CN107723546A - The toughening magnesium alloy of running water fast erosion and its manufacture method of component - Google Patents
The toughening magnesium alloy of running water fast erosion and its manufacture method of component Download PDFInfo
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- CN107723546A CN107723546A CN201711017132.5A CN201711017132A CN107723546A CN 107723546 A CN107723546 A CN 107723546A CN 201711017132 A CN201711017132 A CN 201711017132A CN 107723546 A CN107723546 A CN 107723546A
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- running water
- magnesium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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Abstract
The invention belongs to technical field of metal material, discloses a kind of toughening magnesium alloy of running water fast erosion and its manufacture method of component；The magnesium alloy each component and its weight percent content are：The hybrid reactions such as Zn2.0 ~ 4.0%, Gd0 ~ 2.5%, Y0 ~ 1.0%, Cu0.4 ~ 1.0%, Ni, Fe, Ga, In promote element（MRAE）Or independent Ni total content 6.0 ~ 8.0%, it is surplus that wherein Ni, which accounts for MRAE total amounts not less than 95%, Mg, and impurity element Be, Zr, Ca total weight percent are less than 0.01%.Compared with prior art, the component manufactured using magnesium alloy of the present invention, can in running water fast erosion, under normal temperature in running water corrosion rate up to 40mg/cm2More than h, in the case where heating electrolyte conditions, corrosion rate reaches as high as 600 mg/cm2H, while preferable toughness is also equipped with, it is suitably applied the industrial circle for having fast erosion requirement to structural material, such as mining industry.
Description
Technical field
The present invention relates to the manufacture method of a kind of magnesium alloy of technical field of metal material and its component, specifically one
The toughening magnesium alloy of kind running water fast erosion and its manufacture method of component.
Background technology
Magnesium alloy has the characteristics of density is low, specific strength is high, there is relatively broad application in major industrial circle.It is another
Aspect, magnesium alloy be existing engineer applied structural material in chemical property it is more active, iing is required that structural material has quickly
The industrial circle of etching characteristic has preferable application prospect, such as mining machine.Although the chemical property of magnesium alloy is more active,
The corrosion rate of magnesium is not high enough under normal temperature, it is impossible to meets commercial Application demand.By alloyage process, the corrosion of magnesium alloy is improved
Speed, there is particularly important meaning.
Currently without the explanation or report for finding technology similar to the present invention, money similar both at home and abroad is also not yet searched
Material..
The content of the invention
It is an object of the invention to overcome the shortcomings of existing magnesium alloy materials, there is provided a kind of toughening of running water fast erosion
The manufacture method of magnesium alloy and its component.Described magnesium alloy addition higher proportion based on Ni, supplemented by Si, Fe, Ga, In
Hybrid reaction promotes element（MRAE）, strictly control Be, Zr, Ca etc. to suppress magnesium and the element ratio of water reaction, increase substantially
The corrosion rate of magnesium alloy, while the alloy elements such as Zn are added, optimization material eutectic structure and precipitation phase structure, realize material
And the component of manufacture can be in running water fast erosion, and ensure that material possesses certain obdurability.
The present invention is achieved by the following technical solutions.
First aspect：The present invention provides a kind of toughening magnesium alloy of running water fast erosion, includes component and weight percent
Than for：The hybrid reactions such as Zn2.0 ~ 4.0%, Gd0 ~ 2.5%, Y0 ~ 1.0%, Cu0.4 ~ 1.0%, Ni, Fe, Ga, In promote element
（MRAE）Or independent Ni total content 6.0 ~ 8.0%, it is surplus that wherein Ni, which accounts for MRAE total amounts not less than 95%, Mg, impurity element
Be, Zr, Ca total weight percent are less than 0.01%.
Second aspect, the present invention provide a kind of method for manufacturing component of the toughening magnesium alloy of the running water fast erosion,
The manufacture method specifically comprises the following steps.
Pretreatment：Magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, iron, gallium, indium are weighed by weight percentage
Deng raw material, wherein magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, iron preheating.
Smelting and pouring：Pretreated raw material are uniformly mixed, melting；Pour into a mould, cast after covering, refining treatment
Ingot.
Homogenization heat treatment：It is incubated a period of time at a certain temperature to the ingot casting.
Thermal deformation is processed：Thermal deformation processing is carried out at a certain temperature to the ingot casting, obtains forging or section bar.
Stress relief annealing is heat-treated：It is incubated a period of time at a certain temperature to the forging or section bar
Preferably, in the step of pretreatment, the temperature of the preheating is 200 DEG C, 8 hours time.
