| P460NL1钢的焊接热影响区粗晶区组织和性能 |
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| 引用本文： | 李友,李强,王嘉麟.P460NL1钢的焊接热影响区粗晶区组织和性能[J].东北大学学报(自然科学版),2001,22(2):150-153. |
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| 作者姓名： | 李友 李强 王嘉麟 |
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| 作者单位： | 东北大学材料与冶金学院!辽宁沈阳110004;东北大学材料与冶金学院!辽宁沈阳110004;东北大学材料与冶金学院!辽宁沈阳110004 |
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| 基金项目： | 国家九五重点科技成果推广项目! (JB0 0 970 72 0 10 ) |
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| 摘 要： | 利用焊接热模拟手段和冲击实验方法研究了国产新型低合金高强钢P460NL1焊接热影响区(HAZ)粗晶区的组织和性能在连续冷却转变过程中的变化,发现随着800℃到500℃冷却时间(t8/5)的增加,该区的组织、性能都随之而发生变化,当t8/520s,t8/5<60s时,热影响区粗晶区组织为羽毛状上贝氏体、铁素体,其性能逐渐变坏·因而在实际生产中建议严格限制使用大的焊接线能量,以确保焊接热影响区的机械性能·
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| 关 键 词： | 低合金高强钢 焊接热影响区 热模拟 连续冷却转变曲线 |
| 文章编号： | 1005-3026(2001)02-0150-04 |
| 修稿时间： | 2000年9月15日 |
Micros Structure and Property of the Coarse-Grained Zone in Weld P460NL1Steel by Thermal Simulation |
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| LI You,LI Qiang,WANG Jia lin.Micros Structure and Property of the Coarse-Grained Zone in Weld P460NL1Steel by Thermal Simulation[J].Journal of Northeastern University(Natural Science),2001,22(2):150-153. |
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| Authors: | LI You LI Qiang WANG Jia lin |
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| Abstract: | The coarse-grained zone in the heat affected zone(HAZ) of a newhigh strength low alloy steel P460NL1 was studied using themally simulated specimens. It was found that with the increase of the cooling time from 800℃ to 500℃ (t8/5), the properties and microstructure are changed gradually. When (t8/5)＜20s, the microstructure in the coarse-grained zone in HAZ becomes acceptable. When cooling time from 800℃ to 500℃ is longer than 20s, the granular bainite and ferite are fomed which results in poor mechanical properties. It is shown that the steel should be preheated before weld in order to avoid weld cool crack. |
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| Keywords: | coarse grained zone themal simulation high strength low alloy steel |
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