国产MSR翅片管的试制与性能

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中图分类号：TG455；TM263 文献标志码：A

Trial manufacture and performance of domestic MSR finned tubes

FANG Yanbing1， ZHAO Guannan²， JI Hai1， CAO Jian³， WANG Yongdong²， WANG Hongchang²， JIAO Ming²， LIAO Jiaqi²， LI Jinghuai2 （1. Zhejiang Jiuli Special Metal Tech Co.，Ltd.，Huzhou 313012，China; 2.Shanghai Nucleer EngineerResearchand Design Institute， Shanghai20o233， China; 3.Shanghai Electric PowerPlant Components Co.， Shanghai 201306， China）

Abstract： In view of the current situation that the TP439 finned tube used in the steam-water separation reheater （MSR） is completely dependent on imports， the localization research and development work has been carried out using the conditions of domestic manufacturers. The purpose of this paper is to use domestic and imported raw material strips to produce TP439 finned tubes separately，and compare them with imported products to illustrate the performance level of domestic finned tubes. By using laser beam weld， the weld formation and structure were optimized. The change of tensile properties of 439 alloy strip during processng into finned tubes was studied， the chemical compositions of domestic and imported strips were compared， and the mechanical properties of finned tubes trial-produced by domestic and imported strips were compared. Grain refinement strengthening is the main reason for the higher strength of domestic strips，and the precipitation of carbides caused by heat treatment in the manufacturing process of finned tubes leads to higher yield and tensile strength of imported finned tubes.The fin shape of the domestic finned tube is basically the same as that of the imported product， but the lower yield strength reflects the stronger resistance to stress corrosion cracking of the domestic finned tube.

Keywords： MSR; finned tubes;domestication

核电是一种有良好应用前景的清洁能源。（剩余7255字）