摘要
研究了一种适用于管道钢管和管件制造的X70级管线钢在不同加热温度下的奥氏体晶粒长大规律和组织-性能间的关系。给出了试验钢奥氏体晶粒平均截距D和奥氏体化温度T的定量关系式。分析认为：随加热温度的升高，X70级管线钢的强度增加，韧性下降；当加热温度为850—1050℃时，可获得较好的强韧配合。
The article discusses and finds the Auster grain growing rules and relations of structure and properties of X70 steel in weld pipe and pipe accessories under the different heating temperature.And it also points out the formula of average intercept D of Auster grain and Austerization temperature T in test steel and further finds that X70 strength becomes higher and roughness becomes lower with the higher heat temperature,and within the scope of 850～1 050 ℃,the march of strength and roughness is better.Also it discusses the relationship of strength and roughness and structure of pipeline steel in heat process.
出处
《焊管》
2007年第1期17-20,81,共4页
Welded Pipe and Tube
基金
国家自然科学基金(50374056)
中国石油天然气集团公司科研项目(2002F70127
ZYT-0208)
关键词
X70级管线钢
钢管
管件
热过程
晶粒尺寸
加热温度
组织性能
pipeline steel
steel pipe
pipe accessories
heat process
dimension of grain frame
structure properties
