Effect of Displacement on Tangential Fretting Wear Characteristics of 690 Alloy Tube/ 405 Stainless Steel Plate
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摘要: 采用自制的微动磨损试验机，开展了690合金管/405不锈钢的切向微动磨损试验，研究了位移幅值(15、30、80和200 μm)对其微动磨损特性的影响. 试验结果表明：当位移幅值改变时，微动运行状态会发生改变. 当位移幅值为15 μm时，微动状态为部分滑移区，此时摩擦系数最小，磨损率最低，微动损伤最轻微；当位移幅值为30 μm时，微动运行于混合区，摩擦系数明显高于部分滑移区；而当位移幅值为80和200 μm时，微动运行于完全滑移区，稳定阶段的摩擦系数与混合区的接近. 总体而言，随着位移幅值的增大，磨痕宽度增大，磨损加剧，磨损体积增加. 部分滑移区的磨损机制主要为黏着磨损和剥层，混合区主要的磨损机制为剥层，而完全滑移区的磨损机制主要为剥层磨损和磨粒磨损.Abstract: The tangential fretting wear tests of 690 alloy tube/405 stainless steel were carried by a self-designed fretting wear test rig. The effect of displacement (15 μm, 30 μm, 80 μm, 200 μm) on fretting wear characteristics has been investigated. With the increase of amplitude, fretting wear tests were running in partial slip regime (15 μm), mixed slip regime (30 μm) and gross slip regime (80 μm and 200 μm), respectively. The friction coefficient of partial slip regime was lower associated with slight damage, while the friction coefficient of mixed slip regime and gross slip regime were relatively higher. Additionally, the steady values of mixed slip regime and gross slip regime were almost same. Generally, with the increasing displacement, the width of wear scar and wear volume increased. The main wear mechanisms of partial slip regime were adhesion wear and delamination, while the main wear mechanisms of mixed slip regime was delamination. And the main wear mechanisms of gross slip regime were delamination and abrasive wear.
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Keywords:
- 690 alloy tube /
- fretting wear /
- displacement /
- friction coefficient /
- wear mechanism
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图 4 不同位移幅值下690合金磨痕表面扫描电镜照片
Figure 4. SEM micrographs of worn 690 alloy tube under different displacement
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图 5 不同位移幅值下690合金的损伤表面形貌扫描电镜测试结果
Figure 5. SEM micrographs of worn 690 alloy under different displacement
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图 6 不同位移幅值下690合金磨损表面EDX结果
Figure 6. EDX results of worn 690 alloy under different displacement
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图 7 不同位移幅值下690合金的剖面结果
Figure 7. Cross-section results of 690 alloy under different displacement
表 1 试验材料主要化学成分
Table 1 Main chemical compositions of the test material
Material Mass fraction/% Ni Cr Fe Al C Si Mn S P Inconel 690 ≥58 28.5~31 9~11 ≤0.4 0.015~0.025 ≤0.5 ≤0.5 ≤0.003 ≤0.015 405 SS ≤0.6 11.5~14.5 Bal. 0.1~0.3 ≤0.08 ≤1 ≤1 ≤0.03 ≤0.040 
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