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X100管线钢焊接冷裂纹敏感性

严春妍, 元媛, 张可召, 吴立超, 王宝森

严春妍, 元媛, 张可召, 吴立超, 王宝森. X100管线钢焊接冷裂纹敏感性[J]. 焊接学报, 2019, 40(12): 41-46. DOI: 10.12073/j.hjxb.2019400310
引用本文: 严春妍, 元媛, 张可召, 吴立超, 王宝森. X100管线钢焊接冷裂纹敏感性[J]. 焊接学报, 2019, 40(12): 41-46. DOI: 10.12073/j.hjxb.2019400310
shu
YAN Chunyan, YUAN Yuan, ZHANG Kezhao, WU Lichao, WANG Baosen. Investigation on cold cracking susceptibility of X100 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 41-46. DOI: 10.12073/j.hjxb.2019400310
Citation: YAN Chunyan, YUAN Yuan, ZHANG Kezhao, WU Lichao, WANG Baosen. Investigation on cold cracking susceptibility of X100 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 41-46. DOI: 10.12073/j.hjxb.2019400310
shu

X100管线钢焊接冷裂纹敏感性

  • 1.

    河海大学, 常州 213022

  • 2.

    河海大学, 常州 213022;中车株洲电力机车有限公司, 株洲 412001

  • 3.

    宝钢集团中央研究院, 上海 200431

基金项目: 中央高校基本科研业务费专项资金资助项目（2017B17614）；国家自然科学基金资助项目（51804097）

Investigation on cold cracking susceptibility of X100 pipeline steel

  • 1.

    Hohai University, Changzhou 213022, China

  • 2.

    Hohai University, Changzhou 213022, China;CRRC Zhuzhou Locomotive Co., Ltd., Zhuzhou 412001, China

  • 3.

    Baosteel Central Research Institute, Shanghai 200431, China

摘要

    摘要
  • 摘要: 采用E10018焊条进行了斜Y形坡口焊接裂纹试验，结合数值模拟方法对X100管线钢焊接冷裂纹敏感性进行了研究，分析了预热温度对热影响区显微组织、接头硬度分布、应力应变状态的影响规律. 结果表明，X100管线钢具有一定的焊接冷裂纹敏感性，采用不高于100℃预热可以降低冷裂纹敏感性；100℃预热时裂纹率为0，此时粗晶区显微组织不是很粗大、M-A组元数量最少、硬度较低，且残余应力和应变水平都较低；但预热温度大于150℃时，粗晶区晶粒粗大、M-A组元数量增加，且接头中等效残余应力、应变水平升高，导致冷裂纹敏感性增加. 建议采用100℃进行预热.
    Abstract: The Tekken test using E10018 electrode and finite element (FE) simulation to evaluate the cold cracking susceptibility of X100 pipeline steel has been performed. The impact of preheating condition on the HAZ microstructures, distribution of hardness, and the stress-strain state in the welded joint was analyzed. The experimental results showed that X100 pipeline steel reveals certain susceptibility to cold cracking without preheating. It was found that preheating temperature below 100℃ resulted in a lower cold cracking susceptibility. Preheating temperature of 100℃ is most effective with zero cracking ratios due to a relative fine CGHAZ microstructure and low M-A constituent amount, a low hardenability, low level stress and strain level. However, excessive preheating temperature of 150℃ and 200℃ can lead to higher cold cracking susceptibility due to an increase in CGHAZ grain size, M-A constituent amount, equivalent stress level and strain level in the Tekken specimens. Preheating temperature of 100℃ is recommended to reduce cold cracking.
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    • 参考文献(12)
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  • 收稿日期:  2019-04-21

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