Computer-Aided Design of Some Advanced Steels and Cemented Carbides

作     者：LI Lin ZHANG Mei HE Yan-lin De Cooman Bruno Wollants Patrick 

作者机构：Shanghai University Shanghai 200072 China Katholieke Universiteit LeuvenLeuven 13-3001 Belgium Universiteit Gent Zwijnaarde 13-9052 Belgium 

出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)

年 卷 期：2005年第12卷第6期

页      面：42-48页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：ItemSponsoredbyScienceandTechnologyCommissionofShanghaiLocalGovernment(015211010)andChinaBelgium(2001242) 

主　　题：computer-aided composition design TRIP steel cemented carbide prehardened mould steel concentration profile thermodynamic kinetic equilibrium composition 

摘      要：Thermodynamic and kinetic study on TRIP （transformation induced plasticity） steels, cemented carbides and mold steel for plastics were carried out in order to design modern advanced materials. With the sublattice model, equilibrium compositions of ferrite and austenite phases in TRIP steels, as well as volume fraction of austenite at inter-critical temperatures for different time were calculated. Concentration profiles of carbon, manganese, aluminum and silicon in the steels were also estimated in the lattice fixed frame of reference. The effect of Si and Mn on TRIP was discussed according to thermodynamic and kinetic analyses. In order to understand and produce the graded nanophase structure of cemented carbides, miscellaneous phases in the M-Co-C （M= Ti, Ta, Nh） systems and Co-V-C system were modeled. Solution parameters and thermodynamic： properties were listed in detail. The improvement of machining behavior of prehardened mould steel for plastics was obtained by computer-aided composition design. The results showed that the matrix composition of large-section prehardened mould steel for plastic markedly influences the precipitation of non-metallic inclusion and the composition control by the aid of Thermo-Calc software package minimizes the amount of detrimental oxide inclusion. In addition, the modification of calcium was optimized in composition design.