Ti811表面激光熔覆复合涂层的微观组织及摩擦磨损性能 
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Microstructure and Friction and Wear Resistance of Laser Cladding Composite Coating on Ti811 Surface
1 天津工业大学机械工程学院, 天津 300387
2 天津市现代机电装备技术重点实验室, 天津 300387
3 中国民航大学工程技术训练中心, 天津 300300
图 & 表
图 1. 粉末的SEM形貌。(a) TC4粉;(b) Ni60粉
Fig. 1. SEM morphology of the powders. (a) TC4 powders; (b) Ni60 powders
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图 2. 熔覆粉和涂层的XRD图谱。(a) TC4粉;(b) Ni60粉;(c)涂层
Fig. 2. XRD patterns of cladding powders and coating. (a) TC4 powders; (b) Ni60 powders; (c) coating
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图 3. 涂层的横截面形貌。(a)宏观形貌;(b)示意图
Fig. 3. (a) Cross-section morphology of the coating; (b) schematic of the coating
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图 4. 涂层横截面的微观组织。(a)~(b)涂层上部;(c)涂层底部;(d)结合区;(e)涂层上部;(f)图(e)的放大图;(g) A区域的放大图;(h) B区域的放大图;(i)图(g)的放大图
Fig. 4. Microstructures of cross-section of the coating. (a)-(b) Top region of the coating; (c) bottom region of the coating; (d) bonding zone; (e) top region of the coating; (f) magnified image of Fig.4 (e); (g) magnified image of A region in Fig.4 (f); (h) magnified image of B region in Fig.4(f); (i) magnified image of Fig.4(g)
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图 5. 涂层中各相的EDS分析。(a)枝晶TiC;(b)粒状TiC;(c) Ti2Ni;(d) α-Ti;(e) TiB2
Fig. 5. EDS analysis of phases in the coating. (a) Dendritic TiC; (b) granular TiC; (c) Ti2Ni; (d) α-Ti; (e) TiB2
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图 6. 晶体结构。(a) TiB2;(b) TiC
Fig. 6. Crystal structures. (a) TiB2; (b) TiC
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图 7. (0001)TiB2与(111)TiC的晶体学关系
Fig. 7. Crystal relationship between (0001)TiB2 and (111)TiC
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图 8. 涂层的显微硬度分布
Fig. 8. Microhardness distribution of the coating
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图 9. (a) Ti811钛合金的磨损体积;(b)涂层的磨损体积;(c)摩擦因数曲线;(d)典型磨损轨迹截面轮廓
Fig. 9. (a) Wear volume of Ti811 titanium alloy; (b) wear volume of the coating; (c) friction coefficient curves; (d) section profiles of a typical wear track
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图 10. Ti811钛合金及涂层的磨损形貌
Fig. 10. Wear appearances of Ti811 titanium alloy and the coating
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表 1Ti811近α型钛合金的化学成分
Table1. Chemical composition of Ti811 near α titanium alloy
| Element | Al | Mo | V | C | N | Fe | O | Ti |
|---|
| Mass fraction /% | 8.10 | 1.05 | 0.99 | 0.03 | 0.01 | 0.05 | 0.06 | Bal. |
|
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表 2TiB2和TiC的晶格参数
Table2. Lattice constants of TiB2 and TiC
| Crystal | Crystal system | Space group | Lattice constant /nm |
|---|
| a | b | c |
|---|
| TiB2 | Hexagonal | P6-MMM | 0.3028 | 0.3028 | 0.3228 | | TiC | Cubic | FM-3M | 0.4328 | 0.4328 | 0.4328 |
|
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表 3计算TiB2与TiC之间晶格错配度的参数及结果
Table3. Parameters in calculating lattice misfit between TiB2 and TiC, and calculated misfit
| Parameter | TiB2(0001)∥TiC(111) |
|---|
| [uvw]TiB2 | [110] | [100] | [20] | | [uvw]TiC | [01] | [11] | [10] | | θ /(°) | 0 | 0 | 0 | | dTiB2 /(10-10 m) | 3.028 | 5.245 | 3.028 | | dTiC /(10-10 m) | 3.060 | 5.301 | 3.060 | | δ /% | 1.057 |
|
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表 4Ti811钛合金和涂层的摩擦磨损性能
Table4. Friction and wear properties of Ti811 titanium alloy and the coating
| Material | Wear volume /(10-3 mm3) | Weardepth /μm | Wear volume rate /(10-3 mm3·s-1) |
|---|
| Ti811 | 238.3 | 94.35 | 1.19 | | Coating | 175 | 80.13 | 0.88 |
|
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刘亚楠, 孙荣禄, 牛伟, 张天刚, 谭金花. Ti811表面激光熔覆复合涂层的微观组织及摩擦磨损性能[J]. 中国激光, 2019, 46(1): 0102010. Liu Yanan, Sun Ronglu, Niu Wei, Zhang Tiangang, Tan Jinhua. Microstructure and Friction and Wear Resistance of Laser Cladding Composite Coating on Ti811 Surface[J]. Chinese Journal of Lasers, 2019, 46(1): 0102010.
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