加热温度对热成型桥壳钢组织和性能的影响研究
Research on the Effect of Heating Temperature on the Structure and Properties of Hot Formed Bridge Shell Steel
王建忠 1李斌 1李冠楠1
作者信息
- 1. 邯郸钢铁集团有限公司,河北 邯郸 056001
- 折叠
摘要
为了确定适合的热成型桥壳钢料片加热温度,研究了 Q460QK在750 ℃、800 ℃、850 ℃、900 ℃四个加热温度条件下,保温90 s后空冷至室温的材料的金相组织、拉伸性能、系列温度冲击韧性的变化.结果表明:随着加热温度的升高,原始针状铁素体组织转变为准多边形铁素体和珠光体组织,当加热温度超过750 ℃时,试样的屈服强度大幅下降,由530 MPa降低至388 MPa,不同温度热处理后材料均具有良好的低温韧性.试验结果为热成型桥壳钢冲压前加热温度的设定提供一定的经验借鉴.
Abstract
In order to determine the suitable heating temperature for the hot formed bridge shell steel sheet,the changes in the metallographic structure,tensile properties,and series temperature impact toughness of Q460QK material after air cooling to room temperature for 90 seconds were studied under four heating temperature conditions of 750 ℃,800 ℃,850 ℃,and 900℃.The results show that as the heating temperature increases,the original acicular ferrite structure transforms into quasi polygonal ferrite and pearlite structure.When the heating temperature exceeds 750 ℃,the yield strength of the sample significantly decreases,from 530 MPa to 388 MPa.The materials have good low-temperature toughness after heat treatment at different temperatures.The experimental results provide some experience and reference for the setting of heating temperature before stamping of hot formed bridge shell steel.
关键词
材料/热成型桥壳钢/加热温度/拉伸性能/冲击韧性/金相组织Key words
materials/hot formed bridge shell steel/heating temperature/tensile performance/impact toughness/metallographic structure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据