CN111826563B - Thermal cracking resistant casting material based on magnesium-calcium based alloy and preparation method thereof - Google Patents
Thermal cracking resistant casting material based on magnesium-calcium based alloy and preparation method thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 89
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 88
- 238000005266 casting Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000004227 thermal cracking Methods 0.000 title claims abstract description 21
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000011777 magnesium Substances 0.000 claims abstract description 43
- 239000011575 calcium Substances 0.000 claims abstract description 42
- 238000005336 cracking Methods 0.000 claims abstract description 38
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 6
- 239000012071 phase Substances 0.000 abstract description 24
- 230000005496 eutectics Effects 0.000 abstract description 20
- 229910000882 Ca alloy Inorganic materials 0.000 abstract description 16
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 14
- 230000035945 sensitivity Effects 0.000 abstract description 11
- 239000007791 liquid phase Substances 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 229910001278 Sr alloy Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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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Abstract
The invention discloses a thermal cracking resistant casting material based on a magnesium-calcium based alloy and a preparation method thereof, wherein the thermal cracking resistant casting material comprises the following components in percentage by mass: 0.5-1% of Ca, 0.4-1% of Sr, and the balance of magnesium and inevitable impurities. According to the invention, the addition amount of Sr element is accurately controlled, so that the brittle temperature interval of the magnesium-calcium alloy is reduced, the content of eutectic phase is increased, more liquid phase is fed in the final stage of solidification, and the hot cracking sensitivity of the alloy is reduced. The magnesium alloy prepared by the invention has the advantages of hot crack resistance, excellent mechanical property, favorable machinability, flowability and pressure casting property, and can meet the performance requirements of alloy castings developing towards light, thin and complex shapes. And the raw materials are simple and easy to obtain, no rare earth elements exist, the cost is greatly reduced, and the method has good application prospect and economic benefit.
Description
Technical Field
The invention relates to a preparation method of wrought alloy, in particular to a hot cracking resistant casting material based on magnesium-calcium based alloy and a preparation method thereof, belonging to the technical field of light alloy processing.
Background
The magnesium alloy is called as '21 century green engineering material' because of a series of advantages of small density, high specific strength, good thermal conductivity, good damping performance, good electromagnetic shielding performance and the like. Has very wide prospect in the fields of aviation industry, automobiles, motorcycles, optical instruments, mechanical equipment, electronic products and the like. However, the research finds that the commercial magnesium alloy has insufficient high-temperature strength and poor high-temperature creep resistance and can only be used below 150 ℃, which greatly limits the application.
Researches find that the addition of the calcium element can obviously refine the grain size of the magnesium alloy and improve the mechanical property of the alloy. And Mg is generated in the alloy due to the addition of calcium2Ca phase, Mg2The existence of the Ca phase can obviously improve the high-temperature performance and the creep property of the magnesium alloy. Further, since Ca has a lower potential than Mg, the corrosion resistance of the magnesium alloy is also improved. Therefore, in recent years, Mg-Ca alloys have received increasing attention. However, the hot cracking sensitivity of the magnesium alloy is also significantly increased by the addition of Ca. Particularly, when the mass fraction of Ca in the Mg-Ca alloy is 0.5 to 1 percent, the Mg-Ca alloy has very high heat cracking sensitivity, and casting parts are easy to generate heat cracks. Hot cracking is one of the most serious casting defects affecting the quality of magnesium alloy castings, and is always one of the focus problems concerned in the field of casting research, particularly when the magnesium alloy castings develop towards the directions of light weight, thinness and complex shape, stress concentration is easily generated in the magnesium alloy castings, and the hot cracking defects are generated. This not only results in the rejection of a large number of castings, but even severely limits the shape and size of the parts being designed. Therefore, how to reduce the hot cracking tendency in the casting process of the high-strength Mg-Ca magnesium alloy becomes a key problem to be solved urgently at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hot cracking resistant casting material based on a magnesium-calcium based alloy and a preparation method thereof, and solves the problems that the existing magnesium-calcium alloy with 0.5-1% of Ca content has serious hot cracking sensitivity and limits the application range of the existing magnesium-calcium alloy.
In order to solve the technical problems, the invention adopts the following technical scheme: a hot cracking resistant casting material based on a magnesium-calcium alloy, which consists of the following components in percentage by mass: 0.5-1% of Ca, 0.4-1% of Sr, and the balance of magnesium and inevitable impurities. Preferably, the hot cracking resistant casting material consists of the following components in percentage by mass: 0.5-1% of Ca, 0.7-1% of Sr, and the balance of magnesium and inevitable impurities.
