摘要
研究韧性较高的热作模具H13钢表面上通过激光合金堆焊的方法直接复合类高速钢金属。采用专用合金焊丝,利用自动送丝系统通过激光堆焊的方法在基体材料上获得2～3mm的高硬、高耐磨的合金堆焊层,利用金相显微镜、扫描电镜、X射线衍射仪和显微硬度仪对堆焊层进行显微组织分析和硬度测试。结果表明:堆焊层形成了高硬的碳化物,且堆焊层与基体之间具有良好的冶金结合,堆焊层的平均硬度达922HV。
HSS-like metal was directly obtained on hot die steel H13 by laser overlaying. A 2-3 mm thick HSS-like surfacing layer with high hardness and high wear-resistance was obtained on H13 steel by laser overlaying on a automatic wire-feeding system using special wire. The structure of the surfacing layer was analyzed using optical microscope, SEM and XRD, and its hardness was measured. The results show that carbides with high microhardness form in overlaying layer, and there is metallurgical bonding between the overlaying layer and the matrix. The average hardness of overlaying layer is 922 HV. The study indicates that it is feasible to directly laser overlaying HSS-like alloy on hot die steel.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2005年第4期95-97,共3页
Transactions of Materials and Heat Treatment
基金
浙江省自然科学基金资助项目(500095)
关键词
热作模具钢
激光堆焊
类高速钢
专用合金焊丝
显微硬度
Brittle fracture
Dies
Hard facing
Laser applications
Microhardness
Microstructure
Optical microscopy
Scanning electron microscopy
Steel
Wear resistance
X ray diffraction analysis
