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According to the chemical composition of steel, it can be divided into two categories: carbon steel and alloy steel. Carbon steel is further divided into: ① low carbon steel, with a carbon content of less than 0.25%; ② medium carbon steel, with a carbon content of 0.25%~0.6%; ③ high carbon ste...Read more »
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Fillet welds are the most important form of welds in T-shaped joints, lap joints, and corner joints. They are widely used in steel structures, equipment racks, pipeline supports and hangers, and engineering machinery components. The quality of the weld depends on three key points: the weld toes...Read more »
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The primary function of welding shielding gases is to isolate the weld pool from the atmosphere, stabilize the arc, control penetration depth, and enhance overall weld quality. Conversely, selecting the wrong gas leads directly to defects such as porosity, cracking, embrittlement, and insuffici...Read more »
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Vertical welding with stick electrodes gives many welders trouble. The molten metal wants to drip downward, the puddle sags, and the bead ends up uneven. But vertical welding is not as hard as it seems once you understand two things: current control and manipulation rhythm. Let’s break it...Read more »
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Welding is the core processing technology in the fields of modern manufacturing, steel structures, pipes, sheet metal, auto repair, and special equipment. According to the physical nature of the welding process, it is mainly divided into three categories: fusion welding, pressure welding, and b...Read more »
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Shielded Metal Arc Welding (SMAW), commonly known as stick welding, is one of the most versatile and widely used welding processes. It’s the first process many welders learn because equipment is simple, portable, and relatively inexpensive. If you’re just starting out, here are the b...Read more »
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In multi-pass and multi-layer welding, temperature control between each bead and layer is crucial. This is the “interpass temperature” under discussion. Interpass temperature refers to the maximum or minimum temperature to which the previous layer or bead can reach before the next l...Read more »
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Commonly used stainless steel solid welding wires include AWS ER308, ER308L, ER309, ER309L, R316, ER316L and ER2209, etc., which are widely used in stainless steel welding, chemical industry, shipbuilding and bridge construction. The choice of stainless steel solid welding wire model must be ma...Read more »
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Important structures such as boilers and pressure vessels require safe penetration of joints, but due to limitations in structure size and shape, double-sided welding is sometimes impossible. A special operation method that can only create a single-sided groove is single-sided welding and double...Read more »
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1. Core principle: Why must we use argon? During the welding process, the metal is like red-hot iron at high temperatures. If it is not protected, it will immediately combine with the oxygen and nitrogen in the air. The result is that the weld will have pores and cracks, and the strength is sim...Read more »