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≥1 000 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。
The chemical composition design, steel purity improving, the heat treatment process and precipitates analysis of the The mechanical engineering of TQ960 E microalloyed high strentth low carbon steel were studied. The results indicate that for the 12 mm hot-rolled plate of steel TQ960 E(/% :0. 18 C, 0. 23 Si, 1.50 Mn, 0. 010 P, 0. 003 S, 0. 06 Ti,0.002 B,0.006 3 N, 0.001 30) the optimum quenching temperature is 860~900 ℃ and the tempering temperature is300 ~ 350℃. The steel plates were developed and prduced by industrialization,with the yield strength no less than 1 000 MPa, the tensile strength above 1 100 MPa, the elongation above 10% or higher and the Charpy impact energy at-40℃no less than 34 J. The steel can meet domestic standard and application requirements of high strength steel for engineering machinery.
引文
[1] Lutz Meyer.钛在低碳钢中作为一种强化元素和控制硫化物元素[J].徐新华译.宝钢情报,1989(s):149-158.
[2]毛新平.薄板坯连铸连轧微合金化技术[M].北京:冶金工业出版社,2008:69,100.
[3]魏向东,关勇,李劲羽,等.改善钢板冷加工性能的微合金化工艺研究[J].钢铁,2002,37(1):28-38.
[4]万兰风,冷祥贵.铌钛微合金化汽车大梁用热轧板带BM510L的开发[J].汽车工艺与材料,2005(4):12-15.
[5]毛新平,陈学文,李烈军,等.EAF-LF-CSP流程Ti微合金化钢炼钢工艺研究[J].河南冶金,2006,14(S1):96-99.