正在加载图片...
.802 北京科技大学学报 第29卷 但对屈强比要求较高的高级别管线钢中,不仅需通 使脆性转变温度进一步降低, 过轧制工艺在钢中形成一定密度的位错,还需主要 控制位错的密度和分布,胞状结构的位错有利于提 参考文献 高管线钢的综合力学性能 [1】王祖滨,东涛.低合金高强度钢.北京:原子能出版社,1996:26 [2]雍歧龙微合金钢一物理和力学冶金·北京:机械工业出版社, 4 结论 1989,135 [3]Rak I.Gliha V,Kocak M.Weldability and toughness assessment (1)综合采用固溶强化、位错强化、析出强化、 of Ti-micro alloyed offshore steel.Metall Mater Trans A,1997. 细晶强化可得到力学性能优越的X80管线钢 28A(1):199 (2)通过大幅度降低碳含量,选择Mn、Mo、Nb、 [4]Motohashi H.Hagiwara N.Masuda T.Tensile properties and Ti等微合金元素的最佳匹配,在适当的轧制工艺下 microstructure of weld metal of X80 steel.Mater Sci Forum. 2003,426/432,4013 可生产针状铁素体为基体的X80;具有细小板条铁 [5]武会宾,尚成嘉超细化低碳贝氏体钢的回火及力学性能·金属 素体晶粒和M/A第二相的管线钢的力学性能 学报,2004,40(11):1143 更佳, [6]哈宽富,金属力学性质的微观理论,北京:机械工亚出版社 (3)细小而弥散的析出相,有利于提高X80的 1989,278 强度,同时不牺牲其韧性, [7]庄传晶,冯耀荣,霍春勇·国内X80级管线钢的发展及今后的 研究方向-焊管,2005,28(2):10 (4)大量的位错滑移、纠结,并形成位错胞状结 [8]薛小怀,杨淑芳,吴鲁海,等,X80管线钢的研究进展.上海金 构,可以使X80管线钢获得较高的强度和韧性,并 属,2004,26(2):45 Effect of structure pattern on the performance of X80 pipeline steel REN Yi,ZHA NG Shuai,WANG Shuang Technical Center of Anshan Iron 8.Steel Co.Ltd.,Anshan 114001.China ABSTRACI The microstructure,dislocation and precipitation phases of X80 pipeline steel produced with dif- ferent processes were analyzed by optical microscope and transmission electron microscope contrastively,and the influence of structure pattern on the performance of X80 pipeline steel was studied combining with tests of me- chanic properties.The result shows that the effects of acicular ferrite grain size,precipitate phrase distribution, dislocation density and form on the material strength,toughness and brittle transmission temperatures were dis- tinct,and solid solution strengthening,fine crystal strengthening,dislocation strengthening and precipitation strengthening were the strengthening ways of X80 pipeline steel. KEY WORDS pipeline steel;acicular ferrite;dislocation:precipitated phase;toughness但对屈强比要求较高的高级别管线钢中‚不仅需通 过轧制工艺在钢中形成一定密度的位错‚还需主要 控制位错的密度和分布‚胞状结构的位错有利于提 高管线钢的综合力学性能. 4 结论 (1) 综合采用固溶强化、位错强化、析出强化、 细晶强化可得到力学性能优越的 X80管线钢. (2) 通过大幅度降低碳含量‚选择 Mn、Mo、Nb、 Ti 等微合金元素的最佳匹配‚在适当的轧制工艺下 可生产针状铁素体为基体的 X80;具有细小板条铁 素体晶粒和 M/A 第二相的管线钢的力学性能 更佳. (3) 细小而弥散的析出相‚有利于提高 X80的 强度‚同时不牺牲其韧性. (4) 大量的位错滑移、纠结‚并形成位错胞状结 构‚可以使 X80管线钢获得较高的强度和韧性‚并 使脆性转变温度进一步降低. 参 考 文 献 [1] 王祖滨‚东涛.低合金高强度钢.北京:原子能出版社‚1996:26 [2] 雍岐龙.微合金钢—物理和力学冶金.北京:机械工业出版社‚ 1989:135 [3] Rak I‚Gliha V‚Kocak M.Weldability and toughness assessment of T-i micro alloyed offshore steel.Metall Mater Trans A‚1997‚ 28A(1):199 [4] Motohashi H‚Hagiwara N‚Masuda T.Tensile properties and microstructure of weld metal of X80 steel.Mater Sci Forum‚ 2003‚426/432:4013 [5] 武会宾‚尚成嘉.超细化低碳贝氏体钢的回火及力学性能.金属 学报‚2004‚40(11):1143 [6] 哈宽富.金属力学性质的微观理论.北京:机械工业出版社‚ 1989:278 [7] 庄传晶‚冯耀荣‚霍春勇.国内 X80级管线钢的发展及今后的 研究方向.焊管‚2005‚28(2):10 [8] 薛小怀‚杨淑芳‚吴鲁海‚等.X80管线钢的研究进展.上海金 属‚2004‚26(2):45 Effect of structure pattern on the performance of X80pipeline steel REN Y i‚ZHA NG Shuai‚WA NG Shuang Technical Center of Anshan Iron & Steel Co.Ltd.‚Anshan114001‚China ABSTRACT The microstructure‚dislocation and precipitation phases of X80pipeline steel produced with dif￾ferent processes were analyzed by optical microscope and transmission electron microscope contrastively‚and the influence of structure pattern on the performance of X80pipeline steel was studied combining with tests of me￾chanic properties.The result shows that the effects of acicular ferrite grain size‚precipitate phrase distribution‚ dislocation density and form on the material strength‚toughness and brittle transmission temperatures were dis￾tinct‚and solid solution strengthening‚fine crystal strengthening‚dislocation strengthening and precipitation strengthening were the strengthening ways of X80pipeline steel. KEY WORDS pipeline steel;acicular ferrite;dislocation;precipitated phase;toughness ·802· 北 京 科 技 大 学 学 报 第29卷
<<向上翻页
©2008-现在 cucdc.com 高等教育资讯网 版权所有