S31000不锈钢表面激光熔覆Stellite12合金层的组织和性能

doi:10.13251/j.issn.0254-6051.2023.02.045

摘要/Abstract

摘要： 针对高温阀门密封副易发生擦伤、碰伤等问题,采用激光熔覆技术在S31000不锈钢密封副基体表面制备了Stellite12合金层。通过光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪、显微硬度计及均匀腐蚀全浸试验,研究了熔覆层微观组织、显微硬度和均匀腐蚀性能。结果表明,熔覆层与基体形成了良好的冶金结合,微观组织主要由平面晶、柱状晶和等轴晶的枝晶结构组成。熔覆层显微硬度较高,平均显微硬度为600.68 HV0.3;基体的显微硬度最低,平均显微硬度为204.57 HV0.3。相比于S31000不锈钢的腐蚀速率,表面激光熔覆Stellite12合金后,腐蚀速率显著降低。同时,S31000不锈钢表现出尺寸不均的腐蚀坑现象,Stellite12合金层表现出较均匀的腐蚀行为,但在晶界处的腐蚀现象比晶内更为明显。

关键词: 高温阀门, 激光熔覆, 微观组织, 显微硬度, 均匀腐蚀性能

Abstract: Aiming at the problems that high-temperature valve sealing pair was easier to be scratched and bruised, Stellite12 alloy layer was prepared on the surface of S31000 stainless steel sealing pair by laser cladding technology. The microstructure, microhardness and uniform corrosion property of the clad layer were studied by optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction, microhardness tester and uniform corrosion full immersion test. The results show that the clad layer forms a good metallurgical bond with the substrate, and the microstructure is mainly composed of dendrite structures of planar crystal, columnar crystal and equiaxed crystal. The microhardness of the clad layer is relatively high, with the average microhardness of 600.68 HV0.3, while the microhardness of the substrate is the lowest, with the average microhardness of 204.57 HV0.3. Compared with that of the S31000 stainless steel substrate, the corrosion rate is significantly reduced after laser cladding the Stellite12 alloy on it. At the same time, the S31000 stainless steel shows the phenomenon of corrosion pits with uneven size, while the Stellite12 alloy layer shows a relatively uniform corrosion behavior, though the corrosion phenomenon on the grain boundary is more obvious than that in the interdendrites.

Key words: high-temperature valve, laser cladding, microstructure, microhardness, uniform corrosion property

中图分类号:

TG178

陈林, 蒋永兵, 尚洪宝, 李黎, 张鹏奇, 荆仁荣. S31000不锈钢表面激光熔覆Stellite12合金层的组织和性能[J]. 金属热处理, 2023, 48(2): 289-294.

Chen Lin, Jiang Yongbing, Shang Hongbao, Li Li, Zhang Pengqi, Jing Renrong. Microstructure and properties of laser clad Stellite12 alloy layer on S31000 stainless steel[J]. Heat Treatment of Metals, 2023, 48(2): 289-294.

