CN113416868A - Novel modification treatment method for zinc-aluminum alloy - Google Patents
Novel modification treatment method for zinc-aluminum alloy Download PDFInfo
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Abstract
The invention relates to the technical field of Zn-6Al zinc-aluminum alloy, and discloses a novel modification treatment method of zinc-aluminum alloy. Firstly, carrying out high-temperature modification treatment on a high-temperature Zn-6Al alloy melt by using an Al-5Ti-B modifier, and then carrying out indirect modification treatment on a low-temperature Zn-6Al alloy melt by using the modified high-temperature Zn-6Al alloy melt, wherein the mass ratio of the high-temperature melt to the low-temperature melt is 1: 4-1: 1. The method of indirect modification treatment of the low-temperature alloy melt by partial high-temperature modification melt can improve the microstructure of Zn-6Al zinc alloy and prepare a zinc-aluminum alloy product with higher comprehensive mechanical property.
Description
Technical Field
The invention relates to a die-casting zinc-aluminum alloy, in particular to a novel modification treatment method of a zinc-aluminum alloy.
Background
The zinc alloy has good fluidity, filling capability and mechanical property, and is widely applied to the fields of automobile industry, household appliances, daily hardware, electromechanical equipment, instruments, cultural and sports toys and the like. With the industrial optimization of national enterprises, the automobile industry, infrastructure and household appliance industry are rapidly developed, and the demand of China on zinc alloy is rapidly increased. At present, China is a world with large zinc production and consumption, but the quality and the use performance of die-casting zinc alloy products produced in China are still different from those of zinc alloys of the same type in developed countries abroad, and the difference is concentrated on that the die-casting zinc alloy components in China are unstable and have more impurities, so that the product performance is greatly influenced, and enterprises using the zinc alloy to produce high-precision products in China still need to rely on a large number of imports to meet the requirements.
At present, the industry mainly adopts the precise control of alloy components to improve the purity of the alloy, optimize various modification treatment methods, fusion casting process parameters, strengthen the degassing and deslagging of zinc alloy liquid and the like to improve the comprehensive mechanical property of the zinc alloy. In the conventional modification process, the alloy melt is generally modified and then is poured after being appropriately stood.
The patent of 'a method for preparing high-silicon aluminum alloy by combining liquid-liquid mixed casting with composite modification' (patent number is CN201910666312.9) reports a modification treatment method for high-silicon aluminum alloy, wherein a composite modifier is firstly adopted to modify Al-35Si alloy high-temperature melt, and then the modified Al-35Si alloy melt is mixed with Al-20Si alloy low-temperature melt to obtain the high-silicon aluminum alloy with fine primary silicon uniformly distributed. The method has three characteristics: firstly, a composite alterant is adopted to perform alteration treatment on Al-Si alloy high-temperature melt, and the melting point of the alterant is obviously lower than the temperature of the altered Al-Si alloy melt; secondly, the quality of the high-temperature melt is obviously greater than that of the low-temperature melt; and thirdly, the components of the high-temperature Al-Si alloy melt are completely different from those of the low-temperature Al-Si alloy melt. The invention patent of Wangzhongqing et Al, "a method for improving the refining effect of Zn-Al-Ti-C/B master alloy" (patent number CN201210423591.4) adopts Zn-Al-Ti-C/B to modify ZA27 or Zn50Al high-temperature melt, and then mixes the modified melt with preheated solid zinc alloy with the same components, thereby achieving the purpose of improving the refining effect of Zn-Al-Ti-C/B master alloy. During the modification treatment, the Zn-Al-Ti-C/B intermediate alloy is a special modifier for the zinc alloy with low melting point.
For the zinc alloy, due to the low smelting temperature, if the Al-5Ti-B alterant with high melting point is adopted to modify the zinc alloy melt, the phenomenon that the alterant is difficult to melt and the modification effect of the zinc alloy is poor can occur. In order to overcome the defects, the invention firstly adopts Al-5Ti-B alterant to carry out high-temperature alteration treatment on a small amount of zinc alloy melt, and then carries out indirect alteration treatment on the altered high-temperature zinc alloy liquid on the zinc alloy melt at normal smelting temperature. The novel modification treatment process can improve the modification effect of the zinc-aluminum alloy and has higher popularization and application values in industrial production.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a novel zinc-aluminum alloy modification treatment method, so that the microstructure of the zinc alloy is improved, and the mechanical property of the zinc alloy is improved.
