About the characteristics and classification of alloyed coating
Alloyed coating is a very common production process, but many people do not know the specific role of alloy coating on the understanding of alloy coating.
There are many types of alloyed coating, which can be divided into single alloy layered coatings, multi-layered coatings and new layered coatings.
1. Tools: drill bits, sparks, etc.
2. Wear-resistant tools, including various metal molds, punches, rolls, knives, etc.
The current material industry continues to insist on various problems, including the outstanding needs of users and the outstanding aspects of material properties that need to be solved. Coating is an effective means for these new problems. The impact of coating on the life of cemented carbide far exceeds the impact of matrix surgery on the life. The development direction of alloyed coating will be:
1. Reduce the coating process temperature
2. Enhance the bonding force of the mold base
3. Agreement materials for labor disputes
4. Simpler and easier to control coating process equipment
Related knowledge about alloyed coating
Alloyed Coating is a thin layer of wear-resistant TiC or TiN that is coated on the surface of the cemented carbide blade by a coating method. Because of its high hardness, strength and wear resistance, it is known as the "industrial teeth", which can be used to manufacture cutting tools, knives, drilling tools and wear-resistant parts, and are widely used in military, aerospace, drilling, Mining tools and other fields. However, the strength and hardness of cemented carbide cannot meet the development needs of modern industrial alloys at the same time, so coatings that can improve the wear resistance of cemented carbide have emerged.
The main purpose of the alloyed coating is to further improve the wear resistance of the cemented carbide, and also to extend the life of the alloy tool, as well as:
1. Improve the performance of cemented carbide tools;
2. The needs of high-speed cutting and high-speed machining;
3. The need for machining difficult-to-process materials such as aviation heat-resistant alloys, composite materials, and hard materials.
Features of hard alloy coating:
The preparation processes of alloyed coating mainly include high temperature chemical vapor deposition, physical vapor deposition, plasma chemical vapor deposition and ion-assisted physical vapor deposition. Different processes have different coating mechanisms, advantages and disadvantages.
Advantages of automated laser cleaning and traditional cleaning methods
A century after Theodore Harold May became the world’s first ruby teacher, he could invent magical absorption in various fields. The application of laser technology in the fields of medicine, equipment manufacturing, painting and remanufacturing engineering, etc. The rapid development of science and technology has advanced the pace of social progress.
Automated laser cleaning refers to the use of high-frequency high-energy laser to irradiate stains, which can instantly absorb the surface finish and pollution layer, and use the energy of laser irradiation to instantly evaporate oil, rust or coating on the surface or remove the effective surface, and remove the additional surface at high speed Objects that are cleaned under the parameters of surface coating or surface coating with a short action time will not damage the metal foundation under appropriate circumstances.
Compared with the tracking tracking method, laser tracking has some advantages that the tracking tracking method cannot achieve. Tracking is a non-contact method of tracking, with little damage to the base frame, accurate segmentation, stability and automation characteristics, good tracking quality, high accuracy, and environmental protection. It is a "green" automated laser cleaning.
Development status of Automated Laser Cleaning technology
At present, my country's manufacturing industry is large but not strong and lacks core technology, which is particularly prominent in the field of surface treatment technology. The development of modern intelligent manufacturing requires surface treatment technology as the cornerstone, and advanced process methods to realize filling and replacement. This is an important challenge facing my country's manufacturing industry in the process of becoming stronger.
As a modern green cleaning technology,Automated Laser Cleaning is a product of industrial development in the new era. It has the advantages of saving time, labor, no damage to the substrate, and no pollution to the environment. According to statistics, the total global cleaning market in 2018 has reached 589 million U.S. dollars. It is expected that this value will climb to 724 million U.S. dollars by 2023. It can be seen that the introduction of Automated Laser Cleaning technology will bring extremely considerable economic benefits.
Compared with Western countries, the manufacturing technology and advanced level of my country's Automated Laser Cleaning equipment are still at a disadvantage, and the application coverage rate of my country's automatic laser cleaning technology is also relatively low, and it cannot completely replace the traditional cleaning process. The development of supporting laser cleaning equipment, and making it practical and industrialized in a short time is an important problem that Chinese scientific and technological workers need to solve, which is of great significance to promote the development of high-tech industries.
Laser surface quenching - Let the heat treatment of metal surfaces to be control
Metal heat treatment is one of the important processes in mechanical manufacturing, which can be divided into three categories: integral heat treatment, surface heat treatment and chemical heat treatment. Compared with other processing processes, heat treatment generally does not change the shape of the workpiece and the overall chemical composition, but by changing the internal microstructure of the workpiece, or changing the chemical composition of the surface of the workpiece, to give or improve the performance of the workpiece.
Laser surface quenching using high energy laser as a heat source, made the metal surface fast hot or fast cold, instantly complete the quenching process, without oil and water and other cooling media, get high hardness, ultrafine martensite structure, improve the hardness and wear resistance of the metal surface, and the formation of compressive stress on the surface, improve fatigue strength.
Compared with other surface heat treatment technologies (such as high-frequency quenching, carburizing, nitriding and other traditional processes), laser surface quenching has special advantages:
1) The quenching process is controllable: it can be imported into the quenching track by digital model, and the quenching temperature and quality can be precisely controlled by closed-loop method. Laser quenching can be carried out on large surface complex curved workpiece, such as mold, shaft, workpiece inner hole, etc.
2) local selection processing: precise control of hardening layer position, area, hardness, strengthening layer strength uniformity is good.
3) surface performance excellent : quenching martensite grain is very fine, high dislocation density, surface wear resistance and adhesion resistance can be greatly improved.
4) Small heat affected zone: laser surface quenching is extremely hot and quickly cold, the quenching process is completed in a very short time, and the quenching stress and deformation are small.
