We experimentally investigate the influence of an alternating electromagnetic field on the surface and internal qualities of Incoloy800H superalloy billets. The electromagnetic continuous casting experiments for Incoloy800H superalloy were successfully conducted and the billets (0.1 m ˆ 0.1 m ˆ 1.2 m) were obtained. We figure out that the high frequency (20.4 kHz) electromagnetic field which is...

Preform design in forging processes is an important aspect for improving the forging quality and decreasing the production cost. The objective of this paper is to obtain an optimal perform shape in the consideration of the influence of the metal flow deformation in closed die forging process. Finite element method based DEFORMTM 3D software in conjunction with Taguchi method has been used to si...

−− An experimental study on solidification structure development and on endogenous inclusion precipitation in a continuously cast resulphurised steel is presented. Results were obtained by investigating two heats of a free cutting C-Mn steel cast in billets with a diameter of 145 mm. The as cast structure was evaluated by macroand microscopic analyses. Primary and secondary dendrite arm spacing...

The inspection of titanium billets and forged parts with conventional immersion and laser-ultrasonic techniques was performed to localize macro-zones with strong texture. The microtextured regions in these dual phase titanium parts were detected by using backscattered noise measurements. A numerical focusing technique was developed for imaging the backscattered noise in parts with curved surfac...

Rectangular waveguide is one of the earliest types of transmission lines. Rectangular waveguide can be produced by hot extrusion process. In this paper, the hot extrusion process of CuZn5 rectangular waveguide was investigated by Finite Element Method (FEM). In addition, Genetic Algorithm (GA) was used to optimize the die geometry and process conditions to achieve the lowest magnitude of extrus...

rectangular waveguide (wr) is one of the earliest types of transmission lines. rectangular waveguide can be produced by hot extrusion process. in this paper, the hot extrusion process of cuzn5 rectangular waveguide was investigated by finite element method (fem). in addition, genetic algorithm method (ga) was used to optimize the die geometry and process conditions to achieve the lowest magnitu...

IntroductIon Solidification structure and macrosegregation have great influence on the quality of high carbon steels. Center segregation in high carbon steel results in a high concentrations of chemical components especially carbon element and has a great influence on the quality of wire rod [1-3]. Wire rod with center cementite network resulting from severe segregation not only shows low ducti...

Al-Si-Mg-Cu-Ni alloy is widely used in the manufacture of high-performance car engine parts. Coarse, dendritic ?-Al and large primary Si are common DC casting billet, which harmful to performance final product. In this paper, a pulsed magnetic field melt treatment technique was applied launder platform modify billet. A transient numerical model established analyze electromagnetic field, flow te...

The technology of hot flat rolling is a complex technological process that includes multiple shaping steel billet, the temperature bullet ranging from 1100 to 900 degrees [1-6]. To deform workpiece, mill rolls are used. control over workpiece thermal state an important task aimed at quality its manufacturing [7-13]. achieve goal, mathematical model developed for calculating billet state. makes ...