金属加工（热加工）Issue(11)：138-143,6.
煨制弯管成形及热处理工艺对L360Q钢组织和性能的影响
The influence of bending and heat treatment processes on the microstructure and properties of L360Q steel
王文豪 1刘俊平 1王琛 2刘伟 3李龙 1贾祥1
作者信息
- 1. 中国重型机械研究院股份公司 陕西西安 710032
- 2. 太原科技大学机械工程学院 山西太原 030024
- 3. 太原重工股份有限公司 山西太原 030000
- 折叠
摘要
Abstract
This article adopts the hot bending test method to systematically analyze the hardness,tensile properties,and Charpy impact strength of different parts of L360Q seamless steel pipes through local induction heating bending and tempering heat treatment.The metallographic structure is observed,and the mechanical properties of L360Q steel before and after hot bending and heat treatment are compared and analyzed.The experimental results indicate that due to uneven temperature distribution during the heating process,there are differences in the deformation of various parts of the bent pipe,which in turn leads to differences in microstructure and properties.The tensile strength of the transition zone of the bent pipe at the beginning of the arc is 588MPa,and the yield strength is 520MPa,which is significantly higher than the original base material(straight seamless steel pipe)and other parts of the bent pipe;In the vicinity of the starting and ending arc sections,the hardness value is higher than that of other parts of the pipe body;After undergoing hot bending and tempering heat treatment,the metal elongation of the original base material will decrease,but the overall change in toughness is not significant,indicating that the effect of hot bending and tempering heat treatment on the toughness of steel pipes is limited.The hot bending and heat treatment process of this study meets the requirements of GB/T 9711-2023 and SY/T 5257-2012 standards,providing technical reserves and references for the design of L360Q pipeline bends.关键词
热弯成形/热处理/微观组织/力学性能Key words
hot bending forming/heat treatment/microstructure/mechanical properties引用本文复制引用
王文豪,刘俊平,王琛,刘伟,李龙,贾祥..煨制弯管成形及热处理工艺对L360Q钢组织和性能的影响[J].金属加工（热加工）,2025,(11):138-143,6.
