Preparation of Cladding Billet via Direct Chill Casting Process

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY 稀有金属材料与工程 Pub Date : 2018-11-01 DOI:10.1016/S1875-5372(18)30239-X
Guo Jing , Han Xing , Teng Yingxue , Wang Hongbin , Zhang Haitao , Nong Deng
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Abstract

A mathematic model was built to describe the cladding casting process and the casting parametric influence on the cladding billet. The effect of casting speed, casting temperature and internal cooling water rate on the casting process performance was discussed. Based on the numerical simulation results, the cladding billet was prepared successfully. Moreover, the model was verified by the temperature measurements during the cladding casting process. The interfacial characteristics were investigated by metallographic examination, energy dispersive spectrometer and universal testing machine. The results show that there is a good agreement between the measured and calculated results. The comprehensively considered casting process is: casting speed 100 mm/min, internal cooling water rate 35 L/min, casting temperature 1020 K (AA4045) and 1000 K (AA3003). Based on the simulation results, the AA4045/AA3003 cladding billet with no defects and Φ140 mm/Φ110 mm in size is fabricated successfully. A diffusion layer with 15 μm in width is formed around the bonding interface. The interfacial bonding strength is 107.3 MPa, higher than that of AA3003, indicating that the two alloys have been bonded metallurgically.

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直接冷铸工艺制备熔覆方坯
建立了熔覆铸造过程的数学模型,描述了浇注参数对熔覆方坯的影响。讨论了浇注速度、浇注温度和内冷却水速率对浇注工艺性能的影响。根据数值模拟结果,成功制备了熔覆方坯。并通过熔覆铸造过程的温度测量对模型进行了验证。采用金相检验、能谱仪和万能试验机对界面特征进行了研究。结果表明,实测结果与计算结果吻合较好。综合考虑的铸造工艺为:铸造速度100mm /min,内冷却水流速35l /min,铸造温度1020k (AA4045), 1000k (AA3003)。在此基础上,成功制备了尺寸为Φ140 mm/Φ110 mm、无缺陷的AA4045/AA3003熔覆方坯。在键合界面周围形成了直径为15 μm的扩散层。界面结合强度为107.3 MPa,高于AA3003,表明两种合金已进行了冶金结合。
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来源期刊
稀有金属材料与工程
稀有金属材料与工程 工程技术-材料科学:综合
CiteScore
1.30
自引率
57.10%
发文量
17973
审稿时长
4.2 months
期刊介绍:
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