摘要
为了消除高碳轧辊激光熔覆过程中引发的裂纹，设计了一种微米级的合金化陶瓷粉末，采用CO2激光器对冶金轧辊表面实施合金化处理．利用金相显微镜、显微硬度计对合金化层的硅微组织和硬度进行了研究。结果表明，在激光输出功率P=2．2KW，扫描速度V=5mm／s，光斑尺寸D=3mm的条件下进行激光合金化，涂层与基体为冶金结合，涂层的显微组织细化，合金化层平均硬度为基材区2.
To eliminate cracks of roller with high carbon cladded by laser, a kind of alloying ceramic powder was designed, and the roller was alloyed by CO2 laser. Microstructure was investigated by optical microscope （OM） , the cladding layer and the substrate was measured using micro-hardness tester. The experimental results indicate that the excellent metallurgical bonding is obtained between alloying layer and snbstrate. Microstructure of alloying layer is refined and the average value of micro-hardness of alloying layer is approximately 2.5 times larger than that of substrate. The optimized technological parameter is that laser output power is 2.2 kW , the scannin/speed is 5mm / s . beam diameter is 3.0 mm.
出处
《模具工程》
2011年第7期49-52,共4页
Mould &Die Project
关键词
冶金轧辊
激光合金化
工艺参数
metallurgicalroller, laser alloy, technical parameter,
