Slurry erosion resistance of laser clad Fe-Cr-B-Si coatings

被引:9
|
作者
Jiang, WH [1 ]
Kovacevic, R [1 ]
机构
[1] So Methodist Univ, Sch Engn, Res Ctr Adv Mfg, Richardson, TX 75081 USA
关键词
laser cladding; coating; slurry erosion; wear; surface modification; boride; tungsten carbide; chromium carbide; liquid nitrogen cooling; microstructure; hardness; steel; impact; composite coating; structural refinement;
D O I
10.1179/174329404X7135
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The slurry erosion behaviour of laser clad Fe-Cr-B-Si alloy coatings was investigated at impact angles from 30degrees to 90degrees with an increment of 15degrees, and compared with the slurry erosion behaviour of two laser clad carbide coatings and a non-coated substrate made of AISI 4140 steel. The Fe-Cr-B-Si alloy coatings had slurry erosion resistance. Their overall slurry erosion resistance at impact angles from 30degrees to 90degrees was higher than both the carbide coatings and steel. The erosion resistance of the Fe-Cr-B-Si alloy coatings was less dependent on slurry impact angle. The Fe-Cr-B-Si alloy coatings consisted of the Fe-Cr solid solution matrix and the second phase Fe2B. The laser beam traverse rate had little affect on the erosion resistance and microstructures of the coatings. The liquid nitrogen cooling of the substrate resulted in a sturctural refinement of the deposited coating and increased the erosion resistance substantially.
引用
收藏
页码:464 / 468
页数:5
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