摘要
研究了不同加热温度下32.1 mm×4342 mm X80M钢板的奥氏体晶粒组织变化行为,研究结果表明:原始奥氏体晶粒尺寸随加热温度升高逐渐长大,当加热温度≤1 160℃时,原始奥氏体晶粒细小;原始奥氏体晶粒尺寸对Ar3温度会产生影响,总的趋势是奥氏体晶粒越细,Ar3温度就越高,转变产物也越细小;奥氏体化温度的降低可以细化奥氏体晶粒,能够提供更多的形核位置,有利于铁素体的生成,可改善材料的韧性,尤其是可以大大提高大壁厚管线的落锤性能。
The change behavior of austenite grain structure of 32.1 mm ×4 342 mm X80 M at different heating temperatures was studied. The results showed that the primitive austenite grain size grew gradually with the increase of heating temperature. When the heating temperature was no more than 1 160 ℃, the primitive austenite grain size was fine. The primitive austenite grain size had an effect on Ar3 temperature, and the general trend is that the finer the austenite grain is, the higher the Ar3 temperature is and the finer the transition product is. The reduction of austenitizing temperature can refine austenite grains, provide more nucleation sites, facilitate the formation of ferrite, and improve the toughness of materials, especially the drop hammer performance of large wall thickness pipelines.
作者
李中平
杜江
熊祥江
张勇伟
彭宁琦
彭清
LI Zhongping;Du Jiang;XIONG Xiangjiang;ZHANG Yongwei;PENG Ningqi;PENG Qing(Hunan Valin Xiangtan Iron and Steel Co.,Ltd.,Xiangtan 411101,China)
出处
《金属材料与冶金工程》
CAS
2020年第1期32-36,共5页
Metal Materials and Metallurgy Engineering
基金
长株潭国家自主创新示范区专项(2018XK2301)。
关键词
奥氏体
加热温度
X80M
落锤
austenite
heating temperature
X80M
drop-weight tear test
