激光功率对42CrMo熔覆Stellite-6涂层耐腐蚀性能的影响 
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Effect of Laser Power on Corrosion Resistance of 42CrMo Cladding Stellite-6 Coating
江苏省食品先进制造装备技术重点实验室, 江苏 无锡 214122
图 & 表
图 1. 基材和不同激光功率下制备的Stellite-6涂层在NaCl溶液中的腐蚀速率
Fig. 1. Corrosion rate of substrate and Stellite-6 coating prepared at different laser powers in NaCl solution
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图 2. 基材和不同激光功率下制备的Stellite-6涂层试样在NaCl溶液中的动极化曲线
Fig. 2. Dynamic polarization in NaCl solution of base steel and Stellite-6 coating samples prepared at different laser powers
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图 3. 基材和不同激光功率下制备的Stellite-6涂层试样在NaCl溶液中的极化阻抗曲线
Fig. 3. Polarization resistance curves of base steel and Stellite-6 coating prepared at different laser powers in NaCl solution
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图 4. 基材和不同激光功率下制备的Stellite-6涂层在NaCl溶液中浸泡24 h后的腐蚀形貌。(a)基材;(b) 1500 W;(c) 2000 W;(d) 2500 W;(e) 3000 W
Fig. 4. Corrosion morphologies of base steel and Stellite-6 coating prepared at different powers after soaking in NaCl solution for 24 h. (a) Base steel; (b) 1500 W; (c)2000 W; (d) 2500 W; (e) 3000 W
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图 5. 不同激光功率下制备的熔覆层熔池区域的金相组织。(a) 1500 W;(b) 2000 W;(c) 2500 W;(d) 3000 W
Fig. 5. Metallographic structures of the molten pool in cladding layer prepared at different laser powers. (a) 1500 W; (b) 2000 W; (c) 2500 W; (d) 3000 W
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表 1基材42CrMo的化学成分
Table1. Chemical composition of 42CrMo substrate
| Element | C | Si | Mn | Cr | Mo | P | S |
|---|
| Mass fraction /% | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | 0.9-1.2 | 0.15-0.25 | ≤0.035 | ≤0.035 |
|
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表 2Stellite-6粉末的化学成分
Table2. Chemical composition of Stellite-6 powder
| Element | C | Cr | Si | W | Fe | Mo | Ni | Mn | Co |
|---|
| Mass fraction /% | 1.15 | 29.00 | 1.10 | 4.50 | 3.00 | 1.00 | 3.00 | 1.0 | Bal. |
|
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表 3基材和不同激光功率下制备的Stellite-6涂层试样在NaCl溶液中的电化学参数
Table3. Electrochemical parameters of base steel and Stellite-6 coating samples prepared at different powers in NaCl solution
| Sample | Electrochemical parameter | PE /% |
|---|
| Ecorr /V | Icorr /(10-3 A·cm-2) | Rp /(Ω·cm2) |
|---|
| Base steel | -0.394 | 36.990 | 666.8 | | | Sample 2 (1500 W) | -0.298 | 12.750 | 2275.7 | 65.54 | | Sample 3 (2000 W) | -0.288 | 9.663 | 2863.6 | 73.88 | | Sample 4 (2500 W) | -0.150 | 3.294 | 6742.5 | 91.09 | | Sample 5 (3000 W) | -0.232 | 6.849 | 4071.9 | 81.42 | | Note: Ecorr represents corrosion voltage; Icorr represents corrosion current. |
|
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崔宸, 武美萍, 程伟. 激光功率对42CrMo熔覆Stellite-6涂层耐腐蚀性能的影响[J]. 激光与光电子学进展, 2019, 56(24): 241403. Chen Cui, Meiping Wu, Wei Cheng. Effect of Laser Power on Corrosion Resistance of 42CrMo Cladding Stellite-6 Coating[J]. Laser & Optoelectronics Progress, 2019, 56(24): 241403.
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