Thus, Sr is added into the magnesium alloy with 0.5-1 percent of Ca, which plays a certain role in structure refinement, can coordinate the shrinkage stress generated in the solidification process to a certain extent, and relieves stress concentration, thereby reducing the hot cracking sensitivity. When the Sr content is 0.2-0.4%, the Sr content is lower, so that the Sr content has a certain effect of reducing the hot cracking sensitivity of the alloy, but the effect is not obvious; when the Sr content is 0.4-0.7%, the heat cracking sensitivity of the alloy can be obviously reduced, but very fine heat cracks can be generated at lower die temperature; when the Sr content is 0.7-1%, the content of the component is better, and the hot cracking tendency of the alloy is obviously reduced. When the Sr content is more than 1 percent, the calculation shows that the eutectic phase content of the alloy is not obviously increased and is basically maintained at about 6.2 percent, the effect of reducing the hot cracking tendency of the alloy is not changed more obviously, and the cost is increased by increasing the Sr content, so that the Sr content of less than 1 percent can sufficiently reduce the hot cracking tendency of the alloy.
Similar to the binary eutectic reaction of the binary Mg-Ca alloy, the ternary eutectic reaction of the Mg-Ca-Sr alloy can also occur, the addition of Sr increases the fraction of eutectic phase, and the eutectic phase can heal the generated thermal cracks, thereby reducing the thermal cracking tendency. Unlike Mg-Ca alloys which form liquid phases of Mg and Mg2Eutectic reaction of Ca, and liquid phase generation of Mg-Ca-Sr ternary alloy2Ca. Mg and Mg17Sr2The addition of Sr introduces new Mg17Sr2Phase, reduced hot cracking susceptibility.
Furthermore, 0.4-1% Sr is added into the alloy to make the brittle temperature range of the alloy gradually decrease from 67 ℃ of Mg-1Ca to 39 ℃ along with the increase of Sr. The reduction of the brittle temperature interval reduces the hot cracking tendency of the alloy. When the Sr content is more than 1%, the alloy has a narrow brittle temperature interval, and the eutectic phase content of the alloy is maintained at a relatively stable value, so that under 1% of Sr is enough to improve the hot cracking tendency of the alloy under the premise of considering the cost.
The invention also provides a preparation method of the thermal cracking resistant casting material based on the magnesium-calcium alloy, which comprises the following steps: and (3) calculating and batching according to the components of the anti-heat-cracking material, firstly melting a magnesium ingot in a resistance furnace under a protective atmosphere, adding other batching after pure magnesium is melted and the temperature is raised to 720 ℃ and stabilized, stirring and deslagging after the alloy is completely melted, standing, pouring the alloy into a mold, and cooling to room temperature to obtain the anti-heat-cracking casting material.
Further, the protective atmosphere is SF with a volume ratio of 1:496And CO2The mixed gas of (1).
Compared with the prior art, the invention has the following beneficial effects:
1. aiming at the problem of high hot cracking sensitivity of cast Mg-Ca alloy with the Ca content of 0.5-1%, the invention reduces the brittle temperature interval of the magnesium alloy and increases the eutectic phase content by accurately controlling the addition of Sr element, so that more liquid phases are fed in the final stage of solidification. In addition, the addition of Sr changes the type of a second phase, reduces a fragile temperature interval, refines an alloy structure and reduces the hot cracking sensitivity of the alloy, thereby solving the problem that the Mg-Ca cast alloy is easy to generate hot cracking, successfully developing the cast Mg-Ca-Sr alloy with low hot cracking tendency, and having good technical effect and obvious economic value and social value under the same condition.
2. The Mg-Ca-Sr alloy prepared by the invention has good heat cracking resistance, good fluidity and die casting performance, can meet the performance requirements of magnesium alloy castings on development towards light, thin and complex shapes, and has the advantages of simple process, strong operability, simple and easily obtained raw materials, no rare earth elements, greatly reduced cost and good application prospect.
Drawings
FIG. 1 is a macroscopic view of hot cracks of magnesium-calcium alloy castings with different Sr contents.
FIG. 2 shows the statistics of the brittle temperature range of Mg-1Ca-xSr alloy.
FIG. 3 shows the eutectic phase content statistics of Mg-1Ca-xSr alloy.
FIG. 4 is a microstructure diagram of cracks of Mg-Ca alloy with different Sr contents.
