The National Key Laboratory for Laser Technology,Huazhong University of Science and Technology,Wuhan, 430074;
Three Gorges University, Yichang, 443002;
The National Key Laboratory for Laser Technology,Huazhong University of Science and Technology,Wuhan, 430074;
abrasive wear, CO2 shielded flux-cored wire, surfacing, caterpillar construction machines;