论文部分内容阅读
为解决双金属复合管固-液铸轧复合(SLCRB)工艺覆层熔体金属的环形均匀稳定布流问题,提出并设计了一种带有三级环形阶梯分流和锥形缓冲的环形布流器,并且基于商用软件Fluent建立了稳态布流过程的流体动力学模型,分析了布流器结构和铸轧速度对系统流场的影响,给出了获得均匀、稳定出口流场的布流器内部结构和布流条件,并用水模实验进行验证。结果表明:布流器内通道高宽比不小于1有利于均匀分流,并且锥形缓冲区的均流缓冲作用至关重要。以1.2m/min的铸轧速度成功制备了外径为38mm、内径为26mm的铅-铝双金属复合管,覆层金属厚度均匀、界面结合效果良好。
In order to solve the problem of annular uniform and steady flow of cladding metal in the solid-liquid casting and rolling composite (SLCRB) process of bimetallic composite pipe, an annular flow distribution with three-stage annular step-split and conical buffer was proposed and designed Based on the commercial software Fluent, the fluid dynamic model of the steady-state flow distribution was established. The influence of the structure of the flow deflector and the casting speed on the flow field of the system was analyzed. The distribution of the flow field Internal structure and flow conditions, and verified by water model experiment. The results show that: the aspect ratio of the flow channel in the flow distributor is not less than 1, which is beneficial to the uniform flow diversion, and the current-sharing buffer in the cone-shaped buffer zone is very important. The lead-aluminum bimetallic composite pipe with an outer diameter of 38mm and an inner diameter of 26mm was successfully fabricated at a casting speed of 1.2m / min. The thickness of the cladding metal was uniform and the interfacial bonding effect was good.