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| 1 | Mold-filling ability of semisolid alloy显示文摘The mold-filling ability of the semisolid alloy has very important effects on the quality and properties of the work pieces produced by the semisolid forming process. The factorial experiments show that all of the heating factors, such as mold temperature, heating temperature and the keeping time of billets, have some effects on the mold-filling ability of semisolid alloy. According to the analysis of influencing extent on the filling ability, it is found that the most important one of the factors is the mold temperature instead of the billets temperature, the next one is the heating temperature of the billet, and the keeping time rows on the third. It is also found that there is an interrelation between the billet heating temperature and the mold temperature. The effect of the interrelation on the mold-filling abilityis even stronger than the keeping time. The higher the mold temperature, heating temperature or the keeping time is, the better the mold-filling ability of the semisolid alloy is. The parameter to describe themold-filling ability, defined as the maximum filling height along theupright direction or the maximum filling length along the horizontal direction, can be theoretically determined according to the flowing theory of viscous fluid. | ShumingXing LizhongZhang DabenZeng JuntaoShi | 2002 | Journal of University of Science and Technology Beijing2002，9，4： | 2 |
| 2 | Influence of Rolling Treatment on Interfacial Shear Strength of Steel-mushy Al-7graphite Bonding Plate显示文摘At room temperature, the rolling treatment of steel-mushy A1-7graphite bonding plate was carried out under different relative reduction. The influence of rolling on interracial mechanical property of this bonding plate was studied. The results show that, for steel-mushy AI-7graphite bonding plate which is made up of 1.2 mm in thickness 08AI steel plate and 2.0 mm in thickness AI-Tgraphite layer, there is a nonlinear relationship between interracial shear strength of bonding plate and relative reduction of rolling. When relative reduction of rolling is smaller than 2.59%, with the increasing of relative reduction, interracial shear strength of bonding plate increases gradually. When relative reduction of rolling is bigger than 2.5g%, with the increasing of relative reduction, interracial shear strength of bonding plate decreases continuously. When relative reduction of rolling is 2.59%, the largest interracial shear strength 77.0 MPa can be obtained. | PengZHANG YunhuiDU HanwuLIU DabenZENG JianzhongCUI LiminBA | 2004 | Journal of Materials Science & Technology2004，20，6： | 1 |
| 3 | Influence of diffusion time on property of steel-aluminum solid to liquid bonding显示文摘The bonding of solid steel to liquid aluminum was conducted using rapid solidification. The influence of diffusion time on interfacial shear strength was studied. The results show that when the temperature of aluminum liquid is 700℃ and the preheat temperature of steel plate is 250℃, the relationship between diffusion time (t) and interfacial shear strength (( ) is ( =15.1+8.14t(037t2 +0.005t3, and the maximum interfacial shear strength is 71.1 MPa. | PengZhang DabenZeng 等 | 2002 | Journal of University of Science and Technology Beijing2002，9，6： | 1 |
| 4 | Semi-solid Pressing Bonding Strength between Steel and Cu-graphite Composite显示文摘The pressing bonding of steel plate with QTi3.5-3.5graphite slurry was studied. The relationship among preheating temperature of steel plate, preheating temperature of dies, solid fraction of QTi3.5-3.5graphite slurry, and interfacial shear strength of bonding plate could be established with artificial neural networks perfectly. This model could be optimized with a genetic algorithm. The results show that the optimum bonding parameters are: 618℃ for preheating temperature of steel plate, 526℃ for preheating temperature of dies and 46.2% for solid fraction of QTi3.5-3.5graphite slurry, and the largest interfacial shear strength of bonding plate is 128.3 MPa. | PengZHANG YunhuiDU HanwuLIU DabenZENG JianzhongCUI LiminBA | 2005 | Journal of Materials Science & Technology2005，21，2： | 1 |
| 5 | Influence of Solid Fraction on Structure of QTi3.5-15/Graghite Slurry显示文摘The electromagnetic-mechanical stirring technology was used to prepare QTi3.5-15/graghite slurry. The distribution of graphite particles in QTi3.5-15/graghite slurry was studied using cold quenching method. The results show that solid fraction of QTi3.5-15/graphite slurry increases with the decreasing of stirring temperature. There is a linear relationship between solid fraction and stirring temperature. With the increasing of solid fraction, the distribution of graphite particles in slurry becomes uniform gradually. When the solid fraction is larger than 45%, the rising of graphite particles in slurry can be restricted, and QTi3.5-15/graghite slurry with uniform distribution of graphite particles can be prepared. | PengZHANG YunhuiDU HanwuLIU DabenZENG dianzhongCUI LiminBA | 2004 | Journal of Materials Science & Technology2004，20，6： | 0 |
