To prevent the occurrence of delamination that hinders the strength increase of steel wire for tire cord, plastic anisotropy must be prevented from developing in the steel wire. It was found to be effective to this end to strengthen the patented wire and enhance work hardening in the drawing stage. A hypereutectoid chromium steel was developed according to these guideprinciples, and tire cord wire with a tensile strength of 3,600 MPa was successfully made from the new steel and put to practical use.
展开▼
