Laser Welding & Soldering

Laser Welding is easily recognised by its' exceptionally uniform and fine joints. Lasers are excellent for welding thinner materials, hermetically sealed joints, or welding in close proximity to heat-sensitive components thanks to the minimal Heat Affected Zone of the process compared to conventional welding methods.
The laser also excels for hard-to-reach spots as long there is a free line of sight between the nozzle and weld area. 

Laser welding can be done in virtually all conventionally weldable materials, but also typically incompatible materials like high-carbon Stainless Steel and Titanium, among many others.

Laser Welding

LMI AB has a Long History of Designing Tailored Laser Welding Solutions, Ranging From Micro-Scale Medical to Large-Scale and Volume Automotive Industries. Below are Some Examples of Custom Systems We've Built.
We have a Wide range of high-power lasers from 500W - 12kW and specialised equipment with pulsed Nd: YAG lasers for welding thin materials and production of hermetically sealed joints.


Vehicular Industry, Complex Shapes, Precision Cutting, Plate Cutting, Tube Cutting, Medicinal Manufacturing. 
Fine electronics, Pressure Vessels.


Carbon Steel, Stainless Steel, Aluminium, Titanium, Platinum, Plastics.

LMI CLW 1000

The birth of the LMI CLW 1000 machine concept resulted from our customers' need for a compact and user-friendly heavy-duty ABS ring welder with short cycle times.

Its minimalistic control panel and custom-made GUI makes this welder an extremely operator-friendly turnkey welding package.
When equipped with an IPG fiber laser up to 2 kW, the air-cooled laser source can be installed inside the Class 1 protective cabinet. The result is a very compact independent turnkey system that can be fitted with any fixture or tooling to fit the need of many customers

ST2000 Laser welder


The Mini-FlexPro® Laser Welding workstation is a platform LMI has used several times for custom welding systems, and can be fitted with up to 7 axis.

Hybrid Laser welding

Hybrid laser welding is a combination of the more Conventional MIG / MAG technique and laser processing.
The intense energy delivered by the laser in combination with an Effective melting of the MIG / MAG welding wire results in high-speed welding That can bridge large gaps between surfaces. 

The process Provides significant advantages Compared to
MIG / MAG Merely by the fact That it is given a much lower distortion and can be reunited with Gina sweep Components That Reduce cycle time and avoid rework.  Common hybrid welded materials include aluminum alloys and carbon steel.

Remote welding - galvo controlled laser welding

Remote welding or galvo based welding differs from traditional laser welding by the fact that the workpiece does not have to move, instead the beam is guided by the two moving galvo mirrors inside the scanner. Small movements of the mirrors leads to large movements of the focused beam, resulting in beam velocities of 500 ips (13 m / s). Remote welding is typically used for thin or sheet materials that require a series of stitches or points to be strong enough. 

The galvos rapid and precise positioning of the beam between the welds significantly reduces the total cycle time. Process area (or field of view) varies but can be as large as 1 x 1m. With applications ranging from spot welding of electronic devices to joint welding of sheet steel for cars.

​​​​Advantages of laser welding

  • Minimal heat input, provides a small heat-affected zone (HAZ)
  • Fine-grained treatment with exceptional welding quality
  • High energy density and high welding speed
  • No filler material required for most applications
  • Welding in hard-to-reach areas
Our partners provide experienced application engineers to help to create a process for welding Normally Incompatible materials.
LMI AB is capable of performing metallurgical evaluations and our staff is experienced in destructive and non-destructive techniques (eg. ultrasound, x-ray, helium leak detection) for Assessing weld quality.

We're experienced in hybrid and induction assisted laser welding as well as cold wire fed welding. Sometimes, this is a necessity if the weld chemistry requires changes to meet the design requirements.

Below you can see various ready-made laser welding system from Preco. Contact us to find out if laser welding matches your needs for materials processing.

Laser soldering

Laser Soldering is a process wherein material is supplied on a portion of the surface or workpiece.
Various high power lasers can be used for laser soldering, e.g. CO2, Nd: YAG, diode and fiber lasers.

The laser soldering process is ideal for creating a completely new surface, as well as to repair damaged or worn surfaces (renovation). It is also possible to create burred coatings for various functions where the material composition of the coating can be changed in real-time, which in turn results in that the material properties can be tailored to particular areas of the component/material. This technique is used, for example, in the construction equipment industry because it increases the wear resistance of the equipment in order to last longer.

How Laser Soldering works

Normally a powder is supplied to a substrate which then gets fused together by a laser beam.

The solder (filler material) may also be supplied in wire form.
The process yields a 100% tight joint where the base material dilution is minimal which gives improved resistance to corrosion and wear and also increases durability when used for laser clad metals.


Aeronautical industry, Vehicle Manufacturing, Marine, Oil & Gas production, Infrastructure, Electricity production, Electronics Refurbishing, Engine refurbishing, Surface hardening etc.


Carbon Steel, Carbide composites, Cobalt Superalloys (*Stellite®), Stainless Steel, Titanium alloys, Nickel based superalloys.

Advantages of laser soldering

There are many advantages of laser soldering compared with normal soldering, traditional welding or surface hardening.
  • Provides denser coatings with little to no porosity, finer surfaces, more consistent layer thicknesses and more accurate placement of the coating compared to traditional thermal spray techniques.
  • The process requires little heat input which gives little dilution, fine microstructures, small heat affected zones (HAZ) and low distortion.
  • Reduces production cycle = increased efficiency.
  • In some applications, laser soldering restore parts to their original size without additional manual intervention.
  • Improves the material's natural resistance to corrosion, wear and oxidation.
The application engineering team at Preco has extensive knowledge in laser welding and metallurgy. Preco has also developed standard laser soldering systems such as the SL Series, ST Series and RT series. Contact us for further information on how we can help you improve production using laser soldering.

Enter your contact details below, or give us a call and we will be happy to help you find the best Laser Solution. Thank you for the interest!