Welding of rolled metal, steel and alloys
Are you interested in welding metal, various metal products, steels and alloys from the supplier company AvecGlob? Here you will find interesting information on this topic /
Weldability of steels
Weldability of steels depends on the percentage of carbon in them. Low-carbon steels are easily welded with any welding technology-arc welding, friction welding, resistance welding, gas or electric. For the welding of such steels of increased hardness, special coated electrodes are used. These steels include low-manganese steels, low-power nickel steels, low-alloy chrome steels, molybdenum steels, chromium-molybdenum steels and nickel-chromium-molybdenum steels. If the percentage of carbon exceeds 0.15%, then preheating to 150… 250 0 С.
The coating of the electrode must correspond to the mechanical properties and composition of the base metal. This is especially true for profile rolled products — pipes, angles, channels, etc.
Mild steel is welded worse, and requires the use of coated electrodes with a low hydrogen content. The preheating temperature is in the range 200… 260 0 С. These steels are recommended to be cooled slowly to avoid occurrence of thermal stresses.
High-carbon steels are poorly welded. Preheating from 300 to 350 0 C and mandatory annealing after welding are required.
Supplier — AvekGlob Company — offers at affordable prices from the manufacturer various metals and alloys, in the quantity and assortment that are required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Welding of alloy steels
Steel with a low content of nickel can be welded without preheating, but with subsequent annealing. For low-manganese steels, heating up to 150… 180 0 С, and subsequent annealing are necessary. Low-alloyed chromium steels require preheating to 400 ° C, preferably using arc welding under a flux layer. When using the gas welding process, the electrode should be selected in accordance with the chemical composition of the base metal, and the welding itself should be conducted in a stream of shielding gas. Preheating is mandatory.
When low-alloy, high-strength steels are welded to ordinary steels, the electrode should be selected in accordance with steel of lower strength.
Supplier — AvekGlob Company — offers at affordable prices from the manufacturer various metals and alloys, in the quantity and assortment that are required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Features of welding non-ferrous metals and alloys
For welded alloys, the composition of the welding electrode is chosen more carefully. When selecting a welding alloy, several factors, such as welded metals or alloys, the type of welding method used and the applicable standards or recommendations, should be considered. The basic specifications are those standards that are specified in the parts drawings, assembly plan or in the design document.
The base metal refers to the composition of the workpiece to be welded. As a rule, welding welded alloys are similar in composition to the base alloys or alloys of the parts to be joined. Welded alloys or alloys of surfacing form a melt with base alloys of parts that are joined together to merge the parts together. The selected alloy filler should not form any brittle compounds when fusing with the base alloy parts.
In some cases, two different alloys are incompatible due to the melting point, exothermic heat of mixing, insolubility, brittle phase formation and corrosion factors. In these cases, a bimetallic or trimetallic transition compound is used for welding. In other cases, welding should be stopped because of the impossibility of bonding or because of the release of toxic vapors from alloying additives. In these cases, instead of welding, the suitability of soldering, soldering or bonding should be checked.
Supplier — AvekGlob company — offers to purchase various metals and alloys in any quantity and range of sizes. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.