金属学报  1997, Vol. 33 Issue (5): 485-491

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700-1000℃间含Nb钢铸坯的延塑性降低与Nb(C,N)析出

王新华;昌波;李景捷;张立;叶锦渭

北京科技大学;北京;100083;北京科技大学;北京;100083;北京科技大学;北京;100083;宝山钢铁公司;上海;201900;宝山钢铁公司;上海;201900

DUCTILITY LOSS AND Nb(C,N) PRECIPITATION IN Nb-CONTAINING STEEL SLAB IN THE TEMPERATURE RANGE FROM 700 TO 1000℃

WANG Xinhua;CHANG Bo;LI Jingjie (University of Science and Technology Beijing; Beijing 100083); ZHANG Li;YE Jinwei (Baoshan Iron and Steel Co.; Shanghai 201900)

王新华;昌波;李景捷;张立;叶锦渭. 700-1000℃间含Nb钢铸坯的延塑性降低与Nb(C,N)析出[J]. 金属学报, 1997, 33(5): 485-491.
, , , , . DUCTILITY LOSS AND Nb(C,N) PRECIPITATION IN Nb-CONTAINING STEEL SLAB IN THE TEMPERATURE RANGE FROM 700 TO 1000℃[J]. Acta Metall Sin, 1997, 33(5): 485-491.

摘要 参考文献 相关文章 Metrics 全文: PDF(2192 KB)   摘要: 在1×10-3／s应变速率下对含Nb钢连铸坯试样的高温延塑性进行了测定.在温度降至1100℃以下的变形试样中Nb（C，N）开始由γ晶中析出，1000-950℃之间析出的Nb（C，N）较粗大并在钢中零散分布;温度降至900℃左右时，大量微细的Nb（C，N）在γ晶界和晶粒内析出，尺寸平均为5-8nm，间距在30nm左右，造成了γ相区低温域合Nb钢延塑性的急剧减少;温度降至800℃时，先共折铁素体开始在γ晶界析出，钢的延塑性继续降低.由于含Nb钢试样共折转变的推迟，与不含Nb钢相比，其第Ⅲ脆性温度域向低温延伸. 关键词 ： 含铌钢,  连铸坯,  热塑性,  Nb（C，N）     Abstract：Hot ductility of the continuously casted Nb-containing steel slab was measured under the strain rate of 1×10-3 /s. It was found that in the fractured specimens,Nb(C,N) precipitation took place when temperature decreased to below 1100℃. The Nb(C,N) particles precipitated in the temperature range from 1000 to 950℃ were coarse and rondomly distributed in the specimens. When the temperature was lowered to 900℃, the precipitation content of Nb(C,N) reached maximum and fine Nb(C,N) precipitates were found both along γ grain boundaries and inside the grains with mean particle size of 5-8 nm and interparticle spacing of about 30 nm. As the result of Nb(C,N) precipitation, the hot ductility of the steel was significantly reduced in the lower temperature region of γ single phase. As the temperature decreased to below 800℃, film-like proeutectoid ferrites formed aIong the γ grain boundaries that further reduced the steel ductility. The eutectoid transformation of the Nb-containing steel was delayed compared to the steel without Nb. This leads to the extension of the low ductility of the steel to the lower temperature. Key words： Nb-containing steel    continuous cast slab    hot ductility    Nb(C    N) 收稿日期: 1997-05-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 王新华 昌波 李景捷 张立 叶锦渭 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1997/V33/I5/485 1 Turkdogan E T.Steelmaking ConfProc,1987;70:399 2 Maehara Y,Yotsumoto K,Tomono H,Nagamichi T and Ohmori Y.Mater Sci Technol,1990;6:793 3 Mintz B,Yue S,Jonas J J.Int Mater Rey,1991:36:187 4 马翔.物化检验,1985;4:215 5 Weiss I,Jonas J J.Metall Trans,1979;17A:831 [1] 郭东伟, 郭坤辉, 张福利, 张飞, 曹江海, 侯自兵. 基于二次枝晶间距变化特征的连铸方坯CET位置判断新方法[J]. 金属学报, 2022, 58(6): 827-836. [2] 邓亚辉, 杨银辉, 蒲超博, 倪珂, 潘晓宇. Mn对23%Cr节Ni型双相不锈钢高温拉伸行为的影响[J]. 金属学报, 2020, 56(7): 949-959. [3] 陈雨来, 张泰然, 王一德, 李静媛. O, N和Ni含量对0Cr25Ni7Mo4N双相不锈钢热轧塑性的影响*[J]. 金属学报, 2014, 50(8): 905-912. [4] 潘晓林 汪波 孙文儒 涂赣峰 郭守仁 胡壮麒. 均匀化处理对GH742合金热变形行为的影响[J]. 金属学报, 2012, 48(11): 1403-1408. [5] 金小礼 雷作胜 于湛 张浩斌 邓康 任忠鸣. Ar气泡在连铸坯固/液界面处运动行为的物理模拟研究[J]. 金属学报, 2011, 47(6): 763-768. [6] 张玲; 薛春霞; 杨王玥; 孙祖庆 . 粗晶奥氏体HTP钢中形变诱导析出的定量研究[J]. 金属学报, 2007, 43(8): 791-796 . [7] 韩志强; 蔡开科 . 连铸坯中微观偏析的模型研究[J]. 金属学报, 2000, 36(8): 869-873 . [8] 韦东滨; 韩静涛 . 热塑性变形条件下钢内部裂纹愈合的实验研究[J]. 金属学报, 2000, 36(6): 622-625 . Viewed Full text Abstract Cited   Shared      Discussed