CN106399771B - A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy - Google Patents
A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy Download PDFInfo
- Publication number
- CN106399771B CN106399771B CN201610866175.XA CN201610866175A CN106399771B CN 106399771 B CN106399771 B CN 106399771B CN 201610866175 A CN201610866175 A CN 201610866175A CN 106399771 B CN106399771 B CN 106399771B
- Authority
- CN
- China
- Prior art keywords
- alloy
- alloys
- magnesium
- metal
- molten steel
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy, belong to steel-making and steel-making alloy preparation field.Preparation method uses two step method：1) prepared by Mg Al alloys：After weighing dispensing, using vacuum induction melting into Mg Al ingot castings, it is standby to remove ingot casting oxide layer；2) prepared by Mg Al Fe alloys：After weighing dispensing, using vacuum induction melting Al Fe alloy melts；After cooling with stove, Mg Al ingot castings are added into Al Fe alloy melts, stirring casting, it is standby to remove ingot casting oxide layer.The preparation method of the present invention, molten steel is added with alloy form, appropriate Mg, Al, Fe content is controlled, there is certain dilution function to magnesium metal, be advantageous to the dissolving, diffusion and reaction of magnesium metal；The presence of metallic iron in magnesium alloy prepared by the present invention, you can to improve the fusion temperature of alloy, slow down the release of magnesium metal, the density of alloy can be improved again, emersion molten steel is not easy during use and scaling loss.
Description
Technical field
The invention belongs to make steel and steel-making alloy preparation field, more particularly to a kind of molten steel magnesium processing slow-release magnesium alloy
Preparation method.
Background technology
With the development of all fields of national economy, the requirement to steel performance improves constantly, in the cleanliness factor and steel of steel
Quantity, granularity, form and its distribution of non-metallic inclusion have material impact to the performance of steel.With pneumatic steelmaking, stove
The theoretical progressively development with technique of the steel-making such as outer refining and continuous casting, Cleanliness of Molten Steel controlled level improves constantly, but steel also be present
Material total oxygen content is high, inclusion size is exceeded and the problems such as cleanliness factor control stability difference, causes finished product sheet material flaw detection qualification rate
It is relatively low, stability is poor, it is relatively low to become a useful person, seriously constrain the lifting of Business Economic Benefit.How molten steel is further improved clean
Cleanliness and to be control effectively to steel inclusion composition, granularity and its distribution be urgent problem to be solved.
At present, most commercial batch production steel grades are Al deoxidization steel, and steel inclusion morphology Control mainly uses calcium
Processing combines bottom argon blowing technology, and its main purpose is Al in modified steel2O3It is mingled with, generation liquid calcium aluminate is mingled with and promoted thereon
It is floating to remove, so as to reduce nozzle clogging tendency, improve the castability of molten steel.But in actual production, Calcium treatment Technological expression goes out
Certain limitation, limited by liquid phase calcium aluminate physicochemical properties and rhythm of production, inclusion removal effect does not show
Write and remain in steel, and calcium aluminate field trash belongs to D classes and is mingled with, and the fatigue life of some steel grades is had adverse effect.
Relative to Calcium treatment, the processing of molten steel magnesium receives significant attention in recent years, and existing achievement in research shows, on the one hand, steel
Function of the liquid magnesium processing with cleaning molten steel, can substantially reduce dissolved oxygen and dissolving sulfur content；On the other hand, there is rotten be mingled with
The function of thing, the field trash for the generation small and dispersed distribution that can go bad, reduces harm of the field trash to rolled steel mechanical performance；3rd,
For the welding steel such as the deck of boat and pipeline, the size of generation is tiny, stable components, the magnesium system oxide of Dispersed precipitate is mingled with can
With the pinning crystal boundary in welding process, Intragranular Acicular Ferrite (IGF) forming core is induced, so as to be advantageous to improve welding heat affected zone
(HAZ) tissue and performance.
