M4 M16 Carbon steel Weld STUD Bolt with Nut washer Class4.8 Grade 8.8 Black plating

M4 M16 Carbon steel Weld STUD Bolt with Nut washer Class4.8 Grade 8.8 Black plating
 
Product Description:

Stud welding is the stud end and plate (or pipe fittings) surface contact, electric arc, to be melted on the contact surface, give the stud a certain pressure to complete the welding method. Arc stud welding with cylindrical head studs are suitable for high-rise steel structure buildings, industrial plant buildings, highways, railways, bridges, pylons, automobiles, energy, transport facilities buildings, airports, stations, power stations, pipeline supports, cranes and other steel structures.

Stud welding is a method of welding metal studs or other fasteners to a workpiece. There are various methods to achieve stud welding, such as: arc welding stud welding, energy storage stud welding, resistance welding, projection welding and so on. The corresponding welding machine is also different, respectively, for the arc stud welding machine, energy storage stud welding machine, resistance welding machine, convex welding machine. 

Stud welder in China has a variety of informal terminology, such as seed welder, plant welder, seed nail machine, plant nail machine, screw welder, screw welder, and so on, are referred to the stud welder.

Capacitor discharge stud welder adopts large capacity capacitor as the source of welding energy, and precisely controls the discharge time by SCR, which melts the tip of the stud quickly by instantaneous low voltage and strong current, and makes the stud and the working surface gap merge quickly, and welds the stud firmly on the working surface, and the whole process lasts about 1-10ms.

Applications

According to the mass percentage of carbon:

Low carbon steel (C: ≤ 0.25%), also known as soft steel, low carbon steel is easy to accept a variety of processing such as forging, welding and cutting, commonly used in the manufacture of chains, rivets, bolts, shafts, etc..

Medium carbon steel (C: 0.25% <C ≤ 0.6%) has a variety of products such as sedentary steel, semi-sedentary steel, boiling steel. In addition to carbon can also contain a small amount of manganese (0.70% ~ 1.20%). According to product quality is divided into ordinary carbon structural steel and high quality carbon structural steel. Good hot working and cutting performance, poor welding performance. Strength and hardness are higher than low carbon steel, while plasticity and toughness are lower than low carbon steel. Can not be heat-treated, direct use of hot-rolled material, cold-drawn material, can also be used after heat treatment. Quenched and tempered medium carbon steel has good overall mechanical properties. Can achieve the highest hardness of about HB538, tensile strength σb for 600 ~ 1100MPa. so in the medium strength level of various uses, medium carbon steel has been the most widely used, in addition to as a building material, but also a large number of used in the manufacture of a variety of mechanical parts.

High carbon steel (C: > 0.6%) often called tool steel, carbon content from more than 0.60% to 1.70%, can be hardened and tempered. Hammers, crowbars, etc. are manufactured from steel with a carbon content of 0.75%; cutting tools such as drills, taps, reamers, etc. are manufactured from steel with a carbon content of 0.90% to 1.00%.

The higher the carbon content, the greater the hardness and strength, but the plasticity decreases.

 
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