Method for online laser broadband quenching on surface of steel rail
A rail and laser technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve problems such as hardened layer cracking, low equipment efficiency, and inappropriateness, and achieve the effects of prolonging service life, reducing cracks, and good toughness
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[0019] Such as figure 1 , figure 2 , image 3 with Figure 4 As shown, a method for on-line laser broadband quenching of rail surface, the specific solution is as follows:
[0020] Fix the induction spray gun and the laser emitting head of the fiber laser on the mechanical arm. First, use the induction spray gun to spray a layer of light-absorbing paint on the surface of the rail. The light-absorbing paint is graphite particles + 5%-20% SiO 2 Particles, the particle size is between 50nm-1um, and then the fiber laser is used to quickly scan the wheel-rail contact surface of the rail. The laser power of the fiber laser is 2.5-4.0KW. The laser quenching spot adopts a rectangular spot with a size of 10mm×2mm or 20mm. ×2mm, the scanning speed is 1mm / s-20mm / s, the scanning direction of the laser beam is 45° with the length of the rail, after the last scanning process, the temperature of the rail is 200℃-300℃, and the structure is martensite and shellfish The laser hardened layer 4 of ...
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