On molten steel magnesium treatment research, particularly at home, focus mostly in basic theory and laboratory research stage, industry
Change application to have not been reported.Think, the boiling point of magnesium metal is 1107 DEG C, if without suitable feed postition, is being made steel
At a temperature of (~1600 DEG C) can quickly gasify and overflow molten steel, on the one hand, the recovery rate of magnesium metal is relatively low, magnesium treatment effect is difficult to
Ensure；Second, the spilling of magnesium steam can cause molten steel boiling splash and cause oxygenation and inhale nitrogen；3rd, the magnesium metal of spilling exists
Combustion synthesis in air and pollute environment.It was found from above-mentioned analysis, feed postition and the method for magnesium metal turn into the processing industry of molten steel magnesium
Change the restricted link of application.The present invention be exactly in view of the above-mentioned problems, develop a kind of magnesium alloy with slow-release function and its
Preparation method, for promoting conversion of the molten steel magnesium treatment technology from laboratory research to industrial applications, and then it is clean to improve molten steel
Cleanliness and the mechanical performance of finished steel and processing characteristics are significant.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of preparation method of molten steel magnesium processing slow-release magnesium alloy,
It is a kind of preparation method that can control magnesium metal Mg-Al-Fe alloys of rate of release in molten steel.The main pin of the inventive method
To the Al deoxidization steel that commodity production amount is maximum, the purpose is to control rate of release of the magnesium metal in molten steel, magnesium metal is realized
While fusing, while dissolve, side react, so as to control the amount of vaporization of magnesium metal, this not only improves raising magnesium metal recovery rate, improvement magnesium
Treatment effect, secondary oxidation of steel can be avoided again, inhales nitrogen and problem of environmental pollution.
The preparation method of the molten steel magnesium processing slow-release magnesium alloy of the present invention, Mg-Al-Fe alloys are prepared using two step method,
It is specific as follows：
Step 1, prepared by Mg-Al alloys：
(1) raw material selection and burdening calculation：Matched by Mg-Al alloying component, weigh metal Al and metal Mg；Wherein,
The mass percent of Mg-Al alloying components is：Mg：30~70%, surplus is Al and inevitable impurity；Metal Mg quality
For the 105~110% of Theoretical Mass；
(2) alloy smelting：
Using vaccum sensitive stove, metal Mg is placed on graphite crucible bottom, metal Al glands are above metal Mg；
Vaccum sensitive stove is warming up to 950~1000 DEG C, temperature-rise period vacuumizes, when vacuum is less than or equal to 0.01atm,
Inert gas is filled with to 0.85~0.95atm；
It is broken to be spaced apart lid after molten bath is formed, quickly stirred with molybdenum bar, be poured into mould, Mg-Al is obtained after the demoulding
Alloy；
(3) alloy is processed：The oxide layer of Mg-Al alloy surfaces is removed, it is standby；
Step 2, prepared by Mg-Al-Fe alloys：
(1) raw material selection and burdening calculation：
Matched by Al-Fe alloying components, weigh metal Al and metal Fe；Wherein, the mass percent of Al-Fe alloying components
For：Fe：20~50%, surplus Al；
On the basis of Al-Fe alloy amounts, the addition of Mg-Al alloys is calculated, mixes Al-Fe alloys and Mg-Al alloys
The composition and its mass percent of the Mg-Al-Fe alloys obtained after melting be：1~35%Mg, 40~80%Al, surplus Fe
With inevitable impurity；
Mg-Al alloys are weighed, wherein, the actual mass of Mg-Al alloys is the 105~110% of Theoretical Mass；
(2) Al-Fe alloy smeltings：Using vacuum induction furnace smelting, metallic aluminium is placed on electrically molten magnesia crucible bottom,
Metallic iron is placed on above aluminium block；Feeding temperature-raising vacuumizes simultaneously, when vacuum is less than or equal to 0.01atm, is filled with indifferent gas
Body is to 0.85~0.95atm；Continue feeding temperature-raising to 1500~1550 DEG C, aluminium is fused completely with iron；
(3) Al-Fe alloys are cooled to 1100~1250 DEG C, holding alloy melt is liquid；It is broken to be spaced apart lid, carry out magnesium conjunction
Aurification operates, the addition Mg-Al alloys into Al-Fe Alloys, and after the completion of alloying, power transmission stirs 1~2min, pours into
Ingot；
(4) alloy is processed：The oxide layer on ingot casting surface is removed after the demoulding, it is standby.
In described preparation method, the metal Al weighed meets remelting aluminium ingot standard GB/T/T 1196-2008, gold
Category Al selects Al99.50bAnd above trade mark aluminium ingot；The metal Mg weighed meets primary magnesium ingot standard GB/T/T 3499-
2011, metal Mg select Mg99.80 and above trade mark magnesium ingot；Metallic iron uses pure iron as raw material as raw material, meets ingot iron country mark
Quasi- GB/T 9971-2004, and select YT2 and the above trade mark；Purpose is to control impurity element in raw material to produce new dirt to molten steel
Dye.
