Development of 40Mn Hot Rolled Narrow Strip Steel
YU Yunxia
Abstract：In view of easy cracking of the billet, easy decarburization in heating process of the billet and other problems, the molten iron was pretreated for desulphurization. By appropriately reducing single furnace loading, adopting full protection casting, high temperature fast heating process, the quality of the billet and the properties after rolling were ensured. The product quality of 40Mn hot rolled narrow strip steel developed can conform to the Standard requirements. The finished product rate is 98.26%and the qualified rate is 99.91%. The strip delivery state hardness (HSB 10/3 000) is 187-195. The average depth of decarburized layer is 0.042 mm. The strip with high precision of shape size and good surface quality meet the Standard and the user’s requirements.
Keywords：hot rolled narrow strip steel40Mn steelhardnessdecarburization layer
Publication Date：2015-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 9-10,13 )