The adopted technical scheme is as follows:
according to the invention, a small amount of Zn-6Al high-temperature modified melt subjected to Al-5Ti-B modification treatment is adopted, and then a large amount of zinc alloy melt at normal smelting temperature is subjected to indirect modification treatment by using a small amount of modified high-temperature zinc alloy liquid, so that the microstructure of the zinc-aluminum alloy is improved, the comprehensive mechanical property of the zinc-aluminum alloy is improved, and finally the modification treatment of the low-melting-point alloy liquid by using the high-melting-point modifier is realized.
Further, the Zn-6Al high-temperature melt modification treatment process comprises the following steps: carrying out high-temperature modification treatment on the Zn-6Al alloy melt at the temperature of 600 ℃ by adopting an Al-5Ti-B modifier with the mass of 0.5 wt.% of the total melt; then indirectly modifying the Zn-6Al alloy melt at 430 ℃ by using the Zn-6Al alloy part high-temperature melt modified by the Al-5 Ti-B.
The mass ratio of the high-temperature melt to the low-temperature melt is 1: 1-4, so that the modification treatment effect of the zinc alloy is improved.
The invention has the beneficial effects that:
according to the invention, firstly, the high-melting-point Al-5Ti-B is adopted to modify part of the high-temperature Zn-6Al alloy melt, so that the problem that the high-melting-point Al-5Ti-B modifier is difficult to melt is solved; and the normally smelted Zn-6Al alloy melt is subjected to indirect modification treatment by adopting the modified high-temperature Zn-6Al alloy melt, so that the modification treatment effect of the zinc alloy is improved. The invention adopts a two-step modification treatment method to solve the problem that the high-melting point modifier is difficult to melt, and compared with the whole direct high-temperature modification treatment, the invention not only reduces the components, but also obviously improves the modification treatment effect, and has wide application prospect in the industrial production of high-performance zinc alloy.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a photograph showing the melting process of a zinc-aluminum alloy in a low-temperature modification treatment in comparative example 1.
FIG. 2 is a photograph of the microstructure of a cross section of a zinc-aluminum alloy test piece of comparative example 1.
FIG. 3 is a photograph of the microstructure of a cross section of a zinc-aluminum alloy test piece of comparative example 2.
FIG. 4 is a photograph of the microstructure of a cross section of a zinc-aluminum alloy test piece of example 1.
FIG. 5 is a photograph of the microstructure of a cross section of a zinc-aluminum alloy test piece of example 2.
FIG. 6 is a photograph of the microstructure of a cross section of a zinc-aluminum alloy test piece of example 3.
FIG. 7 is a photograph of the microstructure of a cross section of a specimen of a zinc-aluminum alloy of example 4.
Detailed Description
The invention is described in more detail below with reference to the following examples:
comparative example 1
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting in a resistance furnace at 600 ℃ to obtain the Zn-6% Al alloy ingots for later use.
Step 2, smelting and modifying zinc-aluminum alloy
The prepared Zn-6Al alloy raw material is put into a graphite crucible to be heated to 430 ℃ along with a furnace, when the alloy begins to soften, covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after the Zn-6Al alloy raw material is completely melted and heated to 430 ℃, the alloy is modified by adopting Al-5Ti-B modifier with the total melt mass of 0.5 percent, before casting, the melt is fully stirred by graphite rods to prevent component segregation, and hexachloroethane is adopted to carry out degassing refining on the melt.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
When the Zn-6Al alloy is subjected to modification treatment by adopting the Al-5Ti-B modifier with 0.5 wt.% of the total mass of the melt, the Al-5Ti-B modifier does not have obvious melting phenomenon after the Al-5Ti-B modifier is added for 30min, as shown in figure 1. The microstructure of the Zn-6Al alloy is shown in figure 2, and the microstructure comprises a primary beta-Al phase (black) and a lamellar eutectic structure of beta-Al and eta-Zn, wherein the primary aluminum phase is dendritic crystal. The Zn-6Al alloy obtained in comparative example 1 had a tensile strength of 267.3MPa, a yield strength of 227.3MPa, and an elongation of 1.2%.
