CN107739958B - A kind of high-entropy alloy and preparation method thereof containing eutectic structure - Google Patents
A kind of high-entropy alloy and preparation method thereof containing eutectic structure Download PDFInfo
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Abstract
The invention discloses a kind of high-entropy alloys containing eutectic structure, comprising: by FCC phase and Cr9Mo21Ni20The CoCrFeNiMo of composed lamellar eutectic structure0.6~1.2；Wherein, CoCrFeNiMo0.6The tissue of alloy is hypoeutectic structure, CoCrFeNiMo0.8The tissue of alloy is eutectic structure, CoCrFeNiMo and CoCrFeNiMo1.2The tissue of alloy is hypereutectic tissue.Meanwhile the invention also discloses a kind of preparation method of high-entropy alloy containing eutectic structure, include the following steps: Step 1: weighing raw material Co, Cr, Fe, Ni and Mo elemental metals, and be 1:1:1:1:0.6~1.2 according to molar ratio computing；Step 2: the elemental metals are put into vacuumize process after smelting furnace and are filled with protection gas；Step 3: the alloy after elemental metals described in energization melting are melted after removal residual oxygen；Step 4: alloy cooling is obtained the high-entropy alloy；Wherein, the elemental metals are placed sequentially in smelting furnace from the bottom up from low to high according to fusing point.
Description
Technical field
The present invention relates to field of alloy material, and in particular to a kind of to contain the high-entropy alloy of eutectic structure and its preparation side
Method.
Background technique
Since high-entropy alloy is mentioned so far for the first time, obtain more and more concerns also obtained a large amount of research at
Fruit.As high temperature coatings, super high-entropy alloy, the low-density high-entropy alloy that can apply to aviation field, radiation hardness material,
Low temperature structure material etc..But this metal material of high-entropy alloy is primarily due to such there is presently no being widely used
Alloy often or only high-intensitive or only high-ductility, is difficult that it is made to possess the two characteristics, and component segregation simultaneously
It is to put the other two big difficulties before high-entropy alloy application surface with castability difference.
Have lot of advantages in the eutectic alloy that conventional metals field is used widely: 1) tissue of near-equilibrium state can
To sustain the temperature of up to eutectic point；2) low phase boundary energy；3) tissue is controllable；4) high breaking strength；5) stable defect knot
Structure；6) good Properties of High Temperature Creep；7) sheet or ROD EUTECTIC tissue in good order of arranging are capable of forming In-situ reaction
Material；As soon as simultaneously as eutectic reaction is an isothermal transformation, so solidification temperature range is not present, so also with regard to same
When reduce segregation and shrinkage cavity.
If it is possible to produce FCC phase (Face Centered Cubic, face-centred cubic structure) and another hard
The eutectic high-entropy alloy combined, then this alloy can possess excellent mechanical performance and casting character simultaneously；This energy
It is enough to help to clear away obstruction of the high-entropy alloy encountered in industrial processes；Then, scholar proposes a kind of new high entropy
Alloy concept-eutectic high-entropy alloy.At present, it has been reported that eutectic high-entropy alloy ingredient have AlCoCrFeNi2.1、
CoFeNi2V0.5Nb7.5、CoFeNi1.4VMo、CoFeNiVMo0.6、Al1.2CrCuFeNi2Deng.
Summary of the invention
The present invention has designed and developed a kind of high-entropy alloy containing eutectic structure, goal of the invention of the invention be by adjusting
The content of Mo element and then the institutional framework for adjusting high-entropy alloy, and then the mechanical performance of alloy is adjusted, improve high-entropy alloy
Mobility and castability.
The present invention has designed and developed a kind of preparation method of high-entropy alloy containing eutectic structure, goal of the invention of the invention
It is to provide a kind of preparation method for preparing containing eutectic structure, with excellent comprehensive performance high-entropy alloy system.
