a)Filler metal:
-The material which is added in the weld pool to assist in filling the gap (or grooves).It forms an integrated part of the weld.
-Filler metal is usually available in stick or in a rod form.This rod is called filler metal.
-Filler rod have the same or nearly the same chemical composition as the base metal.
-Welding filler rods are available in a variety of composition(for welding different materials) and sizes.
Some of them are given in table below.
b)Fluxes:-
-During welding if the metal is heated/melted in air,
oxygen from the air combines with the metal to form oxides
which results in poor quality,low strength welds or in some cases may even make welding impossible. In order to avoid this difficulty, a flux is employed during welding.
-A flux is material used to prevent dissolve or facilitate
removed of oxides and other undesirable substance. A flux prevents the oxidation of molten metal.
-A flux is fusible and non-metallic
-During welding flux chemically reacts with the oxides and a slag is formed that floats and covers the top of the molten puddle of metal and thus helps keep out atmospheric oxygen and other gases.
-Fluxes are available as powders, pastes or liquids.
-Flux may be used either by applying directly on to the surface of the base metal to be welded or by dipping the heated end of the filler rod in it. The flux sticks to the filler rod end.
-After welding the slag from over the welded joint can be
removed by chipping,filing, or grinding.
-No flux is used in the gas welding of Steel
-Fluxes are used in the gas welding of cast iron,stainless steel,and most non-ferrous metals other than lead,zinc and some precious metals.
-The material which is added in the weld pool to assist in filling the gap (or grooves).It forms an integrated part of the weld.
-Filler metal is usually available in stick or in a rod form.This rod is called filler metal.
-Filler rod have the same or nearly the same chemical composition as the base metal.
-Welding filler rods are available in a variety of composition(for welding different materials) and sizes.
Some of them are given in table below.
b)Fluxes:-
-During welding if the metal is heated/melted in air,
oxygen from the air combines with the metal to form oxides
which results in poor quality,low strength welds or in some cases may even make welding impossible. In order to avoid this difficulty, a flux is employed during welding.
-A flux is material used to prevent dissolve or facilitate
removed of oxides and other undesirable substance. A flux prevents the oxidation of molten metal.
-A flux is fusible and non-metallic
-During welding flux chemically reacts with the oxides and a slag is formed that floats and covers the top of the molten puddle of metal and thus helps keep out atmospheric oxygen and other gases.
-Fluxes are available as powders, pastes or liquids.
-Flux may be used either by applying directly on to the surface of the base metal to be welded or by dipping the heated end of the filler rod in it. The flux sticks to the filler rod end.
-After welding the slag from over the welded joint can be
removed by chipping,filing, or grinding.
-No flux is used in the gas welding of Steel
-Fluxes are used in the gas welding of cast iron,stainless steel,and most non-ferrous metals other than lead,zinc and some precious metals.
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