Development Of Wear-Resistant Steel Grade NM400 For Engineering Mechinary

The engineering machinery industry of medium and thick steel plate demand rapid growth, which in the domestic set off launched a large-scale modernization of medium and heavy plate mill boom; this makes the number of medium and heavy plate mill of our country increased significantly; at the same time, the production technology and the equipment technical level has been improved rapidly.More modern plate production line accelerated cooling process has been the iron and steel production country in the world on a wide range of applications. In recent years due to the continuous development of computer technology, people of accelerated cooling process in the steel micro-structure change prediction, and mechanical properties of structural steel design research more and more get attention. Controlled rolling and controlled cooling is to control rolling process of rolling temperature and deformation conditions, deformation temperature, deformation and strain rate), interval time, eventually rolling temperature, rolling cooling rate and final cooling temperature and other process parameters. Controlled rolling and controlled cooling can not only control the steel of the macroscopic shape and size properties Ideal, but also by the deformation control and phase control of the steel micro grain size and organizational structure is more ideal, to ensure that the final plate comprehensive performance is very excellent. In view of this on a hot rolling process of controlled rolling and cooling process on to formulate reasonable production process has important meaning control.Combined with rheological stress model, and use the gleeble3800 Thermos simulation machine of thermal compression experiments, of a certain type of nm400 engineering machinery with the CCT curve of wear resistant steel. At the same time, the simulation research online quenching process in the main parameters of the steel micro-structure and materialistic transformation effect, for the steel in production practice in the process of improving the rolling process and the development of online quenching production the steel wear-resistant steel provides a theoretical basis and reference materials.