不同微观组织低合金钢模拟海水浆体冲蚀磨损行为的对比

doi:10.13251/j.issn.0254-6051.2024.01.009

金属热处理 ›› 2024, Vol. 49 ›› Issue (1): 61-68.DOI: 10.13251/j.issn.0254-6051.2024.01.009

不同微观组织低合金钢模拟海水浆体冲蚀磨损行为的对比

任武彬¹, 麻衡², 崔绍华³, 王孟虎¹, 梁小凯¹, 孙新军¹

1. 钢铁研究总院有限公司工程用钢研究院, 北京 100081;
2. 莱芜钢铁集团银山型钢有限公司, 山东济南 271105;
3. 国家石油天然气管网集团有限公司, 北京 100013

收稿日期:2023-08-08 修回日期:2023-11-16 发布日期:2024-02-29
通讯作者: 孙新军,教授级高工, 博士, E-mail: sunxinjun@cisri. com.cn
作者简介:任武彬(1998—), 男, 硕士研究生, 主要研究方向为新型耐磨钢的开发, E-mail:2289663242@qq.com。

Comparison of simulated seawater slurry erosion and wear behavior of low alloy steel with different microsturcture

Ren Wubin¹, Ma Heng², Cui Shaohua³, Wang Menghu¹, Liang Xiaokai¹, Sun Xinjun¹

1. Research Institute of Structural Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China;
2. Yinshan Section Steel Co., Ltd., Laiwu Steel Group, Ji'nan Shandong 271105, China;
3. China Oil and Gas Pipeline Network Corporation, Beijing 100013, China

Received:2023-08-08 Revised:2023-11-16 Published:2024-02-29

摘要/Abstract

摘要： 以不同热处理工艺得到的双相钢和全马氏体钢为研究对象,利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)对其组织进行了精细表征,通过动电位极化曲线、电化学阻抗谱(EIS)对比研究其耐海水腐蚀性能,采用MSH冲蚀磨损试验机分析其在模拟海水砂浆中的冲蚀磨损行为,并用白光干涉仪对冲蚀磨损表面形貌进行了表征。结果表明,双相钢的组织以马氏体为基体,铁素体体积分数为9.8%±0.6%;全马氏体钢组织为单一板条马氏体。相比于全马氏体钢,双相钢具有较低的屈服强度、抗拉强度、硬度和耐蚀性,但表现出更高的耐磨蚀性能。究其原因,双相钢中马氏体相的显微硬度显著高于全马氏体钢,软硬相的协调使微裂纹在双相钢中难以扩展,从而使磨蚀质量损失减少。

关键词: 磨损, 腐蚀, 磨蚀, 马氏体/铁素体双相钢, 全马氏体钢

Abstract: Microstructure of the dual-phase steel and fully martensitic steel was characterized by using optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The corrosion resistance of this two steels was studied by means of potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). The erosion corrosion behavior of the steels in simulated seawater mortar environment was analyzed by means of MSH erosion corrosion testing machine, and the surface morphology was characterized by using white light interferometer. The results show that the microstructure of the dual-phase steel is martensite matrix with ferrite volume fraction of 9.8%±0.6%.The microstructure of the fully martensitic steel is single lath martensite. Compared with fully martensitic steel, dual-phase steel has lower yield strength, tensile strength, hardness and corrosion resistance, but shows higher erosion-corrosion resistance. The reason is that the microhardness of martensitic phase in dual-phase steel is significantly higher than that of fully martensitic steel, and the coordination of soft and hard phases makes it difficult for microcracks to propagate in dual-phase steel, thus reducing the erosion-corrosion mass loss.

Key words: erosion, corrosion, erosion-corrosion, martensitic/ferrite dual-phase steel, fully martensitic steel

中图分类号:

TG142.1

任武彬, 麻衡, 崔绍华, 王孟虎, 梁小凯, 孙新军. 不同微观组织低合金钢模拟海水浆体冲蚀磨损行为的对比[J]. 金属热处理, 2024, 49(1): 61-68.

Ren Wubin, Ma Heng, Cui Shaohua, Wang Menghu, Liang Xiaokai, Sun Xinjun. Comparison of simulated seawater slurry erosion and wear behavior of low alloy steel with different microsturcture[J]. Heat Treatment of Metals, 2024, 49(1): 61-68.

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不同微观组织低合金钢模拟海水浆体冲蚀磨损行为的对比

Comparison of simulated seawater slurry erosion and wear behavior of low alloy steel with different microsturcture

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