In described step 1 (1), in Mg-Al alloys, Mg weight/mass percentage composition is 30~70%, is closed according to Mg-Al
Metallograph ensures mutually exist without magnesium metal in alloy after cooling down, to prevent in follow-up second alloying process come what is determined
Gasification, ensure the recovery rate of magnesium and improve operating environment.
In described step 1 (1), the scaling loss of magnesium is considered, magnesium is actual to match somebody with somebody the 105~110% of dosage with dosage to be theoretical.
In described step 1 (2), metal Mg and metal Al are cut into bulk, are sequentially placed into graphite crucible.
In described step 1 (2), inert gas is Ar gas.
In described step 1 (2), inert gas is filled with into vacuum induction melting room.
In described step 1 (2) and step 2 (1), inert gas is filled with to 0.85~0.95atm, makes vacuum sky induction furnace
Interior holding tiny structure.
In described step 1 (3), the oxide layer on ingot casting surface is ground off using emery wheel, and it is standby to cut into appropriate size.
In described step 1 (3), the Mg-Al alloy cast ingots to removing removing oxide layer, sampling carries out constituent analysis, to ensure
Alloying component is in claimed range.
In described step 2 (1), according to Al-Fe phasors, the mass percent of iron is controlled 20~50% in alfer
In the range of.
In described step 2 (3), the method that Mg-Al alloys are added into Al-Fe Alloys is：Pricked and taken using crooked chisel
Mg-Al alloy blocks, insert in Al-Fe aluminium alloys and carry out alloying, so operate repeatedly, until alloying is completed.
In described step 2 (3), cooling method cools to have a power failure.
In described step 2 (3), low-aluminum-content Mg-Al alloys are used cooperatively with high aluminium content Al-Fe alloys, beneficial to carrying
High metal magnesium recovery rate.
In described step 2 (4), the method for removing removing oxide layer is：The oxide layer on ingot casting surface is ground off using emery wheel.
In described step 2 (4), the Mg-Al-Fe alloy cast ingots that go after removing oxide layer, press-stretched is broken into powdered granule system
Standby core-spun yarn, magnesium processing is carried out to molten steel using line feeding mode.
The present invention the processing of molten steel magnesium be with the technical concept of the preparation method of slow-release magnesium alloy：With Mg-Al alloy phase diagrams
It is foundation with Al-Fe alloy phase diagrams, Mg-Al-Fe alloys is prepared using two-step method.It is most suitable for the processing of molten steel magnesium
Should Mg-Fe alloys, but solubility of the magnesium metal in iron liquid is very low (about 0.05% at 1600 DEG C), and solubility is more after solidification
It is low, it is difficult to form the Mg-Fe alloys with enough metal content of magnesium；It was found from Mg-Al alloy phase diagrams and Al-Fe alloy phase diagrams,
Al can form the alloy of arbitrary proportion with Mg and Fe respectively, that is to say, that using Al as medium, can prepare aluminium base Mg-Al-Fe conjunctions
Gold.
The preparation method of the molten steel magnesium processing slow-release magnesium alloy of the present invention, compared with prior art, has the beneficial effect that：
(1) preparation method of the present invention, molten steel is added with alloy form, appropriate Mg, Al, Fe content is controlled, to magnesium metal
With good dilution function, be advantageous to control dissolving, diffusion and the reaction of magnesium metal；
(2) in the magnesium alloy for preparing of the present invention metallic iron presence, you can to improve the fusion temperature of alloy, slow down metal
The release of magnesium, the density of alloy can be improved again, emersion molten steel is not easy during use and scaling loss.
Brief description of the drawings
The process chart of the preparation method of the molten steel magnesium processing slow-release magnesium alloy of Fig. 1 embodiment of the present invention.
Embodiment
The technological process of the preparation method of the molten steel magnesium processing slow-release magnesium alloy of following examples is as shown in Figure 1.
