To ensure the prerequisite of [Mn]+[Cr] controlled by0.5%-0.6%

the content of Mn is reduced from 0.50% to0.24%

and the content of Cr is increased from 0.021% to 0.32% in order to keep hardenability and obtain higher strength and toughness of C82D2Cr steel. The results show that

compared with C82D2 steel φ5.5 mm wire rod

the tensile strength of C82D2Cr steel φ5.5 mm wire rod is increased by 50 MPa

the reduction of area is increased by 4%

the lamellar spacing of sorbite is decreased by 9.8%

and the size of pearlite colony is decreased by 14.5%.C82D2Cr steel not only has obvious dislocation line at the interface between ferrite and cementite

but also increases dislocation line density

and increases dislocation cells in ferrite

which can significantly increase; deformation strengthening ability. The custom- er has verified that C82D2Cr steel rod can meet the production requirements of 2×0.30UT steel cord.