Numerical simulation on quenching process of the large-diameter thick-wall gas cylinder of 30CrMo steel
WANG Ge1,WANG Li-li1,GAO Jing-na1,ZHU Guo-shan1,DU Xiong-fei1,LI Qiang1,2
1. National Engineering Research Center for Equipment and Technology of cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China 2. National Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China
Abstract：A three dimensional coupling model on temperature, microstructure and stress of the 30CrMo large-diameter and thick-wall gas cylinder during quenching process was built with use of finite element numerical simulation technology. Temperature distribution, phase transition and stresses variation of the gas cylinder during quenching processes were investigated. Two quenching processes are compared, i.e. quenching immersed in a water groove and quenching intermittent sprayed inside with continuous water sprayed outside on the cylinder respectively. Numerical simulation results show that the temperature difference between the internal surface and the outside surface of the cylinder was very large and a higher peak value of quenching heat stress emerged during quenching immersed in the water groove, which would lead to a large deformation of the gas cylinder and the shell could not be through hardened completely. The cooling intensity was reasonable under the quenching process by intermittent sprayed inside with continuous water sprayed outside on the gas cylinder. The temperature gradient and the quenching stress were reduced, the quenching distortion was eliminated, the microstructure distribution was improved and the uniformity of microstructure and hardness of the gas would be realized during this quenching process.
王葛，王莉莉，高静娜，朱国善，杜雄飞，李强 . 30CrMo钢大直径厚壁压力气瓶淬火过程数值模拟[J]. 钢铁, 2015, 50(2): 61-69.
WANG Ge,WANG Li-li,GAO Jing-na,ZHU Guo-shan,DU Xiong-fei,LI Qiang,. Numerical simulation on quenching process of the large-diameter thick-wall gas cylinder of 30CrMo steel. Iron and Steel, 2015, 50(2): 61-69.
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2015, Vol. 50 