Technical solution provided by the invention are as follows:
A kind of high-entropy alloy containing eutectic structure, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 0.6~1.2.
Preferably, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 0.6.
Preferably, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: 1.2 are calculated in molar ratio as.
Preferably, Co, Cr, Fe, Ni and Mo purity are all larger than 99.8%.
A kind of preparation method of the high-entropy alloy containing eutectic structure, includes the following steps:
It Step 1: weighing raw material Co, Cr, Fe, Ni and Mo elemental metals, and is 1:1:1:1:0.6 according to molar ratio computing
~1.2；
Step 2: the elemental metals are put into vacuumize process after smelting furnace and are filled with protection gas；
Step 3: the alloy after elemental metals described in energization melting are melted after removal residual oxygen；
Step 4: alloy cooling is obtained the high-entropy alloy；
Wherein, the elemental metals are placed sequentially in smelting furnace from the bottom up from low to high according to fusing point.
Preferably, in said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are 1:1 according to molar ratio computing:
1:1:0.6；
In said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are 1:1:1:1:0.8 according to molar ratio computing；
In said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are 1:1:1:1:1 according to molar ratio computing；Or
Person
In said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are 1:1:1:1:1.2 according to molar ratio computing.
Preferably, in the step 2, the protection gas is argon gas, and vacuum degree is 5 in the smelting furnace
×10-3The protection gas is filled with when Pa.
Preferably, in the step 3, removal residual oxygen includes:
The smelting furnace includes the first melting pond and the second melting pond；
Pure titanium ingot is added in first melting pond, the elemental metals are added in second melting pond, into
Pure titanium ingot described in energization melting is carried out to first melting pond before elemental metals described in row energization melting, for removing residual
Oxygen.
Preferably, in the step 3, the elemental metals energization melting is first drawn using the electric current of 60~70A
Arc, then with electric current 60~120s of melting of 200~300A, obtain ingot casting；
By the ingot overturning, then with electric current 60~120s of melting of 200~300A, and it is repeated 6 times.
Preferably, in the step 3, pure titanium ingot described in energization melting is carried out to first melting pond and uses 200
Electric current 60~120s of melting of~300A, and repeat 2~3 times.
The present invention compared with prior art possessed by the utility model has the advantages that
1, preparation method simple process of the present invention is stablized, designed according to this invention and preparation containing eutectic structure
CoCrFeNiMoxHigh-entropy alloy system, and before and have not been reported；
2、CoCrFeNiMo0.6The tissue of alloy is hypoeutectic structure, has excellent synthesis compression performance, compression strength
For 2062MPa, compression ratio 17.5%；CoCrFeNiMo0.8The tissue of alloy is eutectic structure, has preferable comprehensive compression
Performance, compression strength 2240MPa, compression ratio 8.5%；CoCrFeNiMo and CoCrFeNiMo1.2The tissue of alloy was total
Crystalline substance tissue, has high-intensitive, high rigidity, but plasticity is poor；
3, the present invention can be synthesized with the high-intensitive CoCrFeNiMo with high rigidity1.2High-entropy alloy, this alloy resist
Compressive Strength reaches 2382Mpa, and hardness reaches 762.8HV.
Detailed description of the invention
Fig. 1 is high-entropy alloy CoCrFeNiMo of the present inventionxXRD spectrum.
Fig. 2 is high-entropy alloy CoCrFeNiMo of the present invention0.6Stereoscan photograph.
Fig. 3 is high-entropy alloy CoCrFeNiMo of the present invention0.8Stereoscan photograph.
Fig. 4 is the stereoscan photograph of high-entropy alloy CoCrFeNiMo of the present invention.
Fig. 5 is high-entropy alloy CoCrFeNiMo of the present invention1.2Stereoscan photograph.
Fig. 6 is high-entropy alloy CoCrFeNiMo of the present invention0.6~1.2Load-deformation curve；(x=0.6；0.8；
1；1.2；).
