Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Iron & Steel》 2017-12
Add to Favorite Get Latest Update

Spheroidizing process of ultrahigh carbon steel with 2% aluminum addition

ZHANG Wan-li;WANG Hui;XU Hai-feng;YU Feng;XU Da;CAO Wen-quan;Special Steel Department,Central Iron and Steel Research Institute;Faculty of Materials and Metallurgical Engineering,Kunming University of Science and Technology;School of Materials Science and Engineering,Huazhong University of Science and Technology;  
In order to obtain a fully spheroidizing microstructure,the spheroidizing annealing process for ultra-high carbon steel with 2% aluminum addition(UHCS-2 Al)was studied based on the mechanism of divorced eutectoid transformation. It is found that the forging microstructure of the ultra-high carbon steel with aluminum addition is composed of the pearlite with different interlamellar spacing and the continuous carbide networks due to the inhomogeneity of the composition. It is difficult to make it completely spheroidization only by using divorced eutectoid transformation process. The thickness of carbide networks is below 1 μm,normalizing below Acmtemperature can obtain uniform and fine pearlites and eliminate carbide networks. It can also reduce the number of strip shape carbides in normalizing microstructure by increasing the normalizing temperature,which is beneficial to get better spheroidizing microstructure. The complete spheroidizing microstructure for UHCS-2Al consisted of ultrafine ferrite and fine spherical cementite was obtained after normalizing at 900-925 ℃,austenitizing at 830 ℃ and then isothermal treatment for 4 h at 760 ℃.
【Fund】: 国家自然科学基金资助项目(51371057);; 国家重点研发计划资助项目(2016YFB0300101)
【CateGory Index】: TG161
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved