Chen Zejun, Han Huiquan, Ren Wei, Huang Guangjie
State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
CISDI Engineering Co., Ltd., Chongqing, 400013, China.
PLoS One. 2015 Jul 22;10(7):e0131574. doi: 10.1371/journal.pone.0131574. eCollection 2015.
On-line spray water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and critical procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially the impact properties of the weld joint. In this paper, an annular OSWC process is investigated based on an experimental simulation platform that can obtain precise real-time measurements of the temperature of the pipe, the water pressure and flux, etc. The effects of the modes of annular spray water cooling and related cooling parameters on the mechanical properties of the pipe are investigated. The temperature evolutions of the inner and outer walls of the pipe are measured during the spray water cooling process, and the uniformity of mechanical properties along the circumferential and longitudinal directions is investigated. A heat transfer coefficient model of spray water cooling is developed based on measured temperature data in conjunction with simulation using the finite element method. Industrial tests prove the validity of the heat transfer model of a steel pipe undergoing spray water cooling. The research results can provide a basis for the industrial application of the OSWC process in the production of ERW steel pipes.
电阻焊（ERW）钢管的在线喷水冷却（OSWC）可以取代传统的离线热处理工艺，成为一个重要且关键的工序。在线喷水冷却工艺提高了生产效率，降低了成本，并提高了ERW钢管的机械性能，尤其是焊缝的冲击性能。本文基于一个能够精确实时测量钢管温度、水压和流量等的实验模拟平台，对环形在线喷水冷却工艺进行了研究。研究了环形喷水冷却方式及相关冷却参数对钢管机械性能的影响。在喷水冷却过程中测量了钢管内外壁的温度变化，并研究了沿圆周和纵向方向机械性能的均匀性。基于实测温度数据，结合有限元模拟，建立了喷水冷却的传热系数模型。工业试验验证了钢管喷水冷却传热模型的有效性。研究结果可为在线喷水冷却工艺在ERW钢管生产中的工业应用提供依据。
