Annealing furnace system Introduction
I. Annealing process introduction
Annealing is a metal heat treatment process, refers to the metal is slowly heated to a certain temperature, maintain enough time, and then cooled at an appropriate rate, sometimes natural cooling, and sometimes controlled speed cooling of the heat treatment method.
Two. The purpose of annealing:
1. reduce hardness, soften workpieces and improve machinability.
2. Improving or eliminating all kinds of structural defects and residual stresses in the process of casting, forging, rolling and welding, reducing the tendency of deformation, cracking or cracking.
3. refining grain and improving structure to improve mechanical properties of workpiece and eliminate tissue defects.
4. Uniform the structure and composition of the material, improve the properties of the material or prepare the microstructure for subsequent heat treatment, such as annealing and tempering.
In actual production, annealing process is widely used. According to the different purposes of annealing, there are many kinds of annealing processes, such as complete annealing, spheroidizing annealing, stress relief annealing and so on.
Three. Use of annealing furnace:
Annealing furnace series industrial furnaces are widely used in foundry, metallurgy, automobile, aerospace, military, shipping, light industry, electric power and other industries. They can be used in high chromium, high manganese steel castings, gray cast iron castings, rollers, bearings, steel balls, wear-resistant liners and other metal workpieces for different annealing heat treatment processes.
Four. Annealing furnace operation mode:
The annealing furnace is made of a square or circular structure with refractory bricks and aluminium silicate fibers for composite insulation, or with a full-fiber insulation lining structure. The workpiece is placed in the furnace and heated to the workpiece in the furnace by means of electric heating, or by means of oil or gas. The workpiece is heated to the desired temperature in natural or protective atmosphere. After annealing for a certain period of time, the annealing process will naturally cool down or control the speed of cooling. There are many kinds of annealing furnace series, and there are different ways of operation. The trolley type annealing furnace has a loading trolley which operates independently. The loading and unloading operation is more convenient and can load large heavy-duty workpieces. The well type annealing furnace is suitable for vertical loading of shaft, rod and pipe fittings. The annealing heating is not easy to deform.
Five. Classification of Annealing Furnaces:
1. The annealing furnace is divided into three types by different heating methods: electric heating, fuel heating and gas heating. They are electric annealing furnace, fuel annealing furnace and gas annealing furnace respectively.
3. The different structure of annealing furnace is divided into car-type annealing furnace, well-type annealing furnace, box-type annealing furnace and bell-type annealing furnace.
4. The annealing furnace can also be divided into vacuum annealing furnace, controlled atmosphere annealing furnace and annealing furnace heated in natural atmosphere.
Six. Brief introduction of each series of annealing furnace
Trolley type annealing furnace
It is mainly used for annealing high chromium high manganese steel castings, gray cast iron castings, rolls, steel balls, wear-resistant liners and other workpieces. It is an advanced heat treatment technology with rapid heating, heat preservation, high efficiency and energy saving.
Well annealing furnace
Well-type annealing furnace is a national standard energy-saving periodic operation annealing furnace, mainly for long shaft, rod, pipe and other mechanical parts for annealing heat treatment. Long rod workpiece, shaft workpiece, such as barrel, turbine shaft, rotor, etc. are loaded and heated vertically in shaft furnace, so bending deformation can be avoided.
Box annealing furnace
It is mainly used for annealing heat treatment of steel parts, various metal parts, automotive parts, etc. It adopts microcomputer program automatic temperature control cabinet to carry out annealing process curve with high precision.
Bell type annealing furnace
The aluminium alloy annealing furnace is the exclusive patent of our company. It is the most advanced automatic annealing furnace production line of aluminium alloy in the world at present. It is mainly used for rapid automatic annealing heat treatment of aluminium alloy castings, aluminium profiles, aluminium alloy sheets, aluminium alloy network plates, pistons, etc.
Bright annealing furnace
Hankou Electric Furnace Company applies a number of patented technologies to develop a series of bright annealing furnace, which can annealing metal, alloy materials, copper, stainless steel workpieces in a protective atmosphere or vacuum to achieve oxidation-free, keep the surface bright annealing process.
Stress relief annealing furnace
Stress relief annealing, also known as low temperature annealing, mainly eliminates the residual stress in casting, forging, welding, cold stamping and machining. The stress relief annealing process is programmed freely, and the heating rate, holding temperature and holding time are automatically controlled. The temperature control precision reaches 1.
Quick annealing furnace
Hankou Electric Furnace specializes in the manufacture of rapid annealing furnace, from the material to design through strict quality control, to achieve the highest thermal efficiency, rapid heating, rapid completion of annealing heat treatment process.
Vacuum annealing furnace
It is mainly used for bright non-oxidizing annealing heat treatment of precision parts, as well as bright non-oxidizing vacuum annealing or heating of automobile parts, ordnance and aerospace precision parts or forgings. It can also be used for bright non-oxidizing annealing of copper in non-ferrous metal industry.
Horizontal Vacuum Annealing Furnace
The furnace is a new generation of high precision vacuum annealing furnace with fixed horizontal structure, easy installation and high efficiency. It is mainly used for vacuum annealing, bright annealing and vacuum heating of various mechanical parts and metal workpieces.
Large gas annealing furnace
The large gas annealing furnace manufactured by Hankou Electric Furnace Company is mainly used for various large-scale metal or alloy workpieces and large-scale annealing heat treatment. It uses natural gas or gas as the medium to burn and heat up. It has advanced control and high precision.