单道次激光熔覆304不锈钢数值模拟与实验研究 下载: 1187次
Numerical Simulation and Experimental Study of Single-Track Laser Cladding of 304 Stainless Steels
西安科技大学机械工程学院, 陕西 西安 710054
图 & 表
图 1. 激光熔覆过程示意图
Fig. 1. Schematic of laser cladding process
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图 2. 激光熔覆。(a)单道熔覆;(b)单道宏观形貌
Fig. 2. Laser cladding. (a) Schematic of single-track cladding; (b) single-track macro-morphologies
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图 3. 激光扫描速度为13 mm/s时不同激光功率下的温度场分布(上)和截面宏观图(下)。 (a)(e) 2100 W;(b)(f) 2300 W;(c)(g) 2500 W;(d)(h) 2700 W
Fig. 3. Temperature field distributions (up) and macroscopic cross-sectional diagrams (down) under different laser powers when laser scanning speed is 13 mm/s. (a)(e) 2100 W; (b)(f) 2300 W; (c)(g) 2500 W; (d)(h) 2700 W
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图 4. 激光功率为2500 W时不同激光扫描速度下的温度场分布(上)和截面宏观图(下)。 (a)(e) 7 mm/s;(b)(f) 10 mm/s;(c)(g) 13 mm/s;(d)(h) 16 mm/s
Fig. 4. Temperature field distributions (up) and macroscopic cross-sectional diagrams (down) under different laser scanning speeds when laser power is 2500 W. (a)(e) 7 mm/s; (b)(f) 10 mm/s; (c)(g) 13 mm/s; (d)(h) 16 mm/s
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图 5. 激光扫描速度为13 mm/s时不同激光功率下熔覆层中部的显微组织。(a) 2100 W;(b) 2300 W;(c) 2500 W;(d) 2700 W
Fig. 5. Microstructures in middle of cladding layers under different laser powers when laser scanning speed is 13 mm/s. (a) 2100 W; (b) 2300 W; (c) 2500 W; (d) 2700 W
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图 6. 激光功率为2500 W时不同激光扫描速度下熔覆层中部的显微组织。 (a) 7 mm/s;(b) 10 mm/s;(c) 13 mm/s;(d) 16 mm/s
Fig. 6. Microstructures in middle of cladding layers under different laser scanning speeds when laser power is 2500 W. (a) 7 mm/s; (b) 10 mm/s; (c) 13 mm/s; (d) 16 mm/s
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表 127SiMn钢的化学成分(质量分数,%)
Table1. Chemical compositions of 27SiMn steel (mass fraction, %)
C | Si | Mn | P | S | Cu | Cr | Ni | Mo |
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0.24-0.32 | 1.10-1.40 | 1.10-1.40 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.15 |
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表 2304不锈钢粉末的化学成分(质量分数,%)
Table2. Chemical compositions of 304 stainless steel powder (mass fraction, %)
C | Si | Mn | Ni | Cr | O | S | Fe |
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0.15 | 0.8 | 0.2 | 8-12 | 17.5-18.5 | <0.20 | ≤0.03 | Bal. |
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表 3激光扫描速度为13 mm/s时不同激光功率下虚拟圆尺寸
Table3. Virtual circle sizes under different laser powers when laser scanning speed is 13 mm/s
Laserpower /W | SimulatedradiusR' /mm | ExperimentalradiusR /mm | Experimentalradiusr /mm | HAZΔR /mm |
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2100 | 1.867 | 1.767 | 1.245 | 0.522 | 2300 | 2.046 | 1.821 | 1.286 | 0.535 | 2500 | 2.281 | 2.047 | 1.409 | 0.638 | 2700 | 2.685 | 2.478 | 1.741 | 0.737 |
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表 4激光功率为2500 W时不同激光扫描速度下虚拟圆尺寸
Table4. Virtual circle sizes under different laser scanning speeds when laser power is 2500 W
Laserscanningspeed /(mm·s-1) | SimulatedradiusR' /mm | ExperimentalradiusR /mm | Experimentalradiusr /mm | HAZΔR /mm |
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7 | 3.512 | 3.013 | 1.926 | 1.087 | 10 | 2.863 | 2.587 | 1.680 | 0.907 | 13 | 2.281 | 2.047 | 1.409 | 0.638 | 16 | 1.695 | 1.749 | 1.220 | 0.529 |
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郭卫, 张亚普, 柴蓉霞. 单道次激光熔覆304不锈钢数值模拟与实验研究[J]. 激光与光电子学进展, 2019, 56(9): 091401. Wei Guo, Yapu Zhang, Rongxia Chai. Numerical Simulation and Experimental Study of Single-Track Laser Cladding of 304 Stainless Steels[J]. Laser & Optoelectronics Progress, 2019, 56(9): 091401.