Workpiece shape of a larger size, weight tonnage scrapped due to the surface of the defect which is a shame, while the use of laser melting technique to repair fully meet the workpiece performance requirements, to reduce the number of workpiece scrap, and reduce the cost of spare parts production. Laser melting quenching is the laser molten metal surface, the laser beam is removed, the molten metal directly from liquid hardened solid, the formation process of surface hardening layer. Allow the metal surface melting due to laser melting quenching, the actual operation can use more than the laser hardening with high power density and slow scan speed, laser melting the hardened layer depth than the former deeper. The manufacturer of green laser pointer adopting red laser module is more than that of the green laser module.
The common characteristics of the laser hardening and surface melting, do not need to change the composition of the material, the main advantage of the characteristics of the roll material itself, the martensitic transformation to strengthen the roller surface. Laser quenching and the quenching of fused pre-coated with a layer of absorbance coating to enhance the absorption rate of the roll surface of the laser. For laser surface melting, the use of paint should also play the role of the molten pool leveling and slagging. Therefore, the coating formulations smooth implementation of laser technology and the hard layer organization and performance of essential. Laborers laser after years of exploration, research and development of laser quenching and the quenching of the fused series of light absorbing coatings, laser hardening of the various types of materials hardened layer evenly distributed. The difference of green laser pointer will be showed in such various indices as the using temperature, using lifetime, reliability and safety and so on.
In particular, laser melting quenching paint, add of absorbance bath leveling material fused after quenching hardened layer of smooth, flat, as long as a small amount of processing, you can get a flat surface. Therefore, particularly suitable for a variety of roll laser surface hardening treatment. Applications – laborers laser production of dual-gantry multi-function CNC laser cutting machines. The laser processing machine to meet the metallurgical industry, various types of roll (including strip roll, profile roll, rod and wire roll, etc.) in different parts of the surface strengthening and repair process. Also to meet the blade, circular saws, surface hardening of the guide bit, and other consumable parts and repair requirements. The red laser beam and green laser beam of the green laser pointer are also different in the power and energy consumption.
Due to the particularity of the laser texturing technology, rolls, cold-rolled production, cold finished, produce a positive impact on other texturing methods can not be replaced. Laser texturing process can significantly increase the roll service life analysis of the wool processing principles and the rolling process, can be easy to understand the improvement of laser texturing roll life of mainly achieved through the following three ways. Surface modification and grain refinement strengthening the role of laser texturing, the active region of the roll surface material fused very fast (heating rate of up to l06 ~ 109 ° C / s cooling rate ≥ 105 ° C / s, much higher than the water quenched) ultrafine grained (deep sub-micron to nanometer) can be formed even amorphous structure, its hardness is over HV900 (HRC67), much higher than the extent of conventional quenching can be achieved, the high hardness of the surface structure of the roll surface abrasion resistance. The consumption of the green laser beam of green laser pointer will be 1.5 or 2 times of that of the red laser beam.
Gross morphology of wear the role of laser texturing roller surface morphology changes, texturing the formation of micro-pits and the convex hull of uniform at the roll surface. The roll surface topography is conducive to improve the rolling friction between the roller and the plate state, but also conducive to maintaining good lubrication conditions. Uniformly distributed micro-pits can also play a collection of wear particles and prevent them from wear and tear rolls and scrapes the role of the board. The toughening effect of surface stress relaxation in order to enhance its service life, usually cold rolling work rolls, the surface hardening treatment. The higher the required hardness, the effect of volume expansion caused by the martensitic transformation is more serious, the greater the compressive residual stress. Compressive stress is too large, easily lead to the roll surface burst, but endanger the use of the roll, which is harmful. The receiver and emitter of green laser pointer laser pointer are used.