CN108707803A - A kind of VW93M nanometer Mgs alloy aging heat treatment process - Google Patents
A kind of VW93M nanometer Mgs alloy aging heat treatment process Download PDFInfo
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- CN108707803A CN108707803A CN201810740439.6A CN201810740439A CN108707803A CN 108707803 A CN108707803 A CN 108707803A CN 201810740439 A CN201810740439 A CN 201810740439A CN 108707803 A CN108707803 A CN 108707803A
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- 230000032683 aging Effects 0.000 title claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 title claims abstract description 10
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 44
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 230000001550 time effect Effects 0.000 claims abstract 4
- 238000005728 strengthening Methods 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process 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
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 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
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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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
Description
技术领域technical field
本发明涉及纳米材料制备领域，特别涉及一种纳米镁合金时效热处理工艺。The invention relates to the field of nano material preparation, in particular to a nano magnesium alloy aging heat treatment process.
背景技术Background technique
纳米材料由于其优异的物理性能、化学性能以及力学性能已被应用于诸多高科技领域，也渗透到生活的各个方面。纳米镁合金不仅具有普通镁合金具有的高阻尼、高比强、高比刚等优点，还具有高强度和良好的耐蚀性能。大多数镁合金都属于时效强化型合金，因而通过时效热处理进一步提高纳米镁合金强度是提升镁合金力学性能的重要手段。Nanomaterials have been used in many high-tech fields due to their excellent physical, chemical and mechanical properties, and have penetrated into all aspects of life. Nano-magnesium alloys not only have the advantages of high damping, high specific strength, and high specific rigidity that ordinary magnesium alloys have, but also have high strength and good corrosion resistance. Most magnesium alloys are age-strengthened alloys, so further improving the strength of nano-magnesium alloys through aging heat treatment is an important means to improve the mechanical properties of magnesium alloys.
发明内容Contents of the invention
本发明目的在于提供一种VW93M纳米镁合金时效热处理工艺，所述镁合金质量百分比成分为Mg-8.0~9.6Gd-1.8~3.2Y-0.3~0.7Zr-0.02~0.5Ag-0.02~0.3Er，包括以下具体步骤：The object of the present invention is to provide a VW93M nano-magnesium alloy aging heat treatment process, the mass percentage composition of the magnesium alloy is Mg-8.0~9.6Gd-1.8~3.2Y-0.3~0.7Zr-0.02~0.5Ag-0.02~0.3Er, Include the following specific steps:
a． 将镁合金棒材进行旋锻变形，控制旋锻温度为100~300℃、道次变形量为5~20%、总变形量为20~80%、进料速度为2~6mm/min，制得纳米镁合金；a. The magnesium alloy bar is subjected to swaging deformation, the swaging temperature is controlled at 100-300°C, the deformation of each pass is 5-20%, the total deformation is 20-80%, and the feed rate is 2-6mm/min. Get nano-magnesium alloy;
b．将所得纳米镁合金在170~195℃下进行一级时效处理，处理时间为6~8h；b. The obtained nano-magnesium alloy is subjected to primary aging treatment at 170-195° C., and the treatment time is 6-8 hours;
c．将一级时效后的合金在200~230℃下进行二级时效处理，处理时间为10~30h。c. The alloy after primary aging is subjected to secondary aging treatment at 200~230°C for 10~30h.
所述一级时效处理，将所得纳米镁合金在175~195℃下进行一级时效处理，处理时间为6~8h。In the primary aging treatment, the obtained nano-magnesium alloy is subjected to primary aging treatment at 175-195° C., and the treatment time is 6-8 hours.
所述二级时效处理，将一级时效后的合金在210~230℃下进行二级时效处理，处理时间为10~30h。In the secondary aging treatment, the alloy after primary aging is subjected to secondary aging treatment at 210-230° C., and the treatment time is 10-30 hours.
