Stainless steel wire heat treatment

Stainless steel wire cold during heat treatment purposes and methods of treatment with other products are not identical. 1, solution treatment of austenitic stainless steel wire by solution treatment to soften, typically wire heated to about 950 to 1150 ° C holding time, and carbides of various alloying elements sufficiently uniformly dissolved in the austenite, and then Rapid quenching water cooling, carbon and other alloying elements too late to precipitate to obtain pure austenite, called solution treatment. There are three solution treatment effect. (1), so that the wire tissue and uniform composition, which is particularly important for the raw material, because the hot rolled wire rod rolling temperature of each stage and the cooling rate is not the same, resulting in tissue structure inconsistencies. Increased activity at high temperatures atoms, more uniform chemical composition, after rapid cooling to obtain a uniform intended tissue. (2), to eliminate work hardening, in order to facilitate continued cold. By solution treatment, contorted lattice recovery, elongation and broken grains re-crystallization within should do to eliminate wire pull out strength decreased, elongation rates. (3), to restore the inherent corrosion resistance of stainless steel. Due to cold causes carbide precipitation, lattice recovery, elongation and broken grains recrystallized, to eliminate the internal stress, the wire tensile strength decreases and the elongation increases. For steel, the three elements of the solution treatment temperature, holding time and cooling rate. 1) The solution temperature is mainly determined by the chemical composition. 2) holding time shall be determined by the amount of heat treatment furnaces and furnace installed. 3) the cooling rate has a great impact on the performance of stainless steel.