| 不同冷速下钛微合金化Q345B钢的HAZ组织及性能 |
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| 引用本文： | 赵晶军,龙木军,汪勤政,曹俊生,刘涛,陈登福. 不同冷速下钛微合金化Q345B钢的HAZ组织及性能[J]. 中国冶金, 2019, 29(3): 11-14. DOI: 10.13228/j.boyuan.issn1006 9356.20180251 |
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| 作者姓名： | 赵晶军 龙木军 汪勤政 曹俊生 刘涛 陈登福 |
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| 作者单位： | (1. 重庆大学材料科学与工程学院， 重庆 400030；2. 重庆大学钒钛冶金及新材料重庆市重点实验室， 重庆 400030) |
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| 基金项目： | 重庆市自然科学基金;中央高校基本科研业务费 |
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| 摘 要： | 焊接热影响区(HAZ)的微观组织很大程度上决定了钢材焊接处的力学性能。为了掌握含钛微合金钢Q345B在不同焊接线能量下热影响区的微观组织及性能演变规律，采用Gleeble 3500热模拟试验机，对含钛微合金钢Q345B焊接过程中热影响区的组织演变进行模拟试验研究，分析了冷却速率对热影响区的微观组织及冲击韧性的影响。结果表明，大线能量焊接低冷速下热影响区组织以粒状贝氏体为主，t8/5为120 s时，析出针状铁素体，针状铁素体的出现有利于焊接热影响区冲击韧性的提升。
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| 关 键 词： | 含钛微合金钢 焊接热影响区 微观组织 冲击韧性 |
Microstructure and properties of titanium microalloyed Q345B steel in heat affected zone at different cooling rates |
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| ZHAO Jing jun,LONG Mu jun,WANG Qin zheng,CAO Jun sheng,LIU Tao,CHEN Deng fu. Microstructure and properties of titanium microalloyed Q345B steel in heat affected zone at different cooling rates[J]. China Metallurgy, 2019, 29(3): 11-14. DOI: 10.13228/j.boyuan.issn1006 9356.20180251 |
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| Authors: | ZHAO Jing jun LONG Mu jun WANG Qin zheng CAO Jun sheng LIU Tao CHEN Deng fu |
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| Affiliation: | (1. College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China;2. Chongqing Key Laboratory of Vanadium Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400030, China) |
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| Abstract: | The microstructure of heat affected zone(HAZ)has a great effect on the mechanical properties of steel welding. In order to study the evolution of the microstructure and properties of titanium micro alloyed steel Q345B in heat affected zone under different welding line energy, an experimental study on the microstructure evolution of Ti containing micro alloyed steel Q345B in heat affected zone during welding process was carried out with a Gleeble 3500 thermal simulator. The effects of cooling rate on the microstructure and impact toughness of heat affected zone were also analyzed. The results revealed that the microstructure of heat affected zone mainly consisted granular bainite. When t8/5 was 120 s, the impact toughness in heat affected zone was improved with the occurrence of acicular ferrite. |
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| Keywords: | Ti microalloyed steel welding heat affected zone microstructure impact toughness |
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