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Interfacial structure of steel-Al-28Pb bonding plate with semisolid rolling-casting method

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中国有色金属学会会刊：英文版 2004年第2期14卷 325-329页

作者：张鹏杜云慧刘汉武曾大本崔建忠巴立民 Department of Mechanical Engineering Metal Forming Department anshan automobile fittings factory

Fe-Al compound at the interface of steel-mushy Al-28Pb bonding plate was studied quantitatively. The relationship between ratio of Fe-Al compound at interface and bonding parameters such as preheating temperature of steel plate, solid volume fraction of Al-28Pb slurry and rolling speed, was established by artificial neural networks perfectly. The results show that when the bonding parameters are 546 ℃ for preheating temperature of steel plate, 43.5% for solid volume fraction of Al-28Pb slurry and 8.6 mm/s for rolling speed, the reasonable ratio of Fe-Al compound corresponding to the largest interfacial shear strength of bonding plate is obtained as 71.5%. This reasonable ratio of Fe-Al compound is a quantitative criterion of interfacial embrittlement, that is, when the ratio of Fe-Al compound at interface is larger than 71.5%, interfacial embrittlement will occur.

关键词： Fe-Al金属间化合物高温结构材料界面结构焊接半固态铸轧

Ratio of Fe-Al compound at interface of steel-backed Al-graphite semi-solid bonding plate

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Journal of Central South University of Technology 2007年第1期14卷 7-12页

作者：张鹏杜云慧刘汉武张君曾大本巴立民 Department of Mechanical Engineering Beijing Jiaotong University Department of Mechanical Engineering Tsinghua University anshan automobile fittings factory

The ratio of Fe-Al compound at the bonding interface of solid steel plate to Al-7graphite slurry was used to characterize the interracial structure of steel-Al-7graphite semi-solid bonding plate quantitatively. The relationship between the ratio of Fe-Al compound at interface and bonding parameters （such as preheat temperature of steel plate, solid fraction of Al-7graphite slurry and rolling speed） was established by artificial neural networks perfectly. The results show that when the bonding parameters are 516 ℃ for preheat temperature of steel plate, 32.5% for solid fraction of Al-7graphite slurry and 12 mm/s for rolling speed, the reasonable ratio of Fe-Al compound corresponding to the largest interfacial shear strength of bonding plate is obtained to be 70.1%. This reasonable ratio of Fe-Al compound is a quantitative criterion of interracial embrittlement, namely, when the ratio of Fe-Al compound at interface is larger than 70.1%, interfacial embrittlement will occur.

关键词： bonding interface ratio of Fe-AI compound at interface artificial neural network

Influence of diffusion time on steel-mushy Al-7graphite bonding

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中国有色金属学会会刊：英文版 2002年第6期12卷 1127-1130页

作者：杜云慧张鹏曾大本崔建忠巴利民 Department of Mechanical Engineering Northern Jiaotong University Department of Mechanical Engineering Tsinghua University Metal Forming Department Northeastern University anshan automobile fittings factory

The bonding of steel plate to Al 7graphite slurry was conducted using casting rolling technique. The influence of diffusion time on interfacial mechanical property and structure of bonding plate was studied. The results show that: under the condition of 510 ℃ for preheat temperature of steel plate and 32% of solid fraction of Al 7graphite slurry, the relationship between interfacial shear strength S and diffusion time t is S =25.3+4.47 t- 0.133t 2 +0.001t 3 . When diffusion time is 22.5 s, the largest interfacial shear strength 69.9 MPa is got, and the corresponding interface is made up of Fe Al compound and Fe Al solid solution alternatively and in a right proportion.

关键词：扩散时间界面剪动强度界面结构钢

Study on QTi3.5-10graphite slurry

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中国有色金属学会会刊：英文版 2004年第1期14卷 148-151页

作者：张鹏杜云慧刘汉武曾大本崔建忠巴立民 Department of Mechanical Engineering Beijing Jiaotong University Department of Mechanical Engineering Tsinghua University Metal Forming Department Northeastern University anshan automobile fittings factory

QTi3.5 10graphite(mass fraction, %) slurry was prepared using electromagnetic mechanical stirring technology. The distribution of graphite particles in QTi3.5 10graphite slurry was studied using cold quenching method. The results show that solid fraction of QTi3.5 10graphite slurry increases with the decreasing stirring temperature. There is a linear relationship between solid fraction and stirring temperature. With increasing solid fraction, the rising of graphite particles in slurry is restricted gradually. When the solid fraction is larger than 42.5%, the rising of graphite particles in slurry can be controlled, and QTi3.5 10graphite slurry with uniform distribution of graphite particles can be prepared.

关键词： QTi3.5-10 石墨电极固体分数电磁搅拌制备

Influence of aluminum solid fraction on property of steel-mushy aluminum bonding plate

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International Journal of Minerals,Metallurgy and Materials 1999年第3期13卷 193-195页

作者： Peng Zhang Yunhui Du Xueping Ren Yonglin Kang Hanwu Liu Jianzhong Cui Limin Ba(Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China)(Metal Forming Department, Northeastern University, Shenyang 110006 Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Metal Forming Department Northeastern University Shenyang 110006 China anshan automobile fittings factory Anshan 114014 China

The interfacial shear property of steel-mushy aluminum bonding plate was studied, and the relationship between aluminum solid fraction and the interfacial shear strength of bonding plate was determined. The results showed that when aluminum solid fraction is 34.3 %, the maximum interfacial shear strength of bonding plate is 71 .0 MPa.

