Microstructure and properties of laser cladding FeCrBSi composite powder coatings with higher Cr content
Microstructure and properties of laser cladding FeCrBSi composite powder coatings with higher Cr content
复制标题
高Cr含量激光熔覆FeCrBSi复合粉末涂层的组织与性能
DOI：
10.1016/j.jmatprotec.2013.12.009
复制
发表时间：
2014-04
影响因子：
6.3
通讯作者：
F Liu...
中科院分区：
文献类型：
--
作者：
S Zhao;W Gao;C Zhou;F Liu...
采用3kw的固体激光器，采用高Cr含量的FeCrBSi合金粉末进行激光熔覆。在Cr含量较高的FeCrBSi合金粉末中加入抗裂性能更好的Ni基和fe基合金粉末，增加了韧性相，降低了热膨胀系数，降低了熔覆层的裂纹敏感性。在基体上包覆高Cr含量的FeCrBSi合金粉末，结合Ni基和fe基合金粉末，形成两种不同的相。熔覆层的硬相主要由碳化物相M23C6组成，在熔覆层中起润滑作用的韧性相主要由奥氏体γ-Fe和γ-Ni组成。在Cr含量较高的FeCrBSi合金粉末中加入Ni基和fe基合金粉末后，韧性相增加，硬质相相对较少。熔覆层表面光滑，相邻轨迹之间无宏观孔隙、裂纹和空隙。因此，熔覆层的韧性得到提高，裂纹倾向降低。得到了三种不同的复合粉末。分析了熔覆层的组成和形貌，比较了硬质相和韧性相的显微硬度。三种熔覆层的平均显微硬度在HV0.2760 ~ HV0.2950之间。
FeCrBSi alloy powder with higher Cr content was used for laser cladding by employing a 3 kW solid-state laser. Ni- and Fe-based alloy powders, which were more resistant to cracking, were added into FeCrBSi alloy powder with higher Cr content to increase the ductile phases, lower thermal expansion coefficient, and reduce the crack sensitivity of the cladding layer. FeCrBSi alloy powder with higher Cr content combined Ni- and Fe-based alloy powder were cladded on the substrates, which yield two different phases. The hard phases of the cladding layer were mainly composed of carbide phase M23C6, and the ductile phases which played a lubrication function in the cladding layer were mainly composed of austenite γ-Fe and γ-Ni. The ductile phases increased by adding Ni- and Fe-based alloy powder into FeCrBSi alloy powder with higher Cr content, and the hard phases became sparser relatively. Smooth cladding layers, which were free of macroscopic pores, cracks and void between the adjacent tracks, were achieved. Therefore, the toughness of the cladding layer was improved, and the crack tendency was reduced. Three kinds of composite powder were obtained. The composition and morphology of the cladding layer were analyzed, and the microhardness between the hard phases and the ductile phases was compared. The average microhardnesses of the three cladding layers varied from HV0.2760 to HV0.2950.
登录
查看更多内容
影响因子：
6.3
作者：
M. Qian;L. Lim;Z. D. Chen;W. Chen
通讯作者：
M. Qian;L. Lim;Z. D. Chen;W. Chen
影响因子：
5.4
作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;Huang Wei;C. Kun
通讯作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;Huang Wei;C. Kun
影响因子：
5.4
作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;C. Kun
通讯作者：
Song Wulin;J. Echigoya;Zhu Beidi;C. Xie;C. Kun
影响因子：
5.4
作者：
Q. Hou
通讯作者：
Q. Hou
影响因子：
3.1
作者：
Jinran Lin;Zehua Wang;P. Lin;Jiangbo Cheng;Jingjing Zhang;Xin Zhang
通讯作者：
Jinran Lin;Zehua Wang;P. Lin;Jiangbo Cheng;Jingjing Zhang;Xin Zhang