No abstract

The existing problems of rolls handling facilities, as in the case of PJSC "Magnitogorsk Iron and Steel Works" Long products shop were considered in terms of a proposition to have them solved by means of introduction of an automated information system for accounting and management. A review of literary sources on issues of information technology, management, logistics and organization of rolls handling facilities was performed. The basic provisions of automated information system have been developed, and the issue of rolls handling facilities management on its basis is considered.

Nowadays, the technology of shape-rolled steel production defines the quality and strength of common purpose and critical building structures. To provide for all the necessary mechanical characteristics, it is necessary to pay attention to each phase of steel production: melting, casting, reheating, rolling and cooling. Often, due to poor production equipment and lack of appropriate technologies steel alloying is applied. This deteriorates steel weldability and significantly increases the cost of the rolled product. The article reviews the final stage properties formation – water quenching stage after the rolling mill. Now, at mill 450 of OJSC Magnitogorsk Iron and Steel Works (MMK) vanadium is used for microalloying during the production from 09G2S steel, which provides for the specified technical properties of steel. The developed quenching technology provides for a possibility to decrease the level of microalloying. The following mathematical simulation was carried-out: steel section cooling down during quenching; heat treatment of section steel using DEFORM 3D + Heat Treatment software and further physical simulation to define convective heat transfer temperature coefficients, find tendencies to hardening and dynamics analysis which made it possible to develop a three section module located after dividing shears consisting of 176 nozzles (44 nozzle blocks). As for the proposed design of water cooling line, regimes which provides strength classes 345, 390 and 440 MPa are developed for L-steel with sizes from 40x40x4 to 125x125x16 mm, channel steel from 50 to 180 mm web length and strip (of equivalent thickness).

The analysis of two roll pass design options of ten roughing stands atOJSC “MMK” 370 rolling mill has been performed. The usage of a new form of the roll grooves will allow achieving higher durability of the rolls. Lesser rolls consumption will allow saving up to 800K rubles annually. More uniform load distribution by the stands will reduce the possibility of main mill lines equipment breakdowns due to the jumps of rolling torque in the most loaded non-equiaxial stands. Better contact conditions and higher billet stability at the input into equiaxial grooves will reduce the amount of metal clogging. Moreover, a changed strain diagram – with higher roll pass design efficiency factor – will increase the roll out of foundry production defects.