Abstract: The chemical composition design, steel purity improving, the heat treatment process and precipitates analysis of the The mechanical engineering of TQ960E microalloyed high strentth low carbon steel were studied. The results indicate that for the 12 mm hot-rolled plate of steel TQ960E (/% ：0. 18C, 0. 23Si, 1.50Mn, 0. 010P, 0. 003S, 0.06Ti, 0.002B, 0.006 3N, 0. 001 30) the optimum quenching temperature is 860 〜900 °C. and the tempering temperature is 300 〜350°C.The steel plates were developed and produced by industrialization, with the yield strength no less than 1 000 MPa, the tensile strength above 100 MPa, the elongation above 10% or higher and the Charpy impact energy at -40°C no less than 34 J. The steel can meet domestic standard and application requirements of high strength steel for engineering machinery.

摘要： 研究了工程机械用TQ960E微合金化低碳高强度钢的化学成分设计、钢质纯净度提升、热处理工艺试验、析出物分析等,结果表明,TQ960E钢12 mm热轧板(/%:0. 18C,0.23Si,1.50Mn,0.010P,0.003S,0.06Ti,0.002B,0.006 3N,0.001 30)最佳淬火温度860～900℃,回火温度300～350℃,工业化试制出的钢板屈服强度≥1000 MPa,抗拉强度≥1 100 MPa,延伸率≥10%,-40℃ 冲击功≥34 J,满足国内工程机械用超高强钢的标准及应用要求。