In following examples, the metal Al weighed meets remelting aluminium ingot standard GB/T/T 1196-2008, metal Al
From Al99.50bAnd above trade mark aluminium ingot；The metal Mg weighed meets primary magnesium ingot standard GB/T/T 3499-2011, gold
Category Mg selects Mg99.80 and above trade mark magnesium ingot；Metallic iron uses pure iron as raw material as raw material, meets ingot iron standard GB/T/T
9971-2004, and YT2 and the above trade mark are selected, specific composition is shown in Table 1：
The embodiment of table 1 selects raw metal and its chemical composition (mass percent, %)
Embodiment 1
A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy, Mg-Al-Fe alloys are prepared using two step method, specifically
It is as follows：
Step 1, prepared by Mg-Al alloys：
(1) raw material selection and burdening calculation：Matched by Mg-Al alloying component, weigh 75kg metal Al blocks and 79kg gold
Belong to Mg blocks；Wherein, the mass percent of Mg-Al alloying components is：Mg：50%, surplus is Al and inevitable impurity；Metal
Mg actual use amount is the 105% of Theoretical Mass；
(2) alloy smelting：
Using vaccum sensitive stove, after metal Mg and metal Al are cut into bulk, metal Mg blocks are placed on graphite crucible bottom
Portion, metal Al blocks gland is above metal Mg；
Vaccum sensitive stove is warming up to 950 DEG C, temperature-rise period vacuumizes, and when vacuum is less than or equal to 0.01atm, is filled with Ar
Gas makes to keep tiny structure in vacuum sky induction furnace to 0.85atm；
It is broken to be spaced apart lid after molten bath is formed, after quickly being stirred with molybdenum bar, it is poured into steel ingot die, after the demoulding
To Mg-Al alloys；
(3) alloy is processed：The oxide layer on Mg-Al alloy cast ingots surface is ground off using emery wheel, and it is standby to cut into fritter；
The chemical composition of Mg-Al alloy cast ingots is as shown in table 2；
Step 2, prepared by Mg-Al-Fe alloys：
(1) prepared by Al-Fe alloys：
Raw material chooses and burdening calculation：
Matched by Al-Fe alloying components, weigh 150kg metal Al and 150kg metals Fe；Wherein, Al-Fe alloying components
Mass percent is：Fe：50%, surplus is Al and inevitable impurity；
On the basis of Al-Fe alloy amounts, the addition of Mg-Al alloys is calculated, mixes Al-Fe alloys and Mg-Al alloys
The composition and its mass percent of the Mg-Al-Fe alloys obtained after melting be：15%Mg, 55%Al, surplus are Fe and can not kept away
The impurity exempted from；
Weigh 39kg Mg-Al alloy blocks；
(2) Al-Fe alloy smeltings：Using vacuum induction furnace smelting, metallic aluminium is placed on electrically molten magnesia crucible bottom,
Metallic iron iron is placed on above aluminium block；Feeding temperature-raising vacuumizes simultaneously, when vacuum reaches 0.01atm, is filled with Ar gas
0.85atm, make to keep tiny structure in vacuum sky induction furnace；Continue feeding temperature-raising to 1500 DEG C, aluminium is fused completely with iron；
(3) vaccum sensitive stove is had a power failure and is cooled to 1210 DEG C, holding alloy melt is liquid；It is broken to be spaced apart lid, carry out magnesium conjunction
Aurification operates, and is pricked using crooked chisel and takes Mg-Al alloy blocks, inserted in Al-Fe aluminium alloys and carry out alloying, so operate repeatedly, directly
To after the completion of alloying, power transmission stirring 2min, casting ingot-forming；
(4) alloy is processed：The oxide layer on ingot casting surface, Mg-Al-Fe alloyings manufactured in the present embodiment are ground off using emery wheel
It is as shown in table 3 to learn composition detection.
Mg-Al-Fe alloys press-stretched prepared by the present embodiment is broken into powdered granule, bag is packaged into using sheet iron
Cored wire, and carried out the molten steel magnesium processing commerical test of 3 heats, experiment steel grade is AH32.As a result show, core-spun yarn was fed
Cheng Pingwen, no molten steel splash and turns over phenomenon greatly, only in the faint light of core-spun yarn feeding position appearance；Molten steel composition meets steel grade
The control standard requirement studied point；After magnesium processing, nonmetallic inclusionsin steel is rotten abundant, is distributed in small and dispersed state, even
Cast panel base cleanliness factor significantly improves, total oxygen content average out to 11 × 10-6, more than 40% is reduced compared with Calcium treatment technique.This shows,
Prepared Mg-Al-Fe core-spun yarns have a good sustained release performance, and treatment effect is good.
