钢管2024，Vol.53Issue(2)：74-78,5.DOI:10.19938/j.steelpipe.1001-2311.2024.2.74.78
热输入量对890MPa臂架管焊接热影响区组织性能的影响
Effect of Heat input on Microstructure and Properties of Heat Affected Zone in 890 MPa Welded Tube for Crane Boom Service
康虹 1方明山 2贾冬梅 1付学义 3刘玉荣 1王丽珍 1赵晓峰1
作者信息
- 1. 内蒙古包钢钢管有限公司,内蒙古 包头 014010
- 2. 内蒙古科技大学,内蒙古 包头 014010
- 3. 内蒙古包钢钢联股份有限公司,内蒙古 包头 014010
- 折叠
摘要
Abstract
According to the principle of equal strength matching,the BHG-5 welding wire is selected for the conduc-ting the Y bevel cracking test and the multi-layer and multi-pass manual welding test with different heat inputs to the 890 MPa seamless steel tube for crane boom service.The cold cracking sensitivity of the material,and the effects by different heat inputs on the microstructure and the mechanical properties of the weld joint are investigated.As a result it is revealed that when the pre-heating temperature is 150℃,the occurrence of the cold cracking can be completely avoided;and along with the increase of the heat input,the strength of the weld metal joint just changes slightly,whereas the impact toughness of the HAZ of the weld joint drops obviously.Using the heat input under 20 kJ/cm will surely get the weld joint have better strength and toughness.关键词
起重机臂架管/低合金高强钢/焊接工艺/冷裂纹/热影响区Key words
tube for crane boom service/low alloy high strength steel/welding process/cold cracking/HAZ引用本文复制引用
康虹,方明山,贾冬梅,付学义,刘玉荣,王丽珍,赵晓峰..热输入量对890MPa臂架管焊接热影响区组织性能的影响[J].钢管,2024,53(2):74-78,5.
