对压铸AZ91D镁合金进行CO2激光局部重熔,采用OM和SEM观察了母材预存气孔和重熔区气孔特征,利用粒径分析软件Nano measure 1.2测量了气孔尺寸,着重研究了重熔区气孔同母材气孔的关联性.结果表明:压铸镁合金母材预存气孔在重熔过程表现出明显的遗传性；重熔区出现的微观气孔具有近圆形截面,内壁光滑,是氢致气孔；重熔区出现的宏观气孔呈蠕虫状,内壁存在气体通道,并具有明显的金属冲刷痕迹.分析认为,氢致气孔主要遗传于母材固溶的原子氢和存于压铸缺陷的分子氢,宏观气孔主要遗传于母材压铸过程卷入的气体.分析了两类气孔的形成机制,建立了母材预存气孔同重熔区宏观气孔内在关联的数学模型.
参考文献
| [1] | Pan J L.Electr Weld Mach,2005; 35(9):1 (潘际銮.电焊机,2005; 35(9):1) |
| [2] | Shan J G,Zhang J,Zheng S Q,Chen W Z,Ren J L.Acta Metall Sin,2009; 45:1006 (单际国,张靖,郑世卿,陈武柱,任家烈金属学报,2009; 45:1006) |
| [3] | Chen Z H,Yan H G,Chen J H.Magnesium Alloys.Beijing:Chemical Industry Press,2004:38 (陈振华,严红革,陈吉华.镁合金.北京:化学工业出版社,2004:38) |
| [4] | Zhao II,Debroy T.Weld J,2001; 80(8):204 |
| [5] | Wahba M,Mizutani M,Kawahito Y,Katayama S.Mater Des,2012; 33:569 |
| [6] | Shan J G,Zhang J,Zheng S Q,Chen W Z,Ren J L.Rare Met Mater Eng,2009; 38(S3):234 (单际国,张靖,郑世卿,陈武柱,任家烈.稀有金属材料与工程,2009; 38(S3):234) |
| [7] | Zhang J,Shan J G,Wen P,Ren J L.Chin J Lasers,2011;38(6):1 (张靖,单际国,温鹏,任家烈.中国激光,2011; 38(6):1) |
| [8] | Zhang J,Shan J G,Wen P,Ren J L.Trans China Weld Inst,2011; 32(5):17 (张靖,单际国,温鹏,任家烈.焊接学报,2011; 32(5):17) |
| [9] | You G Q,Zhu J H,Guo Q,Long S Y.Spec Cast Nonferrous Alloys,2009; 29:729 (游国强,朱觉华,郭强,龙思远.特种铸造及有色合金,2009;29:729) |
| [10] | Wu J T,You G Q,Guo Q,Long S Y.Hot Work Technol,2011; 40(1):117 (武靖亭,游国强,郭强,龙思远.热加工工艺,2011; 40(1):117) |
| [11] | Shen J,You G Q,Long S Y,Pan F S.Mater Charact,2008; 59:1059 |
| [12] | Min D,Shen J,Lai S Q,Chen J,Xu N,Liu H.Opt Laser Eng,2011; 49(1):89 |
| [13] | Liao H M.Master Dissertation,Chongqing University,2006 (廖慧敏.重庆大学硕士学位论文,2006) |
| [14] | Xu S X,Wu S S,Li Q.Light Met,2008; (8):43 (许四祥,吴树森,李庆.轻金属,2008:(8):43) |
| [15] | Xu S X,Wu S S,Mao Y W.Spec Cast Nonferrous Alloys,2007; 27:11 (许四祥,吴树森,毛有武.特种铸造及有色合金,2007; 27:11) |
| [16] | Cao X,Jahazi M,Immarigeon J P,Wallace W.J Mater Process Technol,2006; 171:188 |
| [17] | Yu K,Nakata K,Liao J.Sci Technol Weld Join,2009; 14:554 |
| [18] | Renzhi M,Yoshio B.Chem Phys Lett,2003; 370:770 |
| [19] | Tadao S,Hideo H,Tadashi E,Osamu F,Minoru L.J Mater Sci,1981; 16:1829 |
| [20] | Jia Z,Zhang Z Q,Yue Q C,Cui J Z.Foundry,2011; 60:635 (贾征,张志强,乐启炽,崔建忠.铸造,2011; 60:635) |
| [21] | Zeng K,Klassen T,Oelerich W,Bormann R.Int J Hydrogen Energ,1999; 24:989 |
| [22] | Kinio K,Robert D,Pzhcke D.Metall Trans,1985; 16B:359 |
| [23] | Poirrer D K,Yeum K,Maples A L.Metall Trans,1987;18:1979 |
| [24] | Wang X J,You G Q,Yang Z,Long S Y.Rare Met Mater Eng,2012; 12 (accepted) (王向杰,游国强,杨智,龙思远.稀有金属材料与工程,2012:12(已接收)) |
| [25] | Chi C T,Chao C G,Liu T F,Wang C C.Sci Technol Weld Join,2008; 13:199 |
| [26] | German D,Dmitriy D.Surface Phenomena in Fusion Welding Processes.German:CRC Press Taylor&Francis Group,2006:262 |
| [27] | Triantafyllidis D,Li L,Stott F H.Appl Surf Sci,2003;208-209:458 |
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