摘要
选用Ni基自熔合金粉末和Co基自熔合金粉末,在低碳钢基材上分别进行预置粉末和同轴送粉激光熔覆试验。激光功率2.0kW,光斑直径2.0mm,扫描速率0.15～0.25m/min。对熔覆层显微组织分析表明,同轴送粉熔覆层明显比预置熔覆层组织细密(前者为2.5～4.0μm,后者为5.0～10.0μm),并且具有较好的耐热冲击性。显然这是很有实际意义的,因为同轴送粉比预置粉末更易于实现自动化和大面积激光熔覆。
Ni-based spontaneous melting alloy powder and Co - based spontaneous melting alloy powder are selected for laser cladding on the mild steel substrate with the fore-put powder and the coaxial powder feeding respectively. Laser power is 2. 0 kW, laser beam spot diameter 2. 0 mm,scanning speed 0. 15-0. 25 m/min. The results show that the microstructure of the coaxial powder feeding laser cladding layer is finer than that of the fore-put powder laser cladding layer (the former 2. 5-4. 0 μm, the latter 5. 0-10. 0 μm) .and thermal shock resistance of the former is better than that of the latter. Obviously, this is very significant because the coaxial powder feeding laser cladding is easy to realize automation and big area cladding.
出处
《应用激光》
CSCD
北大核心
2002年第3期290-292,共3页
Applied Laser
