| 微钙钢焊后显微组织中的粒状贝氏体对韧性的影响 |
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| 引用本文： | 贾坤宁,赵洪运,高彩茹,王国栋.微钙钢焊后显微组织中的粒状贝氏体对韧性的影响[J].焊接学报,2007,28(2):95-98. |
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| 作者姓名： | 贾坤宁 赵洪运 高彩茹 王国栋 |
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| 作者单位： | 东北大学,轧制技术及连轧自动化国家重点实验室,沈阳,110004 |
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| 摘 要： | 研究了焊接热模拟工艺参数t8/5对微钙钢焊接粗晶热影响区(CGHAZ)显微组织和冲击韧度的影响.利用Lepera试剂腐蚀法,采用光学金相显微镜、透射电子显微镜分析了不同t8/5条件下粒状贝氏体中MA组元的形态及分布特征.研究结果表明当冷却速度较快时,M-A组元主要以长条状、呈方向性分布;当冷却速度降低时,M-A组元逐渐变成颗粒状,并失去方向性;当t8/5＝40 s时,韧性较好.
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| 关 键 词： | 热模拟 粒状贝氏体 M-A组元 韧性 |
| 文章编号： | 0253-360X（2007）02-095-04 |
| 收稿时间： | 2006/10/18 0:00:00 |
| 修稿时间： | 2006-10-18 |
Effect of granular bainite in microstructure after welding on impact toughness for micro-calcium steel |
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| JIA Kunning,ZHAO Hongyun,GAO Cairu and WANG Guodong.Effect of granular bainite in microstructure after welding on impact toughness for micro-calcium steel[J].Transactions of The China Welding Institution,2007,28(2):95-98. |
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| Authors: | JIA Kunning ZHAO Hongyun GAO Cairu and WANG Guodong |
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| Affiliation: | State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China,State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China,State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China and State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China |
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| Abstract: | The effects of technology parameters of simulated welding thermal cycle(cooling time t8/5) on microstructures and impact toughness of CGHAZ in micro-colcium steel were studied.The M-A constituents in granular bainite were etched by Lepera reagent.The pattern,quantity and distribution of M-A constituents with different t8/5 were studied in optical microscope and TEM.The research shows that when the cooling rate is lower the M-A constituents are bacillary and directional,when the cooling rate is higher the M-A constituents are granular and direction-free.When t8/5=40 s the impact toughness is better than other cooling time. |
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| Keywords: | simulated welding thermal cycle granular bainite M-A constituents toughness |
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