FIG. 5 is a scanning diagram of cracks of the Mg-Ca alloy with different Sr contents.
Detailed Description
The following examples further illustrate the present invention in detail.
Thermal cracking resistant casting material based on magnesium-calcium alloy
Example 1
1) Mechanically grinding a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy according to the proportion of Ca: 1%, Sr: and 0.4 percent of magnesium and the balance of inevitable impurities by mass percentage.
2) In CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 720 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, cooling to 680 ℃ to reduce the burning loss of Sr element, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) preserving the temperature for 20 min, and pouring the casting material into a CRC thermal cracking mold preheated to 350 ℃ to obtain the thermal cracking resistant casting material.
Example 2
1) Taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: 0.5 percent, and the balance of magnesium and inevitable impurities by mass percentage.
2) In CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 720 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, cooling to 680 ℃ to reduce the burning loss of Sr element, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
Example 3
1) Taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: and 0.6 percent of magnesium and the balance of inevitable impurities by mass percentage.
2) In CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 720 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, cooling to 680 ℃ to reduce the burning loss of Sr element, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
Example 4
1) Taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: 0.8 percent, and the balance of magnesium and inevitable impurities by mass percentage.
2) In CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 700 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, cooling to 680 ℃ to reduce the burning loss of Sr element, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
Example 5
1) Taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: 1 percent, and the balance of magnesium and inevitable impurities by mass percent.
2) In CO2+0.2%SF6Putting pure Mg into a crucible under the protection of (volume fraction) mixed gas, heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 700 ℃, and reducing the temperature after the alloy is completely moltenAdding Mg-25% Sr intermediate alloy after the temperature reaches 680 ℃, reducing the temperature to 680 ℃ so as to reduce the burning loss of Sr element, then stirring for 1 min at the speed of 80r/min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
Comparative example 1
The anti-heat cracking casting material comprises the following components in percentage by mass: ca: 1% and the balance magnesium and unavoidable impurities, the other steps being the same as in example 1.
Comparative example 2
The anti-heat cracking casting material comprises the following components in percentage by mass: ca: 1%, Sr: 0.2% and the balance magnesium and inevitable impurities, the other steps being the same as in example 1.
Second, performance verification
1. The cast materials obtained in the examples and comparative examples were observed, and their appearance characteristics and morphology are shown in FIG. 1.
As can be seen from FIG. 1, the Mg-Ca cast material having 0.5 to 1% Ca content has significant heat cracks without the addition of Sr; with the increase of Sr content, the hot cracking tendency of the casting material is reduced, namely the hot cracking is reduced; when the Sr content reaches 0.8%, the casting material has no obvious hot crack.
2. As a result of measuring the brittle temperature ranges of the cast materials of the examples and comparative examples, as shown in FIG. 2, it can be seen that when the Sr content of the alloy is 0.2%, the brittle temperature range of the alloy is about 68 ℃ which is not much different from that of the alloy to which Sr (Mg-1 Ca) is not added, and the brittle temperature range of the alloy is not significantly reduced, and it can be seen that 0.2Sr has no significant effect on the improvement of the hot cracking tendency of the alloy. When the Sr content in the alloy is 0.4 percent, the brittle temperature interval is 60 ℃; when the Sr content in the alloy is 0.6 percent, the brittle temperature interval is 56 ℃; when the Sr content in the alloy is 0.8 percent, the brittle temperature interval is 46 ℃; when the Sr content in the alloy is 1%, the brittle temperature interval is 39 ℃. Namely, the brittleness temperature interval of the alloy is obviously reduced along with the increase of the Sr content in the alloy, namely, the brittleness temperature interval of the alloy is obviously narrowed. Generally, the narrower the temperature zone of the alloy, the shorter the time the alloy stays in the zone, and the heat cracking sensitivity of the alloy is reduced.
2. The eutectic phase contents of the cast materials of the examples and comparative examples were measured, and the results are shown in FIG. 3. The eutectic phase content of the Mg-1Ca alloy is 5.3 percent, the eutectic phase content of the Mg-1Ca-0.2Sr is 0.6021 percent, the eutectic phase content of the Mg-1Ca-0.4Sr is 3.0292 percent, the eutectic phase content of the Mg-1Ca-0.6Sr is 6.4205 percent, the eutectic phase content of the Mg-1Ca-0.8Sr is 6.3250 percent, and the eutectic phase content of the Mg-1Ca-1Sr is 6.2555 percent, although the eutectic phase content of the Mg-1Ca-0.2Sr and the Mg-1Ca-0.4Sr is much less than that of the Mg-1Ca, the hot cracking tendency is improved to a certain extent due to the introduction of a new second phase, and then the eutectic phase content is increased along with the increase of the Sr content, so the hot cracking tendency of the alloy is rapidly improved.