| 6 | Interfacial mechanical property of steel-mushy Al-20Sn bonding显示文摘The bonding of a steel plate to A1-20Sn slurry was conducted using the casting rolling technique. The surface of the steel plate was defatted, descaled, immersed (in K2ZrF6 flux aqueous solution) and stoved. A1-20Sn slurry was prepared using the electromagnetic mechanical stirring method. The interfacial mechanical property of the bonding plate was researched to determine the relationship between the diffusion time and the interfacial shear strength. In order to identify the mechanism of bonding, the interfacial structure of the bonding plate was studied. The results show that at a preheat temperature of the steel plate of 505℃ and a solid fraction of A1-20Sn slurry of 35%, the relationship between the interfacial shear strength S and the diffusion time t is S=28.8+4.3t-0.134t2 +0.0011t3. When the diffusion time is 22 s, the largest interfacial shear strength is 70.3 MPa, and the corresponding interface is a new one which is made up of Fe-A1 compound and Fe-Al solid solution alternatively and in a right proportion.In this interfacial structure, the interfacial embrittlement does not happen and Fe-Al compound can play its role in strong combination adequately. | PengZhang YunhuiDu HanwuLiu DabenZeng JianzhongCui LiminBat | 2004 | Journal of University of Science and Technology Beijing2004，11，2： | 0 |
| 7 | Influence of Diffusion Time on Steel-Aluminum Solid to Liquid Bonding Interfacial Structure显示文摘The bonding of steel plate to aluminum liquid was conducted using rapid solidification.The influence of diffusion time on interfacial structure was studied.The results showed that under the condition of 750℃ for the temperature of aluminum liquid and 200℃ for the preheat temperature of steel plate,when diffusion time was shorter than 4.3s,there was only Fe-Al solid solution at the interface.When diffusion time was longer than 4.3s,Fe-Al compound began to form at the interface.The relationships between diffusion time t and thickness of Fe-Al compound layer H are H=-9.72+2.62t-0.08t^2(4.3s≤t≤15s)and H=2.79+0.647t=0.033t^2(t>15s). | PengZHANG Yunhui ShumingXING LizhongZHANG DabenZENG Jianzhong LiminBA | 2002 | Journal of Materials Science & Technology2002，18，5： | 0 |
| 8 | Study on Mechanical Property in Steel-Aluminum Solid to Liquid Bonding显示文摘The bonding of solid steel plate to liquid Al was conducted using rapid solidification. The influence of thickness of FeAl compound layer at the interface on interfacial shear strength of bonding plate was studied. The results show that the relationship between thickness of Fe-Al compound layer and interfacial shear strength is S=30.4+8.51 h-0.51 h2+0.007 ha (where h is thickness of Fe-Al compound layer, S is interfacial shear strength). When thickness of Fe-Al compound layer is 10.7μm, the largest interfacial shear strength is 71.6 Mpa. | LizhongZHANC PengZHANG YunhuiDU DabenZENG JianzhongCUI LiminBA | 2003 | Journal of Materials Science & Technology2003，19，2： | 0 |
| 9 | Interfacial Structure of Steel-Mushy Al-20Sn Bonding Plate显示文摘Fe-Al compound at the interface of steel-mushy Al-20Sn bonding plate was studied quantitatively. The relationship between ratio of Fe-Al compound at interface and bonding parameters (such as preheat temperature of steel plate,solid fraction of Al-20Sn slurry and rolling speed) was established by artificial neural networks perfectly. The results show that when the bonding parameters are 505℃ for preheat temperature of steel plate, 34.3% for solid fraction of AI-20Sn slurry and 10 mm/s for rolling speed, the reasonable ratio of Fe-Al compound corresponding to the largest interfacial shear strength of bonding plate is obtained. Its value is 72%. This reasonable ratio of Fe-Al compound is a quantitative criterion of interracial embrittlement, that is, when the ratio of Fe-Al compound at interface is larger than 72%, interracial embrittlement will occur. | PengZHANG YunhuiDU HanwuLIU DabenZENG JianzhongCUI LiminBA | 2004 | Journal of Materials Science & Technology2004，20，2： | 0 |
| 10 | Thickness of compound layer in steel-aluminum solid to liquid bonding显示文摘The bonding of solid steel plate to liquid aluminum was studied using rapid solidification. The surface of solid steel plate was defatted, descaled, immersed (in K2ZrF6 flux aqueous solution) and stoved. In order to determine the thickness of Fe-A1 compound layer at the interface of steel-aluminum solid to liquid bonding under rapid solidification, the interface of bonding plate was investigated by SEM (Scanning Electron Microscope) experiment. The relationship between bonding parameters (such as preheat temperature of steel plate, temperature of aluminum liquid and bonding time) and thickness of Fe-Al compound layer at the interface was established by artificial neural networks (ANN) perfectly. The maximum of relative error between the output and the desired output of the ANN is only 5.4%. From the bonding parameters for the largest interfacial shear strength of bonding plate (226℃ for preheat temperature of steel plate, 723 ℃ for temperature of aluminum liquid and 15.8 s for bonding time), the reasonable thickness of Fe-A1 compound layer 10.8 μm was got. | PengZhang YunhuiDu HanwuLiu ShumingXing DabenZeng JianzhongCui LiminBa | 2003 | Journal of University of Science and Technology Beijing2003，10，5： | 0 |
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