焊接 is critical to our country’s aging infrastructure as well as new construction, and knowledgeable welders will be needed in the field. Welders work in a variety of industries, 包括建设, 造船, 制造业, 和航空航天.
There are more than 30 types of welding processes and techniques, but the field relies on four primary arc welding techniques. Arc welding uses intense heat to fuse metals, and our 焊接培训计划 provides instruction in all four. 有了这样的背景, you can enter the field as an entry-level industrial welder, 焊接学徒, 或检查焊工.
Gas Metal Arc 焊接 (GMAW; also known as MIG)
- The most common of all the welding processes, gas metal arc welding is also called Metal Inert Gas or MIG welding. It’s one of the easier techniques to learn and uses a hand-held torch containing an electrode wire for welding clean metals like stainless steel, 铝, 碳钢. The torch contains shielding gas and requires a constant direct power source, so it’s not portable.
- MIG welding is the most common technique used in the 制造业 industry but also is used in construction, 汽车, 管道, 海上维修, 和制造.
药芯弧焊(FCAW)
- Flux cored arc welding is similar to MIG welding as a technique but unlike MIG, it doesn’t require a gas supply, 所以它是便携的. The FCAW welding gun relies on a wire electrode rather than shielding gas.
- 因为它不用汽油, FCAW is useful for working outdoors on constructions sites and doing work or general repairs on thicker or rusty metals (MIG welding requires very clean metal). The process produces heavy fumes and requires ventilation.
Shielded Metal Arc 焊接 (SMAW)
- Commonly known as “stick welding,” shielded metal arc welding is used for heavy-duty work involving iron and steel because it can weld thick metals, and it works well on rusty or dirty metals. The process relies on an electric current that flows through a rod.
- Stick welding is considered to be the easiest technique to learn, 就像药芯焊接一样, it doesn’t use shielding gas 所以它是便携的 and well suited for outdoor locations. The downside of this process is the welds tend to be less durable.
Gas Tungsten Arc 焊接 (GTAW; also known as TIG)
- Also known as Tungsten Inert Gas, gas tungsten arc welding is considered the most challenging to learn of these four processes because it takes the most time and requires attention to detail and a steady hand. You control the current (and heat) with a foot pedal while holding the welding gun in one hand and a consumable filler rod in the other.
- TIG produces high-precision, durable welds, and is used for thin metal. The industries that rely on the superior appearance of TIG welding include aerospace, 自行车制造商, 汽车工业, 以及管道行业.
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