Characteristics and application areas of laser quenching

Laser quenching technology solves many problems that cannot be solved by conventional heat treatment processes. It has been widely used in metallurgy, automobiles, molds, hardware, light industry, machinery manufacturing and other industries, and is suitable for heat treatment of various types of parts. How much do you know about laser hardening?

Laser quenching, also known as laser heat treatment, laser hardening, is the use of focused laser beams to rapidly heat the surface of metal materials to cause them to undergo phase transformation, forming a martensitic hardened layer. It is divided into laser phase transformation hardening, Laser fusion hardening and laser impact hardening.

Technical characteristics

1. Laser quenched martensite grains are finer, dislocation density is higher, hardness is higher, and wear resistance is better.

2. Minimal deformation, even no deformation, suitable for high-precision parts processing. In some cases, it can be used as the final processing procedure of materials and parts.

3. Tempering is not required, compressive stress is obtained on the quenched surface, and cracks are not easy to occur.

4. If the workmanship is good, the application area is wide, and it can easily handle large-size workpieces and local areas such as grooves, grooves, deep holes, inner holes, and blind holes.

5. The depth of the hardened layer can be adjusted as required.

6. The hardness gradient is very small, and the hardness basically does not change with the change of laser hardened layer depth.

7. Suitable for a wide range of materials, including various medium and high carbon steels, tool steels, mold steels, and cast iron materials.

8. Automatic control of processing process, short construction period and stable quality.

9. Low carbon and environmental protection, no cooling medium is needed, and no waste gas and waste water are discharged.

Application area

1. Large workpieces that are difficult to enter into a heat treatment furnace.

2. Workpieces that only need to heat-treat local surfaces such as grooves, grooves, holes, edges, and cutting edges.

3. The parts that are difficult to be treated by the conventional heat treatment process.

4. Precision parts that require high heat distortion.

5. Heat treatment of cast iron workpiece surface.

6. Parts that are prone to cracks in conventional heat treatment processes.

7. Parts that cannot meet the hardness requirements by conventional heat treatment process.

The development of laser quenching technology has improved the quality and service life of surface treatment in molds. The most effective way to reduce costs is to significantly improve and improve the surface properties of the mold, such as hardness, abrasion resistance, friction performance, and mold release, by using different surface treatment technologies to change only the composition, structure, and properties of the mold surface layer. Performance, heat insulation performance, corrosion resistance and high temperature oxidation resistance, improve the cavity surface anti-scratch ability, mold release ability, anti-seize and other special properties, several times, dozens of times to improve the mold life.

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