魏氏组织形成机理及对钢管性能影响的分析研究  

Analysis and Study on Effect of Widmanstatten Structure Formation Mechanism on Pipe Properties

作　　者：宁玫[1] 李志群[1] 孙梅红[1] 张志远[1] 杨翠丽[1] 

机构地区：[1]天津钢管集团股份有限公司技术中心,天津300301

出　　处：《天津冶金》2008年第5期118-124,共7页Tianjin Metallurgy

摘　　要：利用万能光学显微镜、扫描电子显微镜、透射电子显微镜等大型精密仪器对低碳低合金钢管中出现的魏氏组织进行了级别判定、高倍形貌观察和精细结构研究;对不同温度和冷速条件下进行热处理工艺试验的管材进行了力学性能对比。通过试验确定了魏氏组织的形成温度范围和形成魏氏组织的冷速区间,搞清了魏氏组织对钢性能(尤其是冲击性能)的影响规律。分析研究了魏氏组织的形成机理。Class evaluation,microstructure observation and fine structure study are carried out for the widmanstatten structure appearing in low carbon low alloy steel pipe via big precise instruments such as universal optical microscope,scanning electron microscope and transmission electron microscope. Mechanical property comparison is made for the test pipe heat treated under different temperatures and cooling rates. The temperature and cooling rate ranges for widmanstatten structure formation are determined via the test; the affecting law of widmanstatten structure on steel properties(especially impact property) is clarified. The formation mechanism of widmanstatten structure is analyzed and studied in the paper.

关 键 词：低碳 低合金 钢管 魏氏组织 冷速 形态 性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]