CAJ | 학술논문

对湘潭钢铁有限公司生产的低碳冷镦钢SWRCH15A进行了1/3冷镦实验,利用光学显微镜、扫描电子显微镜、X射线衍射分析和透射电子显微镜分别对冷镦前后试样的横向、纵向截面进行了形变特征与微观组织的研究.结果表明,试样经1/3冷镦变形后呈鼓形,金相与扫描电镜观察发现组织呈明显的3个不均匀变形区域.冷镦变形后铁素体形成尺寸较小的纤维状亚晶结构,呈现〈111〉纤维织构和弱的〈100〉纤维织构.冷镦变形后,珠光体片层组织减少,片层厚度明显缩小.冷镦变形后组织中发现有一种新相形成.
대상담강철유한공사생산적저탄랭대강SWRCH15A진행료1/3랭대실험,이용광학현미경、소묘전자현미경、X사선연사분석화투사전자현미경분별대랭대전후시양적횡향、종향절면진행료형변특정여미관조직적연구.결과표명,시양경1/3랭대변형후정고형,금상여소묘전경관찰발현조직정명현적3개불균균변형구역.랭대변형후철소체형성척촌교소적섬유상아정결구,정현〈111〉섬유직구화약적〈100〉섬유직구.랭대변형후,주광체편층조직감소,편층후도명현축소.랭대변형후조직중발현유일충신상형성.
In this paper, the low carbon cold-heading steels SWRCH15A from Xiangtan Iron and Steel Company Limited are examined by 1/3 cold heading test. The microstructures and deformation characterizations of the transverse cross-section and longitudinal section before and after cold heading are examined by the optical microscope,scanning electron microscope, XRD diffractometer and transmission electron microscope. The results show that the sample is drum-like after the cold heading,and is distinguished into three nonuniformly deformed regions by optical and SEM of the pearlite becomes obviously smaller. A new unknown phase is detected to be formed after the cold heading.