锻压技术

等温处理对Mg-3Y-4Nd-1Ni-0.5Zr合金半固态坯料件显微组织的影响

英文标题：Influence of isothermal treatment on microstructure of Mg-3Y-4Nd-1Ni-0.5Zr alloy semi-solid billet

单位：1.航空工业成都飞机工业（集团）有限责任公司 2.西南交通大学材料科学与工程学院

关键词：等温加热法稀土镁合金半固态温度保温时间粗化合并机制 Ostwald熟化机制

分类号：TG146.22

出版年,卷(期):页码：2023,48(5):51-60

摘要：

采用半固态等温加热法，观察Mg-3Y-4Nd-1Ni-0.5Zr合金在不同半固态温度（580、595、610和625 ℃）和保温时间（5、15、30和60 min）下的微观组织形貌，研究工艺参数对显微组织演变的影响，得到晶粒粗化机制和最佳半固态触变成形工艺参数。结果表明：经过等温加热处理后，Mg-3Y-4Nd-1Ni-0.5Zr合金组织由细小的α-Mg晶粒转变为球形颗粒；随着半固态温度和保温时间的增加，Mg-3Y-4Nd-1Ni-0.5Zr合金的平均晶粒尺寸、液相率和形状系数逐渐增加。当半固态温度低于595 ℃或保温时间少于30 min时，半固态显微组织演变主要以晶粒长大为主，粗化合并机制起主导作用；当半固态温度高于610 ℃或保温时间超过30 min时，半固态显微组织液相增加和固相颗粒球状化，Ostwald熟化机制起主导作用。最佳工艺参数为：半固态温度为625 ℃、保温时间为15 min，此工艺参数下的Mg-3Y-4Nd-1Ni-0.5Zr合金的平均晶粒尺寸、液相率和形状系数分别为（60.9±3.1）μm，（31.2±1.4）%和（64.1±0.4）%。

The microstructure of Mg-3Y-4Nd-1Ni-0.5Zr alloy was observed by semi-solid isothermal heating method under different semi-solid temperatures (580, 595, 610 and 625 ℃) and holding times (5, 15, 30 and 60 min), and the influences of process parameters on microstructure evolution were investigated to obtain the grain coarsening mechanism and optimum semi-solid thixoforming process parameters. The results show that Mg-3Y-4Nd-1Ni-0.5Zr alloy structure changes from fine α-Mg grains to spherical particles after isothermal heating treatment, and the average grain size, liquid fraction and shape coefficient of Mg-3Y-4Nd-1Ni-0.5Zr alloy increase with the increasing of semi-solid temperature and holding time. When the semi-solid temperature is lower than 595 ℃ or the holding time is less than 30 min, the microstructure evolution of semi-solid microstructure is mainly dominated by grain growth, and coarsening merge mechanism plays a leading role. When the semi-solid temperature is higher than 610 ℃ or the holding time is more than 30 min, the liquid phase of the semi-solid microstructure increases， the solid particles become spheroidal, and the Ostwald ripening mechanism plays a dominant role. The optimal process parameters are the semi-solid temperature of 625 ℃ and the holding time of 15 min. Under the optimal process parameters, the average grain size, liquid fraction and shape coefficient of Mg-3Y-4Nd-1Ni-0.5Zr alloy are (60.9±3.1)μm, (31.2±1.4)% and (64.1±0.4)%, respectively.

基金项目：

四川省科技厅重点研发计划项目（2017GZ0399）

作者简介：张虹桃（1995-），男，硕士，助理工程师，E-mail：zht1547986876@126.com；通信作者：权高峰（1958-），男，博士，教授，E-mail：suhlhust@sina.com

参考文献：

[1]张磊, 彭志刚, 余金陵, 等. 非常规油气压裂球的研制及分析[J]. 石油与天然气化工, 2013, 42(2): 165-167.

Zhang L, Peng Z G, Yu J L, et al. Preparation and structure analysis of unconventional oil-gas fracturing ball[J]. Chemical Engineering of Oil & Gas, 2013, 42(2): 165-167.

