手工电弧焊弧焊电源的类型及其适用范围
Electric arc welding (EAW) is one of the oldest, most versatile and most widely used of all welding processes. It is particularly important in the structural steel and stationary boiler markets, and it constitutes nearly 75% of all welding procedures. EAW uses an electric current to form an arc between a consumable metal electrode and the workpiece, which supplies the molten filler material and forms a weld. This process can be used to join a variety of materials, including steel alloys, superalloys, aluminum alloys and stainless steels.
There are three main types of arc welding power sources: resistive, capacitive and inductive. Selecting the correct power source is essential in order to obtain a durable and reliable weld.
Resistive arc welding power sources are the most commonly used and widely available type of arc welding power sources. They are characterized by a consistent output current (amperage) regardless of the arc length or voltage. They are well suited for welding high-strength metals, such as high-carbon steel, for all-position welding of low- to medium-alloy steels, and for short arc welding.
Capacitive arc welding power sources are less commonly used than resistive arc welding power sources and are characterized by a non-constant output current. This type of power source is better suited for welding metals with high resistivity, such as stainless steel, due to its higher arc stability.
Inductive arc welding power sources are the least commonly used type of arc welding power sources. These are typically used for welding very thick metals and metals with high electrical conductivity. These power sources use a current pulse-modulated method to maintain a constant output power regardless of arc length, and they are well suited to pulsed welding because they can produce high voltage peaks.
Resistive arc welding power sources are generally the most economical choice and are best suited to a variety of applications. They are ideal for welding low- to medium-alloy steel, aluminum alloys, and for short arc welding. Capacitive arc welding power sources are more expensive but are the best choice for welding high resistivity metals, such as stainless steels. Inductive arc welding power sources are the most expensive type but are the best choice for welding thick steel and metals with high electrical conductivity.
