Progress in solidification modeling of cast iron in China

Liu, B.C.

doi:10.1080/13640461.1999.11819283

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…Many works [1][2][3][4][5][6][7][8][9][10][11][12][13][14]24,[32][33][34] were reported on the effect of liquid contraction and expansion due to graphite formation. However, most of them are based on uniform solidification.…”

Section: Expansion Of Castingmentioning

confidence: 99%

“…Further, although the computer simulation is now widely used in the industry, the porosity defects estimation 19,25,[34][35][36][37][38][39] based on those unclear formation mechanisms often fail in decreasing the defects. This paper critically reviews the formation mechanism including the estimation method and proposes a mechanism and challenges.…”

Section: Introductionmentioning

confidence: 99%

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Mechanism and estimation of porosity defects in ductile cast iron

Ohnaka¹,

Sato²,

Sugiyama³

et al. 2008

International Journal of Cast Metals Research

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Although there are many works on the formation mechanism of porosity defects due to solidification in ductile cast iron, the formation mechanism is still not clear and decreasing the porosity defects is still a main issue in the industry. This paper critically reviews conventional explanations for the porosity formation including estimation methods. Based on the discussion the authors propose a formation theory where it considers gas and oxide entrapment during mould filling, expansion of outer part of casting due to graphite formation and pressure decrease in the inner part, followed by the growth of entrapped small gas bubbles. This mechanism can explain various facts in practice and be usable to estimate the defects. It also gives a good way to design effective risers. Future challenges are also discussed including the effect of inoculation on the fluidity of the mushy region.

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Section: Expansion Of Castingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanism and estimation of porosity defects in ductile cast iron

Ohnaka¹,

Sato²,

Sugiyama³

et al. 2008

International Journal of Cast Metals Research

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“…As a result of it, the trial-produce cycle may be significantly shortened so that it can meet the need of obtaining the market in time. [1][2][3][4][5][6][7][8][9][10][11][12] Through about 20 years' development and optimization of many researches, InteCAST software, which 200 sets of them have been sold out, have been shown to reach quite practical level in aspects of flow filling simulation and temperature field simulation of casting process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Mold Filling and Temperature Field on Shell-Mold Chilled Casting Process

Ping¹,

Cai²,

Bo-kang³

et al. 2008

Jnl of Comp & Theo Nano

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The mold filling and temperature field simulations on shell-mold chilled casting process were studied during the trial-produce of car camshaft by commercial InteCAST software. For the sake of process optimization, two casting processes namely original process and optimized process were used to compare. The result showed that casting defects such as gas cavity and inclusion were prone to form in camshaft casting for original process during mold filling process, at the same time for original process the reason why the more defects such as misrun, cold-shut and material property in camshaft casting are clarified by coupling simulation of fluid field and temperature field. Based on the simulation result, during mass-produce of car camshaft application on optimized process the casting defects have been significantly prevented and great economic benefits and social benefits are brought for both foundry industry and society.

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“…Therefore it can provide a reliable foundation for the process control and the improvement of the casting quality and has both significant theoretical importance and practical application potential. [1][2][3][4][5] In 1966, Oldfield 6) pointed out that the solidification structure of the casting could be simulated and he made an attempt to do so. In the late 1980s, the Monte Carlo method was used for modeling the nucleation and growth of the grains.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Simulation of Aluminum Alloy Using Parallel Computing Technique.

Feng

Liu

2002

ISIJ International

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The formation and evolution of the microstructure of casting are important research areas in the field of material science and engineering. The solidified microstructure of aluminum alloy was simulated by combining the CA (Cellular Automaton) model with macro heat transfer. A modified CA (MCA) model, which uses a more similar shape to the actual dendrite to describe the growth grain, was proposed and studied. Because of the huge computational capacity to simulate the microstructure of casting, a relevant parallel computing technique based on the serial arithmetic was developed, which can greatly improve the computing scale and efficiency and can also ensure the computing accuracy as well. The simulation results are compared with the experimental results and agreed quite well.

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Progress in solidification modeling of cast iron in China

Cited by 9 publications

References 2 publications

Mechanism and estimation of porosity defects in ductile cast iron

Mechanism and estimation of porosity defects in ductile cast iron

Numerical Simulation of Mold Filling and Temperature Field on Shell-Mold Chilled Casting Process

Microstructure Simulation of Aluminum Alloy Using Parallel Computing Technique.

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