Effect of mould design on the Niyama criteria during solidification of CH3C 80t ingot

ABSTRACT

Eighty tons of CH3C steel ingots used as backup rollers which should have high wear resistance and fatigue strength. Centreline Shrinkage porosity of 80 tons steel ingot reduces resistance to fatigue. The shapes of the mould and the feeding design have the greatest impact on the formation of shrinkage porosity around the central axis. Therefore, parameters such as the ratio of height to average ingot diameter, the polygon number of ingot and concave radius of the ingot were studied on the formation of shrinkage porosity. For this purpose, the simulation of finite element method was used. Simulation results were used to select the optimal ratio of the H/D, the number of polygon and the concave radius of the ingot to produce a new CH3C 80t ingot mould in Esfarayen Industrial Complex (EICO).

KEYWORDS:

• Simulation
• ingot casting
• Niyama criteria
• shrinkage porosity
• mould design

Acknowledgement

The authors greatly appreciate Mr Heydarzade and Mr Avazpour for their guidance and useful comments throughout this study.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Esfarayen Industrial Complex.