关键词： steel-mushy aluminum bonding plate solid fraction interfacial shear strength

Immersing Treatment of Steel Plate Surface in Steel-Aluminum Solid to Liquid Bonding

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 57-60页

作者： Peng Zhang Yunhui Du Xueping Ren Yonglin Kang Hanwu Liu Jianzhong Cui Limin Ba (Material Science and Engineering School, University of Science and Technique Beijing, Beijing 100083, China)(Metal Forming Department Northeastern University, Shenyang 1 Material Science and Engineering School University of Science and Technique Beijing Beijing 100083 China Metal Forming Department Northeastern University Shenyang 110006 China anshan automobile fittings factory Anshan 114014 China

The interfacial status of the steel-aluminum solid to liquid bonding plates (their steel plate surfaces were or were not immersed in flux aqueous solution) were measured by using SEM (Scanning Electron Microscope) and X-ray diffraction . The results showed that the layer of flux (the minimum thickness was 15 μm on the steel plate surface) could protect the steel plate surface from oxidizing effectively at high temperature in solid to liquid bonding. The melt temperatUre of the flux should be lower than 580 ℃ so that it could be melted and removed completely. No. 1 flux (patent product made by the author) made up of halogeindes could also force liquid aluminum to infiltrate into steel plate surface and thus the interfacial shear strength of the bonding plate was rather large.

关键词： steel-aluminum solid to liquid bonding plate steel plate surface immerse, flux, melt temperature interfacial shear shrength

Relationship between interfacial structure and property of steel-mushy Al-28Pb bonding pate

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Journal of Central South University of Technology 2006年第1期13卷 12-16页

作者：张鹏杜云慧刘汉武张君曾大本巴立民 Department of Mechanical Engineering Beijing Jiaotong University Beijing 100044 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China anshan automobile fittings factory Anshan 114014 China

The interfacial properties of steel-mushy Al-28Pb bonding plate with different interfacial structures, and the influence of ratio of Fe-Al compound at the interface on interfacial shear strength were investigated. The results show that there is a nonlinear relationship between the ratio of Fe-Al compound at the interface and the interfacial shear strength. When the ratio of Fe-Al compound at the interface is smaller than 71.4%, with the increase of the ratio of Fe-Al compound at the interface, the interfacial shear strength increases gradually; when the ratio of Fe-Al compound at the interface is larger than 71.4%, with the increase of the ratio of Fe-Al compound at the interface, the interfacial shear strength decreases continuously; when the ratio of Fe-Al compound at the interface is 71.4%, the largest interfacial shear strength 70.2MPa is obtained.

关键词： interfacial structure ratio of Fe-Al compound interfacial shear strength

Effect of solid fraction on steel-mushy Cu-graphite pressing bonding

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中国有色金属学会会刊：英文版 2004年第5期14卷 918-921页

作者：张鹏杜云慧刘汉武曾大本崔建忠巴立民 Department of Mechanical Engineering Beijing Jiaotong University Beijing 100044 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Metal Forming Department Northeastern University Shenyang 110006 China anshan automobile fittings factory Anshan 114014 China

The pressing bonding of steel plate to QTi3.5-3.5graphite slurry was studied. The bonding conditions were 620 ℃ for preheating temperature of steel plate, 530 ℃ for preheating temperature of dies, 50 MPa for pressure and 2 min for pressing time. The relationship between the solid fraction of QTi3.5-3.5graphite slurry and the interfacial mechanical property of bonding plate was obtained. The results show that when the solid fraction of QTi3.5-3.5graphite slurry is smaller than 45.8%, the interfacial shear strength of bonding plate increases with the increasing of solid fraction. When the solid fraction is larger than 45.8%, the interfacial shear strength decreases with the increasing of solid fraction. When the solid fraction is 45.8%, the largest interfacial shear strength of bonding plate 127 MPa can be got, and the interface is made up of Fe-Cu solid solution.

关键词：铜合金钢背金属轴承 QTi3.5-3.5 石墨浆压力加工工艺

Influence of Pressing Time on Steel-copper-graphite Bonding

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Journal of Materials Science & Technology 2006年第2期22卷 235-238页

作者： Peng ZHANG Yunhui DU Hanwu LIU Jun ZHANG Daben ZENG Jianzhong CUI Limin BA Department of Mechanical Engineering Beijing Jiaotong University Beijing 100044 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Metal Forming Department Northeastern University Shenyang 110506 China anshan automobile fittings factory Anshan 114014 China

The bonding of steel plate with QTi3.5-3.5 graphite slurry was studied by using pressing bonding technique. The influence of pressing time on the interracial mechanical property of bonding plate was researched. The results show that： under the conditions of 620℃ preheating temperature of steel plate, 530℃ preheating temperature of dies, 46% solid fraction of QTi3.5-3.5 graphite slurry and 50 MPa pressure, there exists a nonlinear relationship between pressing time and interracial shear strength. The interracial shear strength of bonding plate increases with increasing pressing time and reaches a largest value about 127 MPa when pressing time is longer than 120 s. At the interface with the best mechanical property, there exists a continuous Fe-Cu inter-diffusion zone and a metallurgical bonding.

关键词： Steel-copper-graphite bonding Pressing time Interracial shear strength