Fig. 7 is high-entropy alloy CoCrFeNiMo of the present invention0.6~1.2Vickers hardness curve；(x=0.6；0.8；1；
1.2；).
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It there is no eutectic CoCrFeNiMo at presentxThe report of serial high-entropy alloy, the present invention is high for high-entropy alloy fusing point, flows
The status that dynamic property is poor, hardly possible is cast, intensity and plasticity can not cooperate very well, is designed in conjunction with eutectic alloy theory and high-entropy alloy ingredient
Theory, design and be prepared for containing high intensity, high rigidity, with excellent comprehensive performance, by FCC phase and Cr9Mo21Ni20Institute's group
At lamellar eutectic structure CoCrFeNiMoxHigh-entropy alloy system, to solve high-entropy alloy fusing point height, mobility
The problem of difference, difficult casting；And can be by adjusting the content of Mo element, and then the institutional framework of alloy is adjusted, so as to
The combination for realizing intensity and plasticity, there is huge application value in engineering.
Therefore, the present invention provides a kind of high-entropy alloys containing eutectic structure, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 0.6~1.2.
In another embodiment, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 0.6.
In another embodiment, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 0.8.
In another embodiment, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: it is calculated in molar ratio as 1.
In another embodiment, comprising:
Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: 1.2 are calculated in molar ratio as.
In another embodiment, Co, Cr, Fe, Ni and Mo purity are all larger than 99.8%.
The present invention also provides a kind of preparation methods of high-entropy alloy containing eutectic structure, include the following steps:
It Step 1: weighing raw material Co, Cr, Fe, Ni and Mo elemental metals, and is 1:1:1:1:0.6 according to molar ratio computing
~1.2；
Step 2: the elemental metals are put into vacuumize process after smelting furnace and are filled with protection gas；
Step 3: the alloy after elemental metals described in energization melting are melted after removal residual oxygen；
Step 4: alloy cooling is obtained the high-entropy alloy；
Wherein, the elemental metals are placed sequentially in smelting furnace from the bottom up from low to high according to fusing point.
In another embodiment, in said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are according to molar ratio
It is calculated as 1:1:1:1:0.6.
In another embodiment, in said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are according to molar ratio
It is calculated as 1:1:1:1:0.8.
In another embodiment, in said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are according to molar ratio
It is calculated as 1:1:1:1:1.
In another embodiment, in said step 1, raw material Co, Cr, Fe, Ni and Mo elemental metals are according to molar ratio
It is calculated as 1:1:1:1:1.2.
In another embodiment, in the step 2, the protection gas is argon gas, and true in the smelting furnace
Reciprocal of duty cycle is 5 × 10-3The protection gas is filled with when Pa.
In another embodiment, in the step 3, removal residual oxygen includes:
The smelting furnace includes the first melting pond and the second melting pond；
Pure titanium ingot is added in first melting pond, the elemental metals are added in second melting pond, into
Pure titanium ingot described in energization melting is carried out to first melting pond before elemental metals described in row energization melting, for removing residual
Oxygen.
In another embodiment, in the step 3,60~70A's is first used to the elemental metals energization melting
Current arc ignition, then with electric current 60~120s of melting of 200~300A, obtain ingot casting；
By the ingot overturning, then with electric current 60~120s of melting of 200~300A, and it is repeated 6 times.
In another embodiment, in the step 3, pure titanium described in energization melting is carried out to first melting pond
Ingot uses electric current 60~120s of melting of 200~300A, and repeats 2~3 times.
High-entropy alloy of the invention is further described below with reference to specific embodiment.