Comparative example 2
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting in a resistance furnace at 600 ℃ to obtain the Zn-6% Al alloy ingots for later use.
Step 2, smelting and modifying zinc-aluminum alloy
The prepared Zn-6Al alloy raw material is put into a sintered graphite crucible and heated to 600 ℃ along with a furnace, when the alloy begins to soften, a covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after the Zn-6Al alloy raw material is completely melted and heated to 600 ℃, the alloy is modified by adopting an Al-5Ti-B modifying agent with the total melt mass of 0.5 percent, the melt is fully stirred by a graphite rod before casting to prevent the component segregation, and the melt is degassed and refined by adopting hexachloroethane.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
The microstructure of the Zn-6Al alloy is shown in figure 3, the microstructure comprises primary beta-Al phase (black) and beta-Al and eta-Zn lamellar eutectic structures, the primary aluminum phase is separated out in a plum blossom shape and is irregular in shape, the tensile strength of the Zn-6Al alloy prepared in the comparative example is only 190MPa, and compared with the mechanical property of the comparative example 1, the mechanical property is greatly reduced, and the main reason is that the suction reaction is violent in the high-temperature smelting process, so that the number of inclusions in the casting rod is large, and the tensile strength of the Zn-6Al alloy is reduced.
Example 1
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting in a resistance furnace at 600 ℃ to obtain the Zn-6% Al alloy ingots for later use.
Step 2, smelting and modifying zinc-aluminum alloy
380 g of Zn-6Al alloy ingot is divided into two parts according to the mass ratio of 1:4, the two parts of Zn-6Al alloy ingot are respectively put into different graphite crucibles and heated to 600 ℃ and 430 ℃ along with the furnace, wherein the less part is smelted at the high temperature of 600 ℃, and the more part is smelted at the low temperature of 430 ℃. When the Zn-6Al alloy begins to be softened, covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after a small part of the Zn-6Al alloy is completely melted and the temperature is raised to 600 ℃, the Al-5Ti-B alterant with the mass of 0.5 percent of the total melt mass is used for carrying out alteration treatment, and after the Al-5Ti-B alterant is melted, the altered Zn-6Al alloy high-temperature melt is rapidly poured into the Zn-6Al alloy low-temperature melt which is smelted at 430 ℃ for carrying out indirect alteration treatment. And in the modification process, a preheated graphite rod is adopted to stir the melt, and hexachloroethane is adopted to carry out degassing refining on the melt.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
The microstructure of the modified Zn-6Al alloy is shown in FIG. 4, and the microstructure is composed of primary beta-Al phase (black) and lamellar eutectic structure of beta-Al and eta-Zn, the number of primary aluminum phases is increased compared with the comparative example, and the structure morphology is transformed from dendritic crystal orientation equiaxed crystal. The Zn-6Al alloy prepared in this example had a tensile strength of 291.3MPa, a yield strength of 242.4MPa, and an elongation of 1.4%. Compared with the alloy prepared in the comparative example 1, the tensile strength and the elongation of the Zn-6Al alloy prepared by the novel modification treatment process are respectively improved by 9 percent and 17 percent.
Example 2
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting in a resistance furnace at 600 ℃ to obtain the Zn-6% Al alloy ingots for later use.
