Coupled preparation technological method for aluminum alloy plates

An aluminum alloy sheet material and preparation technology, which is applied in the field of aluminum sheet raw rolling production, can solve problems such as inconsistent core surface quality, coarse center structure, and low strength and hardness, achieve high cooling intensity, improve core quality, and meet performance requirements Effect

Active Publication Date: 2018-07-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of thick center structure, inconsistent quality of core and surface, and low strength and hardness in the case of conventional thick plate rolling, so as to meet the performance requirements of the product

Method used

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  • Coupled preparation technological method for aluminum alloy plates
  • Coupled preparation technological method for aluminum alloy plates
  • Coupled preparation technological method for aluminum alloy plates

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0053] The 5182 aluminum alloy that has been heated at 450°C and held for 2.5 hours is used as the rolling material (thickness 120mm). The slab heated at ℃ and held for 2.5 hours is quickly transferred to the position of the rolling mill, the transfer time is shortened as much as possible, and the heat loss during the transfer process is reduced, and conventional rolling is carried out on a two-roll reversing rolling mill. Take part of the finished product and anneal at 370℃ / 2h. The structure of the surface layer, 1 / 4 and core is as follows: Figure 8 shown.

example 2

[0055] The 5182 aluminum alloy that has been heated at 450°C and held for 2.5 hours is used as the rolling material (thickness 120mm). The rolling procedure is 120→94→76→59→41→27→15→8.5→5 (mm), and the The slab is quickly transferred to the transfer roller of the rolling mill (due to the high thermal conductivity of aluminum, in order to maintain the temperature gradient in the thickness direction, it cannot stay for a long time after cooling before entering the rolling mill), open the cooling device, and let the slab pass through the cooling device with the roll , spray water to cool the upper and lower surfaces, the cooling time is 6s, measure the temperature of the surface through a temperature measuring instrument, cool the surface temperature to about 260°C, and then carry out rolling, the surface temperature after rolling is 310°C-320°C , under the cooling device on the other side, carry out the second pass of pre-rolling cooling, the cooling time is 3s, so that the surfa...

example 3

[0057] The 5182 aluminum alloy that has been heated at 450°C and held for 2.5 hours is used as the rolling material (thickness 120mm), and the rolling procedure is 120→100→82→68→56→48→38→30→23→16→9→5 (mm), quickly transfer the 120mm slab to the transfer roller of the rolling mill (due to the high thermal conductivity of aluminum, in order to maintain the temperature gradient in the thickness direction, it cannot stay for a long time after cooling before entering the rolling mill), turn on the cooling device, let the slab The billet passes through the cooling device with the roll, and the upper and lower surfaces are sprayed with water for cooling. The cooling time is 6s. The temperature of the surface is measured by a temperature measuring instrument, and the surface temperature is cooled to about 260°C, and then rolling is carried out. The surface temperature after rolling is At about 300°C, the second pass of pre-rolling cooling is carried out under the cooling device on the ...

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Abstract

The invention relates to the fields of controlled cooling and controlled rolling of aluminum plate production and relates to a coupled preparation technological method for aluminum alloy plates. In order to overcome the defect of larger grain size difference between the core part and the surface due to the fact that deformation is difficult to penetrate into the core part during rolling because ofsmall compression ratio as the maximum problem of heavy plate rolling, the aluminum plates are subjected to inter-pass cooling, rolling and cooling are subjected to coupled control, the good differential temperature rolling effect is realized, grain refinement of the surface is promoted, deformation permeability is enhanced, core part quality is improved, plate shape defects of lateral double drum shape and the like of rolled pieces are overcome, and yield is increased.

Description

technical field [0001] The invention relates to the field of raw rolling production of aluminum sheets, in particular to a method for controlling rolling by applying an inter-pass cooling process. Background technique [0002] This solution is aimed at the serious segregation of the thick gauge slab and the coarse structure of the center during the conventional rolling of 5182 aluminum alloy, which leads to the inconsistency between the quality below the surface and the surface quality, and the strength and hardness cannot meet the requirements for use. The compression ratio is small in conventional thick plate rolling, resulting in poor deformation permeability, difficult to eliminate core defects, serious problems such as lateral double drum defects, edge folding, etc., low yield, uncontrollable temperature of rolled pieces, and poor uniformity of structure and properties . In recent years, the research on "temperature control-deformation" coupling control is particularly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B37/46B21B1/32
Inventor 王丙兴王斌张田李家栋李勇田勇王昭东王国栋
Owner NORTHEASTERN UNIV
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