摘要
采用光学显微镜、小样电解、扫描电镜及能谱、ImageJ软件等分析检测方法,对SAE1144易切削钢由18 mm圆棒冷拉拔至15 mm八角棒过程中产生表面裂纹的区域进行研究。结果表明:八角棒裂纹扩展区有大颗粒状MnS夹杂、细长条形团簇状MnS夹杂以及大块的FeO夹杂,开裂面有大量密集的细长条状MnS;而大块的FeO夹杂是裂纹产生的微裂纹源,大颗粒状MnS夹杂、细长条形团簇状MnS夹杂是裂纹扩展的主要原因。
The surface crack area of SAE1144 free cutting steel during cold drawing from 18 mm round bar to 15 mm octagonal bar was studied by means of optical microscope,sample electrolysis,SEM+EDS and ImageJ software.The results show that there exist large granular MnS inclusions,elongated strip cluster MnS inclusions and massive FeO inclusions in the crack propagation zone of octagonal bar,and lots of dense elongated strip MnS present on the crack surface.The large FeO inclusions are the source of microcracks,and the large granular MnS inclusions and elongated strip cluster MnS inclusions are the main causes of crack propagation.
作者
王高峰
钟亮美
周楠
张志明
付建勋
Wang Gaofeng;Zhong Liangmei;Zhou Nan;Zhang Zhiming;Fu Jianxun(State Key Laboratory of Metallurgy and Preparation of High Quality Special Steel Jointly Built by the Provincial and Ministry,Shanghai Key Laboratory of New Technology Development and Application of Iron and Steel Metallurgy,School of Material Science and Engineering,Shanghai University,Shanghai 200072,China;SGIS Songshan Co.,Ltd.,Shaoguan 512123,Guangdong,China)
出处
《钢铁钒钛》
CAS
北大核心
2022年第1期190-196,共7页
Iron Steel Vanadium Titanium
基金
国家自然科学基金(51874195)
2020年广东省科技专项(200720154531804)。
