屈服强度700MPa以上级船舶用钢的试制开发  

Development of Shipbuilding Section with More Than 700 MPa Yield Strength

作　　者：裴建华 毕永杰 

机构地区：[1]山东钢铁集团有限公司,山东济南250101

出　　处：《山东冶金》2016年第2期16-17,共2页Shandong Metallurgy

摘　　要：通过成分设计、冶炼和轧制工艺优化,利用50 kg真空感应炉冶炼试制了高级别船舶用钢,并分析了不同成分及不同回火温度对船舶用钢力学性能的影响,同时利用扫描电镜对冲击断口进行分析。结果表明,提高回火温度,试验钢强度下降,塑性提高;提高Ni、Mo含量,其强度和塑性均提高,脆性转变温度从-70℃提到到-90℃,钢的屈服强度均在800 MPa以上,抗拉强度870 MPa以上,伸长率达到17%以上,-80℃冲击功80 J以上。Based on the chemical composition design, optimization of smelting and rolling technology, 50 kg vaeuum induetim furuaee was used to smelt test fur the high grade hull-structure steel, and the affection about mechanical properties of ship steel at different compositions and tempering temperatures were analyzed. The analysis of impact fracture surface was obtained by scanning electron microscope （SEM）. The results show that with increasing tempering temperature, the strength and plasticity inereased. By adjusted the element content of Ni, Mo, its strength and plasticity are improved. The brittle transition temperature is from -70 ℃ to - 90℃, the steel yield strength are above 800 MPa, tensile strength is more than 870 MPa, the elongation reached more than 17%, impact absorbed energy is more than 80 J at -80℃.

关 键 词：船舶用钢 合金强化 回火温度 脆性转变温度 

分 类 号：TF762.3[冶金工程—钢铁冶金] TG142.1[一般工业技术—材料科学与工程]