低合金钢残余元素Cu-As-Sn的晶界偏析对晶间脆性断裂的影响

特殊钢 ›› 2009, Vol. 30 ›› Issue (4): 14-16.

低合金钢残余元素Cu-As-Sn的晶界偏析对晶间脆性断裂的影响

耿明山, 王新华, 张炯明

北京科技大学冶金与生态工程学院，北京100083

收稿日期:2009-01-06 出版日期:2009-08-01 发布日期:2022-12-20
作者简介:耿明山(1979-),男，博士生，2005年河北理工大学毕业，连铸-热轧坯研究。

Effect of Grain Boundary Segregation of Residual Elements Cu-As-Sn on Intergranular Embrittlement Fracture of Low Alloying Steel

Geng Mingshan, Wang Xinhua ,Zhang Jiongming

School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083

Received:2009-01-06 Published:2009-08-01 Online:2022-12-20

摘要/Abstract

摘要： 用Gleeble-1500热模拟机、扫描电镜和俄歇能谱仪研究了0.10Cu-0.07As-0.05Sn对低合金钢(%:0.15C、0.36Si、1.40Mn、0.003S、0.019P)高温延塑性的影响,凝固过程中的偏析和热处理过程的晶界偏析。结果表明,Cu-As-Sn在晶界的偏析明显加剧第Ⅲ脆性凹槽区的深度和宽度,提高该区上限临界温度;连铸坯不存在明显的Cu-As-Sn晶界偏析,850℃拉伸至屈服的试样和热轧板试样存在明显的Cu-As-Sn晶界偏析,说明热变形加剧残余元素的晶界偏析。

关键词: Cu-As-Sn, , 晶界, 偏析, 脆性断裂

Abstract: Effect of 0. 10Cu-0.07As-0.05Sn on segregation in solidification, grain boundary segregation in heat treatment and ductility of low alloying steel (%:0. 15C,0.36Si,1.40Mn,0.003S,0.019P) at elevated temperature have been studied by Gleeble- 1500 hot simulator, scanning electron microscope and Auger electron spectroscopy. Results showed that the segregation of Cu-As-Sn at grain boundary obviously increased the width and depth of depression of Ⅲ brittleness zone and raised upper limit of critical temperature of this zone; there was no-obviously Cu-As-Sn grain boundary segregation in cost billet and there was obviously grain boundary segregation in sample tensile-strained to yield at 850 ℃; and in sample of hot-rolled plate, it indicated the hot deformation promoted grain boundary segregation of residual elements.

Key words: , Cu-As-Sn,Grain Boundary,Segregation,Brittle Fracture

耿明山 , 王新华, 张炯明. 低合金钢残余元素Cu-As-Sn的晶界偏析对晶间脆性断裂的影响[J]. 特殊钢, 2009, 30(4): 14-16.

Geng Mingshan, Wang Xinhua , Zhang Jiongming. Effect of Grain Boundary Segregation of Residual Elements Cu-As-Sn on Intergranular Embrittlement Fracture of Low Alloying Steel[J]. Special Steel, 2009, 30(4): 14-16.