Laser Hardening Machines
Laser hardening machines are advanced devices that use high-energy laser beams to rapidly heat metal surfaces and then quench them, thereby increasing surface hardness and wear resistance. They are widely used in industrial manufacturing, aerospace, automotive, and other fields.
Description
LASER HARDENING
PRECISE SURFACE HARDENING WITH LASER MACHINES FROM TOCHTECH LASER
Heavily stressed metallic parts and machine components are specifically treated with laser hardening to prevent wear, tear, and deformation of the components. The mobile laser hardening system from TOCHTECH scans and hardens the corresponding workpiece precisely along its contour without needing to remove it. Our laser hardening system can be flexibly used right on the workpiece – you save time and costs for the benefit of your production.
Laser-based surface hardening is one of the fastest laser material processing methods for the production of resilient metal parts that are also hardened with low distortion. This laser hardening system is not only good at efficient laser beam hardening: with the right accessories it can also be used as a laser welding device for powder deposit welding. Opt for flexibility and precision in laser hardening with modern laser technology and high-quality laser devices for mold manufacture, mechanical engineering, and many other industries.
How does laser hardening work?
1. Pretreatment Stage
·Surface Cleaning: Remove oil, rust, or coatings from the workpiece surface to ensure laser absorption.
·Blackening: Certain metals (such as aluminum alloys and stainless steel) have high reflectivity and can be sprayed with a light-absorbing material (such as a phosphate coating) to improve laser absorption efficiency.
2. Laser Quenching Process
Immediately after heating, the cold part of the component cools down the treated spot (self-quenching) and thus ensures that the austenitized metal structure is rendered permanent.
The result is martensite (a very tough metal structure that looks very fine under the microscope), which is responsible for the increased hardness of the material.
3.Post-processing (optional)
Tempering: Some high carbon steel or alloy steel may be subjected to low temperature tempering after quenching to reduce brittleness. Surface polishing/inspection: Check the hardness and depth of the quenched layer and whether there are any defects such as cracks.
Advantages of laser hardening
·No transportation of components, pressing tools and moulds required
·The process is independent of the size of the respective components, pressing tools and molds
·Elimination of costs for packaging, transportation and transport insurance for the components
·Avoidance of possible transport damage
·The workpiece does not necessarily have to be removed
·The service provider's customer can accompany the process directly
·Acceptance and quality control can be carried out directly after laser hardening has been completed. Any rework or changes are carried out immediately
·Spontaneous additional tasks can also be carried out directly
Typical Application Areas
Automotive Industry: Engine components, transmission gears, piston rings, etc.
Aerospace: High-strength components such as turbine blades and landing gear.
Mold Manufacturing: Surface hardening of injection and stamping molds.
Machining: Cutting tools, rollers, machine tool guides, etc.
Energy Equipment: High-temperature-resistant components for nuclear and thermal power plants.
FAQ
Q: What is laser hardening?
A: Laser hardening is defined as a surface modification technique where a workpiece surface is heated for a short period using high power laser radiation, followed by rapid cooling, resulting in structural changes that lead to a harder surface.
Q: What is the difference between laser hardening and induction hardening?
A: Being similar to induction hardening, laser hardening relies on the thermal mass of the component to quench the area to be treated. There is no need for quenching in water or oil to achieve the hardness you require. Lasers tend to produce harder surfaces to a shallower depth compared to other hardening processes.
Q: Is laser hardening the same as case hardening?
A: Laser Hardening is a case hardening process , a heat treatment process in which high powered diode laser beams are scanned over work-piece material to heat localized areas of the surface. It is used to increase the strength and durability of material.
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