General Components of the Gas Metal Arc Welding

General Components of the Gas Metal Arc Welding

The gas metal arc welding torch is made of the following components: -welding power supply with mains supply and welding lead -wire feeding with wire spool and wire feed unit -shielding gas supply and inert gas flow meter and magnet valve -control module for central control and handling of the machine -hose package with torch [...]

General Introduction to Submerged Arc Welding

General Introduction to Submerged Arc Welding

The arc burns invisibly between a melting electrode and the work piece, or between two melting electrodes. Arc and welding zone are covered by a layer of flux. The weld pool is protected from the admission of the atmosphere by slag developed by the flux. The shown cross-section shows that the weld pool is covered [...]

The autogenous technique

The autogenous technique

This technique (autogenous (lat.) = self working) means working with materials or heating of workpieces by means of a flame. The term “Autogenous Technique” includes different processes, where the process heat is generated by a flame. Important Flame Processes The heat source is a chemical reaction resulting from the combustion of the fuel gas with [...]

Manual Arc Welding - Manual Arc Welding Apparatus

Manual Arc Welding – Manual Arc Welding Apparatus

Manual arc welding is a manual welding process. The arc (about 5000 ° C) is the heat source, which burns between the coated welding electrode and the workpiece. The arc decomposes the electrode coating into slag and shielding gas to protect the passing drop and the weld from atmosphere. The main difference for this welding [...]

Principal of Gas Metal Arc Welding

Principal of Gas Metal Arc Welding

The main difference between the tungsten arc welding process and the MIG process is indifference of the electrodes. Whereas the tungsten electrodes at the tungsten arc welding process are only arc producing electrodes (non depositing electrodes), the almost endless spooled wire electrodes are at gas metal arc welding arc producing electrodes and depositing filler material. [...]

Processes During Heating and Cooling

Processes During Heating and Cooling

As T = 0 K, the heat capacity approaches zero, thus, it is assumed that the atoms do not oscillate at their lattice points. By means of supplying heat, the atoms behave as oscillator and start to vibrate with certain frequencies around their lattice sites. With increasing temperature and therefore increasing oscillation of the atoms [...]

Pig Iron and Crude Steel Production

Pig Iron and Crude Steel Production

In nature iron never occurs as pure material but only as a compound. These are mainly iron-oxydes which are inter-spersed with mineralic constituents called the gangue. The mixture of iron-oxydes and gangue is called iron ore. The main task of metallurgical engineering is the seperation of the iron-oxydes from gangue and on the other hand, [...]

 Classification of the Thermal Cutting Processes

Classification of the Thermal Cutting Processes

Thermal cutting processes can be classified according to different aspects. According to the common physical processes, a distinction can be drawn between flame cutting, fusion cutting and sublimation cutting. The material is treated as follows: When flame cutting, it is mainly burned, and the combustion products are expelled by an oxygen jet of high kinetic [...]

Welding arc - properties, forming

Welding arc – properties, forming

Many important joining processes make use of the arc as a tool and energy source. The arc performs the penetrations and deposits the filler. Furthermore it supplies energy for physical and metallurgical processes which are important for welding. As glow discharge or real or artificial flash also the arc is a special kind of gas [...]

Overview of the Metal Welding Processes

Overview of the Metal Welding Processes

At first you see an overview of the different fusion welding processes. The list of pressure welding processes according to classification of the energy transfer medium which is used for welding is as follows: Schematic presentation of some pressure welding processes