挤压法制备钛铜复合棒工艺研究
发布时间：2019-03-17 13:37
【摘要】：钛铜复合棒在电解及氯碱制造等工业中得到了广泛的应用。目前制备钛铜复合棒的方法主要为爆炸焊接+轧制复合法和挤压+拉拔复合法。本文首次提出了用直接挤压法制备钛铜复合棒,并设计出满足要求的挤压模具,研究了直接挤压复合法制备钛铜复合棒的工艺参数及界面结合机理。 根据钛、铜两种金属的加工特性,结合产品断面尺寸,从材料选定、模具外形、模角、孔型、入口圆角R、工作带长度、延伸孔型系统等方面入手,设计出了φ32×14×1.5mm鼓形、68×11×1.5mm矩形的两种钛铜复合棒挤压模具。在研究挤压工艺参数对挤压复合过程的影响时,重点探讨了挤压温度以及挤压速度的影响。实验表明,在760℃~800℃温度范围内,以80mm/s~120mm/s的速度,挤压过程能够顺利进行。为了防止发生共晶反应,挤压温度不应超过820℃;否则会造成界面生成有害的金属间化合物,影响界面质量。 直接挤压法制备的钛铜复合棒表面光洁,覆层钛厚度均匀。通过对挤压法制备的钛铜复合棒界面进行金相组织分析,经超声波检测、拉剪实验、显微硬度等进行表征,并比较结合强度,其结合强度与纯铜的拉伸强度接近,证明其复合界面实现了冶金结合。直接法制备钛铜复合棒主要有两种结合机理:一种为机械作用机制,主要通过挤压力作用使钛铜两种金属在强烈的三向压应力作用发生强烈的塑性变形,表面扩展产生新鲜表面而实现初步结合,新鲜表面的多少是影响挤压结合的主要因素之一,这可以通过金属挤压比的调整得以改善;第二种结合机理为扩散机制,主要在挤压复合后冷却退火过程中,随着挤压温度的升高,扩散过程进行的较充分。 理论分析和实验研究表明,用直接挤压法制备钛铜复合棒的工艺是可行的,并且也是较好的一种复合方法。所设计的挤压模具有效合理,制备的钛铜复合棒各方面性能均满足GB/T12769-2003技术标准要求。研究得到的数据对大规模挤压制备钛铜复合棒具有一定的指导意义。
[Abstract]:Titanium-copper composite rod has been widely used in industry such as electrolysis and chlor-alkali manufacturing. At present, the main methods of preparing Ti-Cu composite rod are explosive welding rolling method and extruding drawing composite method. In this paper, titanium-copper composite rod was prepared by direct extrusion method for the first time, and extrusion die was designed to meet the requirements. The technological parameters and interface bonding mechanism of titanium-copper composite rod prepared by direct extrusion composite method were studied. According to the processing characteristics of titanium and copper, the 蠁 32 脳 14 脳 1.5mm drum shape is designed from the aspects of material selection, die shape, die angle, pass type, inlet fillet R, length of working band, extended pass system and so on according to the processing characteristics of titanium and copper, combined with the cross section size of the product. Two kinds of extrusion dies for titanium-copper composite rod with 68 脳 11 脳 1.5mm rectangle were developed. In order to study the influence of extrusion process parameters on extrusion process, the effects of extrusion temperature and extrusion speed are discussed. The experimental results show that the extrusion process can proceed smoothly at the speed of 80mm/s~120mm/s in the temperature range of 760C ~ 800C. In order to prevent eutectic reaction, the extrusion temperature should not exceed 820 鈩，
本文编号：2442354
[Abstract]:Titanium-copper composite rod has been widely used in industry such as electrolysis and chlor-alkali manufacturing. At present, the main methods of preparing Ti-Cu composite rod are explosive welding rolling method and extruding drawing composite method. In this paper, titanium-copper composite rod was prepared by direct extrusion method for the first time, and extrusion die was designed to meet the requirements. The technological parameters and interface bonding mechanism of titanium-copper composite rod prepared by direct extrusion composite method were studied. According to the processing characteristics of titanium and copper, the 蠁 32 脳 14 脳 1.5mm drum shape is designed from the aspects of material selection, die shape, die angle, pass type, inlet fillet R, length of working band, extended pass system and so on according to the processing characteristics of titanium and copper, combined with the cross section size of the product. Two kinds of extrusion dies for titanium-copper composite rod with 68 脳 11 脳 1.5mm rectangle were developed. In order to study the influence of extrusion process parameters on extrusion process, the effects of extrusion temperature and extrusion speed are discussed. The experimental results show that the extrusion process can proceed smoothly at the speed of 80mm/s~120mm/s in the temperature range of 760C ~ 800C. In order to prevent eutectic reaction, the extrusion temperature should not exceed 820 鈩，
本文编号：2442354
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