Basic Information:

1. Laser cladding refers to the process of adding external materials to the molten pool formed by the laser irradiation of the matrix by synchronizing or presetting the materials, and making the two together rapidly solidify to form a cladding layer.

2. Laser cladding characteristics: The cladding layer has low dilution but strong bonding force, and is metallurgically bonded to the substrate, which can significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance or electrical properties of the surface of the substrate material, so as to achieve surface improvement. To meet the specific performance requirements of the material surface, it can save a lot of material costs. Compared with surfacing, spraying, electroplating and vapor deposition, laser cladding has the characteristics of small dilution, dense structure, good combination of coating and substrate, more suitable cladding materials, and large changes in particle size and content. Therefore, laser cladding technology The application prospect is very broad.

3. From the current application of laser cladding, it is mainly used in three aspects: first, surface modification of materials, such as gas turbine blades, rolls, gears, etc.; second, surface repair of products, such as rotors , mold, etc. Relevant information shows that the strength of the repaired components can reach more than 90% of the original strength, and the repair cost is less than 1/5 of the replacement price. More importantly, the repair time is shortened, which solves the problem of continuous and reliable operation of major complete sets of equipment in large enterprises. The problem of quick repair of rotating parts that must be solved. In addition, laser cladding super wear-resistant and anti-corrosion alloy on the surface of key components can greatly improve the service life of parts without deformation of the surface of the parts; laser cladding treatment on the surface of the mold not only improves the strength of the mold, but also It can reduce the manufacturing cost by 2/3 and shorten the manufacturing cycle by 4/5. Third, laser additive manufacturing. By means of synchronous powder feeding or wire feeding, laser cladding is performed layer by layer to obtain parts with a three-dimensional structure. This technology can also be called laser melting deposition, laser metal deposition, laser direct melting deposition, etc.

4. Cladding materials: The widely used laser cladding materials mainly include: nickel-based, cobalt-based, iron-based, titanium alloys, copper alloys, granular metal matrix composite materials, ceramic materials, etc.

Process equipment principle:

Cladding process: Laser cladding can be roughly divided into two categories according to the supply method of cladding materials, namely preset laser cladding and synchronous laser cladding.

Preset laser cladding is to place the cladding material on the cladding part on the surface of the substrate in advance, and then scan and melt it by laser beam irradiation. The cladding material is added in the form of powder or wire, and the form of powder is the most commonly used.

Synchronous laser cladding is to synchronously send powder or wire cladding materials into the molten pool through the nozzle during the cladding process. The cladding material is added in the form of powder or wire, of which the form of powder is most commonly used.

The main process flow of preset laser cladding is: substrate cladding surface pretreatment---preset cladding material---preheating---laser cladding---post heat treatment.

The main process flow of synchronous laser cladding is: substrate cladding surface pretreatment---preheating---synchronous laser cladding---post heat treatment.

According to the process flow, the processes related to laser cladding are mainly the pretreatment method of the substrate surface, the feeding method of the cladding material, the preheating and the post heat treatment.

Laser working principle:

The complete set of laser cladding equipment consists of laser, cooling unit, powder feeding mechanism, processing table, etc.

Laser selection: The mainstream laser types all support the laser cladding process, such as CO2 lasers, solid-state lasers, fiber lasers, semiconductor lasers, etc.

Shenyang Jinyan Laser Remanufacturing Technology Development Co., Ltd. is looking forward to your cooperation!

Contact: Wang Yunsheng

Contact: 13898848281

Company address: Shenyang Economic and Technological Development Zone, No. 13A, No. 23 Road, South Development Zone-1