Abstract To increase the slurry erosion resistance, cyclic heat treatments were performed on 13wt.%Cr-4wt.%Ni steel at 1050 °C for 3, 5, 7, and 9 cycles. Microstructures in as-received and cyclic heat treated (CHTed) conditions were analyzed with the help of optical, SEM, XRD, and TEM. The structure-property correlations were then studied after determining the hardness, microhardness of each phase, and tensile properties. It was observed that the dissolution of M23C6 carbides caused the lath widening which deteriorated the microhardness of the martensite in the CHTed specimens. The increased hardness and tensile strengths were attributed to the reduced delta ferrite and the refined blocks in the CHTed specimens. Slurry erosion behavior of as-received and CHTed specimens was tested by conducting a 24hrs erosion test on slurry pot tester. The CHTed specimen possessed 69.9% higher slurry erosion resistance due to higher hardness and yield strength. During the first 12hrs of erosion, the subsurface hardening due to work hardening reduced the erosion rates significantly while the progressive loss of erosivity of the sand particles reduced the erosion rates in later hours of erosion test. AFM visualized the plastic deformation as a predominant erosion mechanism for all the specimens.

中文翻译：

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循环热处理后马氏体 13wt%Cr–4wt.%Ni 钢的抗泥浆侵蚀性能提高

摘要 为提高浆液冲刷性能，对13wt.%Cr-4wt.%Ni钢在1050℃下进行3、5、7、9个循环的循环热处理。借助光学、SEM、XRD 和 TEM，分析了原样和循环热处理 (CHTed) 条件下的微观结构。然后在确定硬度、各相的显微硬度和拉伸性能后研究结构-性能相关性。观察到 M23C6 碳化物的溶解导致板条加宽，从而降低了 CHT 试样中马氏体的显微硬度。硬度和抗拉强度的增加归因于减少的 delta 铁素体和 CHTed 试样中的细化块。通过在浆罐测试仪上进行 24 小时侵蚀测试来测试原样和 CHT 样品的浆液侵蚀行为。由于更高的硬度和屈服强度，CHTed 试样具有高 69.9% 的泥浆侵蚀抗力。在侵蚀的前 12 小时内，由于加工硬化导致的地下硬化显着降低了侵蚀率，而砂粒侵蚀性的逐渐丧失降低了侵蚀试验后期的侵蚀率。AFM 将塑性变形可视化为所有试样的主要侵蚀机制。