余热回收系统中筒形件58SiMn组织性能

The Structure Property of Tube 58SiMn in Waste Heat Recovery System

目的探讨东基集团余热回收系统中筒型结构件(58SiMn钢材)余热回收时组织性能变化,为基于热泵系统的回收工艺做必要的准备以及以沈阳的东基集团余热回收系统回收的热量用于加热职工洗浴用水和蒸汽锅炉补偿水的可行性.方法基于热泵技术基础之上的余热回收系统进行了分析(包括系统的组成、工作原理、热工参数等).建立余热回收系统,测定了生产现场随季节变化的筒型件冷却过程,确定了以组织分析方法为主的研究手段,对筒型件进行了不同温度(750～850℃)加热透热时间2 min,转变为稳定组织的保温时间为10 min,然后进行空冷的处理,最后对样品进行金相观察.比较处理前后的组织变化.结果在筒型件970℃开始余热回收将不会降低其力学性能,反而力学性能会得到进一步的改善.结论结果说明所设计的筒型体结构件在生产过程中的热泵式余热回收系统是合理的.

This paper studied changes of the structure property in the cartridge type structures （58SiMn steel） in waste heat recovery system. It made the necessary preparation for the recycling process of the heat pump and provided the possibility of using the recycled calories to provide bath water and compensation for steams boilers. The waste heat recovery system which is based on heat pump was analyzed, including the system composition, working principle, the thermal parameters, etc. After setting up the waste heat recovery system and measuring the cylinder parts＇ cooling processes which changed with the seasons on the spot, an organiza- tional -analysis-dominant research method was determined. Type of the tube was conducted from different heating temperatures（750℃ - 850 ℃ ） through the thermal time 2 rain,into a stable organization holding time of 10min, and after that, the metallographic microstructure of the samples was observed. Finally, chan- ges of the samples before and after the heating treatment were compared and analyzed. Based on the analy- sis ,results have proved that the mechanical property of the cartridge type structures can not to be brought down after 970 ℃ in the waste heat recovery system. Instead, the mechanical property will be further im- proved. This research shows that waste heat recovery system which is used in the production of the cartridgetype structures is effectual.