Step 2, smelting and modifying zinc-aluminum alloy
380 g of Zn-6Al alloy ingot is divided into two parts according to the mass ratio of 3:7, the two parts of Zn-6Al alloy ingot are respectively put into different graphite crucibles and heated to 600 ℃ and 430 ℃ along with the furnace, wherein the less part is smelted at the high temperature of 600 ℃, and the more part is smelted at the low temperature of 430 ℃. When the Zn-6Al alloy begins to be softened, covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after a small part of the Zn-6Al alloy is completely melted and the temperature is raised to 600 ℃, the Al-5Ti-B alterant with the mass of 0.5 percent of the total melt mass is used for carrying out alteration treatment, and after the Al-5Ti-B alterant is melted, the altered Zn-6Al alloy high-temperature melt is rapidly poured into the Zn-6Al alloy low-temperature melt which is smelted at 430 ℃ for carrying out indirect alteration treatment. And in the modification process, a preheated graphite rod is adopted to stir the melt, and hexachloroethane is adopted to carry out degassing refining on the melt.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
The microstructure of the modified Zn-6Al alloy is shown in FIG. 5, and the microstructure thereof is composed of a primary β -Al phase (black) and a lamellar eutectic structure of β -Al and η -Zn, the number of primary aluminum phases is increased as compared with example 1, and the primary aluminum phases are equiaxed and have slightly increased sizes. The Zn-6Al alloy prepared in the embodiment has the tensile strength of 293.5MPa, the yield strength of 247.3 MPa and the elongation of 1.4 percent. The mechanical properties of the alloy prepared in example 2 are substantially equivalent to those of the alloy prepared in example 1.
Example 3
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting in a resistance furnace at 600 ℃ to obtain the Zn-6% Al alloy ingots for later use.
Step 2, smelting and modifying zinc-aluminum alloy
380 g of Zn-6Al alloy ingot is divided into two parts according to the mass ratio of 2:3, the two parts of Zn-6Al alloy ingot are respectively put into different graphite crucibles and heated to 600 ℃ and 430 ℃ along with the furnace, wherein the less part is smelted at the high temperature of 600 ℃, and the more part is smelted at the low temperature of 430 ℃. When the Zn-6Al alloy begins to be softened, covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after a small part of the Zn-6Al alloy is completely melted and the temperature is raised to 600 ℃, the Al-5Ti-B alterant with the mass of 0.5 percent of the total melt mass is used for carrying out alteration treatment, and after the Al-5Ti-B alterant is melted, the altered Zn-6Al alloy high-temperature melt is rapidly poured into the Zn-6Al alloy low-temperature melt which is smelted at 430 ℃ for carrying out indirect alteration treatment. And in the modification process, a preheated graphite rod is adopted to stir the melt, and hexachloroethane is adopted to carry out degassing refining on the melt.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
The microstructure of the modified Zn-6Al alloy is shown in FIG. 6, and the microstructure comprises primary beta-Al phase (black) and lamellar eutectic structure of beta-Al and eta-Zn, the number of primary aluminum phases is obviously increased compared with that of example 2, the primary aluminum phases are equiaxed and the sizes of the primary aluminum phases are also reduced. The Zn-6Al alloy prepared in this example had a tensile strength of 305.9MPa, a yield strength of 255.4MPa, and an elongation of 1.7%. Compared with the comparative example 1, the tensile strength and the elongation of the alloy are respectively improved by 14 percent and 41 percent after the novel modification treatment process is adopted, and the modification effect of the alloy is good.
Example 4
Step 1, zinc-aluminum alloy batching: the method is characterized in that industrial pure aluminum (99.9%) and ZX01 alloy ingots (3.9-4.3 wt.% of Al, 0.03-0.06 wt.% of Mg, no copper and the balance of zinc) are adopted as raw materials. Calculating the use amount of industrial pure aluminum and ZX01 alloy ingots according to the Zn-6% Al alloy components, weighing by adopting a Mettler XS105 electronic balance, and smelting the alloy ingots with Zn-6% Al in a resistance furnace at 600 ℃ for later use.
Step 2, smelting and modifying zinc-aluminum alloy
380 g of Zn-6Al alloy ingot is divided into two parts according to the mass ratio of 1:1, the two parts of Zn-6Al alloy ingot are respectively put into different graphite crucibles and heated to 600 ℃ and 430 ℃ along with the furnace, wherein the less part is smelted at the high temperature of 600 ℃, and the more part is smelted at the low temperature of 430 ℃. When the Zn-6Al alloy begins to be softened, covering agent with the thickness of about 1mm is spread on the surface of the alloy to reduce the air suction reaction in the smelting process, after a small part of the Zn-6Al alloy is completely melted and the temperature is raised to 600 ℃, the Al-5Ti-B alterant with the mass of 0.5 percent of the total melt mass is used for carrying out alteration treatment, and after the Al-5Ti-B alterant is melted, the altered Zn-6Al alloy high-temperature melt is rapidly poured into the Zn-6Al alloy low-temperature melt which is smelted at 430 ℃ for carrying out indirect alteration treatment. And in the modification process, a preheated graphite rod is adopted to stir the melt, and hexachloroethane is adopted to carry out degassing refining on the melt.