Preferably, in the step of smelting and pouring, the coverture used that covers is JDMF, the refining of the refining use
Agent is RJ2 or RJ5, and described pouring temperature is 680 ~ 700 DEG C.
Preferably, in the step of homogenization heat treatment, described heat-retaining condition is 6 ~ 10 hours at 400 ~ 420 DEG C.
Preferably, in thermal deformation procedure of processing, described heat distortion temperature be 380 ~ 400 DEG C, total deformation be 60% ~
95%。
Preferably, in stress relief annealing heat treatment step, described heat-retaining condition is 6 ~ 16 hours at 120 ~ 160 DEG C.
Compared with prior art, using magnesium alloy of the present invention manufacture component, can in running water fast erosion, often
Corrosion rate is up to 40mg/cm in the lower running water of temperature2More than h, in the case where heating electrolyte conditions, corrosion rate reaches as high as 600
mg/cm2H, while preferable toughness is also equipped with, the industrial circle for having fast erosion requirement to structural material is suitably applied,
Such as mining industry.
Embodiment
Embodiments of the invention are elaborated below：The present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and process, but protection scope of the present invention is not limited to following embodiments.
Embodiment 1
Manufacture percentage by weight is Mg-2.0%Zn-0.5%Y-0.4%Cu-6.0%Ni, and Mg is surplus, impurity element Be, Zr, Ca's
Total weight percent is less than 0.01%.Comprise the following steps.
Pre-treatment step：The raw material such as magnesium, magnesium yttrium intermediate alloy, zinc, copper, nickel are weighed by weight percentage, at 200 DEG C
Preheating 8 hours.
Smelting and pouring step：Recommendation uses crucible electrical resistance furnace melting, and addition coverture JDMF is covered, refining agent RJ2
Refining treatment is carried out, each alloying component is uniformly mixed, removal of inclusions, in 700 DEG C of cast, obtains ingot casting.
Homogenization heat treating step：Homogenization heat treatment is carried out to ingot casting at 400 DEG C, processing time is 10 hours.
Thermal deformation procedure of processing：Extrusion process is carried out to ingot casting at 390 DEG C, total deformation 95%, obtains extrudate.
Stress relief annealing heat treatment step：It is to extrudate progress stress relief annealing heat treatment, processing time at 120 DEG C
16 hours.
Corrosion rate is 46mg/cm to the magnesium alloy and its component of the present embodiment manufacture in running water at normal temperatures2H, 92
Corrosion rate is 310mg/cm in 3%KCl water under the conditions of DEG C2·h.Mechanical property can reach tensile strength Rm>=220MPa,
Elongation after fracture A >=4.5%.
Embodiment 2
The magnesium alloy component that percentage by weight is Mg-3.0%Zn-1.0%Gd-1.0%Y-0.6%Cu-7.0% MRAE is manufactured, wherein
97%, the Mg that Ni accounts for MRAE total amounts is surplus, and impurity element Be, Zr, Ca total weight percent are less than 0.01%.Including following step
Suddenly.
Pre-treatment step：Weigh by weight percentage magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, iron,
The raw material such as gallium, indium, wherein magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, preheated 8 hours at 200 DEG C.
Smelting and pouring step：Recommendation uses crucible electrical resistance furnace melting, and addition coverture JDMF is covered, refining agent RJ5
Refining treatment is carried out, each alloying component is uniformly mixed, removal of inclusions, in 690 DEG C of cast, obtains ingot casting.
Homogenization heat treating step：Homogenization heat treatment is carried out to ingot casting at 410 DEG C, processing time is 8 hours.
Thermal deformation procedure of processing：Forging processing is carried out to ingot casting at 400 DEG C, total deformation 60%, obtains forging.
Stress relief annealing heat treatment step：Stress relief annealing heat treatment is carried out to forging at 140 DEG C, processing time is 10 small
When.
Corrosion rate is 55mg/cm to the magnesium alloy and its component of the present embodiment manufacture in running water at normal temperatures2H, 92
Corrosion rate is 420mg/cm in 3%KCl water under the conditions of DEG C2·h.Mechanical property can reach tensile strength Rm>=240MPa,
Elongation after fracture A >=4.5%.
Embodiment 3
The magnesium alloy component that percentage by weight is Mg-4.0%Zn-2.5%Gd-1.0%Cu-8.0% MRAE is manufactured, wherein Ni is accounted for
95%, Mg of MRAE total amounts is surplus, and impurity element Be, Zr, Ca total weight percent are less than 0.01%.Comprise the following steps.
