Laser quenching
Laser hardening is also known as laser phase transformation strengthening. Under the irradiation of the laser beam, the metal surface temperature rises above the phase transition point at a very fast speed. After leaving the irradiation zone, the metal material is cooled rapidly to achieve martensitic phase transition hardening.
Compared with the traditional induction quenching, flame quenching, and carburizing quenching process, laser quenching has the following characteristics:
| Characteristic | Description |
| The hardened layer is uniform | The hardness distribution in the quenching zone is uniform, and the hardness change in the depth of the layer is small |
| High hardness | Martensite has finer grains and higher dislocation density, generally 3-5HRC higher than induction hardening |
| Small deformation | The heating speed is fast, the heat affected zone is small, the quenching and stress deformation are small, and the processing amount is small |
| Forming residual compressive stress | It can significantly improve the surface hardness and wear resistance of the workpiece |
| Good controllability | Short process cycle, high production efficiency, easy to automate |
| No cooling medium | No cooling medium required, environment friendly |
| Good flexibility | The heating layer track and heating depth are easy to control and can be used for local hardening of deep holes, grooves, and thin-walled workpieces |
| Size is not limited | Processing of large workpieces is not limited by furnace size |
Laser quenching industry applications
Laser quenching technology solves many problems that can not be solved by conventional heat treatment process, such as hardening of thin-walled parts, hardening of the surface of inner perforated parts, etc. Laser quenching has been widely used in metallurgy, automotive, mold, hardware tools, tools, machinery manufacturing and other industries, suitable for heat treatment of various types of parts.
Mold industry
The mold industry is known as the "Mother of industry", because it is the basic equipment of manufacturing production, mold is an important way of material molding. It is an indispensable part of modern manufacturing. With the rapid development of China's modern industry, the mold industry has a huge role in it, but in the case of high temperature and high pressure, the mold is easy to deform, seriously affecting the quality of production products. Laser quenching effectively improves the local hardness of the mold, greatly improves the anti-wear and anti-mechanical damage ability of the mold, and extends the service life of the mold. It is suitable for all kinds of stamping dies, drawing dies, injection dies, and automobile covering die surface strengthening.
Hardware tool industry
Hardware scissors are exposed to air and harsh production environment for a long time, so there will inevitably be a failure. If it is scrapped directly, it will greatly increase the cost of purchase. At present, the main reasons for the failure of hardware knives and scissors are cutting-edge wear, blade breakage, corrosion and other problems. Laser quenching can improve the surface hardness of the tool, extend the use time of the tool, and avoid the cost of premature failure of the tool.
Machinery parts industry
Because the mechanical equipment works in a harsh environment for a long time, it is easy to lead to corrosion and wear of parts. However, the mechanical equipment is large, expensive, and difficult to load and unload, and the maintenance workload is large. Therefore, when the parts stop running due to wear and tear, it will cause huge economic losses. Laser quenching can greatly improve the service life of mechanical parts, and is an important way and method to reduce production costs and improve economic benefits.
The advantages of laser hardening
Laser hardening is suitable for a wide range of materials, carbon steel, alloy steel, bearing steel and other medium and high carbon steel, and cast iron can be used. It can improve the surface hardness, wear resistance, strength and high temperature performance of metal materials and parts; At the same time, it can make the parts maintain good toughness, with good wear resistance, high impact toughness, high fatigue strength and other mechanical properties.
Xi'an Guosheng Laser Technology Co., Ltd. is a high-tech enterprise specializing in R&D, manufacturing and sales of automatic laser cladding machine, high-speed laser cladding machine, laser quenching machine, laser welding machine and laser 3D printing equipment. Our products are cost-effective and sold domestically and abroad. If you're interested in our products, please contact us at bob@gshenglaser.com.