optimization of intercritical annealing process
microstructure evolution models are useful for process design, optimization and control. Recently, a number of advanced microstructure models for intercritical annealing have been proposed using meso-scale modelling approaches including cellular automata and phase field methods.1113) However, for the industrial environment, pragmatic models
the nal grain size, the texture developed during the nal annealing caused an improvement in the core losses. Paolinellia and da Cunha  produced a low core loss electrical steel with 3% (Si + Al) by optimizing the hot rolling process followed by a two-step cold rolling. The optimization of the core Effect of Annealing Processes on Microstructures and The process with pre-quenching treatment could improve mechanical properties as well as shorten the optimal annealing time. The steel with two stage annealing process achieved optimal mechanical properties after pre-quenching and annealing at 625 °C for 4 h with tensile strength of 1177 MPa, total elongation of 30.92 % and UTS*TE of 36.39 GPa%.
Jun 09, 2011 · During continuous annealing in the intercritical region, an increase in the heating rate from 10 to 50 K/s increases the volume fraction of austenite formed due to the dominance of the growth of austenite over the nucleation process, which prevails at the lower heating rate. Influence of silicon addition on intercritical annealing Sep 21, 2020 · The intercritical annealing (IA) process is used to get the needed microstructure. During IA, carbon and manganese partition from - or -martensite to austenite, and a long IA time are often required because of the slow diffusion of manganese [ 17, 18 ].
optimization, as it is the only strengthening mechanism that intercritical annealing was extensively studied in coarse the microstructure evolution to the variation of the process-ing variables. Therefore, the crucial intercritical annealing parameters (heating rate, holding temperature, holding time, OPTIMIZATION BY SIMULATED ANNEALING:AN combinatorial optimization proposed by S. Kirkpatrick et al. That study investigated how best to adapt simulated annealing to particular problems and compared its performance to that of more traditional algorithms. This paper (Part I) discusses annealing and our parameterized generic implementation of it, describes how we adapted this generic
Feb 09, 2020 · Optimization of TSV interconnects and BEOL layers under annealing process through fracture evaluation F. Qin Institute of Electronics Packaging Technology and Reliability, College of Mechanical Engineering and Applied Electronics Technology, Beijing Optimization of a Moving Averages Program Using a Oct 01, 2016 · optimization via simulated annealing algorithm To improve upon initial protocol performance we implemented an SA algorithm in MatLab that stochastically varied the values of N, and upper and lower TLs (TL H and TL L , respectively) while maintaining the CL constant.
Mar 27, 2013 · The weights of plasticity (hardness, yield strength, section shrinkage and elongation) of annealed material were calculated by analytic hierarchy process, and then the process parameters were optimized by the grey theory system. Role of Intercritical Annealing in Enhancing the Cross Jan 19, 2021 · During intercritical annealing, the as-quenched martensite () lath changes to tempered martensite, which is then followed by the formation of ferrite (). Considering that the annealing temperature is higher than the dissolution temperature of carbide (Ref 44), only laths remain in the specimen. Meanwhile, the boundaries of the martensite and ferrite have higher interfacial
- BenefitsApplication & MaterialsProcess DetailsSteels with higher carbon content, and most high-alloy steels, which are allowed to air cool after hot working, such as forging or hot rolling, are usually hard to machine. Soft annealing reduces the hardness and makes the material easier to machine. Soft annealing of low carbon steels < 0,35% C will normally result in a structure too soft and sticky for cutting operations. The risk of hardening cracks during re-hardening of quenched and tempered steel can be reduced by soft annealing prior to the hardening Effect of Intercritical Hardening on Properties of 60Si2Mn Effect of subcritical quenching on austenite crystal and the degree of hardness of 60Si2Mn steel were studied by experiment. The results show that non-dissolved ferrolites inhibited austenites growth, so grains of 60Si2Mn steel after intercritical hardening was thinner than conventional quenching. With the elongation of holding time the grain size grown up, and the hardness decreased
THE EFFECTS OF INTERCRITICAL HEAT TREATMENTS ON E ect of intercritical heat treatment on 0.14wt%C 0.56wt%Mn 0.13wt%Si struc-tural steel has been investigated. Specimens for single quenching and those for double quenching were prepared for intercritical heat treatment. The heat treat-ment of the experimental steel was based on intercritical annealing in the ferrite +
combination of intercritical process par ameters leads to obta ining the opti mal mean tensile strength of 527 . 1 MPa, the optimal mean h ardness of 76.2 HRB, and the optim al mean ductility of 0