Embodiment 2
A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy, Mg-Al-Fe alloys are prepared using two step method, specifically
It is as follows：
Step 1, prepared by Mg-Al alloys：
(1) raw material selection and burdening calculation：Matched by Mg-Al alloying component, weigh 45kg metal Al blocks and 11kg gold
Belong to Mg blocks；Wherein, the mass percent of Mg-Al alloying components is：Mg：70%, surplus is Al and inevitable impurity；；Gold
The quality for belonging to Mg is the 105% of Theoretical Mass；
(2) alloy smelting：
Using vaccum sensitive stove, after metal Mg and metal Al are cut into bulk, metal Mg blocks are placed on graphite crucible bottom
Portion, metal Al blocks gland is above metal Mg；
Vaccum sensitive stove is warming up to 950 DEG C, temperature-rise period vacuumizes, and when vacuum is less than or equal to 0.01atm, is filled with Ar
Gas makes to keep tiny structure in vaccum sensitive stove to 0.9atm；
It is broken to be spaced apart lid after molten bath is formed, quickly stirred with molybdenum bar, be poured into mould, Mg-Al is obtained after the demoulding
Alloy；
(3) alloy is processed：The oxide layer on Mg-Al alloy cast ingots surface is ground off using emery wheel, and it is standby to cut into fritter；
The chemical composition of Mg-Al alloy cast ingots is as shown in table 2；
Step 2, prepared by Mg-Al-Fe alloys：
(1) prepared by Al-Fe alloys：
Raw material chooses and burdening calculation：
Matched by Al-Fe alloying components, weigh 180kg metal Al and 120kg metals Fe；Wherein, Al-Fe alloying components
Mass percent is：Fe：40%, surplus is Al and inevitable impurity；
On the basis of Al-Fe alloy amounts, the addition of Mg-Al alloys is calculated, mixes Al-Fe alloys and Mg-Al alloys
The composition and its mass percent of the Mg-Al-Fe alloys obtained after melting be：10%Mg, 55%Al, surplus are Fe and can not kept away
The impurity exempted from；
Weigh 55kg Mg-Al alloy blocks；
(2) Al-Fe alloy smeltings：Using vacuum induction furnace smelting, metallic aluminium is placed on electrically molten magnesia crucible bottom,
Metallic iron iron is placed on above aluminium block；Feeding temperature-raising vacuumizes simultaneously, when vacuum is less than or equal to 0.01atm, is filled with Ar gas
To 0.9atm, make to keep tiny structure in vacuum sky induction furnace；Continue feeding temperature-raising to 1525 DEG C, aluminium is fused completely with iron；
(3) vacuum induction furnace smelting, power failure are cooled to 1230 DEG C, holding alloy melt is liquid；It is broken to be spaced apart lid, carry out
Magnesium alloy chemical operates, and is pricked using crooked chisel and takes Mg-Al alloy blocks, inserted in Al-Fe aluminium alloys and carry out alloying, so grasp repeatedly
Make, after the completion of alloying, power transmission stirring 2min, casting ingot-forming；
(4) alloy is processed：The oxide layer on ingot casting surface, Mg-Al-Fe alloyings manufactured in the present embodiment are ground off using emery wheel
It is as shown in table 3 to learn composition detection.
Mg-Al-Fe alloys press-stretched prepared by the present embodiment is broken into powdered granule, bag is packaged into using sheet iron
Cored wire, and carried out the molten steel magnesium processing commerical test of 5 heats, experiment steel grade is Q345B.As a result show, core-spun yarn feeding
Process is steady, no molten steel splash and turns over phenomenon greatly, only in the faint light of core-spun yarn feeding position appearance；Molten steel composition meets steel grade
The control standard requirement of chemical composition；After magnesium processing, nonmetallic inclusionsin steel is rotten abundant, is distributed in small and dispersed state,
Continuous casting steel billet cleanliness factor significantly improves, total oxygen content average out to 13 × 10-6, more than 35% is reduced compared with Calcium treatment technique.This table
Bright, prepared Mg-Al-Fe core-spun yarns have a good sustained release performance, and treatment effect is good.
