Effect of Aging Treatment on Properties and Post-weld Microstructure of Stainless Steel Containing Niobium

作     者：Liu Tianzeng Zhao Yanchun Chen Anzhong Yu Zhiqi Feng Li Li Jucang Pan Jixiang 刘天增;赵燕春;陈安忠;于志琦;冯力;李具仓;潘吉祥

作者机构：State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhou 730050China Gansu Jiu Steel Group Hongxing Iron&Steel Co.LtdJiayuguan 735100China 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2025年第54卷第1期

页      面：39-49页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Science and Technology Program Project of Gansu Province(21ZD3GB001) 

主　　题：aging 347H stainless steel precipitated phase mechanical properties molten salt corrosion welding property 

摘      要：The effects of different aging processes on the precipitated phase,mechanical properties,molten salt corrosion resistance and post-weld microstructure of 347H stainless steel were *** results show that a large number of precipitated phases appear in the crystal after aging at 700℃for 400 *** aging for 3000 h,the number of precipitated phases increases and most of them are gathered at the grain *** are two forms of precipitates,one is the coarse precipitate rich in Cr,and the other is the smaller precipitates mainly consisting of *** aging at 700℃for 30 min,the yield strength and tensile strength of the samples at room temperature and 593℃increase,but the elongation *** corrosion results in nitrate at 565℃show that the corrosion products of the aged samples are the same as that of the original samples,which are Fe_(2)O_(3),Fe_(3)O_(4),MgCr_(2)O_(4),MgFe_(2)O_(4),FeCr_(2)O_(4) and NaFeO_(2).The proportion of Fe_(3)O_(4) that is dense and well bonded to the subtrate in the original sample is higher than that in the aged sample,so the corrosion resistance is *** 700℃,the aging time has no obvious effect on the microstructure after welding.