用低过热度浇注和弱行波电磁搅拌工艺制备半固态AlSi7Mg合金浆料,研究了浇注温度和搅拌功率对其初生α-Al形貌的影响.结果表明,用该工艺可制备初生α-Al形貌呈小而圆整的球状晶粒,组织分布均匀,较大尺寸(直径为127 mm)的半固态AlSi7Mg合金浆料.浇注温度合适,短时间弱电磁搅拌(8 S左右)就可获得初生α-Al形貌大部分为球状,组织分布比较均匀的浆料组织.浇注温度一定,适当提高搅拌功率可明显改善初生α-Al的形貌,但是过高的搅拌功率并不能使初生α-Al的形貌进一步改善.用该工艺制备的半固态AlSi7Mg合金浆料,从其边部到心部的径向组织初生α-Al形貌经历了一个从枝晶组织向蔷薇状组织再向球状组织转变的过程.
参考文献
| [1] | D.B.Spencer,R.Mehrebian,M.C.Flemings,Rheological behavior of Sn-15Pb in the crystallization range,Metall Trails,3(7),1925(1972) |
| [2] | M.C.Flemings,R.G.Riek,K.P.Young,Rheocasting,Mater.Sci and Eng.,25,103(1976) |
| [3] | M.C.Flemings,Behavior of metal alloys in the semis-solid state,Metall Traus,22A(5),957-981(1991) |
| [4] | XIE Shuisheng,HUANG Shenghong,The technology and application of Semi-solid metal processing (Beijing,Metallurgical industry press,1999)(谢水生,黄声宏,半固态金属加工技术及其应用(北京,冶金工业出版社,1999)P.130) |
| [5] | MAO Weimin,Semi-solid metal forming technology (Beijing,Machinery industry press,2004)(毛卫民,半固态金属成形技术(北京,机械工业出版社,2004)P.357) |
| [6] | S.P.Midson,The commercial status of semi-solid casting in the USA,in:Proc of the 4th Int Conf on Semi-solid Processing of Alloys and Composites,edited by D.H.Kirkwood and P.Kapranos (University of Sheffield,England,UK,Department of Engineering Materials,University of Sheffield,1996) p.251 |
| [7] | K.P.Young,C.P.Kyonka,J.A.Courtoris,Fine grained metal composition.US Patent,4415347,1983 |
| [8] | V.I.Dobatkin,G.I.Eskin,Ingots of aluminum alloys with nondendritic structure produced by ultrasonic treatment for deformation in the semi-solid state,in:Proc of the 4th Int Conf on Semi-solid Processing of Alloys and Composites,edited by D.H.Kirkwood and P.Kapranos (University of Sheffield,England,UK,Department of Engineering Materials,University of Sheffield,1996) p.193 |
| [9] | HU Hanqi,The Metal Solidification Theory,2nd edition,(Beijing,Machinery Industry Press,2000) p.109(胡汉起,金属凝固原理,第2版,(北京,机械工业出版社,2000)P.109) |
| [10] | MAO Weimin,ZHAO Aimin,CUI Chenglin,ZHONG Xueyou,The formation mechanism of non-dendritic primary α-Al phases in semi-solid A1Si7Mg alloy,Acta Metall.Sinica,35(9),971(1999)(毛卫民,赵爱民,崔成林,钟雪友,电磁搅拌对半固态AlSi7Mg合金初生α-Al的影响规律,金属学报,35(9),971(1999)) |
| [11] | GAO Songfu,Mao Weimin,Bai Yuelong,Li Qiang,Filling ability of semi-solid A356 alloy in rheo-casting and microstructure distribution,Special Casting & Nonferrous Alloys,10,598-599(2005)(高松福,毛卫民,白月龙,李强,半固态A356铝合金的流变压铸充填性与组织分布,特种铸造及有色合金,10,598-599(2005)) |
| [12] | MAO Weimin,BAI Yuelong,TANG Guoxing,Preparation for semi-solid aluminum alloy slurry under weak electromagnetic stirring condition,J.Mater.Sci.Technol.,22(4),447(2006) |
| [13] | LIU Zheng,MAO weimin,ZHAO Zhenduo,Preparation of semi-solid slurry of aluminum alloys by a new technology,Chinese J.Mater.Research,20(2),125(2006)(刘政,毛卫民,赵振铎,用新工艺制备半固态铝合金浆料,材料研究学报,20(2),125(2006)) |
| [14] | TIAN Zhanfeng,ZHANG zhifeng,XU Jun,Shi Likai.The MSCP process semi-solid slurry production.Proceedings of the 9th International Conference on Semi-Solid Processing of Alloys and Composites.Busan Korea,September,11-13,362-365(2006) |
| [15] | E.Cardoso,H.V.Atkinson,H.Jones,Microstructural evolution of A356 during NRC processing.Proc of the 8th Int Conf on Semi-solid Processing of Alloys and Composites,edited by A.Alexandrou,D.Apelian and G.Georgiou(Limassol,Cyprus,University of Cyprus,2004) p.296 |
| [16] | PAN Ye,ZHANG Chunyan,YUAN Haoyang,SUN Guoxiong,Effect of metal flow at initial solidification on granular primary crystal formation in semi-solid alloy,Acta Metall.Sinica,37(10),1035(2001)(潘冶,张春燕,袁浩扬,孙国雄,结晶初期熔体流动对半固态合金粒状初晶形成的作用,金属学报,37(10),1035(2001)) |
| [17] | MAO Weimin,ZHEN Zisheng,CHEN Hongtao,Microstructure of semi-solid AZ91D alloy solidified during electromagnetic stirring,Chinese J.Mater.Research,19(3),303(2005)(毛卫民,甄子胜,陈洪涛,电磁搅拌对半固态AZ91D镁合金组织的影响,材料研究学报,19(3),303(2005)) |
| [18] | J.A.Yurko,R.A.Martinez,M.C.Flemings,Development of the semi-solid rheocasting (SSR) process,in:Proc of the 7th Int Conf on Semi-solid Processing of Alloys and Composites,edited by Y.Tsutsui,M.Kiuchi and K.Ichikawa(Tsukuba Japan,National Institute of Advanced Industrial Science and Technology,Japan Society for Technology of Plasticity,2002) p.659 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%