Vertical type fast quenching furnace T6 heat treatment process for aluminum wheels

1. Overview

φ1500x2000mm aluminum alloy quenching furnace can be used for aluminum alloy solid solution and quenching heat treatment. This rapid quenching heat treatment furnace is a periodic operation resistance furnace, which is mainly used for rapid quenching, tempering and other solid solution treatment of aluminum alloy castings.

The workpieces of the heat treat furnace adopt hanging operation, with good thermal cycle state and uniform temperature.

After the completion of heating and holding, the workpiece can quickly fall from the furnace to the quenching medium in the pool within 12 seconds, and the quenching treatment quality is high.

The temperature control system adopts PID zero crossing trigger thyristor and Shanghai Guolong high precision with intelligent temperature control meter, the furnace has good stability and overtemperature alarm to ensure the normal functioning of the furnace.

Each mechanical transmission part of the T6 heat treatment furnace adopts interlocking control and operation.

2.Main Technical Parameters

(1) Rated power: 160kW ± 10%

(2) Rated voltage: 380V 3P 50Hz

(3) Rated temperature: 650 ℃

(4) Temperature control mode: PID control

(5) Number of heating zones: 1 zone connection method: Y

(6) Uniformity of furnace temperature: ≤± 5 ℃

(7) Temperature control accuracy: ± 1.5 ℃

(8) Effective working area size: Φ 1500×2000mm

(9) Quenching transfer time: ≤ 12s (furnace door opening to workpiece falling into the quenching tank)

(10) Heating time of empty furnace: ≤ 2H

(11) Empty furnace loss power: ≤ 28kw

(12) Fan power: 4kw

(13) Charge lifting motor: two speed motor(14) Furnace side outer wall temperature: ≤ 35 ℃

(15) Basket: 1 set

3. Structure introduction

The electric resistance heat treatment furnace structure is composed of heating furnace, lifting mechanism, quenching mechanism, control system, etc.

3.1 Heating furnace

The shell frame of the furnace body is welded by profile steel, and the inner wall is welded by 1Cr18Ni9Ti heat-resistant stainless steel plate.

The heating element for rapid quenching heat treatment furnace is pressed into a strip with 0cr25a15 alloy, sleeved on the insulating porcelain tube and fixed on the inner chamber of the furnace body through stainless round steel.

The hot air circulation device is composed of fan device and air guide plate. The fan device is placed on the top of the furnace body, and the fan is made of 1Cr18Ni9Ti heat-resistant steel into centrifugal fan blades.The air guide plate is made of 1Cr18Ni9Ti heat-resistant steel, and is fixed on the inner wall of the furnace through several supporting rods. The resistance strip is wrapped inside, and the heat emitted by the resistance strip is thermally circulated through the hot air circulation system to make the temperature in the furnace uniform.The ventilation device is made according to the T6 heat treatment furnace volume and forced hot air circulation to meet the requirements of uniform furnace temperature.

The base frame is used for loading furnace parts and is welded with section steel.

The shell of the furnace door is welded with steel, and the lining is of all fiber structure.

The sealing between the furnace door and the furnace body adopts the worm gear reducer to work, and the automatic inertia sealing is carried out after it is in place.

The electric resistance furnace is equipped with a charging trolley.

3.2 lifting mechanism

The lifting mechanism is composed of winch, loading frame, lifting chain, rolling wheel, etc.

3.3 control system

The temperature control system adopts PID zero crossing trigger thyristor and Shanghai Guolong intelligent meter to control the temperature. It has overtemperature alarm function to ensure that the workpiece temperature doesn’t go overhigh.

The mechanical transmission parts of the electric heat treat furnace adopt interlocking control.