Argon-Hydrogen Mixtures can be used to cut stainless steel and aluminium. These mixtures produce a high-quality, clean cut face. For mechanized cutting of materials greater than 3 inches in thickness, Argon-Hydrogen must be used. This gas is also excellent for plasma gouging all materials. Websters defines plasma as “a collection of charged particles…containing approximately equal numbers of positive and negative ions, and exhibiting some of the properties of a gasoline but differing from a fuel in that it is a good conductor …”.of electricity. you can have a look at plasma cutter under 500 reviews. Besides, it can also be thought of as an electrically heated stream.
It is a state where electrons flow from atom to atom instead of orbiting. It doesn’t matter what is happening inside the plasma stream. The way to cut metals with it can be done very easily. You can take the electricity that is flowing through the gas and condense it using a small hole. This stream will be very dense and move extremely fast. This stream can melt or blow through most metals very easily. This is a plasma torch.
To constrict the flow of plasma through the torch, a copper nozzle is used. The arc moves from the electrode of the torch to another object, usually the conductive material being sliced. This is a ‘transferred arc’. Some systems use a non-transferred arc, where it jumps back from the electrode to the nozzle. However, these are rarely used for cutting. Plasma cutting can only be used with conductive materials, such as mild steel, stainless and aluminum. Many other metals and alloys can also be conductive, including copper, brass, inconel cast iron, titanium, monel and monel. Problem is that some metals are difficult to cut with good quality edges due to their melting temperatures. The electrode is typically made from copper with a metal insert at its attachment point.
The reason is that the copper would melt much faster if the arc was attached directly to it. Tungsten is a good electrode material so many electrodes have a Tungsten insert. A ‘pencil-style’ electrode is used by smaller torchers. It is entirely made of tungsten and has a sharpened tip. Tungsten is prone to burning in the presence Oxygen. The insert can be used with Oxygen or compressed oxygen as the cut gas. It is made from a material called Hafnium. Although Hafnium is more durable in the presence Oxygen than it is without Oxygen, it still wears slightly with each start to the arc.
Why use Oxygen in your plasma torch? You can use Oxygen to torch an acetylene torch for the same reason: the Oxygen from the plasma stream reacts mild steel. Pure Oxygen should only be used to cut mild steel (or ‘carbon steel’). The chemical reaction between Oxygen in plasma gas and base metal speeds up cutting and improves edge quality. Because Oxygen is not able to react with Stainless Steel and Aluminum, it can be used in a cheaper way, such as Nitrogen or compressed oxygen (which is mostly Nitrogen).