摘要
由于在API,ASTM以及国标等相关标准中,对试样在气体介质中的保温时间等无具体规定,在一定程度上限制了冷却介质的选用范围。通过对试样在冷却中物理过程的分析和计算,给出了气体介质冷却条件下落锤试样的保温时间,使气体介质条件下的冷却有初步的依据。同时,给出了试样温度测试的关键之处。
DWTT is the main item of fracture toughness for the pipe-line steel. The testing temperature has great effect on the DWTT results. The cooling medium choice is restricted due to there are not detailed regulations for temperature control as the specimen with gaseous cooling medium in the API, ASTM and the national standards. The analysis and calculating are made for the physical process of the cooling. The heat preservation time are provided for different temperature in the gaseous cooling medium. It provide primary sustaining base to control the cooling process of gaseous cooling medium. The essential same time. point of the temperature testing is brought forward at the
出处
《理化检验（物理分册）》
CAS
2006年第5期228-231,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
中油集团技术开发项目
高钢级管材落锤撕裂断口分析与评判技术研究(04841102)
关键词
落锤试验
冷却介质
保温时间
DWTT
Cooling mediurn
Heat preservation time
