激光熔覆NiCrBSiC合金组织及性能研究
Structure and Properties of NiCrBSiC Alloy
采用CO2激光器及LASERCELL-1005六轴六联动三维激光加工机床利用粉末预置法在40Cr基体上进行激光熔覆处理。用扫描电镜、X射线衍射仪、EG&G M273电化学测试系统及显微硬度计等对熔覆层进行微观组织观察和性能测试。结果表明：熔覆层主要由FeNi3、Ni3B、C23C6等相组成。激光熔覆后耐蚀性能有大幅度改善；硬度明显提高，其最大值为约基体硬度的4倍。扫描速度增大，熔覆层厚度、硬化区深度变小；显微组织变得细小均匀、晶间排列紧密。熔覆试样的耐腐蚀性能增强，硬度增高。
Laser cladding was carry out by CO2 laser and the LASERCELL-1005 six axes sixlinkages three dimensional laser processing machine tools on 40Cr steel. The macroscopic and properties were analysised by scanning electron microscope, X-ray diffractometer, EG&G M273 electrochemical measurement system and microhardness meter. The result indicated that, the cladding layer is mainly constitute by FeNi3、Ni3B、C23C6. After the corrosion resistance and the hardness enhanced greatly, the maximum of hardness is as about four times as that of the substrate. With the increase of the scanning speed, the thickness of cladding coatings and the harden zone were becomes smaller; the microstructure changes tiny, uniform and compact. The hardness and corrosion resistance becomes better.
邱星武、李刚、邱玲
材料科学金属学、热处理焊接、金属切割、金属粘接
激光熔覆NiCrBSiC合金显微组织耐蚀性能硬度
laser claddingNiCrBSiC alloymicrostructurecorrosion resistancehardness
邱星武,李刚,邱玲.激光熔覆NiCrBSiC合金组织及性能研究[EB/OL].(2007-11-19)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/200711-359.点此复制
评论