参考文献

[1]林振浩, 钱锦远, 李文庆, 等. 高温阀门的研究进展[J]. 机电工程, 2020, 37(7): 729-735.
Lin Zhenhao, Qian Jinyuan, Li Wenqing, et al. Research progress of high temperature valves[J]. Journal of Mechanical & Electrical Engineering, 2020, 37(7): 729-735.
[2]Shoji Takada, Kenji Abe, Yoshiyuki Inagaki. Conceptual structure design of high temperature isolation valve for high temperature gas cooled reactor[J]. Journal of Engineering for Gas Turbines and Power, 2011, 133(11): 45011-45013.
[3]姚怀宇, 蒋诚航, 金志江, 等. 阀门失效的研究进展[J]. 流体机械, 2021, 49(10): 74-83, 90.
Yao Huaiyu, Jiang Chenghang, Jin Zhijiang, et al. Research progress on valve failure[J]. Fluid Machinery, 2021, 49(10): 74-83, 90.
[4]于龙杰, 钱锦远, 金志江. 阀门密封性能的研究进展[J]. 润滑与密封, 2021, 46(9): 134-142, 153.
Yu Longjie, Qian Jinyuan, Jin Zhijiang. Research progress on sealing performance of valve[J]. Lubrication Engineering, 2021, 46(9): 134-142, 153.
[5]安辉, 张爽松. 蒸馏装置应用SF-5T合金作阀门的密封面材料抵抗环烷酸腐蚀[J]. 石油炼制与化工, 2002, 33(10): 48-51.
An Hui, Zhang Shuangsong. Applying SF-5T alloy as valve sealing material to resist naphthenic acid corrosion in distillation unit[J]. Petroleum Processing and Petrochemicals, 2002, 33(10): 48-51.
[6]时兵, 金烨. 600 MW汽轮机组再热主汽阀门阀杆的热胀及其影响[J]. 动力工程学报, 2008, 28(4): 573-578.
Shi Bing, Jin Ye. Study on the stem heat expansion and Its influence of the reheat stop valve in 600 MW steam turbine unit[J]. Journal of Power Engineering, 2008, 28(4): 573-578.
[7]Shaikh Asad Ali Dilawary, Amir Motallebzadeh, Ahmet Hilmin Paksoy, et al. Influence of laser surface melting on the characteristics of Stellite 12 plasma transferred arc hardfacing deposit[J]. Surface and Coatings Technology, 2017, 317: 110-116.
[8]Amir Motallebzadeh, Shaikh Asad Ali Dilawary, Erdem Atar, et al. High-temperature oxidation of Stellite 12 hardfacings: Effect of Mo on characteristics of oxide scale[J]. Journal of Materials Engineering and Performance, 2019, 28(1): 463-474.
[9]Alexander Renz, Braham Prakash, Jens Hardell, et al. High-temperature sliding wear behaviour of Stellite(R) 12 and Tribaloy(R) T400[J]. Wear, 2018, 402: 148-159.
[10]苗文卷, 曹睿, 车洪艳, 等. Stellite 12钴基合金的疲劳性能及其断裂机理研究[J]. 材料工程, 2021, 49(1): 153-159.
Miao Wenjuan, Cao Rui, Che Hongyan, et al. Fatigue properties and fracture mechanism of Stellite12 cobalt-based alloy[J]. Journal of Materials Engineering, 2021, 49(1): 153-159.
[11]Anas Ahmad Siddiqui, Avanish Kumar Dubey. Recent trends in laser cladding and surface alloying[J]. Optics and Laser Technology, 2021, 134: 106619.
[12]Cui Chen, Wu Meiping. Investigation of the friction and corrosion behavior of laser-clad cobalt-based coatings in sea water[J]. Metal Science and Heat Treatment of Metals, 2021, 63(7): 444-448.
[13]徐国建, 黄雪, 杭争翔, 等. 激光和TIG堆焊钴基合金的性能[J]. 焊接学报, 2013, 34(8): 22-26, 114.
Xu Guojian, Huang Xue, Hang Zhengxiang, et al. Characteristics of Co-based clad layer formed by laser and TIG cladding[J]. Transactions of the China Welding Institution, 2013, 34(8): 22-26, 114.
[14]姚宁娟, 陆伟, 陈铠, 等. 激光熔覆技术制造热轧辊的钴基合金层研究[J]. 中国激光, 2003, 30(8): 759-762.
Yao Ningjuan, Lu Wei, Chen Kai, et al. Study on Co-based alloy coatings of hot roller made by laser cladding[J]. Chinese Journal of Lasers, 2003, 30(8): 759-762.
[15]陈浩, 刘传云, 潘春旭, 等. 激光熔覆钴基合金的凝固组织特征及性能研究[J]. 金属热处理, 2001, 26(12): 10-13.
Chen Hao, Liu Chuanyun, Pan Chunxu, et al. Study on solidification microstructure and properties of cobalt-based alloy laser cladding layer[J]. Heat Treatment of Metals, 2001, 26(12): 10-13.
[16]刘福广, 李勇, 杨二娟, 等. 超(超)临界核阀用耐热钢激光熔覆钴基合金修复研究[J]. 激光与光电子学进展, 2021, 58(5): 220-228.
Liu Fuguang, Li Yong, Yang Erjuan, et al. A research on laser cladding Co-based alloy to repair heat resistant steel of the valves used in ultra-super critical nuclear power plants[J]. Laser & Optoelectronics Progress, 2021, 58(5): 220-228.
[17]Song Boxue, Yu Tianbiao, Jiang Xingyu, et al. Development mechanism and solidification morphology of molten pool generated by laser cladding[J]. International Journal of Thermal Sciences, 2021, 159: 106579.
[18]Chen Liaoyuan, Zhao Yu, Song Boxue, et al. Modeling and simulation of 3D geometry prediction and dynamic solidification behavior of Fe-based coatings by laser cladding[J]. Optics and Laser Technology, 2021, 139: 107009.
[19]Xiang Sisi, Mao Shengcheng, Shen Zheju, et al. Site preference of metallic elements in M₂₃C₆ carbide in a Ni-based single crystal superalloy[J]. Materials & Design, 2017, 129: 9-14.
[20]颜鸣皋, 陈学印. 镍基高温合金的强化[J]. 金属学报, 1964, 7(3): 307-321.
Yan Mingkao, Chen Xueying. On the strengthening of nickel-base superalloys[J]. Acta Metallurgica Sinica, 1964, 7(3): 307-321.
[21]Ding Y P, Liu R, Wang L, et al. Corrosion and wear performance of Stellite alloy hardfacing prepared via laser cladding[J]. Protection of Metals and Physical Chemistry of Surfaces, 2020, 56(2): 392-404.
[22]史胜凤, 林军, 周炳, 等. 医用钴基合金的组织结构及耐腐蚀性能[J]. 稀有金属材料与工程, 2007, 36(1): 37-41.
Shi Shengfeng, Lin Jun, Zhou Bing, et al. Microstructure and corrosion resistance of medical cobalt-based alloys[J]. Rare Metal Materials and Engineering, 2007, 36(1): 37-41.
[23]张志伟, 刘素芬, 李兆杰, 等. 304奥氏体不锈钢腐蚀失效原因分析及组织表征[J]. 金属热处理, 2019, 44(S1): 96-102.
Zhang Zhiwei, Liu Sufen, Li Zhaojie, et al. Cause analysis and microstructure characterization of corrosion failure of 304 austenitic stainless steel[J]. Heat Treatment of Metals, 2019, 44(S1): 96-102.
[24]张庆. 热处理对AISI 310S不锈钢在不同介质中的腐蚀磨损行为的影响[D]. 镇江: 江苏大学, 2016.
Zhang Qing. Effect of heat treatment on the corrosion-wear behavior of AISI 310S stainless steels in different medium[D]. Zhenjiang: Jiangsu University, 2016.
[25]Liu Rong, Yao Jianhua, Zhang Qunli, et al. Effects of molybdenum content on the wear/erosion and corrosion performance of low-carbon Stellite alloys[J]. Materials & Design, 2015, 78: 95-106.