Pre-treatment step：The raw material such as magnesium, magnesium gadolinium intermediate alloy, zinc, copper, nickel, iron, gallium, indium are weighed by weight percentage,
Wherein magnesium, magnesium gadolinium intermediate alloy, zinc, copper, nickel, preheated 8 hours at 200 DEG C.
Smelting and pouring step：Recommendation uses crucible electrical resistance furnace melting, and addition coverture JDMF is covered, refining agent RJ5
Refining treatment is carried out, each alloying component is uniformly mixed, removal of inclusions, in 680 DEG C of cast, obtains ingot casting.
Homogenization heat treating step：Homogenization heat treatment is carried out to ingot casting at 420 DEG C, processing time is 6 hours.
Thermal deformation procedure of processing：Extrusion process is carried out to ingot casting at 380 DEG C, total deformation 80%, obtains extrudate.
Stress relief annealing heat treatment step：It is to extrudate progress stress relief annealing heat treatment, processing time at 160 DEG C
6 hours.
Corrosion rate is 64mg/cm to the magnesium alloy and its component of the present embodiment manufacture in running water at normal temperatures2H, 92
Corrosion rate is 600mg/cm in 3%KCl water under the conditions of DEG C2·h.Mechanical property can reach tensile strength Rm>=260MPa,
Elongation after fracture A >=4.5%.
Comparative example 1
This comparative example is the comparative example of embodiment 1, and this comparative example is related to a kind of magnesium alloy, and difference from Example 1 is only in institute
State magnesium alloy and promote element without any reaction of Ni, Fe, Ga, In.
The component of this comparative example magnesium alloy manufacture does not possess the ability of running water fast erosion, even if being placed on high-temperature electrolysis
Also faint reaction can only be observed in matter solution.
Comparative example 2
This comparative example is the comparative example of embodiment 2, and this comparative example is related to a kind of magnesium alloy, and difference from Example 2 is only in institute
State magnesium alloy and be free of Gd, Y, Zn, Cu.
This comparative example magnesium alloy manufacture component possesses the ability of running water fast erosion, but component is brittle serious, it is difficult to forges
Shape is caused, even if forging and molding, component elongation after fracture A also only 1% or so, industrial requirements can not be met.
Comparative example 3
This comparative example is the comparative example of embodiment 3, and this comparative example is related to a kind of magnesium alloy, and difference from Example 3 is only in institute
State Ni contents in magnesium alloy and only account for the 10% of MRAE total amounts.
This comparative example magnesium alloy manufacture component does not possess the ability of running water fast erosion, it is necessary to could be real using electrolyte
The corrosion of existing faster rate, corrosion rate also can only achieve 110 mg/cm in 3%KCl water under the conditions of 92 DEG C2H, can not
Meet the requirement of high velocity erosion.
The specific embodiment and comparative example of the present invention are described above.It is to be appreciated that not office of the invention
It is limited to above-mentioned particular implementation, the various changes and modifications made within the scope of the claims, has no effect on reality of the invention
Matter content.
Claims (7)
1. a kind of toughening magnesium alloy of running water fast erosion, it is characterised in that be comprising component and percentage by weight：Zn2.0~
The hybrid reactions such as 4.0%, Gd0 ~ 2.5%, Y0 ~ 1.0%, Cu0.4 ~ 1.0%, Ni, Fe, Ga, In promote element（MRAE）Or independent Ni
Total content 6.0 ~ 8.0%, it is surplus that wherein Ni, which accounts for MRAE total amounts not less than 95%, Mg, impurity element Be, Zr, Ca gross weight
Measure percentage and be less than 0.01%.
A kind of 2. method for manufacturing component of the toughening magnesium alloy of running water fast erosion described in claim 1, it is characterised in that institute
Manufacture method is stated to comprise the following steps：
Pretreatment：The originals such as magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, iron, gallium, indium are weighed by weight percentage
Material, wherein magnesium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, zinc, copper, nickel, iron preheating；
Smelting and pouring：Pretreated raw material are uniformly mixed, melting；Poured into a mould after covering, refining treatment, obtain ingot casting；
Homogenization heat treatment：It is incubated a period of time at a certain temperature to the ingot casting；
Thermal deformation is processed：Thermal deformation processing is carried out at a certain temperature to the ingot casting, obtains forging or section bar.
Stress relief annealing is heat-treated：It is incubated a period of time at a certain temperature to the forging or section bar.
3. the method for manufacturing component of the toughening magnesium alloy of the running water fast erosion according to right 2, it is characterised in that pre- place
In the step of reason, the temperature of the preheating is 200 DEG C, 8 hours time.
