固溶和稳定化处理后Zr-Mo微合金化310S不锈钢的显微组织和耐腐蚀性能
Microstructure and Corrosion Resistance of Zr-Mo Micro-alloying 310S Stainless Steel after Solution and Stabilization Treatment
摘 要
制备了Zr-Mo微合金化310S不锈钢并进行了不同温度（1 050~1 150℃）固溶处理以及1 150℃固溶+不同温度（950~1 1050℃）稳定化处理，研究了不同热处理后试验钢的显微组织和耐腐蚀性能。结果表明：固溶处理后，试验钢的显微组织为均匀的奥氏体等轴晶，且晶粒内有大量退火孪晶，晶界或晶内析出条状或球形颗粒状（Zr，Mo） C相和块状Zr （C，N）相；1 150℃固溶+不同温度稳定化处理后试验钢的显微组织与固溶态的相似，但析出相数量增多，且在950℃稳定化处理后，晶界上析出了大量的链球状M23C6相；950~1 050℃的稳定化处理对试验钢的耐均匀腐蚀性能影响不大；随着稳定化温度的升高，试验钢的晶间腐蚀敏感性降低，耐晶间腐蚀能力增强。
微合金化
固溶处理
稳定化处理
晶间腐蚀
310S stainless steel
micro-alloying
solution treatment
stabilization treatment
inter-granular corrosion
Abstract
Zr-Mo micro-alloyed 310S stainless steel was prepared and treated by solution at different temperatures (1 050-1 150 ℃), and by solution at 1 150 ℃+stabilization at different temperatures (950-1 050 ℃). The microstructure and corrosion resistance of the test steel treated with different heat treatment were studied. The results show that the microstructure of the tested steel after solution was uniform austenite equiaxed grains, and there were a large number of annealing twins in the grains; strip-shaped or clumpy (Zr, Mo) C phase and massive Zr(C,N) phase precipitated from the grain boundaries or grains. The microstructure of the tested steel after solution treatment at 1 150 ℃ and stabilization treatment at different temperatures was similar to that after solution treatment, but the number of precipitated phases increased; a large number of hammer-like M23 C6 phase precipitated from the grain boundaries after stabilization treatment at 950 ℃. Stabilization treatment at 950-1 050 ℃ had little effect on the uniform corrosion resistance of tested steel. With the increase of stabilization temperature, the inter-granular corrosion sensitivity of the tested steel decreased, and inter-granular corrosion resistance was improved.
中图分类号 TG142.7 DOI 10.11973/jxgccl201809006
所属栏目 试验研究
基金项目 国家国际科技合作专项项目（2015DFR60370）；中央高校基本科研业务费资助项目（DUT17GF209）
收稿日期 2018/3/12
修改稿日期 2018/8/15
网络出版日期
作者单位点击查看
备注刘桂良(1982-),男,重庆人,副研究员,硕士
引用该论文: LIU Guiliang,WU Tianyang,LI Minghao,PAN Qianfu,TANG Rui,CHEN Guoqing,WANG Qing. Microstructure and Corrosion Resistance of Zr-Mo Micro-alloying 310S Stainless Steel after Solution and Stabilization Treatment[J]. Materials for mechancial engineering, 2018, 42(9): 26～32
刘桂良,武天洋,李明浩,潘钱付,唐睿,陈国清,王清. 固溶和稳定化处理后Zr-Mo微合金化310S不锈钢的显微组织和耐腐蚀性能[J]. 机械工程材料, 2018, 42(9): 26～32
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【3】WASG S, AMPORNRAT P, GUPTA G, et al. Corrosion and stress corrosion cracking in supercritical water[J]. Journal of Nuclear Materials, 2007, 371(1/2/3):176-201.
【4】沈朝,张乐福,朱发文,等. 超临界水冷堆燃料包壳候选材料的耐腐蚀性能[J]. 中国腐蚀与防护学报,2014, 34(4):301-306.
【5】MSUYAMA F. History of power plants and progress in heat resistant steels[J]. ISIJ International, 2001, 41(6):612-625.
【6】BAINDUR S. Materials challenges for the supercritical water-cooled reactor (SCWR)[J]. Bulletin of the Canadian Nuclear Society, 2008, 29(1):32-38.
【7】蔡珍,韩斌,谭文,等. 钛微合金化技术发展现状[J]. 中国冶金,2015,25(2):1-5.
【8】胡心彬,李麟,吴晓春. 铌微合金化在特殊钢中的应用[J]. 金属热处理,2003,28(6):5-10.
【9】薛攀龙,喇培清,刘辉,等. Al对310S耐热钢高温拉伸性能的影响[J]. 钢铁研究学报,2015,27(7):46-51.
【10】SHIGEKI K, KUNIYA J, FUMIHISA K, et al. Material properties of stainless steels modified with addition of zirconium for supercritical water-cooled reactor[C]//Proceedings of ICAPP. Nice:[s.n.], 2007.
【11】KANO F, TSUCHIYA Y, OKA K. Thermal and irradiation effects on high-temperature mechanical properties of materials for SCWR fuel cladding[C]//Proceedings of ICAPP. Tokyo:[s.n.], 2009.
【12】SASIKALA G, RAY S K, MANNAN S L. Kinetics of transformation of delta ferrite during creep in a type 316(N) stainless steel weld metal[J]. Materials Science & Engineering:A, 2003, 359(1/2):86-90.
【13】PIEKARSKI B. Effect of Nb and Ti additions on microstructure and identification of precipitates in stabilized Ni-Cr cast austenitic steels[J]. Materials Characterization, 2001, 47(3/4):181-186.
【14】ISEDA A, OKADA H, SEMBA H, et al. Long term creep properties and microstructure of SUPER304H, TP347HFG and HR3C for A-USC boilers[J]. Energy Materials, 2007, 2(4):199-206.
【15】潘钱付,刘超红,唐睿,等. Ti、Zr微合金化310S不锈钢的制备研究[J]. 核动力工程,2012(增刊2):70-74.
【16】NASSAR H, KOROJY B, FREDRIKSSON H. A study of shell growth irregularities in continuously cast 310S stainless steel[J]. Ironmaking & Steelmaking, 2009, 36(7):521-528.
【17】高福彬,杨吉春. 新型310S耐热钢组织和高温力学性能[J]. 金属热处理,2014,39(11):30-33.
【18】于庆波,张仲波,李子林,等. Nb对低碳钢奥氏体晶粒长大的影响[J]. 钢铁,2006,41(12):70-74.
【19】梁成浩,张国庆. 用电化学技术评价310不锈钢的高温损伤[J]. 金属热处理学报,2000,21(1):20-25.
【20】张义平. 1Cr18Ni9Ti晶间腐蚀及热处理工艺研究[J]. 煤矿机械,2006,27(7):145-147.
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