation method thereof |
| CN101812654A (en) * | 2010-05-18 | 2010-08-25 | 梁士臣 | Hot-dip zinc aluminum magnesium rare earth coated steel strips taking air as air source of air knife during production |
| CN105803371A (en) * | 2016-05-25 | 2016-07-27 | 广西民族大学 | Hot galvanizing furnace hearth composite alloy and implementation process |
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Application publication date: 20180105 |