Technical configuration method for major-diameter aluminum-alloy round cast ingot heating facility

Abstract

The invention relates to a technical configuration method for a major-diameter aluminum-alloy round cast ingot heating facility, which comprises preheating and gradient heating; in the preheating step, aluminum-alloy round cast ingots are conveyed to a natural gas preheating furnace by a chain and chain conveying motor and heated at 300-350 DEG C; and in the gradient heating step, the aluminum-alloy round cast ingots moving out of the natural-gas preheating furnace are adjusted through a rotating plate by 90 degrees, pushed to an ingot conveying dolly and conveyed to an induction heating furnace for gradient heating. The heating coils are divided into different sections; the heating coils in different sections are different in temperature control, and an end temperature compensation coil is additionally arranged outside the heating coil at the discharge end of the induction heating furnace; the temperature of the end temperature compensation coil is 420-500 DEG C; the temperature gradients of in different sections from the heating coils to the temperature compensation coil are controlled to be 60-100 DEG C / m; and the aluminum-alloy round cast ingots processed by gradient heating are conveyed in front of an extruder through an extruder ingot conveying dolly to carry out simulated isothermal extrusion. The invention solves the problem of great radial temperature difference which frequently occurs in major-diameter cast ingot heating.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, in particular to a process configuration method of heating facilities for large-diameter aluminum alloy round ingots. Background technique [0002] In aluminum alloy extrusion production, the quality of the ingot heating directly affects the quality of the product. [0003] At present, the heating methods of aluminum alloy round ingots before extrusion include resistance heating, gas or oil heating, induction furnace heating, etc. Resistance heating has gradually been eliminated due to its slow heating rate. Gas or oil heating has low cost and is widely used, but it is difficult to control the temperature range. Induction heating is fast and flexible in production. Especially in recent years, in order to overcome the problem of different properties of extruded products caused by extrusion deformation heat, gradient heating of ingots has also been used to realize simulated iso...

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Problems solved by technology

[0006] However, the effect is not good for aluminum alloy round ingots with a large diameter of Φ450×1200mm. This is because the induction heating time is short, and the radial temperature difference often occurs, which affects product performance. Less than simulated isothermal extrusion effect

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