Performance Study of Copper- bearing High Strength Ship-Hull Steel

摘要：

The variation in microstructures and the mechanical properties of a Copper-bearing high strength ship-hull steel at different aging temperature was studied. The peak strength was obtained at the aging temperature of 450 ℃, which was attribute to the plentiful Cu precipitates and a bit of Nb(C,N). In the over-aged condition, both the partial recovery of matrix and the coarsening of Cu particles (10-60 nm) caused the loss of the yield strength (YS) and the improvement of toughness. The increase of the ultimate tensile strength (UTS) at aging temperature above 660℃ due to the formation of alloy-rich island structure transformed from the austenite phase upon cooling, and complied with the mixture law. The copper-bearing ship steel can exhibit an excellent combination of high strength and toughness while aging at 660℃ for 2 hours (UTS-818 MPa, YS-745 MPa, Akv-161 J at -40℃).

关键词： Copper-bearing Aging HSLA Ship-hull steel

作者: LUO Xiao-bing YANG Cai-fu SU Hang CHAI Feng

作者单位: Central Iron and Steel ResearchInstitute, Institute for structural materials, Beijing 100081, China

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 593-597

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）