Concrete analysis of the effect of heat treatment

Concrete analysis of the effect of heat treatment

Alleged metal heat treatment, it is with the aid of certain thermal effect (sometimes by mechanical action, chemistry or other principals) to the change of the human internal organization and structure, metal alloy to obtain the required performance of process operations. In all kinds of metal materials and products of the production process, heat treatment is one of the indispensable important segment.
Casting is usually needed to eliminate internal stress of low temperature annealing, or completely annealing or normalizing; Some still need after quenching tempering (aging). Heat treatment of steel in the whole production process, including heat treatment of steel ingot, pressure processing and finished products in the process of heat treatment. Heat treatment of steel ingot is mainly of annealing at different temperatures. Heat treatment of steel can be used in accordance with the process performance and performance requirements. Such as all kinds of steel should be normalized processing, often in order to obtain fine and uniform microstructure and good mechanical properties. High strength quenched and tempered steel shell}! High temperature quenching tempering treatment, often to ensure that meet the requirements of the comprehensive mechanical properties. Stainless steel plate and steel belt, most solid solution treatment to improve its corrosion resistance. Hot forging (rolling) steel according to the requirements of the user to determine the heat treatment process of the products. Cold drawing (rolling) steel billet heat treatment, heat treatment and finished goods between heat treated.
Non-ferrous metal and its alloy semi-finished products or products of the production with steel and steel parts production phase 'roughly, but in the non-ferrous metal processing technology in the process, heat treatment is an important part of the more. No congratulations on heat treatment. Plate and strip production would not be performed.

Vacuum furnace production technology

Vacuum furnace production technology

Under the premise of stable equipment, new technology of performance optimization of decarburization, through summarizing and analyzing the carbon and oxygen utilization, and the yields of aluminium deoxidizing and alloying, found some empirical formula, vacuum time is greatly reduced, production speed, improve the quality of the products.
Ultra-low carbon steel vacuum furnace production technology in the process, it is difficult to control has two aspects, first, how to carbon and a minimum of 15 minutes, the second, how to 15 minutes after the remnants of oxygen content in liquid steel decarburization aluminum one-time add in place, can make the aluminum deoxidation, and ensure the aluminum alloy.
In this way, it is able to accommodate between 25 and 30 minutes. Otherwise, the vacuum time greatly extended. In the process of production of ultra-low carbon steel, along with the expansion of smelting time resistance materials and contact between liquid steel has also led to the steel back of carbon, in addition, the ultra low carbon steel because of the quantity more than aluminum, produced a lot of Al2O3 inclusions, so aluminum connecting the sooner, the better for Al2O3 inclusions float process is more advantageous to hou road operation and improve the quality of our products.

Vacuum furnace operation process

Vacuum furnace operation process

Vacuum furnace to pay attention to matters a lot in the process of operation, the following introduce the basic operation process of vacuum furnace for everybody:
1, first check the power of the vacuum furnace, water.
2, it is forbidden to smoke in hearth, open flame.
3, familiar with vacuum furnace every action buttons, understand its action.
4, open the system power and heating power, began to preheat diffusion pump.
5, pay attention to the programming temperature control table.
6, open the oven door began to feed.
7 when ventilation to switch off the pressure reducing valve, vacuum furnace, before the new cylinder change tighten, to open the valve, the air, finally tighten the valve.
8 the runtime, vacuum furnace, to leave a man guards.
9, regularly check the vacuum furnace gas supply system, circulatory system.
10 runtime unless some special cases, vacuum furnace, otherwise don't modify the vacuum furnace to run the program parameters.
11, the normal operation of vacuum furnace, it is forbidden to switch "automatic" and "manual" button.
12 and servicing of the vacuum furnace, absolutely coat pocket coat pocket.
13, at the end of the vacuum furnace heating, remove cooling lights flashing alarm, into a state vacuum furnace cooling.

Vacuum furnace air pressure quenching

Vacuum furnace air pressure quenching

Vacuum heat treatment is a kind of the increasing popularity of heat treatment technology, widely used in aerospace, automotive and machine tool industry. This paper focuses on the development of the vacuum furnace pressure quenching system, the system guarantee to obtain good metallurgical performance in the process of hardening workpiece and has the least deformation.
For the heat treatment, in the process of vacuum hardening of many of the issues has become the primary problem of distortion of work piece. For manufacturers of vacuum furnace, its purpose is to provide can obtain satisfactory metallurgical properties while maintaining stable equipment size. The cause of the deformation of workpiece deformation may occur in any heat treatment process, the possible reasons is the rapid heating caused by the thermal gradient within the workpiece forming serious thermal stress and led to the workpiece's deformation.
It is necessary to estimate workpiece deformation, there are two reasons for this. First of all, the most by the vacuum heat treatment of workpiece in service with other parts in the assembly, excessive deformation may inhibit the interaction required. Second, then correct deformation process is expensive, and may have harmful effects on the metallurgical properties of workpiece. 3. More fluid concept Strictly speaking, a degree of deformation is impossible to avoid. But several methods available to minimize deformation, in order to obtain the minimum deformation, developed the first flow gas quenching system. The system and hydraulic parts of heating and quenching cycle has a very good control.

The primary principle of vacuum brazing furnace

The primary principle of vacuum brazing furnace

Vacuum brazing furnace is in a vacuum environment to maintenance of sintering furnace heated objects, the heating method is more, such as resistance heating, induction heating, microwave heating, etc. Vacuum induction furnace is the use of induction heating to maintenance of sintering furnace heated objects can be divided into the power frequency, medium frequency, high-frequency, such as type, can be attributable to a subclass of vacuum brazing furnace.
Vacuum induction furnace Vacuum induction furnace is in a vacuum or maintain atmosphere conditions, using the principle of intermediate frequency induction heating make carbide cutter head, and all kinds of metal powder limit sintered body implementation of complete sets of equipment, is for hard alloy, metal dysprosium, and planning in the industrial production of ceramic materials.
A hydrogen sintering furnace, vacuum induction tungsten first principle and use vacuum induction furnace tungsten is after vacuum filling hydrogen maintenance conditions, using the principle of intermediate frequency induction heating, the high temperature of tungsten crucible in the winding, after thermal conduction to the work, suitable for scientific research, military units for hard metal such as tungsten, molybdenum and its alloy powder sintering molding. Second, primary layout and layout method for vertical, the discharging method. Its primary group became: electric furnace body, vacuum system, water cooling system, pneumatic system, hydraulic system and front-rear institutions, base, workbench, induction heating equipment (tungsten heater and high-grade thermal insulation material), into the electric equipment, intermediate frequency power supply and electrical control system, etc. Third, primary function After vacuum filling the hydrogen gas maintenance and control atmosphere in furnace pressure and sintering conditions.