4. the method for manufacturing component of the toughening magnesium alloy of the running water fast erosion according to right 2, it is characterised in that melting
In the step of cast, the coverture used that covers is JDMF, and the refining agent used that refines is RJ6, described cast
Temperature is 660 ~ 680 DEG C.
5. the method for manufacturing component of the toughening magnesium alloy of the running water fast erosion according to right 2, it is characterised in that uniformly
In the step of changing heat treatment, described heat-retaining condition is 6 ~ 10 hours at 400 ~ 420 DEG C.
6. the method for manufacturing component of the toughening magnesium alloy of the running water fast erosion according to right 2, it is characterised in that thermal change
In the step of shape is processed, described thermal deformation technique method is hot forging or hot extrusion, and heat distortion temperature is 380 ~ 400 DEG C, total to become
Shape amount is 60% ~ 95%.
7. the method for manufacturing component of the toughening magnesium alloy of the running water fast erosion according to right 2, it is characterised in that going should
In the step of power annealing heat-treats, described heat-retaining condition is 6 ~ 16 hours at 120 ~ 160 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441658A (en) * | 2018-03-05 | 2018-08-24 | 北京易联结科技发展有限公司 | A kind of high-strength magnesium alloy and preparation method thereof with medium fast reaction |
| CN109161769A (en) * | 2018-10-30 | 2019-01-08 | 北京科技大学 | A kind of functional quickly solvable rare earth magnesium alloy material and preparation method thereof |
| CN113061790A (en) * | 2021-03-16 | 2021-07-02 | 西安交通大学 | Mg-Zn-Ni ternary magnesium alloy material with wide corrosion rate range |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392165A (en) * | 2011-12-28 | 2012-03-28 | 东北大学 | Wrought magnesium alloy with high intensity and method for preparing its extruded material |
| CN102747261A (en) * | 2011-04-19 | 2012-10-24 | 株式会社神户制钢所 | Magnesium alloy material and engine part |
| CN105950931A (en) * | 2016-07-20 | 2016-09-21 | 肖旅 | High-strength and high-hardness magnesium alloy in controllable reaction with water, and manufacturing method of component thereof |
| CN106119647A (en) * | 2016-08-27 | 2016-11-16 | 冉兴 | High-strength magnesium alloy and the manufacture method of component thereof with water generation controllable reaction |
| CN106756368A (en) * | 2016-11-11 | 2017-05-31 | 重庆睿容环保科技有限公司 | A kind of metallic composite of high-ductility |
-
2017
- 2017-10-26 CN CN201711017132.5A patent/CN107723546A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747261A (en) * | 2011-04-19 | 2012-10-24 | 株式会社神户制钢所 | Magnesium alloy material and engine part |
| CN102392165A (en) * | 2011-12-28 | 2012-03-28 | 东北大学 | Wrought magnesium alloy with high intensity and method for preparing its extruded material |
| CN105950931A (en) * | 2016-07-20 | 2016-09-21 | 肖旅 | High-strength and high-hardness magnesium alloy in controllable reaction with water, and manufacturing method of component thereof |
| CN106119647A (en) * | 2016-08-27 | 2016-11-16 | 冉兴 | High-strength magnesium alloy and the manufacture method of component thereof with water generation controllable reaction |
| CN106756368A (en) * | 2016-11-11 | 2017-05-31 | 重庆睿容环保科技有限公司 | A kind of metallic composite of high-ductility |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441658A (en) * | 2018-03-05 | 2018-08-24 | 北京易联结科技发展有限公司 | A kind of high-strength magnesium alloy and preparation method thereof with medium fast reaction |
| CN109161769A (en) * | 2018-10-30 | 2019-01-08 | 北京科技大学 | A kind of functional quickly solvable rare earth magnesium alloy material and preparation method thereof |
| CN113061790A (en) * | 2021-03-16 | 2021-07-02 | 西安交通大学 | Mg-Zn-Ni ternary magnesium alloy material with wide corrosion rate range |
| CN113061790B (en) * | 2021-03-16 | 2022-05-06 | 西安交通大学 | Mg-Zn-Ni ternary magnesium alloy material with wide corrosion rate range |
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Inventor after: Ran Xing Inventor after: He Yinghui Inventor after: Wang Xiaohua Inventor after: Liu Qiang Inventor after: Qian Kang Inventor after: Ma Liang Inventor after: Zhang Zhou Inventor after: Zhou Jianhua Inventor before: Ran Xing Inventor before: Hu Yi Inventor before: He Yinghui Inventor before: Wang Xiaohua Inventor before: Liu Qiang Inventor before: Qian Kang Inventor before: Ma Liang Inventor before: Zhang Zhou Inventor before: Zhou Jianhua Inventor before: Tang Tingji |
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