QQ客服 官方微博 反馈留言

	Study on laser welded heat-affected zone in new ultralow carbon bainitic steel
	Zhao, Lin ; Chen, Wuzhu ; Zhang, Xudong ; Shan, Jiguo
	2010-05-10 ; 2010-05-10
关键词	ultralow carbon bainitic steel laser welding heat-affected zone microstructure mechanical properties Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Mining & Mineral Processing
中文摘要	800 MPa grade ultralow carbon bainitic (NULCB) steel is the recently developed new generation steel, which was produced by thermo mechanical controlled processing & relaxation-precipitation controlling transformation (TMCP&RPC) technique. The microstructure and the mechanical properties of the heat-affected zone (HAZ) in NULCB steel under laser welding conditions were investigated by using a Gleeble-1500 thermal simulator. The experimental results indicate that the simplex. microstructure in the HAZ is granular bainite that consists of bainite-ferrite (BF) lath and M-A constituent when the cooling time from 800 to 500 degrees C (t(8/5)) is 0.3-30 s, and the M-A constituent consists of twinned martensite and residual austenite. As t(8/5) increases, the hardness and tensile strength of HAZ decreases, but they are higher than that of the base metal, indicating the absence of softened zone after laser welding. The impact toughness of HAZ increases at first and then decreases when t(8/5) increases. The impact energy of HAZ is much higher than that of the base metal when t(8/5), is between 3 and 15 s. It indicates that excellent low temperature toughness can be obtained under appropriate laser welding conditions.
语种	英语 ; 英语
出版者	JOURNAL OF UNIV OF SCIENCE AND TECHNOLOGY BEIJING ; BEIJING ; 30 XUEYUANLU, BEIJING 100083, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24044]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao, Lin,Chen, Wuzhu,Zhang, Xudong,et al. Study on laser welded heat-affected zone in new ultralow carbon bainitic steel[J],2010, 2010.
APA	Zhao, Lin,Chen, Wuzhu,Zhang, Xudong,&Shan, Jiguo.(2010).Study on laser welded heat-affected zone in new ultralow carbon bainitic steel..
MLA	Zhao, Lin,et al."Study on laser welded heat-affected zone in new ultralow carbon bainitic steel".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。