压力容器2017，Vol.34Issue(7)：1-4,10,5.DOI:10.3969/j.issn.1001-4837.2017.07.001
稀土对700MPa级大焊接热输入用钢的组织和性能影响
Effects of RE on Microstructure and Properties of 700 MPa Grade Large Heat Input Welding Steel
陆戴丁 1丁庆丰2
作者信息
- 1. 合肥通用机械研究院,安徽合肥230031
- 2. 江阴兴澄特种钢铁有限公司,江苏江阴214429
- 折叠
摘要
Abstract
The RE have been addressed on the improvement in steel making of the 700 MPa grade large heat input welding steel,and microstructure and properties of and its HAZ were investigated by the scanning electron microscopy,metallography,mechanical testing and welding thermal simulation.The results showed that the test steel containing RE had good match between strength,toughness and anti-large heat input welding,and the mechanical properties of the test steel containing RE meet the technical requirements,namely the yield strength ReL ≥600 MPa,the tensile strength Rm ≥700 ～ 850 MPa,the elongation A ≥ 16％,the-40 ℃ impact energy KV2 ≥47 J and the-40 ℃ impact energy of HAZ KV2 ≥34 J.The toughness of base metal and HAZ of test steel had been improved owing to RE addition.The small dispersed RE composite inclusions,which promoted the formation of acicular ferrite in HAZ,were beneficial to the improvement of HAZ toughness.关键词
稀土/大焊接热输入/组织/性能/针状铁素体Key words
RE/large heat input welding/microstructure/properties/acicular ferrite分类
机械制造引用本文复制引用
陆戴丁,丁庆丰..稀土对700MPa级大焊接热输入用钢的组织和性能影响[J].压力容器,2017,34(7):1-4,10,5.