Embodiment 1
Stock
Prepare Co, Cr, Fe, Ni, Mo simple substance pure metal raw material, purity be greater than 99.8%, and by biggish bulk, plate,
Band, bar etc. are cut into lesser bulk easy to use, bar etc.；Raw material is weighed by equimolar ratio: Co:Cr:Fe:Ni:Mo
=1:1:1:1:0.6；
Melting
Raw metal gross mass is 25g after weighing, by load weighted raw metal WK- П type non-consumable vacuum melting furnace
Melting is carried out, suction cast copper model cavity is diameter 6mm cylinder, has in water jacketed copper crucible and inhales cast copper mold device and cast pump phase with inhaling
Even；Specifically comprise the following steps:
Step 1: pure titanium ingot is put into a melting pond of water cooled copper mould, then will weighed raw material Co, Cr in stock,
Fe, Ni, Mo are put into another melting pond of water cooled copper mould, according to each material melting point height, by material melting point from low to high from
Under be up sequentially placed, bell is covered after Material Containment, tightens sample room knob；
Step 2: being 5 × 10 in vacuum degree to melting stove evacuation-3The argon gas of 1 atmospheric pressure is filled with when Pa；
Step 3: step 2 is repeated 2 times；
Step 4: melt back titanium ingot 2 times~3 times under conditions of melting electric current is 200A~300A, each melting 60s
~120s, to remove residual oxygen；
Step 5: the current arc ignition of 60~70A, then high current is first used to be placed on into 200~300A melting step one
Co, Cr, Fe, Ni, Mo material 60s~120s in another melting pond of water cooled copper mould, obtains ingot casting；
Step 6: ingot casting obtained in step 5 is overturn, then in the condition that melting electric current is 200A~300A
Lower melting 60s~120s；
Step 7: step 6 is repeated 6 times, with uniform alloy ingredient；
Step 8: opening suction casting pump, by the alloy sucking mold cavity of fusing, to the cooling taking-up of mold, obtain cylindric
Sample is just successfully prepared alloy bar.
Embodiment 2
Stock
Prepare Co, Cr, Fe, Ni, Mo simple substance pure metal raw material, purity be greater than 99.8%, and by biggish bulk, plate,
Band, bar etc. are cut into lesser bulk easy to use, bar etc.；Raw material is weighed by equimolar ratio: Co:Cr:Fe:Ni:Mo
=1:1:1:1:0.8；
Melting
Raw metal gross mass is 25g after weighing, by load weighted raw metal WK- П type non-consumable vacuum melting furnace
Melting is carried out, suction cast copper model cavity is diameter 6mm cylinder, has in water jacketed copper crucible and inhales cast copper mold device and cast pump phase with inhaling
Even；Specifically comprise the following steps:
Step 1: pure titanium ingot is put into a melting pond of water cooled copper mould, then will weighed raw material Co, Cr in stock,
Fe, Ni, Mo are put into another melting pond of water cooled copper mould, according to each material melting point height, by material melting point from low to high from
Under be up sequentially placed, bell is covered after Material Containment, tightens sample room knob；
Step 2: being 5 × 10 in vacuum degree to melting stove evacuation-3The argon gas of 1 atmospheric pressure is filled with when Pa；
Step 3: step 2 is repeated 2 times；
Step 4: melt back titanium ingot 2 times~3 times under conditions of melting electric current is 200A~300A, each melting 60s
~120s, to remove residual oxygen；
Step 5: the current arc ignition of 60~70A, then high current is first used to be placed on into 200~300A melting step one
Co, Cr, Fe, Ni, Mo material 60s~120s in another melting pond of water cooled copper mould, obtains ingot casting；
Step 6: ingot casting obtained in step 5 is overturn, then in the condition that melting electric current is 200A~300A
Lower melting 60s~120s；
Step 7: step 6 is repeated 6 times, with uniform alloy ingredient；
Step 8: opening suction casting pump, by the alloy sucking mold cavity of fusing, to the cooling taking-up of mold, obtain cylindric
Sample is just successfully prepared alloy bar.
