Research on Multilayer and Multipass Laser Cladding Process for U75V Rails

Table 1. Chemical composition of U75V rail
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Table 1. Chemical composition of U75V rail
Element C Si Mn P S V
Mass fraction /% 0.71‒0.80 0.50‒0.80 0.70‒1.05 <0.03 <0.03 0.04‒0.12

Table 2. Chemical composition of 15-5ph Fe-based alloy powder
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Table 2. Chemical composition of 15-5ph Fe-based alloy powder
Element C Si Mn Cr Ni B Cu Fe
Mass fraction /% ≤0.07 ≤1.0 ≤1.0 14‒15 3.5‒5.5 0.7‒0.9 2.5‒4.5 Bal.

Table 3. Appearances of samples prepared at different preheating temperatures
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Table 3. Appearances of samples prepared at different preheating temperatures
Specimen
label
Factor Appearance
Power /W Cladding speed /(mm·s^-1） Feeding speed /(g·min^-1） Preheating temperature /℃
A1 900 600 7.58 100
A2 900 600 7.58 200
A3 900 600 7.58 300

Table 4. Appearances of samples prepared at different Z-axis lifting values
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Table 4. Appearances of samples prepared at different Z-axis lifting values
Specimen label Power /W Cladding speed /(mm·s^-1） Feeding speed /（g·min^-1） Overlapping ratio /% Z-axis lifting amount /mm Appearance
B1 900 600 7.58 58.8 0.4
B2 900 600 7.58 58.8 0.6
B3 900 600 7.58 58.8 0.8

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Tong Tong, Jialei Zhu, Xu Liang. Research on Multilayer and Multipass Laser Cladding Process for U75V Rails[J]. Laser & Optoelectronics Progress, 2021, 58(7): 0714005

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