化工学报 ›› 2022, Vol. 73 ›› Issue (3): 1324-1334.DOI: 10.11949/0438-1157.20211559
收稿日期:
2021-11-01
修回日期:
2021-12-20
出版日期:
2022-03-15
发布日期:
2022-03-14
通讯作者:
俞树荣
作者简介:
宋伟(1979—),男,博士,副教授,基金资助:
Wei SONG(),Wanjia LI,Shurong YU(),Rongrong MA
Received:
2021-11-01
Revised:
2021-12-20
Online:
2022-03-15
Published:
2022-03-14
Contact:
Shurong YU
摘要:
为了研究TC4合金在300℃和500℃下的微动磨损行为,利用扫描电子显微镜和激光共聚焦显微镜分别表征表面磨痕形貌、磨损体积和磨痕轮廓,探究两种温度中TC4合金不同接触载荷作用下的微动磨损机制。结果表明: 磨损体积与接触载荷呈现正相关的关系,而摩擦系数和磨损率则呈现负相关的关系。两种温度下的无润滑微动摩擦磨损过程中,小载荷作用时磨损形式表现为氧化磨损和磨粒磨损;大载荷作用时磨损形式为氧化磨损和黏着磨损。与300℃相比,500℃时合金接触表面塑性变形严重,摩擦系数小,氧化磨损加剧,疲劳裂纹扩展严重。TC4合金高温环境中微动磨损机制为黏着磨损、磨粒磨损、氧化磨损和疲劳磨损,其中氧化磨损在TC4合金高温微动磨损中占据主导地位。
中图分类号:
宋伟, 李万佳, 俞树荣, 马荣荣. 热力耦合下TC4合金微动磨损行为影响的研究[J]. 化工学报, 2022, 73(3): 1324-1334.
Wei SONG, Wanjia LI, Shurong YU, Rongrong MA. Effect of thermal mechanical coupling on fretting wear behavior of TC4 alloy[J]. CIESC Journal, 2022, 73(3): 1324-1334.
样品 | 化学成分/%(质量) | |||||
---|---|---|---|---|---|---|
TC4 | Al | V | O | Fe | N | Ti |
6.5 | 4.3 | 0.08 | 0.06 | 0.01 | Bal. | |
GCr15 | Cr | C | Mn | Si | Mo | Fe |
1.6 | 1.0 | 0.3 | 0.3 | 0.08 | Bal. |
表1 TC4合金、GCr15轴承钢的主要化学成分
Table 1 Chemical composition of TC4 and GCr15
样品 | 化学成分/%(质量) | |||||
---|---|---|---|---|---|---|
TC4 | Al | V | O | Fe | N | Ti |
6.5 | 4.3 | 0.08 | 0.06 | 0.01 | Bal. | |
GCr15 | Cr | C | Mn | Si | Mo | Fe |
1.6 | 1.0 | 0.3 | 0.3 | 0.08 | Bal. |
Materials | Rp/MPa | Rm/MPa | HRC | E/GPa |
---|---|---|---|---|
TC4 | ≥825 | ≥895 | 30 | 110 |
GCr15 | 1700 | 2000 | 68 | 210 |
表2 TC4合金、GCr15轴承钢主要力学性能
Table 2 Main mechanical properties of TC4 and GCr15
Materials | Rp/MPa | Rm/MPa | HRC | E/GPa |
---|---|---|---|---|
TC4 | ≥825 | ≥895 | 30 | 110 |
GCr15 | 1700 | 2000 | 68 | 210 |
图3 TC4合金在300℃和500℃下摩擦系数随时间的变化和平均摩擦系数随着载荷的变化
Fig.3 Changes of coefficient friction with time and changes of average friction coefficient with load of TC4 alloy at 300℃ and 500℃
图8 300℃和500℃下TC4合金在不同条件下的表面微观形貌
Fig.8 The microscopic appearance of the TC4 alloy surface under different conditions at 300 and 500℃(a)~(c): Fn =50 N, 300℃; (d)~(f): Fn=50 N, 500℃; (g)~(i): Fn =100 N, 500℃
图11 TC4合金表面EDS分析及不同温度下磨坑X射线衍射结果
Fig.11 EDS analysis of surface of TC4 alloy and X-ray diffraction results of the grinding pit under different conditions
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