The Influence Of Temperature Gradient On The Aluminium Alloy Thick Plate Rolling Deformation

Temperature, which can affect the shape, mechanical properties, rolling mill load distribution, and the surface quality of the product was the most important factor during hot rolling. Recently, the quality of the high strength high toughness thick aluminum alloys plate’s texture and performance is different from surface to center since heterogeneity of deformation. In these work, temperature, strain and stress fields of hot rolling were invested by means of finite element method. At the same time, by differential temperature rolling experiments the feasibility of rolling temperature difference, for direct practical production control to provide effective mathematics and simulation model. It has the following innovative points:1. This thesis designed a continuum temperature-differential hot rolling and non-continuum temperature-differential hot rolling experiments, through the analysis of metallographic analysis, texture analysis and numerical simulation, and proved the aluminum alloys plate rolling temperature difference can homogenize thick plate deformation.2. Acquire the temperature field of thick plate during water spray cooling by ABAQUS software, according to equivalent heat transfer coefficient of the aluminum alloys plate quenching. To import the temperature field results to the model of Deform plate rolling and the effect of the temperature field on deformation of aluminium alloys can be calculated.3. Finite element software Deform-3D is used to do the coupling analysis of the heat, force and deformation in the situation of strong compression and large deformation. Base on this, thermodynamic variety rule of the aluminium strips and roll system temperature field is researched. It also sets up the temperature field simulation model of the aluminum hot continuous rolling. and it is used to research the whole rolling process of various technological parameters to open out the orderliness of influence of the parameters on rolling temperature drop.4. This thesis outlines the approach to develop a temperature gradient model for the hot rolling of aluminium thick plate and analysed cooling time as well as coolant temperature on the properties of the product. These conclusions can provide reference for the prediction of process parameters on the final performance products.