5) high hardness: hardening layer hardness is higher than the traditional quenching, wear resistance is doubled.
Hardness of guide rail after laser quenching
Application field
Because of its excellent heat treatment performance, laser surface quenching is widely used in mold, machinery manufacturing, petroleum, chemical industry, light industry, hardware tools, auto parts and other fields. Among them, metal alloy is the most widely used materials in industry, the microstructure is complex, can be controlled by laser heat treatment, change its mechanical, physical and chemical properties, in order to obtain different performance. Typical workpiece: mold, gear, shaft, thread, guide rail, cylinder liner, important military products, etc.
Die laser quenching
Laser quenching of gear ring
Axial laser hardening
Thread laser quenching
Laser quenching of cylinder liner
Lift wheel laser quenching
Quality creates brand, professional achieves high quality! WG-HG Laser have a professional team, rich experience, warm service and good prestige. Whether you need aser surface hardening equipment or laser surface hardening business, HG-HG laser share total win.PLS contact us for more detailed information.
laser cladding technology characteristics and industry application
Laser cladding,, uses a high energy laser as a heat source, metal alloy powder as welding material, through the laser and alloy powder (or wire material) synchronous action on the metal surface to quickly melt to form a molten pool, and then rapid solidification to form a dense, uniform and thickness controllable metallurgical bonding layer.
Roller High speed laser cladding
Compared with many traditional surface treatment technologies, laser cladding technology has the following significant advantages and characteristics:
1) High metallurgical bonding strength. Laser cladding makes use of the characteristics of high energy laser beam to gather high energy, which makes the workpiece surface melt instantly, and at the same time makes the alloy powder preset on the workpiece surface or automatically sent with laser beam melt completely. After scanning by laser beam, the matrix solidifies rapidly by self-cooling, so that the alloy layer of dense overlay combined with matrix metallurgy can be obtained.
2) Hardness and thickness are optional. After laser cladding, the hardness of the cladding layer can be selected from HRC20-62, and the cladding thickness can be adjusted according to the need.
3) wear and corrosion resistance. Laser cladding can be applied on the surface of common carbon steel workpiece, which is corrosion-resistant, wear-resistant and has excellent performance.
4) Reduce costs and energy consumption. By forming metallurgical bonding alloy coating on the surface of the substrate with different alloy composition and properties, laser cladding can produce high-performance alloy functional layer on the substrate with low cost and save material cost.
5) High cladding quality. Small deformation, good mechanical repeatability, compact interface structure, fine grain, no holes, no cracks and other defects.
Application of laser cladding
After decades of development, laser cladding technology has been widely used in metallurgical industry, coal industry, petrochemical industry, transportation, machinery manufacturing, mold industry, hardware tools and other industries from the laboratory into the actual industrial application.
1. Metallurgical industry
According to a preliminary estimate, the annual consumption of important parts and components in the steel rolling production lines in China amounts to 10 billion yuan. The traditional method is mainly to replace the parts of these equipment, or even because the parts can not be used to scrap or replace the whole machine, damage and failure and scrap parts or the whole machine is basically treated as waste, resulting in a large amount of waste of resources. Laser cladding can repair the equipment on the parts of metal base material preparation of high-performance alloy surface, can significantly improve the surface wear resistance, corrosion resistance, heat resistance, oxidation resistance and electric performance, not only can prolong the service life of the new parts, also can have wear parts for cladding repair, restore its original size, thereby reducing the cycle of replacement parts.
Laser cladding repair of side guide plate
Laser cladding repair of flat head sleeve
2. Coal machine industry
The characteristics of mining machinery and equipment: large volume, high price, difficult loading and unloading, and large maintenance workload. Therefore, when the parts stop running due to wear and tear, it will cause huge economic losses. Laser cladding can be used for surface remanufacturing of new and old parts, such as hydraulic cylinder, column laser cladding, so as to effectively improve the wear resistance and corrosion resistance of parts, prolong the service life of parts.
Hydraulic cylinder inner hole laser cladding
Laser high speed cladding for hydraulic cylinder
High thickness laser cladding for hydraulic cylinders
WISC laser high-speed laser cladding, not only faster than the traditional laser cladding processing speed, the surface is more smooth and smooth, and the processed parts, only need to finish processing can be put into production and use, save a lot of machining time and cost, will be a major technical force of laser surface remanufacturing in the future.
3. Petrochemical industry
In the petrochemical industry, it is particularly important to maintain the equipment parts regularly because the equipment works in the harsh environment for a long time, which is easy to make the products corroded and worn. Laser cladding can repair the failed parts by cladding, restore the original size, and effectively restore the use of equipment.
Laser cladding of drilling rods
Laser cladding of drilling tool components
4. Transportation industry
The transportation industry includes land, water and air transportation, etc. The characteristics of transportation equipment are high frequency of use and complex and changeable environment, leading to the need for regular maintenance of equipment. Laser cladding can repair all kinds of parts to restore their original size, so as to effectively improve the service cycle of parts.
Laser cladding of valve core
Cross shaft laser cladding repair
Laser cladding solves the problems such as the limitation of material selection, the thermal stress, the thermal deformation in the process, the coarse grain size of the material, and the difficulty in guaranteeing the bonding strength with the matrix, which cannot be solved by the traditional repair method. It can even produce a metal surface superior to the substrate, which can effectively extend the service life of parts while restoring the use of parts, and greatly reduce the production cost of enterprises.
Quality creates brand, professional achieves high quality! WG-HG Laser have a professional team, rich experience, warm service and good prestige. Whether you need cladding equipment or a laser cladding repair/remanufacturing process business,, HG-HG laser share total win.PLS contact us for more detailed information.
Laser Cladding Machine | laser cladding technology characteristics and industry application