Abstract
For the first time, technology has been developed, and experimental batch of shipbuilding steel plates (Grade ЕН36, 25 × 2150 × 8000 mm) has been produced according to the requirements of classification societies (Bureau Veritas Rules), at the rolling mill 3600, PJSC “AZOVSTAL IRON & STEEL WORKS”. The technology is developed using general requirements for the manufacture of rolled products with the thermo-mechanical controlled process and mathematical model of the rolling process, on the basis of which the calculations of deformation schedules have been performed. The technical possibility of shipbuilding steel plates (Grade ЕН36, 25 × 2150 × 8000 mm) producing using thermo-mechanical controlled process (TMCP) instead of heat treatment accessing by normalization in accordance with Bureau Veritas Rules has been conformed at the rolling mill 3600. Introduction of the thermo-mechanical controlled process instead of normalization will reduce the production cost of the rolled products by eliminating natural gas consumption for heat treatment (normalization). To prepare the certification, in accordance with Bureau Veritas Rules, it is necessary to conduct an additional series of investigations for the rolled products (Grade EH36) of different thicknesses
Highlights
Having a significant number of benefits, thermo-mechanical controlled process (TMCP) has become more widespread in the production of almost all types of rolled products
There is a separate list of special-purpose product mix, which is still produced with the use of heat treatment only
It is very important to undertake a series of studies and master the production of rolled products using thermo-mechanical controlled process (TMCP) instead of other more cost-effective methods, if the relevant standard for the product so allows
Summary
Having a significant number of benefits, thermo-mechanical controlled process (TMCP) has become more widespread in the production of almost all types of rolled products. Consumers have received products that meet up-to-date quality requirements, and producers have an additional opportunity to reduce their cost production thereby maintaining, and, in some cases, greatly improving their competitiveness. An extensive list of international standards make it possible to produce similar products in various ways, whether it be conventional hot rolling, normalizing rolling, thermo-mechanical controlled process (TMCP), or with the use of heat treatment. Struggle for production cost, competition and product quality requirements assign clear priorities for the production method. It is very important to undertake a series of studies and master the production of rolled products using thermo-mechanical controlled process (TMCP) instead of other more cost-effective methods, if the relevant standard for the product so allows
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