本发明的优点有：Advantage of the present invention has:
纳米镁合金通常热稳定性较差，热处理时温度过高容易发生晶粒长大、严重降低合金力学性能。热处理温度过低合金不能分解出时效强化相，无法达到强化效果。因而选取的时效温度必须保证合金不发生晶粒长大，同时也要保证可以分解出强化相。Nano-magnesium alloys usually have poor thermal stability, and when the temperature is too high during heat treatment, grain growth is likely to occur, which seriously reduces the mechanical properties of the alloy. If the heat treatment temperature is too low, the alloy cannot decompose the aging strengthening phase, and the strengthening effect cannot be achieved. Therefore, the selected aging temperature must ensure that the grain growth of the alloy does not occur, and at the same time, it must also ensure that the strengthening phase can be decomposed.
同时经过剧烈塑性变形的VW93M合金在退火过程中，Gd、Y元素易脱溶形成块状富稀土相，块状富稀土相的产生也会剧烈降低合金的强度及塑性。时效温度过高、时效时间过长，都易导致块状富稀土相生成，但时效温度过低、时效时间过短则不能达到时效强化效果。因而必须控制合理的时效温度及时间，并通过温度和时间的组合优化，实现合金时效强化。At the same time, during the annealing process of the VW93M alloy undergoing severe plastic deformation, Gd and Y elements are easily desolvated to form massive rare earth-rich phases, and the generation of massive rare earth-rich phases will also drastically reduce the strength and plasticity of the alloy. If the aging temperature is too high and the aging time is too long, it will easily lead to the formation of massive rare earth-rich phases, but if the aging temperature is too low and the aging time is too short, the aging strengthening effect cannot be achieved. Therefore, a reasonable aging temperature and time must be controlled, and the combination of temperature and time must be optimized to achieve alloy aging strengthening.
大量试验探索表明，要保证时效处理中合金分解出时效强化相，同时保证晶粒不发生长大以及块状相不产生，必须采用双级时效处理工艺。在第一级时效处理过程中必须降低合金的内应力，才可降低合金晶粒长大的倾向和块状相产生的倾向。试验结果表明，在170~195℃进行第一级时效处理，处理时间为6~8h，变形产生的大部分内应力被消除；同时溶质原子开始偏聚。然后在200~230℃进行二级时效处理，处理时间为10~30h，此过程中时效分解相形成。A large number of experiments and explorations have shown that to ensure that the alloy decomposes into an age-strengthening phase during the aging treatment, and at the same time ensure that the grain does not grow and the block phase does not occur, a two-stage aging treatment process must be adopted. In the first-stage aging treatment process, the internal stress of the alloy must be reduced to reduce the tendency of the alloy grain to grow and the tendency of the block phase to be produced. The test results show that the first-stage aging treatment is carried out at 170-195°C for 6-8 hours, and most of the internal stress caused by deformation is eliminated; at the same time, the solute atoms begin to segregate. Then carry out secondary aging treatment at 200~230℃ for 10~30h, during which the aging decomposition phase is formed.
具体实施方式Detailed ways
实施例1Example 1
所用镁合金质量百分比成分为：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er，将棒材在125℃进行旋锻变形，控制道次变形量为15%、15%、10%，总变形量为35％，控制进料速度为2mm/min，制得纳米镁合金。将所得纳米镁合金在175℃进行第一级时效处理，时效时间8h，再将一级时效处理后的纳米镁合金在210℃下进行第二级时效处理，时效时间30h。The mass percentage composition of the magnesium alloy used is: Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er, the bar is swaged at 125 ° C, and the deformation of the control pass is 15%, 15%, 10%. , the total deformation is 35%, and the feeding speed is controlled to be 2mm/min, and the nano-magnesium alloy is prepared. The obtained nano-magnesium alloy was subjected to a first-stage aging treatment at 175°C for an aging time of 8 hours, and then the nano-magnesium alloy after the primary aging treatment was subjected to a second-stage aging treatment at 210°C for an aging time of 30 hours.
根据GB/T228-2002对时效态镁合金进行力学性能测试并与时效前合金进行对比，结果表明，对比于未时效纳米镁合金，时效态镁合金室温抗拉强度提高121MPa，屈服强度提高100MPa。According to GB/T228-2002, the mechanical properties of the aged magnesium alloy were tested and compared with the alloy before aging. The results showed that compared with the unaged nano-magnesium alloy, the tensile strength of the aged magnesium alloy at room temperature was increased by 121MPa, and the yield strength was increased by 100MPa.