[2]Lian Z H, Zhang Y, Zhao X, et al. Mechanical and mathematical models of multi-stage horizontal fracturing strings and their application[J]. Natural Gas Industry B, 2015, 2(2-3):185-191.

[3]Niu H Y, Deng K K, Nie K B, et al. Microstructure, mechanical properties and corrosion properties of Mg-4Zn-xNi alloys for degradable fracturing ball applications[J]. Journal of Alloys and Compounds, 2019, 787(30): 1290-1296.

[4]刘锋. 镁合金表面新型微弧氧化涂层制备及性能表征研究[D]. 北京：中国科学院金属研究所, 2012.

Liu F. Preparation and Characterization of a Novel Micro-arc Oxidation Coating on Magnesium Alloys[J]. Beijing:Institute of Metal Research, Chinese Academy of Sciences, 2012.

[5]Bhattacharyya J J, Wang F, McQuade P J, et al. Deformation and fracture behavior of Mg alloy, WE43, after various aging heat treatments[J]. Materials Science and Engineering: A, 2017, 705: 79-88.

[6]Xiang C C, Gupta N, Coelho P, et al. Effect of microstructure on tensile and compressive behavior of WE43 alloy in as cast and heat-treated conditions[J]. Materials Science and Engineering: A, 2018, 710: 74-85.

[7]Yu Z J, Chao X, Jian M, et al. Microstructure evolution and mechanical properties of as-extruded Mg-Gd-Y-Zr alloy with Zn and Nd additions[J]. Materials Science and Engineering:A, 2018, 713: 234-239.

[8]Tsai M Y, Chou M H, Kao C R. Interfacial reaction and the dominant diffusing species in Mg-Ni system[J]. Journal of Alloys and Compounds, 2009, 471(1-2): 90-92.

[9]Song G L, Atrens A. Corrosion mechanisms of magnesium alloys[J]. Advanced Engineering Materials, 2010, 1(1): 11-33.

[10]Oh S K, Kim M J, Eom K S, et al. Design of Mg-Ni alloys for fast hydrogen generation from seawater and their application in polymer electrolyte membrane fuel cells[J]. International Journal of Hydrogen Energy, 2016, 41(10): 5296-5303.

[11]刘运楼, 李斌, 潘勇,等. 分段压裂用可溶球的研制[J]. 天然气工业, 2016, 36(9):96-101.

Liu Y L, Li B, Pan Y, et al. Research and development of soluble ball for staged fracturing [J]. Natural Gas Industry, 2016, 36(9): 96-101.

[12]刘恩洋, 于思荣, 纪志康,等. 漂珠/镁合金复合材料可溶压裂球的制备及组织性能研究[J]. 稀有金属, 2019, 43(8), 792-799.

Liu E Y, Yu S R, Ji Z K, et al. Preparation，microstructure and properties of fly ash cenosphere /Mg alloy composites for degradable fracturing ball applications[J]. Chinese Journal of Rare Metals, 2019, 43(8): 792-799.

[13]Li Y K, Li L, Geng B Y, et al. Microstructure characteristics and strengthening mechanism of semisolid CuSn10P1 alloys[J]. Materials Characterization, 2021, 172: 1108-1119.

[14]Wang Q P, Li L, Zhou R F, et al. Rheological behavior of semisolid hypereutectic Al-Si alloys[J]. Journal of Materials Research, 2019, 34(12): 2105-2113.

[15]陈刚, 郑顺奇, 王岩, 等. 镁合金半固态浆料制备与成形技术研究进展[J]. 兵器材料科学与工程, 2018, 41(3): 116-120.

Chen G, Zheng S Q, Wang Y, et al. Research status of preparation and forming technology of semi-solid Mg alloy slurry[J]. Ordnance Material Science and Engineering, 2018, 41(3): 116-120.

[16]尹湘林, 杨弋涛, 邵玉鹏, 等. 铝合金半固态坯料感应加热过程的组织演变及控制[J]. 特种铸造及有色合金, 2009, 29(8): 717-822.

Yin X L, Yang Y T, Shao Y P, et al. Microstructural evolution and control of semi-solid aluminum alloy during electromagnetic induction reheating[J]. Special Casting & Nonferrous Alloys, 2009, 29(8): 717-823.

