Wear-resistant guide plate and laser remanufacturing process thereof

Abstract

The invention discloses a wear-resistant guide plate, and is used to solve the problem that the bottom of a guide arm cannot be used after being worn out in the prior art, and can only be replaced, thereby affecting the production efficiency and increasing the use cost. The wear-resistant guide plate comprises the guide arm, and further comprises a guide plate. The guide plate is detachably installed at the bottom of the guide arm to replace the original friction part between the guide arm and a steel plate. Because of the detachable connection, the replacement speed is faster than replacing the entire guide arm and the impact on production efficiency is minimal. Furthermore, the surface treatment of the guide plate through laser remanufacturing process increases the surface hardness. At the same time, during the processing, the two sides of the guide plate have the same structure and can be used directly by turning over, thereby prolonging the service life and reducing the frequency of replacement. In addition, compared with other thermal cladding technologies, the laser remanufacturing process consumes lower energy and more concentrated heat and can improve processing efficiency.

Description

technical field [0001] The invention belongs to the technical field of laser reprocessing, and in particular relates to a wear-resistant guide plate and a laser remanufacturing process thereof. Background technique [0002] Such as figure 1 Shown is the roller table part of steel plate transportation in the rolling process, mainly including: driving device 1, moving roller 2, guide arm 3, the driving device 1 is located at both ends of the roller table, driving the moving roller 2 to rotate, and after a The rolled steel plate will move forward with the rotation of the rotating roller. In order to prevent the movement of the steel plate from deviating from the direction, guide arms 3 are arranged on both sides of the moving roller 2. The angle of the guide arm 3 can be adjusted to limit the direction of movement of the steel plate. , but because the temperature of the steel plate during the rolling process is very high, and the friction force between the guide arm 3 and the ...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 Shown is the roller table part of steel plate transportation in the rolling process, mainly including: driving device 1, moving roller 2, guide arm 3, the driving device 1 is located at both ends of the roller table, driving the moving roller 2 to rotate, and after a The rolled steel plate will move forward with the rotation of the rotating roller. In order to prevent the movement of the steel plate from deviating from the direction, guide arms 3 are arranged on both sides of the moving roller 2. The angle of the guide arm 3 can be adjusted to limit the direction of movement of the steel plate. , but because the temperature of the steel plate during the rolling process is very high, and the friction force between the guide arm 3 and the guide arm 3 is relatively large during the movement, it will cause a groove to be worn out on the part of the guide arm 3 and the steel plate that often contacts. It is uneven, so the guide arm 3 that wears to a certain extent can no longer be used, and under normal circumstances, the daily output of a medium and large steel rolling mill can at least reach the production capacity of millions of tons, such a large workload will lead to The guide arm 3 needs to be replaced frequently, and the production line needs to be stopped every time it is replaced, which reduces the work efficiency in a disguised form and increases the cost of use. In order to solve this problem, the existing technology mainly adopts more wear-resistant material or surface processing

[0003] Laser remanufacturing technology is an advanced surface processing technology that integrates cladding processing, laser cladding material technology and other technologies. It can not only restore the shape of damaged parts, but also make its performance reach or even exceed that of new products. level, and the cost of laser remanufacturing is only 50% of the cost of new products, and energy saving is 60%. Among them, laser cladding is the most widely used one. Laser cladding refers to placing selected coating materials with different fillers on the surface of the coated substrate, and irradiating them with laser The surface of the substrate is melted at the same time, and after rapid solidification, a coating with extremely low dilution and metallurgical bonding with the substrate metal is formed. However, due to the small laser spot, the volume of the molten pool formed is also small, so it cools faster, which is typical In the process of rapid heating and rapid cooling, excessive thermal stress will be generated during the cladding process, which increases the possibility of crack defects in subsequent use

[0004] The method of strengthening by laser coating is more commonly used. For example, the invention patent with the authorized announcement number CN105779925B discloses "A Method for Laser Coating by Supersonic Flame Spraying Preset Powder", which discloses the method of laser coating by supersonic flame spraying. The method of combining sonic flame spraying and laser cladding can alleviate the problem of rapid cooling and rapid heating in the laser cladding process through pretreatment, so it can provide a refined laser cladding layer structure and improve the quality of the laser cladding layer, but this method It is not suitable for wear-resistant guide plates, because the use environment of the guide plate is relatively harsh, the ambient temperature is high, the higher the temperature of the guide plate, the hardness will decrease, so it cannot achieve the best use in the guide plate effect, and the steel rolling production line is often running 24 hours a day, and it will only stop when it is overhauled. Therefore, the longer the use time, the higher the temperature, and the easier it is to wear. Therefore, the existing technology is not suitable for use in guided laser remanufacturing. in process

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