Welding of Metals

Welding is a technique used to join metal parts using heat or pressure, where the melting points of the materials are closely aligned. There are various welding processes, categorized into seven environmental impact classes, ranging from class I (least harmful) to class VII (most harmful). Key welding methods include MIG/MAG, TIG, laser, and robotic welding.
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Explore the Variety and Environmental Impact of Modern Welding Techniques

Welding is a joining technique in which metal parts are fused together using heat or pressure. In welding, the melting points of the base materials and any filler materials are close to each other.

Welding Classes

The different welding processes are divided into seven classes, with class I being the least environmentally harmful and class VII the most.

The classification depends on the welding process used, the type and amount of filler material, electrode, and the material being welded.

  • MIG/MAG welding
  • TIG welding
  • Laser welding
  • Robot welding
Trough welding Klinkenberg Zaanstad
TIG welding Klinkenberg Zaanstad
Tube to flange TIG weld Klinkenberg Zaanstad

Welding Tips

During the welding of metals, stresses can occur around the weld seam. These stresses may lead to cracking. By preheating the steel around the weld area, you can significantly reduce stress formation. The temperature difference between the weld and the base material becomes smaller, which lowers thermal stress.

  • Qualified personnel
  • High-standard welding machines
  • Quality assurance
  • Top quality and durability
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The importance of temperature control in welding Welding tips

Additionally, unwanted hardening effects are avoided by slowing the cooling rate after welding. This reduces the risk of cold cracking. Preheating allows hydrogen present in the material (which causes cracking) more time to dissipate. Another reason to keep the cooling rate low is to prevent bonding defects. If the material cools too quickly, it may lack the residual heat needed to properly fuse the weld edges.

Use a contact thermometer when measuring interpass temperatures. These are highly accurate. Infrared thermometers can give inconsistent readings due to surface reflections and are therefore less reliable.

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MIG/MAG Welding

In MIG/MAG welding, a wire electrode is continuously fed from a spool by a motor and becomes electrically charged near the tip of the welding torch through a contact tip. This allows an arc to form between the wire and the workpiece. Shielding gas flows from a nozzle that concentrically surrounds the electrode wire.

This gas protects the weld pool from atmospheric gases such as oxygen, hydrogen, and nitrogen. Besides its protective role, the shielding gas also influences the arc atmosphere composition, which affects conductivity and welding characteristics. Additionally, it impacts the chemical composition of the weld metal through alloying and burn-off processes, providing a metallurgical effect as well.

 
 

TIG Welding

TIG welding is a highly versatile method suitable for various materials, thicknesses, and welding positions. It produces joints of the highest quality. The name TIG stands for Tungsten Inert Gas welding – also known in Germany as "Wolfram-Inertgasschweißen" according to DIN 1910 – Part 4. In the US, the process has been known as "argon arc welding" since 1936.

Any metallic material suitable for fusion welding can be joined with this method. TIG welding is a particularly "clean" technique that produces minimal spatter and few harmful substances. It delivers high-quality welds when used correctly. A major advantage over methods using consumable electrodes is the separate control of filler material and current. This allows the welder to precisely adjust the current to the task at hand and add only the amount of filler material that is actually needed.

Variants

MIG/MAG lassen voor staal

MIG/MAG lassen voor staal

TIG lassen voor RVS

TIG lassen voor RVS

MIG/MAG schroefas

MIG/MAG schroefas

TIG schroefas Klinkenberg

TIG schroefas Klinkenberg

Documentation

Bulk Density Table

Bulk Density Table

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