[17]Xu Y T, Guan T Y, Zhang Z F, et al. Semi-solid rheological squeeze casting process of ZL114A aluminum alloy thin-wall complex casting[J]. Materials Science Forum, 2020, 993: 248-253.

[18]Feng J K, Zhang D F, Hu H J, et al. Improved microstructures of AZ31 magnesium alloy by semi-solid extrusion[J]. Materials Science and Engineering:A, 2021, 800: 140204.

[19]Zhang L, Li Y L, Yu C T, et al. Effect of equal channel angular pressing on microstructure and mechanical properties of ZK60 alloy[J]. Journal of Physics: Conference Series, 2021, 1798: 012023.

[20]刘伟,张英波,李彬, 等.半固态等温处理Mg-Zn-Y合金微观组织演变[J]. 稀有金属材料与工程, 2015, 44(12): 3244-3247.

Liu W, Zhang Y B, Li B, et al. Microstructure evolution of Mg-Zn-Y alloys during semi-solid isothermal heat treatment[J]. Rare Metal Materials and Engineering, 2015, 44(12): 3244-3247.

[21]孙兵, 张英波, 权高峰, 等. AZ80镁合金半固态等温处理过程中的组织演变[J]. 稀有金属材料与工程, 2016, 45（2）: 404-408.

Sun B, Zhang Y B, Quan G F, et al. Microstructure evolution of AZ80 magnesium alloy in semi-solid isothermal treatment process[J]. Rare Metal Materials and Engineering, 2016, 45（2）: 404-408.

[22]Zhang H T, Fan L L, Zhou M Y, et al. Effects of semi-solid treatment by electro-magnetic induction on microstructure evolution and mechanical properties of the Mg-2.4Y-4Nd-0.5Zr-1Ni alloys[J]. Materials Research Express, 2020, 7(5): 056506.

[23]Li J Q, Zhang L, Dong X P, et al. Study on microstructure of semi-solid magnesium alloy manufactured by gas bubbles stirring[J]. Advanced Materials Research, 2010, 129-131: 728-734.

[24]黄晓锋, 张乔乔, 马亚杰, 等. Mg-6Zn-1Cu-0.3Mn镁合金的半固态组织演变[J]. 材料导报, 2019, 33(20): 3441-3447.

Huang X F, Zhang Q Q, Ma Y J, et al. Semi-solid microstructure evolution of Mg-6Zn-1Cu-0.3Mn magnesium alloy[J]. Materials Reports, 2019, 33(20): 3441-3447.

[25]Inoue A, Shibata T, Zhang T. Effect of additional elements on glass transition behavior and glass formation tendency of Zr-Al-Cu-Ni alloys[J]. Materials Transactions Jim, 2007, 36(12): 1420-1426.

[26]Hampp C, Ullmann B, Reifenrath J, et al. Research on the biocompatibility of the new magnesium alloy LANd442-An in vivo study in the rabbit tibia over 26 weeks[J]. Advanced Engineering Materials, 2012, 14(3): B28-B37.

[27]Ma K K, Wen H M, Hu T, et al. Mechanical behavior and strengthening mechanisms in ultrafine grain precipitation-strengthened aluminum alloy[J]. Acta Materialia, 2014, 62(5): 141-155.

[28]孙浩, 周明扬, 屈晓妮, 等. 半固态等温处理与电磁感应加热AZ80-0.2Y镁合金组织的演变[J]. 中国有色金属学报, 2017, 27(10): 1989-1995.

Sun H, Zhou M Y, Qu X N, et al. Microstructure evolution of AZ80-0.2Y magnesium alloy processed by semi-solid isothermal and induction heat-treatment[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(10): 1989-1995.

[29]唐小玲, 尚淑珍, 路贵民, 等. 6061铝合金触变压缩数值模拟[J]. 塑性工程学报, 2011, 18(6): 26-30.

Tang X L, Shang S Z, Lu G M, et al. Finite element simulation for thixo-compression of Al 6061[J]. Journal of Plasticity Engineering, 2011, 18(6): 26-30.

服务与反馈：

【文章下载】【加入收藏】