Non-Annealing Steel Having Ferrite Formed by Strain Induced Dynamic Transformation and Method for Manufacturing the Steel

摘要

The present invention is used as a soft material such as auto parts, general machinery and construction and civil engineering machinery parts It relates to a steel material and a method of manufacturing the same, an organic plastic softening dynamic heat treatment in the heat treatment process can be omitted, such as the configuration softening heat treatment such as by creating a fine ferrite by transformation omitted to provide a steel material and to a method of manufacturing the same, and an object thereof is It is in. ; the present invention contains carbon (C), and Si of 0.5 to 1.5% by weight 0.2% by weight or more, the tissue that is composed of ferrite and cementite and the ferrite is fired organic dynamic transformation made of ferrite generated by the transformation, and static generated by the ferrite and cementite is related to the softening heat treatment is omitted and a manufacturing method for steel characterized in that the distribution between the dynamic ferrite. ; According to the present invention, it is possible to manufacture a soft steel capable of cold working while omitting the softening heat treatment step, in which case using the steel to produce any of the products in the cold working, heat treatment cost reduction and productivity improvement, etc. can bring.