In the open furnace annealing
Are you interested in the features of annealing metals, steels and alloys in open kilns from the supplier company AvecGlob? Here you will find interesting information on this topic /
The essence of the process
Annealing in open furnaces consists in heating the steel to temperatures slightly above the critical temperature (723 ° C), followed by slow cooling. When fully annealed, the steel is heated 30−50 ° C above the critical temperature of the steel, maintains this temperature for a certain period of time, and then allows the material to cool slowly inside the furnace. This annealing is subjected to heavy metal, forgings and castings from medium- and high-carbon steels.
Low-temperature annealing in open furnaces is subjected to low-carbon cold-rolling steels. The material is heated to a temperature just below the lower critical temperature, which increases the ductility and reduces the hardness of the steel.
Large castings or welded structures, as a rule, have internal stresses, caused mainly by their uneven cooling. These internal stresses cause brittleness, which can lead to a sudden destruction of the material during its subsequent processing.
Such annealing includes heating the preforms to about 650 ° C, holding at this temperature, and then slowly cooling /
Spheroidizing annealing is a process for high-carbon and alloyed steels in order to improve their machinability. This improves the microstructure of the steel structure.
In open furnaces, it is also possible to perform isothermal annealing-heating the steel to temperatures somewhat higher than the critical ones, in order to form an austenitic structure.
Urgency of application
The annealing processes in open furnaces are used, if necessary, to reduce the capital costs for the construction and operation of heating equipment. In this case, the usual heating of the metal in the atmosphere, which is present inside the furnace, occurs. The technology of this annealing is used for small volumes of production, as well as for stainless steels and alloys.
Supplier — AvekGlob Company — offers at reasonable prices from the manufacturer various metals and alloys that are annealed in open furnaces, in the quantity and assortment required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer
Benefits
The main advantages of the annealing process in open furnaces are:
Easy control of the oven;
Cheapness of construction of furnaces;
The possibility of using for heat treatment of stainless steels and some non-ferrous alloys;
Reducing the complexity and cost of the operation.
Open annealing furnaces are usually used in small workshops and workshops. They are compact and easy to operate. Restriction — the need for subsequent cleaning of products from scale. In low-carbon steels annealing in open furnaces can cause carbon burn-up, which worsens the quality of steel.
Supplier — AvekGlob Company — offers to purchase various metals and alloys that are annealed in open furnaces, in any quantity and in a 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.