Embodiment 3
Stock
Prepare Co, Cr, Fe, Ni, Mo simple substance pure metal raw material, purity be greater than 99.8%, and by biggish bulk, plate,
Band, bar etc. are cut into lesser bulk easy to use, bar etc.；Raw material is weighed by equimolar ratio: Co:Cr:Fe:Ni:Mo
=1:1:1:1:1；
Melting
Raw metal gross mass is 25g after weighing, by load weighted raw metal WK- П type non-consumable vacuum melting furnace
Melting is carried out, suction cast copper model cavity is diameter 6mm cylinder, has in water jacketed copper crucible and inhales cast copper mold device and cast pump phase with inhaling
Even；Specifically comprise the following steps:
Step 1: pure titanium ingot is put into a melting pond of water cooled copper mould, then will weighed raw material Co, Cr in stock,
Fe, Ni, Mo are put into another melting pond of water cooled copper mould, according to each material melting point height, by material melting point from low to high from
Under be up sequentially placed, bell is covered after Material Containment, tightens sample room knob；
Step 2: being 5 × 10 in vacuum degree to melting stove evacuation-3The argon gas of 1 atmospheric pressure is filled with when Pa；
Step 3: step 2 is repeated 2 times；
Step 4: melt back titanium ingot 2 times~3 times under conditions of melting electric current is 200A~300A, each melting 60s
~120s, to remove residual oxygen；
Step 5: the current arc ignition of 60~70A, then high current is first used to be placed on into 200~300A melting step one
Co, Cr, Fe, Ni, Mo material 60s~120s in another melting pond of water cooled copper mould, obtains ingot casting；
Step 6: ingot casting obtained in step 5 is overturn, then in the condition that melting electric current is 200A~300A
Lower melting 60s~120s；
Step 7: step 6 is repeated 6 times, with uniform alloy ingredient；
Step 8: opening suction casting pump, by the alloy sucking mold cavity of fusing, to the cooling taking-up of mold, obtain cylindric
Sample is just successfully prepared alloy bar.
Embodiment 4
Stock
Prepare Co, Cr, Fe, Ni, Mo simple substance pure metal raw material, purity be greater than 99.8%, and by biggish bulk, plate,
Band, bar etc. are cut into lesser bulk easy to use, bar etc.；Raw material is weighed by equimolar ratio: Co:Cr:Fe:Ni:Mo
=1:1:1:1:1.2；
Melting
Raw metal gross mass is 25g after weighing, by load weighted raw metal WK- П type non-consumable vacuum melting furnace
Melting is carried out, suction cast copper model cavity is diameter 6mm cylinder, has in water jacketed copper crucible and inhales cast copper mold device and cast pump phase with inhaling
Even；Specifically comprise the following steps:
Step 1: pure titanium ingot is put into a melting pond of water cooled copper mould, then will weighed raw material Co, Cr in stock,
Fe, Ni, Mo are put into another melting pond of water cooled copper mould, according to each material melting point height, by material melting point from low to high from
Under be up sequentially placed, bell is covered after Material Containment, tightens sample room knob；
Step 2: being 5 × 10 in vacuum degree to melting stove evacuation-3The argon gas of 1 atmospheric pressure is filled with when Pa；
Step 3: step 2 is repeated 2 times；
Step 4: melt back titanium ingot 2 times~3 times under conditions of melting electric current is 200A~300A, each melting 60s
~120s, to remove residual oxygen；
Step 5: the current arc ignition of 60~70A, then high current is first used to be placed on into 200~300A melting step one
Co, Cr, Fe, Ni, Mo material 60s~120s in another melting pond of water cooled copper mould, obtains ingot casting；
Step 6: ingot casting obtained in step 5 is overturn, then in the condition that melting electric current is 200A~300A
Lower melting 60s~120s；
Step 7: step 6 is repeated 6 times, with uniform alloy ingredient；
Step 8: opening suction casting pump, by the alloy sucking mold cavity of fusing, to the cooling taking-up of mold, obtain cylindric
Sample is just successfully prepared alloy bar.