实施例2Example 2
所用镁合金质量百分比成分为：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er，将棒材在215℃进行旋锻变形，控制道次变形量为15%、15%、10%，总变形量为35％，控制进料速度为2mm/min，制得纳米镁合金。将所得纳米镁合金在190℃进行第一级时效处理，时效时间6h，再将一级时效处理后的纳米镁合金在210℃下进行第二级时效处理，时效时间30h。The mass percentage composition of the magnesium alloy used is: Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er, the bar is subjected to swaging deformation at 215°C, and the deformation of each pass is controlled to be 15%, 15%, and 10%. , the total deformation is 35%, and the feeding speed is controlled to be 2mm/min, and the nano-magnesium alloy is prepared. The obtained nano-magnesium alloy was subjected to a first-stage aging treatment at 190°C for an aging time of 6 hours, and then the nano-magnesium alloy after the primary aging treatment was subjected to a second-stage aging treatment at 210°C for an aging time of 30 hours.
根据GB/T228-2002对时效态镁合金进行力学性能测试并与时效前合金进行对比，结果表明，对比于未时效纳米镁合金，时效态镁合金室温抗拉强度提高117MPa，屈服强度提高103MPa。According to GB/T228-2002, the mechanical properties of the aged magnesium alloy were tested and compared with the pre-aging alloy. The results showed that, compared with the unaged nano-magnesium alloy, the room temperature tensile strength of the aged magnesium alloy increased by 117MPa, and the yield strength increased by 103MPa.
实施例3Example 3
所用镁合金质量百分比成分为：Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er，将棒材在275℃进行旋锻变形，控制道次变形量为15%、15%、10%，总变形量为35％，控制进料速度为6mm/min，制得纳米镁合金。将所得纳米镁合金在190℃进行第一级时效处理，时效时间6h，再将一级时效处理后的纳米镁合金在230℃下进行第二级时效处理，时效时间15h。The mass percentage composition of the magnesium alloy used is: Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er, the bar is subjected to swaging deformation at 275 °C, and the deformation of the control pass is 15%, 15%, and 10%. , the total deformation is 35%, and the feeding speed is controlled to be 6mm/min, and the nano-magnesium alloy is prepared. The obtained nano-magnesium alloy is subjected to a first-stage aging treatment at 190°C for an aging time of 6 hours, and then the nano-magnesium alloy after the primary aging treatment is subjected to a second-stage aging treatment at 230°C for an aging time of 15 hours.
根据GB/T228-2002对时效态镁合金进行力学性能测试并与时效前合金进行对比，结果表明，对比于未时效纳米镁合金，时效态镁合金室温抗拉强度提高125MPa，屈服强度提高113MPa。According to GB/T228-2002, the mechanical properties of the aged magnesium alloy were tested and compared with the alloy before aging. The results showed that compared with the unaged nano-magnesium alloy, the tensile strength of the aged magnesium alloy at room temperature increased by 125MPa, and the yield strength increased by 113MPa.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463442A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Casting magnesium alloy containing Ag and heavy rare earth and preparation thereof |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN103820689A (en) * | 2012-11-19 | 2014-05-28 | 北京有色金属研究总院 | High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof |
| CN106756680A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of processing method of high-strength magnesium alloy small-sized bar |
| CN107245619A (en) * | 2017-03-03 | 2017-10-13 | 中南大学 | A kind of strong high temperature resistant magnesium alloy of superelevation |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463442A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Casting magnesium alloy containing Ag and heavy rare earth and preparation thereof |
| CN102828134A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Three-level aging heat treatment process for nanometer magnesium alloy |
| CN103820689A (en) * | 2012-11-19 | 2014-05-28 | 北京有色金属研究总院 | High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof |
| CN106756680A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of processing method of high-strength magnesium alloy small-sized bar |
| CN107245619A (en) * | 2017-03-03 | 2017-10-13 | 中南大学 | A kind of strong high temperature resistant magnesium alloy of superelevation |
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