关键词: 在线热处理, YL82B-QM, 高强钢绞线, 轨枕钢丝

Abstract: By adjusting the composition of the steelmaking process， reducing the V content from 0.09% to 0.005%， Cr content from 0.28% to 0.05%， Mn content from 0.85% to 0.70%. In the case of reduced alloy elements， Φ15 mm YL82B-QM high-strength steel strand produced by adjusting the soft reduction during continuous casting process， on-line heat treatment technology （spinning temperature 890-910 ℃， salt tank temperature 510-520 ℃）， the average tensile strength reached 1 227 MPa， shrinkage of across section of 39.3%， soxtization rate 98%， the same circle strength is within 40 MPa， crystal boundary carburizing and cardiac martensite level 1.0 or below. Compared with the traditional Cr， V alloying Φ15 mm YL82B-V air-cooled wire rod， the wire rod performance is better， reduces the amount of alloy composition， and does not require fan cooling， greatly reduces energy consumption， truly achieves green industrial production. The wire rod is used for the production of Φ10 mm 1 570 MPa grade sleeper steel wire. The customer has verified that the steel wire tensile strength， elongation， bending and other important indicators meet the standard requirements.

Key words: In-line Heat Treatment, YL82B-QM, High Strength Steel Strand, Sleeper Steel Wire