Experimental result
The present invention is by high-entropy alloy, in conjunction with eutectic solidification theory, designs and be prepared for CoCrFeNiMox high-entropy alloy
System；Wherein, alloying element Co, Cr, Fe, Ni, Mo in molar ratio 1:1:1:1:x (wherein, x=0.6,0.8,1.0,1.2) into
Row proportion, matching obtained high-entropy alloy by this has high-intensitive, high rigidity and excellent comprehensive mechanical property, such as the institute of Fig. 1~7
Show, Examples 1 to 4 is tested, the tissue of CoCrFeNiMo0.6 alloy is hypoeutectic structure, with excellent comprehensive pressure
Contracting performance, compression strength 2062MPa, compression ratio 17.5%；The tissue of CoCrFeNiMo0.8 alloy is eutectic structure, tool
There are preferable comprehensive compression performance, compression strength 2240MPa, compression ratio 8.5%；CoCrFeNiMo and CoCrFeNiMo1.2
The tissue of alloy is hypereutectic tissue, has high-intensitive, high rigidity, but plasticity is poor；CoCrFeNiMo1.2High-entropy alloy, resistance to compression
Intensity reaches 2382Mpa, and hardness reaches 762.8HV；The organizational composition that alloy is controlled by adjusting the content of Mo element in alloy, can
To obtain the perfect combination of intensity and plasticity, there is huge application value in engineering.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (6)
1. a kind of high-entropy alloy containing hypereutectic tissue, which is characterized in that
By: Co: being calculated in molar ratio as 1,
Cr: being calculated in molar ratio as 1,
Fe: being calculated in molar ratio as 1,
Ni: being calculated in molar ratio as 1,
Mo: 1.2 compositions are calculated in molar ratio as.
2. a kind of preparation method of the high-entropy alloy containing hypereutectic tissue, which comprises the steps of:
It Step 1: weighing raw material Co, Cr, Fe, Ni and Mo elemental metals, and is 1:1:1:1:1.2 according to molar ratio computing；
Step 2: the elemental metals are put into vacuumize process after smelting furnace and are filled with protection gas；
Step 3: the alloy after elemental metals described in energization melting are melted after removal residual oxygen；
Step 4: alloy cooling is obtained the high-entropy alloy；
Wherein, the elemental metals are placed sequentially in smelting furnace from the bottom up from low to high according to fusing point.
3. the preparation method of the high-entropy alloy containing hypereutectic tissue as claimed in claim 2, which is characterized in that in the step
In rapid two, the protection gas is argon gas, and vacuum degree is 5 × 10 in the smelting furnace-3The protection gas is filled with when Pa.
4. the preparation method of the high-entropy alloy containing hypereutectic tissue as claimed in claim 2 or claim 3, which is characterized in that in institute
It states in step 3, removal residual oxygen includes:
The smelting furnace includes the first melting pond and the second melting pond；
Pure titanium ingot is added in first melting pond, the elemental metals are added in second melting pond, are being led to
Pure titanium ingot described in energization melting is carried out to first melting pond before elemental metals described in electric smelting, for removing residual oxygen
Gas.
5. the preparation method of the high-entropy alloy containing hypereutectic tissue as claimed in claim 4, which is characterized in that in the step
In rapid three, the current arc ignition of 60~70A, then the electric current melting with 200~300A are first used the elemental metals energization melting
60~120s obtains ingot casting；
By the ingot overturning, then with electric current 60~120s of melting of 200~300A, and it is repeated 6 times.
6. the preparation method of the high-entropy alloy containing hypereutectic tissue as claimed in claim 5, which is characterized in that in the step
In rapid three, electric current 60~120s of melting that pure titanium ingot described in energization melting uses 200~300A is carried out to first melting pond,
And it repeats 2~3 times.
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| CN108950349B (en) * | 2018-07-27 | 2020-06-26 | 西安理工大学 | CoFeNi2VZrx eutectic high-entropy alloy and preparation method thereof |
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