| 高韧性厚规格X70管线钢的研制与应用 |
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| 引用本文： | 邱双全,陈勇,张爱梅,吾塔,张建新.高韧性厚规格X70管线钢的研制与应用[J].新疆钢铁,2010(3):1-4. |
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| 作者姓名： | 邱双全 陈勇 张爱梅 吾塔 张建新 |
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| 作者单位： | 宝钢集团八钢公司制造管理部; |
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| 摘 要： | 文章介绍了八钢公司进行X70管线研发的生产工艺路线,采用了三种成分设计(中C-Nb-V-Cr、低C-Nb-V-Cr-Mo和低C-Nb-Ni-Cu-Cr),热轧采用低温轧制和低温卷曲并精确控制出钢温度、粗轧反馈温度和中间坯厚度。三种成分的强度、韧性等指标有如下差异:无论何种成分设计均能得到合格的强度指标和CVN指标,明显差异在于中C-Nb-V-Cr成分DWTT指标在0℃条件下SA%比例不足50%,低C-Nb-V-Cr-Mo和低C-Nb-Ni-Cu-Cr在-30℃条件下SA%仍表现较好的指标,组织进行分析认为:中C-Nb-V-Cr-Mo成分设计中出现严重的平行的偏析带和粗大的板条贝氏体是造成该方案韧性指标不合格的主要原因,低C成分设计可得到针状铁素体+少量贝氏体,M-A组元呈弥散分布,并有效降低铸坯带状偏析,可使材料获得良好的强韧性。
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| 关 键 词： | 管线钢 设计 强度 韧性 组织 |
Research and Application on High Toughness and Heavy Gauge Pipeline Steel X70 |
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| QIU Shuang-quan,CHEN Yong,ZHANG Ai-mei,WU Ta,ZHANG Jiang-xin.Research and Application on High Toughness and Heavy Gauge Pipeline Steel X70[J].Xinjiang Iron and Steel,2010(3):1-4. |
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| Authors: | QIU Shuang-quan CHEN Yong ZHANG Ai-mei WU Ta ZHANG Jiang-xin |
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| Affiliation: | QIU Shuang-quan,CHEN Yong,ZHANG Ai-mei,WU Ta,ZHANG Jiang-xin(Manufacturing Management Department,Bayi Iron&Steel Co.,Baosteel Group) |
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| Abstract: | This paper introduced X70 pipeline steel production process,three kinds of composition design were used(mediumC-Nb-V-Cr,lowC-Nb-V-Cr-Mo or lowC-Nb-Ni-Cu-Cr).Lowtemperature rolling and coiling are adopted in hot rolled process and tapping temperature,temperature fed back from rough rolling and CVN index are controlled accurately.Difference of strength and toughness among three compositions exist as follows: no matter what compositions design can obtain eligible strength and CVN index.Distinguished difference... |
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| Keywords: | pipeline steel design strength toughness structure |
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