Embodiment 3
A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy, Mg-Al-Fe alloys are prepared using two step method, specifically
It is as follows：
Step 1, prepared by Mg-Al alloys：
(1) raw material selection and burdening calculation：Matched by Mg-Al alloying component, weigh 60kg metal Al blocks and 95kg gold
Belong to Mg blocks；Wherein, the mass percent of Mg-Al alloying components is：Mg：60%, surplus is Al and inevitable impurity；；Gold
The quality for belonging to Mg is the 105% of Theoretical Mass；
(2) alloy smelting：
Using vaccum sensitive stove, after metal Mg and metal Al are cut into bulk, metal Mg blocks are placed on graphite crucible bottom
Portion, metal Al blocks gland is above metal Mg；
Vaccum sensitive stove is warming up to 950~1000 DEG C, temperature-rise period vacuumizes, when vacuum is less than or equal to 0.01atm,
Ar gas is filled with to 0.95atm, makes to keep tiny structure in vacuum sky induction furnace；
It is broken to be spaced apart lid after molten bath is formed, quickly stirred with molybdenum bar, be poured into mould, Mg-Al is obtained after the demoulding
Alloy；
(3) alloy is processed：The oxide layer on Mg-Al alloy cast ingots surface is ground off using emery wheel, and it is standby to cut into fritter；
The chemical composition of Mg-Al alloy cast ingots is as shown in table 2；
Step 2, prepared by Mg-Al-Fe alloys：
(1) prepared by Al-Fe alloys：
Raw material chooses and burdening calculation：
Matched by Al-Fe alloying components, weigh 180kg metal Al and 120kg metals Fe；Wherein, Al-Fe alloying components
Mass percent is：Fe：40%, surplus is Al and inevitable impurity；
On the basis of Al-Fe alloy amounts, the addition of Mg-Al alloys is calculated, mixes Al-Fe alloys and Mg-Al alloys
The composition and its mass percent of the Mg-Al-Fe alloys obtained after melting be：5%Mg, 53%Al, surplus are Fe and can not kept away
The impurity exempted from；
Weigh 105kgMg-Al alloys；
(2) Al-Fe alloy smeltings：Using vacuum induction furnace smelting, metallic aluminium is placed on electrically molten magnesia crucible bottom,
Metallic iron iron is placed on above aluminium block；Feeding temperature-raising vacuumizes simultaneously, when vacuum is less than or equal to 0.01atm, it is filled with Ar gas
To 0.95atm, make to keep tiny structure in vacuum sky induction furnace；Continue feeding temperature-raising to 1550 DEG C, aluminium is fused completely with iron；
(3) vacuum induction furnace smelting, power failure are cooled to 1190 DEG C, holding alloy melt is liquid；It is broken to be spaced apart lid, carry out
Magnesium alloy chemical operates, and is pricked using crooked chisel and takes Mg-Al alloy blocks, inserted in Al-Fe aluminium alloys and carry out alloying, so grasp repeatedly
Make, after the completion of alloying, power transmission stirring 2min, casting ingot-forming；
(4) alloy is processed：The oxide layer on ingot casting surface, Mg-Al-Fe alloyings manufactured in the present embodiment are ground off using emery wheel
It is as shown in table 3 to learn composition detection.
Mg-Al-Fe alloys press-stretched prepared by the present embodiment is broken into powdered granule, bag is packaged into using sheet iron
Cored wire, and carried out the molten steel magnesium processing commerical test of 6 heats, experiment steel grade is FH40.As a result show, core-spun yarn was fed
Cheng Pingwen, no molten steel splash and turns over phenomenon greatly, only in the faint light of core-spun yarn feeding position appearance；Molten steel composition meets steel grade
The control standard requirement studied point；After magnesium processing, nonmetallic inclusionsin steel is rotten abundant, is distributed in small and dispersed state, even
Cast panel base cleanliness factor significantly improves, total oxygen content average out to 10 × 10-6, more than 30% is reduced compared with Calcium treatment technique.This shows,
Prepared Mg-Al-Fe core-spun yarns have a good sustained release performance, and treatment effect is good.
