tailieunhanh - SCIENCE AND TECHNOLOGY OF CASTING PROCESSES_2

Casting process is the most direct method of producing a product from the chosen material. Though products in all the three major classes of materials, metals, ceramics and polymers can be produced by this method, casting of metals is by far the most widely used process. The basic steps in the casting process are preparation of the material in the liquid state, transferring the liquid material into a shaping mold, allowing the transformation of liquid material in the mold into a solid form. | Chapter 6 Control Technology of Solidification and Cooling in the Process of Continuous Casting of Steel Qing Liu Xiaofeng Zhang Bin Wang and Bao Wang Additional information is available at the end of the chapter http 51457 1. Introduction Solidification and cooling control which is a key technology in the continuous casting process has a quick development in recent years and meet the modern requirements of the continuous casting process on the whole. However the control models and cooling technology need constant development and improvement due to the trend toward delicacy and full automation in continuous casting. This chapter discusses the hot ductility the thermophysical properties the solidification and cooling control models and nozzles layouts for secondary cooling besides these the planning for the process of steelmaking-rolling which are closely related with solidification and cooling in continuous casting process. 2. Research on the thermal physical parameters of steels This section summarizes formulae for calculating thermal physical parameters of steel slabs including the liquidus temperature solidus temperature thermal conductivity and so on. The database of thermal physical parameters including thermoplastic was specially established and embedded in the control model of the solidification and cooling which is convenient to query data and update operation for technical staffs. Moreover based on the thermoplastic parameter database the target surface control temperature of slab is determined for the production of various grades of steels. And the database is helpful for users to acquire more accurate results of the heat transfer model. INTECH open science I open minds 2012 Liu et al. licensee InTech. This is an open access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the .