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2017-10-28 18:59
Welding flux is used to protect the weld area from contamination.  The flux forms a protective layer over the surface.  In certain cases, it is left as a residue over the weld area… Read More
2017-10-28 18:58
Shielded metal arc welding is one of most popular methods of welding.  Shielded metal arc is simpler than other forms of welding.  It requires an welding transformer kit and an ele… Read More
2017-10-28 18:58
Welding flux is a substance used during the welding process to shield the weld area from atmospheric contamination.  In metal arc welding, the flux is part of the welding rods. Whe… Read More
2017-10-28 18:57
Porosity in welding is the formation of air pockets or bubbles in the weld area.  Porosity makes the weld weak and can cause failure of the weld area. Some of the causes of porosit… Read More
2017-10-28 18:56
Shielding gases are gases used in gas arc welding.  Shielding gases serve to insulate the weld are from gases such as oxygen and water vapour.  This is necessary to prevent oxidati… Read More
2017-10-27 10:45
Hi Speed steels are steels which have high hardness even at high temperatures.  They also have good wear resistance. These steels have molybdenum, vanadium, chromium and tunsten as thei… Read More
2017-10-27 10:45
The Rockwell scale is a scale to measure hardness.  The scale is based on the depth of the indentation produced on a material.  The test works by using an indentor to makes an inde… Read More
2017-10-27 10:42
Quenching is process of strengthening and hardening steels and alloys.  Quenching is the quick cooling of a hot metal, such that the phase transformation do not occur. The hardness is i… Read More
2017-10-27 10:41
Tempering is a heat treatment used to reduce the hardness of a metal and to increase its toughness and ductility. The internal stresses in the material are relieved during the process. … Read More
2017-10-27 10:39
Galvanizing is the process of applying a coat of zinc on to a steel surface.  Galvanizing protects the steel from corrosion.  Galvanizing is a very popular method of protection.&nb&hell…Read More

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