X100管线钢在预应变中的脆化  

Embrittlement of X100 Pipeline Steel during Pre-strain

作　　者：彭涛[1] 程时遐[1] 吉玲康[2] 张骁勇[1] 高惠临[1] 

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065 [2]中国石油天然气集团公司石油管工程技术研究院,陕西西安710065

出　　处：《管道技术与设备》2014年第1期1-3,共3页Pipeline Technique and Equipment

基　　金：国家自然科学基金项目(51174165)

摘　　要：管线钢的脆化是管道安全的一个突出问题。针对管道工程的要求,采用材料显微分析方法和力学性能测试等手段,对X100管线钢在预应变中的脆化规律进行了研究,为X100管线钢管的工程施工和安全服役提供试验依据。结果表明:随着预应变量的增大,强度和硬度增加,伸长率和韧性下降,使试验钢X100产生脆化。预应变形成的机理是管线钢位错亚结构的变化。The embritflement of pipeline steel is a glaring problem for pipeline safety. According to the requirements of pipe- line engineering, the embrittlement law of X100 pipeline steel was studied during pre-strain through a microscopic analysis meth- od, mechanical property tests, ect. This law may provide a trial basis for the engineering construction and safe service of XIO0 pipeline steel. The results show that pre-strain results in embrittlement of X100. With the increase of strain, strength and hardness increase while elongation and toughness decrease. The formation mechanism of pre-strain embrittlement is the change of the dislo- cation substructure.

关 键 词：X100管线钢 预应变 脆化 

分 类 号：TG142[一般工业技术—材料科学与工程]