Welding and Cutting

Tungsten is a metal used as the electrode in Tungsten Inert Gas (TIG) welding. It has a high melting point and is non-consumable, so it does not melt during the welding process. Tungsten helps create a stable arc and allows for precise control in TIG welding.

Welding is a process that involves cohesion, as it involves the joining of similar materials by melting them together to form a strong bond. Adhesion, on the other hand, involves the bonding of different materials.

Yes, hydrogen can be used for welding in certain applications, particularly in atomic hydrogen welding. This process involves using a hydrogen torch to produce a high-temperature flame for welding purposes. However, the use of hydrogen for welding is less common compared to other gases like acetylene or argon.

Arc welding temperatures can range from 5,000°F to 20,000°F, depending on the specific welding process and materials being used. These high temperatures are generated by an electric arc formed between the welding tool and the workpiece.

Argon is good in welding because it acts as a shielding gas to protect the weld pool from atmospheric contamination, such as oxygen and nitrogen. This helps prevent oxidation and produces cleaner and stronger welds. Argon also helps stabilize the electric arc during welding, resulting in better control and improved weld quality.

Ignoring all the normal problems you could have in welding (see other answers) - Argon welding has specific concerns that you normally do not find in other types of welding. Never weld in an enclosed area (without air movement) Argon is a 'heavy' gas that displaces oxygen, if you were to weld with argon above a depression (tank, pit, pipe) the area below could become filled with Argon and entry could cause suffocation and or death. A small space can fill with argon quickly, and a air tight space can fill without detection. Also argon as a compressed gas can cause burns if the line is ruptured (-302F).

The current in welding must be adjusted to achieve the proper heat input to melt the base metals and the electrode, creating a strong bond. Too low of a current can result in incomplete fusion, while too high of a current can lead to excessive heat input and potential burn-through of the base metal. Adjusting the current allows for control over the weld puddle size and penetration depth.

Oxy-fuel welding is a welding process that requires O2 gas. It uses oxygen and a fuel gas, such as acetylene, to create a high-temperature flame for the welding process. The oxygen supports combustion and helps create the heat needed to weld the materials together.

No, sound waves cannot be used to weld materials together. Welding typically involves the use of heat to melt and fuse materials together, with additional methods such as pressure or filler material used to form a strong bond. Sound waves do not generate sufficient heat or force to create a weld.

Oxy-Acetylene. A mixture of oxygen and acetylene.

Commerically it is still acetylene, however, its chemical name is 'ethyne'. Its structure is 'H-C///C-H'.

NB The symbol '///' repreent a triple bond between the two carbons.

A straight weld bead on the surface of a plate with little or no side-to-side electrode movement is called a stringer bead. It is a type of weld bead characterized by its uniform and straight appearance, typically achieved through consistent and controlled forward movement of the welding electrode along the joint.

Oxygen is stored at a much higher pressure than acetylene, which requires a larger cylinder to contain it safely. Additionally, oxygen is less dense than acetylene, resulting in the need for a larger volume to store the same amount of gas.

In dry welding for underwater welding, a hyperbaric chamber is used to create a dry, pressurized environment for the welder to work in. The chamber is sealed to prevent water from entering and is pressurized to balance the external water pressure. The welder enters the chamber through an airlock system and performs welding tasks with the help of specialized equipment and gas supply systems.

Shielding gases in welding protect the molten metal from reacting with the surrounding air, which can lead to defects like porosity and oxidation. They also help stabilize the arc and improve the quality of the weld by controlling the heat input and transfer.

A non-luminous flame is typically used to detect oxygen deficiency, as it burns with a blue color due to complete combustion in the presence of adequate oxygen. If the flame turns yellow or flickers, it could indicate a lack of oxygen and the presence of other gases like carbon monoxide.

To check for defects like incomplete penetration and lack of fusion in welding, you can use techniques like visual inspection, ultrasonic testing, penetrant testing, or radiographic testing. Visual inspection involves visually examining the welded joint to look for discontinuities. Ultrasonic testing uses high-frequency sound waves to detect defects below the surface. Penetrant testing involves applying a dye to the weld and then inspecting for any surface-breaking defects. Radiographic testing uses X-rays or gamma rays to detect internal defects.

In resistance welding, the heat for fusion is generated by passing a high electrical current through the materials being welded. The resistance of the materials to the flow of electrical current causes them to heat up rapidly at the interface, melting and fusing together.

Oxy-Gasoline is an effective fuel and is very good when traditional gas bottles are not available. Hydrogen is a good fuel when welding aluminium but is not used when welding steel because it damages the steel. Propane, butane and butane/propane mixes are also used.

Negative to Positive.

Weld decay is a form of intergranular corrosion that occurs in stainless steel welds when they are exposed to certain environments, particularly those with high temperatures. This corrosion can lead to degradation of the weld's mechanical properties and overall performance. To prevent weld decay, proper welding techniques and selection of appropriate filler materials are crucial.

A heavily oxidized weld deposit refers to a weld that has been exposed to oxygen during the welding process, leading to an excessive formation of oxides on the surface. This can weaken the weld's integrity and compromise its mechanical properties. It is important to avoid excessive oxidation during welding by using shielding gases or fluxes to protect the weld from oxygen.

You can use a welding curtain or shield to block the magnetic field generated during welding. Additionally, maintaining a safe distance from the welding area can help reduce exposure to the magnetic field. Using proper grounding techniques for the welding equipment and ensuring a well-ventilated workspace can also help minimize the effects of the magnetic field.

It causes too much oxidation, and it doesn't burn hot enough to weld with anyway. You can braze non-ferrous metals with it; some jewelers like it because you can hook up to the natural gas line coming into the building and go for it.

DCEP supplies about two-thirds of the heat at the end of the rod, which allows more digging action, or penetration, into the base metal. It's what you want to use for thick steel. For thin steel, direct current electrode negative (DCEN) is best.

Welding current is typically generated through a power source that converts electrical energy into a suitable form for welding. This can be done through mechanisms like transformers, rectifiers, or inverters, depending on the type of welding process being used. The current is then delivered to the welding arc, where it generates the heat necessary to melt and join the workpieces.