3. When the cast materials prepared in the examples and the comparative examples are observed by a microscope, the microscopic morphologies of the cast materials are shown in fig. 4 and fig. 5, and it can be seen from fig. 4 that the grain boundary becomes coarse after Sr is added compared to comparative example 1, and the structure of the alloy becomes finer as the Sr content increases, indicating that the eutectic phase content at the grain boundary increases and the hot cracking tendency of the alloy improves. It can also be seen from the scan of fig. 5 that the eutectic phase content in the alloy increases after Sr addition.
In summary, the experimental results show that the solidification temperature range of the brittle region is narrowed (Delta) after 0.4-1% of Sr element is added into the Mg-Ca alloy with 0.5-1% of Ca contentT) The new second phase is introduced, and the structure is refined, so that the heat crack sensitivity (HTS) of the alloy is remarkably reduced, and the problem that the Mg-Ca cast alloy is easy to generate heat cracks is solved.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The hot cracking resistant casting material based on the magnesium-calcium based alloy is characterized by comprising the following steps:
1) taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: 0.8 percent of magnesium and the balance of inevitable impurities by mass percentage;
2) in CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 700 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
2. The hot cracking resistant casting material based on the magnesium-calcium based alloy is characterized by comprising the following steps:
1) taking a pure magnesium ingot, Mg-30% Ca intermediate alloy and Mg-25% Sr intermediate alloy as raw materials, mechanically polishing, and adding Ca: 1%, Sr: 0.6 percent of magnesium and the balance of inevitable impurities by mass percentage;
2) in CO2+0.2%SF6Putting pure Mg into a crucible under the protection of mixed gas (volume fraction), heating in a resistance furnace, adding Mg-30% Ca intermediate alloy into the molten pure Mg when the temperature of molten metal reaches 720 ℃, cooling to 680 ℃ after the alloy is completely molten, adding Mg-25% Sr intermediate alloy, cooling to 680 ℃ to reduce the burning loss of Sr element, stirring at the speed of 80r/min for 1 min, removing slag and standing; and (3) keeping the temperature for 20 min, pouring into a CRC thermal cracking mold heated to 350 ℃, and obtaining the thermal cracking resistant casting material.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376938A (en) * | 2008-10-10 | 2009-03-04 | 江苏大学 | Novel flame-retardant high-strength heat-resistant magnesium alloy and preparation thereof |
| CN101476072A (en) * | 2009-01-19 | 2009-07-08 | 湖南大学 | Temperature distortion resistant magnesium alloy containing Ca and Sr |
| CN102552973A (en) * | 2012-02-17 | 2012-07-11 | 浙江海圣医疗器械有限公司 | Medical degradable and absorbable Mg-Sr-Ca series magnesium alloy implant and preparation method thereof |
| CN105886866A (en) * | 2016-06-22 | 2016-08-24 | 重庆大学 | High-formability magnesium alloy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376938A (en) * | 2008-10-10 | 2009-03-04 | 江苏大学 | Novel flame-retardant high-strength heat-resistant magnesium alloy and preparation thereof |
| CN101476072A (en) * | 2009-01-19 | 2009-07-08 | 湖南大学 | Temperature distortion resistant magnesium alloy containing Ca and Sr |
| CN102552973A (en) * | 2012-02-17 | 2012-07-11 | 浙江海圣医疗器械有限公司 | Medical degradable and absorbable Mg-Sr-Ca series magnesium alloy implant and preparation method thereof |
| CN105886866A (en) * | 2016-06-22 | 2016-08-24 | 重庆大学 | High-formability magnesium alloy |
Non-Patent Citations (1)
| Title |
|---|
| Synthesis and characterization of Mg-Ca-Sr alloys for biodegradable orthopedic implant applications;Ida S. Berglund，et al.;《Journal of biomedical materials research B: applied biomaterials》;20120612;第1524-1534页 * |
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Effective date of registration: 20240228 Address after: Room 518, Dongyang Road Office, Liyang Road East Section, Development Zone, Hebi City, Henan Province, China Patentee after: Henan Magnesium Industry Co.,Ltd. Country or region after: China Address before: 400044 No. 174 Sha Jie street, Shapingba District, Chongqing Patentee before: Chongqing University Country or region before: China |
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