何琼,李永刚,朱艳强,杨林滋.深冷处理对X52管线钢耐磨性与耐腐蚀性的影响[J].表面技术,2024,53(8):74-83.
HE Qiong,LI Yonggang,ZHU Yanqiang,YANG Linzi.Effect of Cryogenic Treatment on the Wear and Corrosion Resistance of X52 Pipeline Steel[J].Surface Technology,2024,53(8):74-83 |
| 深冷处理对X52管线钢耐磨性与耐腐蚀性的影响 |
| Effect of Cryogenic Treatment on the Wear and Corrosion Resistance of X52 Pipeline Steel |
| 投稿时间：2023-04-19 修订日期：2023-08-22 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.08.007 |
| 中文关键词: 深冷处理 X52管线钢 显微组织 耐磨性 耐腐蚀性 |
| 英文关键词:cryogenic treatment X52 pipeline steel microstructure wear resistance corrosion resistance |
| 基金项目:国家自然科学基金(51705352);中国博士后科学基金(2018M641682);山西省高等学校科技创新项目(2019L0139) |
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| Author | Institution |
| HE Qiong | College of Mechanical and Vehicle Engineering,Shanxi Provincial Key Laboratory of Precisely Machining, Shanxi Research Center for Metal Material Corrosion and Protection Engineering Technology, Taiyuan University of Technology, Taiyuan 030024, China |
| LI Yonggang | College of Mechanical and Vehicle Engineering,Shanxi Provincial Key Laboratory of Precisely Machining, Shanxi Research Center for Metal Material Corrosion and Protection Engineering Technology, Taiyuan University of Technology, Taiyuan 030024, China |
| ZHU Yanqiang | College of Mechanical and Vehicle Engineering,Shanxi Provincial Key Laboratory of Precisely Machining, Shanxi Research Center for Metal Material Corrosion and Protection Engineering Technology, Taiyuan University of Technology, Taiyuan 030024, China |
| YANG Linzi | College of Mechanical and Vehicle Engineering,Shanxi Provincial Key Laboratory of Precisely Machining, Shanxi Research Center for Metal Material Corrosion and Protection Engineering Technology, Taiyuan University of Technology, Taiyuan 030024, China |
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| 中文摘要: |
| 目的 提高X52管线钢基体的耐磨性能与耐腐蚀性能，探究深冷处理对X52管线钢性能的影响机制。方法 采用液体法的冷处理方式，对X52管线钢进行不同时间的深冷处理。采用显微硬度仪、超景深光学显微镜、扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、摩擦磨损仪器、万能拉伸机以及电化学工作站，分别观察或评价深冷处理后X52管线钢的显微组织、物相组成、硬度变化、拉伸性能、耐磨性与耐腐蚀性能。结果 经过不同时间的深冷处理后，由于弥散碳化物的析出和晶粒细化，试件的显微硬度、抗拉强度和弹性模量均有所提高，但屈服强度变化不明显。当深冷处理时间为30 h时，其显微硬度达到最大值210.8HV0.2，比未深冷态190.3HV0.2提高了10.77%，当深冷处理时间为7 h时，其抗拉强度达到最大值600.7 MPa，比未深冷态574.7 MPa提高了4.05%。经过深冷处理，由于试件的晶粒得到了细化，组织成分更加均匀，试件的摩擦磨损性能得到提高，磨损机理为氧化磨损和磨粒磨损的共同作用，其中磨粒磨损起着主要作用。极化曲线结果显示，深冷处理后的试件自腐蚀电位均正移，当深冷处理时间分别为11、30和55 h时，腐蚀电流密度由未深冷态的15.47×10−6 A/cm2分别降低到1.781×10−6、1.335×10−6、1.257×10−6 A/cm2，数值降低了一个数量级，说明材料的耐腐蚀性能得到了提高。结论 深冷处理可以有效改善X52管线钢的力学性能、耐磨性能和耐腐蚀性能，在管道运输领域具有潜在的应用前景。 |
| 英文摘要: |
| In order to improve the wear and corrosion resistance of X52 pipeline steel matrix and analyze the mechanism of the impact of cryogenic treatment on the property of X52 pipeline steel, the work aims to adopt the liquid method for cryogenic treatment of X52 pipeline steel for different time at the processing temperature of −196 ℃. The microstructure, phase composition, and tensile properties of X52 pipeline steel after deep cryogenic treatment were analyzed by ultra-deep field optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and universal tensile machine. The microhardness and friction coefficient of X52 pipeline steel specimens were tested by a microhardness tester and a friction and wear tester. Then, the morphology and element distribution of the wear marks were analyzed by SEM and EDS. The Tafel curve of X52 pipeline steel after cryogenic treatment was tested in a simulated soil solution by electrochemical workstation, and the corrosion resistance of the specimens was evaluated. After different time of deep cryogenic treatment, the microhardness, tensile strength, and elastic modulus of the specimens were improved due to the precipitation of dispersed carbides and grain refinement, but the change in yield strength was not significant. When the duration of cryogenic treatment was 30 hours, its microhardness reached the maximum value of 210.8HV0.2, which was 10.77% higher than 190.3HV0.2 in non-cryogenic state. When the duration of cryogenic treatment was 7 hours, its tensile strength reached its maximum value of 600.7 MPa, which was 4.05% higher than 574.7 MPa in the non-cryogenic state. Under the enormous cold shrinkage stress, the grain size of the specimens was refined, and the distribution of dispersed carbides was more uniform, which led to a decrease in the average friction coefficient of the specimens after cryogenic treatment. The change in the average friction coefficient showed a trend of firstly decreasing and then increasing. After 7 hours of cryogenic treatment, the average friction coefficient of the specimens decreased from the initial value of 0.665 to the lowest value of 0.425. The wear resistance of the specimens was improved, and the wear mechanism was a combination of oxidation wear and abrasive wear, with abrasive wear playing a major role. The polarization curve results showed that the self-corrosion potential of the specimens after cryogenic treatment shifted positively. When the duration of cryogenic treatment was 11, 30, and 55 h, the self-corrosion potential of the specimens in a simulated soil solution shifted positively from −0.895 V in the non-cryogenic state to −0.796, −0.859 and −0.864 V, respectively, and the corrosion current density decreased from 15.47×10−6 A/cm2 in the non-cryogenic state to 1.781×10−6, 1.335×10−6 and 1.257×10−6 A/cm2 respectively, with a decrease of one order of magnitude. This indicated that the corrosion resistance of the X52 pipeline steel was improved. In summary, cryogenic treatment can effectively improve the mechanical properties, wear resistance, and corrosion resistance of X52 pipeline steel, and has potential application prospects in the field of pipeline transportation. |
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