Step 3, tapping and casting
And pouring the Zn-6Al alloy liquid into a metal mold with the room temperature and the inner cavity size of phi 12 multiplied by 120mm to obtain the required alloy sample. The mechanical properties of the alloy are tested according to GB-T228-2002 (metal tensile test) by adopting a standard sample with the gauge length size of phi 6 multiplied by 25 mm.
The microstructure of the modified Zn-6Al alloy is shown in FIG. 7, and the microstructure comprises primary beta-Al phase (black) and lamellar eutectic structures of beta-Al and eta-Zn, the number of primary aluminum phases is obviously increased compared with that of example 3, most of the primary aluminum phases are in equiaxial crystal shape, and a small amount of dendritic crystals appear.
The Zn-6Al alloy prepared in this example had a tensile strength of 314.5MPa, a yield strength of 266.7MPa and an elongation of 1.1%. The tensile strength of the alloy is improved by nearly 20% and the tensile strength of the alloy is improved as compared to comparative example 1.
The mechanical properties of the above examples and comparative examples are shown in Table 1
TABLE 1 mechanical Properties test data for Zn-Al alloys
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by the equivalent replacement or change of the technical solution and its concept of the present invention within the technical scope of the present invention.
Claims (4)
1. A novel modification treatment method for zinc-aluminum alloy is characterized by comprising the following steps: carrying out high-temperature modification treatment on the Zn-6Al alloy high-temperature melt by adopting Al-5Ti-B, carrying out indirect modification treatment on the Zn-6Al alloy low-temperature melt by using the modified Zn-6Al alloy high-temperature melt, and then casting the modified Zn-6Al alloy high-temperature melt into a room-temperature metal mold to cool the modified Zn-6Al alloy high-temperature melt to room temperature, thereby preparing the Zn-6Al alloy product with higher mechanical property.
2. The method of modifying a zinc-aluminum alloy according to claim 1, wherein: and (3) carrying out high-temperature modification treatment on the high-temperature Zn-6Al alloy melt at the temperature of 600 ℃ by adopting an Al-5Ti-B modifier with the total melt mass of 0.5 wt.%.
3. The method of modifying a zinc-aluminum alloy according to claim 1, wherein: the Zn-6Al alloy melt subjected to high-temperature modification is subjected to indirect modification treatment on the Zn-6Al alloy melt at the low temperature of 430 ℃, the mass ratio of the high-temperature melt to the low-temperature melt is 1: 1-4, and the high-temperature melt accounts for 20-50% of the total weight of the melt.
4. The method of modifying a zinc-aluminum alloy according to claim 1, wherein: pouring the high-temperature modified Zn-6Al alloy melt into the low-temperature Zn-6Al alloy melt at 430 ℃ for indirect modification treatment, and directly casting and molding without stopping.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190018A (en) * | 2007-02-07 | 2008-08-21 | Univ Of Tsukuba | ZnPd BASED PARTICULATE, AND METHOD FOR PRODUCING THE SAME |
| CN102433452A (en) * | 2011-12-26 | 2012-05-02 | 常州大学 | Reverse modification treatment method of ZZnAl4Y die-casting zinc alloy |
| CN103866160A (en) * | 2014-02-26 | 2014-06-18 | 常州大学 | Method for modifying zinc alloy by using Al-Ti-B-RE alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008190018A (en) * | 2007-02-07 | 2008-08-21 | Univ Of Tsukuba | ZnPd BASED PARTICULATE, AND METHOD FOR PRODUCING THE SAME |
| CN102433452A (en) * | 2011-12-26 | 2012-05-02 | 常州大学 | Reverse modification treatment method of ZZnAl4Y die-casting zinc alloy |
| CN103866160A (en) * | 2014-02-26 | 2014-06-18 | 常州大学 | Method for modifying zinc alloy by using Al-Ti-B-RE alloy |
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