MAN0309MP – Theoretical and practical aspects of strand solidification to increase productivity and reduce quality defects

Description

Estimated time: 3 hours

Language: English

Modality: Virtual.

Summary of the course

This course gives a practical and technical understanding of strand solidification to increase caster productivity and reduce quality defects.

Learning outcomes:

• The casting of high-quality steels at high casting speeds requires optimum primary and secondary cooling waters
• The design of secondary cooling water spray systems must be undertaken using strand solidification models.
• Accurate steel liquidus determination and therefore steel superheat is a prerequisite for safe casting, that is, reduced risk of breakouts, increased production of prime as-cast product, increased productivity.
• Accurate determination of steel superheat enables the making of proactive decisions at the casting machine by the caster operators
• Liquidus determination is by calculation or direct in situ measurement
• Thermodynamic liquidus calculations give the most accurate results compared to simple linear regression equations
• The most widely used internal quality grading system, that is, the Mannesmann system, whilst qualitative and subjective, if used correctly, is the best method
• The use of various solidification formulas in conjunction with knowledge of segment positions in the machine, it is possible to calculate shell thicknesses, metallurgical lengths and exact location of inter columnar cracking.