Technoweld News

Gas Tungsten Arc Welding best practice

Gas Tungsten Arc Welding best practice

Gas tungsten arc welding is a process where a non-consumable tungsten electrode is used to produce the weld. Welders can encounter various issues in the GTAW process so we have compiled our best practice advice for gas tungsten arc welding in an effort to prevent or...

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Basics of distortion in welding

Basics of distortion in welding

How does distortion occur? Welding usually involves heating of the materials at the joint to fuse them together. This heat creates expansion and contraction. If the heating and cooling is uneven, distortion can occur. This distortion comes from residual stress. There...

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Gas Metal Arc Welding – Power Circuit

Gas Metal Arc Welding – Power Circuit

In part 3 of the Gas Metal Arc Welding (GMAW) blog, we will discuss the power circuit. Often people forget the basics when setting up gas metal arc welding machines, it’s these basics that create a lot of frustration with welders. Welding is complex but it doesn’t...

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An overview of the mechanical properties of metals

An overview of the mechanical properties of metals

Mechanical property is a material’s capacity to cope with a range of applied external forces such as shear stresses, load, weather conditions, and time. Mechanical engineers can measure the ability of the metal to resist shearing, stretching, twisting, compressing or...

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Why do we use Colour in Welding?

Why do we use Colour in Welding?

You may be a sculptor creating a new piece of welded steel artwork, the colours are unlike anything else. Welding in itself is an art. The various colours of both welds and adjacent metals do not just look great, the colours indicate a lot about the weld. They combine to enhance the finished object. An example is when TIG welding stainless steel pipe for the pharmaceutical industry, where any weld colours above gold or straw are not desirable.

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The Basics of Electricity in Welding

The Basics of Electricity in Welding

Arc Welding is the process by which two pieces of metal are joined together by the use of electrical energy. Arc welding creates an electric arc that melts the base metal and typically a filler wire. The subsequent pool of molten metal then solidifies and fuses the edges of the parent material to join the metal together. To make this possible, electricity is passed from the power source through an electrode. The electric current is converted to heat due to the resistance in the flow of electrons across the air gap. This intense electrical energy creates an arc.

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WPS, PQR and WPQ: The Acronym Soup Explained

WPS, PQR and WPQ: The Acronym Soup Explained

The basic requirement of welding management is having a qualified welding procedure and qualified welders to AS1554 or AS3992. When starting a project, it is important to understand what the project requires, or you may get caught out. As a minimum, the purchase order...

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