Meng, Y., Zhang, J.-S., Yi, Y.-S., Zhou, J., Sugiyama, S., Yanagimoto, J.
55799357000;56199032900;57194446951;56510510800;35411955300;7004611347;
Study on the effects of forming conditions on microstructural evolution and forming behaviors of Cr-V-Mo tool steel during multi-stage thixoforging by physical simulation
(2017) Journal of Materials Processing Technology, 248, pp. 275-285. 被引用 3 次.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020234287&doi=10.1016%2fj.jmatprotec.2017.05.039&partnerID=40&md5=beef2b42b64364c263a9a894270cf482

DOI: 10.1016/j.jmatprotec.2017.05.039
归属机构: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China;
Institute of Industrial Science, The University of Tokyo, Tokyo, 153-8505, Japan
摘要: The inhomogeneous quality of products manufactured by semisolid forming is mainly attributed from the phase segregation of semisolid metal slurry during forming. Phase segregation can be inhibited by lower forming temperature, higher strain rate, and lower stroke. However, the realization of net-shape forming with above parameters is quite difficult. In this study, a multi-stage thixoforging strategy including a partial melting, a fast first compression, a partial solidification, and a secondary compression was proposed to weaken phase segregation of thixoformed samples. A physical simulation of multi-stage thixoforging was conducted on commercial rolled Cr-V-Mo tool steel SKD11, using a multistage hot compression test machine. The microstructural evolution and forming behaviors of the SKD11 steel slurries in different stages of multi-stage thixoforging with various forming parameters were investigated experimentally. Out flow of liquid phase does not occur throughout the thixoforming, and can be inhibited effectively by partial solidification and subsequent secondary compression. SKD11 steel sample more homogenous microstructure and smoother surface was manufactured by multi-stage thixoforging including a fast first compression with a stroke of 4 mm and a strain rate of 2.0/s at 1280 °C, a partial solidification to 1240 °C with a cooling rate of 2 °C/s, and a secondary compression with a stroke of 2 mm and a strain rate of 0.1/s at 1240 °C. © 2017 Elsevier B.V.
作者关键字: Ferrous alloy;  Liquid segregation;  Semisolid process;  Two-step compression test
索引关键字: Compression testing; Forging; Iron alloys; Microstructural evolution; Phase separation; Segregation (metallography); Slurries; Solidification; Steel; Tool steel; Tools, Forming conditions; Forming parameters; Forming temperature; Liquid segregation; Physical simulation; Secondary compression; Semi-solid forming; Semi-solid process, Strain rate
通讯地址: Meng, Y.; College of Materials Science and Engineering, Chongqing UniversityChina; 电子邮件: meng@iis.u-tokyo.ac.jp
出版商: Elsevier Ltd
ISSN: 09240136
CODEN: JMPTE
原始文献语言: English
来源出版物名称缩写: J Mater Process Technol
文献类型: Article
来源出版物: Scopus