高碳热轧盘条中的带状组织及其对拉丝变形行为的影响  

Formation and Deformation of Banded Structure in High Carbon Steel Rod

作　　者：董岩[1] 方峰[1] 蒋建清[1] 顾菡妍[1] 涂益友[1] 

机构地区：[1]东南大学材料科学与工程系,江苏南京210096

出　　处：《机械工程材料》2005年第8期9-12,共4页Materials For Mechanical Engineering

基　　金：江苏省"十五"重点攻关资助项目(BG2000011-2);江苏省自然科学基金资助项目(BK2001215)

摘　　要：采用光学显微镜和扫描电镜观察了SWRH77B高碳盘条中带状组织的形貌,并观察了带状组织在拉丝冷变形过程中的行为。结果表明:高碳盘条中的带状组织为马氏体。粗大的带状组织将直接导致拉丝断裂;稍小一点的带状组织不会引起拉丝断裂,但在钢丝内部存在着明显的非稳态扩展裂纹,是不安全的;细小的带状组织不会引起拉丝断裂,最终将以断续的点状形态存在于成品钢丝中,但对其安全性存在重大隐患。With the help of optical microscopy （OM） and scanning electron microscopy （SEM）, the formation and deformation of banded structure in high carbon steel rod was studied. The banded structure in SWRH77B high carbon steel rod might be martensite. The large banded structures would lead to break during drawing. The intermidiate ones would result in extensible crack but not result in break during drawing. The small ones could exist inside the wire in the form of incontinuous particulates, resulting in a decrease of the performance of wire.

关 键 词：高碳盘条 带状组织 形变 偏析 马氏体 

分 类 号：TG355.6[金属学及工艺—金属压力加工]