Mg-Al alloy compositions (mass percent, %) prepared by the embodiment first step of table 2
Mg-Al-Fe alloy compositions (mass percent, %) prepared by the embodiment second step of table 3
Claims (3)
1. a kind of preparation method of molten steel magnesium processing slow-release magnesium alloy, it is characterised in that comprise the following steps：
Step 1, prepared by Mg-Al alloys：
(1) raw material selection and burdening calculation：Matched by Mg-Al alloying component, weigh metal Al and metal Mg；Wherein, Mg-Al
The mass percent of alloying component is：Mg：30~70%, surplus is Al and inevitable impurity；Metal Mg quality is reason
By the 105~110% of quality；
(2) alloy smelting：
Using vaccum sensitive stove, metal Mg is placed on graphite crucible bottom, metal Al glands are above metal Mg；By vacuum sense
Stove is answered to be warming up to 950~1000 DEG C, temperature-rise period vacuumizes, and when vacuum is less than or equal to 0.01atm, is filled with inert gas extremely
0.85~0.95atm；It is broken to be spaced apart lid after molten bath is formed, stirred, be poured into mould with molybdenum bar, Mg- is obtained after the demoulding
Al alloys；
(3) alloy is processed：The oxide layer of Mg-Al alloy surfaces is removed, it is standby；
Step 2, prepared by Mg-Al-Fe alloys：
(1) raw material selection and burdening calculation：
Matched by Al-Fe alloying components, weigh metal Al and metal Fe；Wherein, the mass percent of Al-Fe alloying components is：
Fe：20~50%, surplus Al；
On the basis of Al-Fe alloy amounts, the addition of Mg-Al alloys is calculated, makes Al-Fe alloys and Mg-Al alloy mixed smeltings
The composition and its mass percent of the Mg-Al-Fe alloys obtained afterwards be：1~35%Mg, 40~80%Al, surplus is for Fe and not
Evitable impurity；
Mg-Al alloys are weighed, wherein, the actual mass of Mg-Al alloys is the 105~110% of Theoretical Mass；
(2) Al-Fe alloy smeltings：Using vacuum induction furnace smelting, metallic aluminium is placed on electrically molten magnesia crucible bottom, by gold
Category iron is placed on above aluminium block；Feeding temperature-raising vacuumizes simultaneously, when vacuum is less than or equal to 0.01atm, is filled with inert gas extremely
0.85~0.95atm；Continue feeding temperature-raising to 1500~1550 DEG C, aluminium is fused completely with iron；
(3) Al-Fe alloys are cooled to 1100~1250 DEG C, holding alloy melt is liquid；Cooling method cools to have a power failure；It is broken
It is spaced apart lid, carries out magnesium alloy chemical operation, adds Mg-Al alloys into Al-Fe Alloys, after the completion of alloying, power transmission stirring 1
~2min, casting ingot-forming；
The method of addition Mg-Al alloys is wherein into Al-Fe Alloys：Pricked using crooked chisel and take Mg-Al alloy blocks, inserted
Alloying is carried out in Al-Fe aluminium alloys, is so operated repeatedly, until alloying is completed；
(4) alloy is processed：The oxide layer on ingot casting surface is removed after the demoulding, it is standby；
In described preparation method, the metal Al weighed meets remelting aluminium ingot standard GB/T/T 1196-2008, metal Al
From Al99.50bAnd above trade mark aluminium ingot；The metal Mg weighed meets primary magnesium ingot standard GB/T/T 3499-2011, gold
Category Mg selects Mg99.80 and above trade mark magnesium ingot；Metallic iron uses pure iron as raw material as raw material, meet ingot iron standard GB/T/
T9971-2004, and select YT2 and the above trade mark.
2. the preparation method of molten steel magnesium processing slow-release magnesium alloy according to claim 1, it is characterised in that described step
In rapid 1 (2), inert gas is Ar gas.
3. the preparation method of molten steel magnesium processing slow-release magnesium alloy according to claim 1, it is characterised in that described step
In rapid 1 (3) and step 2 (4), the oxide layer on ingot casting surface is ground off using emery wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610866175.XA CN106399771B (en) | 2016-09-30 | 2016-09-30 | A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610866175.XA CN106399771B (en) | 2016-09-30 | 2016-09-30 | A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106399771A CN106399771A (en) | 2017-02-15 |
| CN106399771B true CN106399771B (en) | 2017-12-01 |
Family
ID=59228152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610866175.XA Active CN106399771B (en) | 2016-09-30 | 2016-09-30 | A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106399771B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663058B (en) * | 2020-06-28 | 2021-06-01 | 沈阳航空航天大学 | Fe-Al alloy used as aluminum alloy additive and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385875A (en) * | 2007-09-12 | 2009-03-18 | 中国科学院金属研究所 | Complete degradable absorbent medicine slow-release magnesium alloy bracket and use thereof |
| CN104388786A (en) * | 2014-11-27 | 2015-03-04 | 重庆大学 | High-strength high-plasticity Mg-Zn-Al-Sn magnesium alloy |
| CN204600790U (en) * | 2015-04-16 | 2015-09-02 | 日照天一生物医疗科技有限公司 | Medicine slow-release magnesium alloy bracket |
-
2016
- 2016-09-30 CN CN201610866175.XA patent/CN106399771B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385875A (en) * | 2007-09-12 | 2009-03-18 | 中国科学院金属研究所 | Complete degradable absorbent medicine slow-release magnesium alloy bracket and use thereof |
| CN104388786A (en) * | 2014-11-27 | 2015-03-04 | 重庆大学 | High-strength high-plasticity Mg-Zn-Al-Sn magnesium alloy |
| CN204600790U (en) * | 2015-04-16 | 2015-09-02 | 日照天一生物医疗科技有限公司 | Medicine slow-release magnesium alloy bracket |
Non-Patent Citations (5)
| Title |
|---|
| 含镁、碱土金属复合合金的开发与炼钢应用（I）;张建良等;《铁合金》;20010430(第4期);1-7 * |
| 含镁、碱土金属复合合金的开发与炼钢应用（II）;闫占辉等;《铁合金》;20010531(第5期);7-13 * |
| 复合净化合金的研制及冶金应用效果;肖清安等;《炼钢》;20040630;第20卷(第3期);6-9 * |
| 镁钙基合金处理纯净材料的机理和物化性能;张建良等;《包头钢铁学院学报》;20021231;第21卷(第4期) * |
| 镁铝铁合金脱氧剂低温冶炼工业试验研究;闫吉辉等;《第十五届（2011年）冶金反应工程学会议论文集》;20111231;389-398 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106399771A (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1794335B1 (en) | Method of producing a copper-germanium-boron master alloy and its use in making silver-copper alloys | |
| MX2007012881A (en) | Method for adding boron to metal alloys. | |
| CN101457270B (en) | Method and device for preparing high quality high ferrotitanium alloy based on aluminothermy reduction | |
| JP5048222B2 (en) | Method for producing long ingots of active refractory metal alloys | |
| CN101698895B (en) | Low-cost preparation method for high-elongation ductile iron castings | |
| CN100478455C (en) | High-calcium non-silicon aluminium calcium magnesium ferrous alloy for steel-smelting deoxidization and method for preparing the same | |
| CN109295330B (en) | Method for refining nitride inclusions in nickel-based wrought superalloy | |
| CN100562591C (en) | Technology with smelting ferroferrite with sponge iron | |
| AU601342B2 (en) | Method of alloying aluminium | |
| CN112281006B (en) | Form regulation and control method for iron-rich phase in regenerated aluminum alloy | |
| US20230100820A1 (en) | Iron-aluminum alloy and preparation method therefor | |
| CN105603257B (en) | The production method of high-quality ferrotianium | |
| CN108950273B (en) | Intermediate alloy and preparation method and application thereof | |
| CA1082005A (en) | Alloy for rare earth treatment of molten metals | |
| CN102672146A (en) | Method for compositely refining solidification structure of magnesium alloy by combination of current and Zr | |
| CN106399771B (en) | A kind of preparation method of molten steel magnesium processing slow-release magnesium alloy | |
| CN105779869B (en) | The method of 30Mn circular pipe blank steel Inner Quality of Billet control | |
| CN104745845A (en) | Magnesium-contained nickel base alloy and preparation method of magnesium-contained nickel base alloy | |
| CN112501477A (en) | Micro-carbon low-sulfur high-aluminum iron-free aluminum-magnesium-calcium alloy deoxidizer and preparation method and application thereof | |
| CN102839292A (en) | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy | |
| CN102191356A (en) | Control method of inclusions in thick steel plate used for high heat input welding | |
| CN113186442B (en) | High-strength high-toughness high-entropy alloy and preparation method thereof | |
| CN111518990B (en) | Method for controlling alloy elements in free-cutting steel to be uniformly distributed | |
| CN113308614A (en) | ZM6 alloy refining method | |
| CN105779820B (en) | The production method of low impurity content ferrotianium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |