What are the requirements for forging temperature control?

When the temperature exceeds 300-400 (the blue brittle area of steel) and reaches 700-800, the deformation resistance will decrease sharply, and the deformation energy will also be greatly improved. According to the forging carried out in different temperature zones, it can be divided into three forming temperature zones: cold forging, warm forging and hot forging according to the different requirements of forging quality and forging process. Originally, there was no strict limit for the division of this temperature region, generally speaking, forging in the temperature region with recrystallization is called hot forging, and forging without heating at room temperature is called cold forging.

When forging at low temperatures, the size of the forging changes very little. Forged below 700, there is less scale formation and no decarburization on the surface. Therefore, as long as the deformation can be within the forming energy range, cold forging is easy to obtain good dimensional accuracy and surface finish.

As long as the temperature is well controlled, lubrication and cooling, warm forging below 700 can also achieve good accuracy. In hot forging, large forgings with complex shapes can be forged due to the small deformation energy and deformation resistance. To obtain forgings with high dimensional accuracy, hot forging can be used in the temperature range of 900-1000.

Because the forging process is carried out under the dynamic, the temperature measurement and control of the general contact thermometer is difficult to achieve, in this regard, the current process technology is selected non-contact infrared thermometer, in the selection of infrared temperature measuring instrument also has a lot of particularity, the general low temperature forging or cold forging process, the surface of the forging billet is relatively bright, it is difficult to accurately test the temperature with the general infrared thermometer, in this case, only the short band anti-high anti-high infrared thermometer is selected; If it is hot forging, the surface temperature of the forging billet is high, and it is generally in a red-hot state, at this time, a short-wave medium and high temperature infrared thermometer can be selected, but at this time, the environmental situation should be taken into account, and the environment is relatively harsh, and the appropriate protection device should be selected. There are certain differences in the specific process site, it is recommended that when the technical transformation or the new line is launched, the company chooses an experienced and powerful infrared temperature measuring instrument to cooperate with the company to solve the problem.

Medium and low temperature infrared thermometer; Medium and high temperature infrared thermometer, short wave thermometer can be realized.

Advantages of infrared temperature measuring device for forging temperature range of forging:

1. Fast response time and high precision;

3. Laser aiming, good stability, especially suitable for measuring high temperature small targets;

Millisecond response times and repeatability ensure that you meet your requirements for fast and accurate temperature measurements.

Mainly used in::

1. Quenching temperature measurement.

2. Forging temperature measurement.

3. Annealing and tempering temperature measurement.

4. Heating, diathermy and temperature measurement.

5. Special temperature measurement for aluminum.

6. Temperature measurement of metal melting.

Application industry of infrared thermometer:

1. Temperature measurement in metal metallurgical industry;

2. Reflective metal surface temperature detection;

3. Temperature monitoring in the foundry industry;

4. Temperature measurement in cement and asphalt manufacturing industry;

5. Temperature measurement in the glass industry;

6. Measuring the rolling temperature;

7. Temperature monitoring in the power industry;

8. Rotary kiln head temperature monitoring;

9. Induction heating temperature measurement;

10. High temperature and small target temperature measurement;

11. Carbon fiber, light materials, semiconductors, graphene, carbon fiber, carbon crystal, silicon crystal, etc., temperature measurement devices are used for temperature detection in the manufacturing process of carbon fiber.

Configuration: Infrared thermometer, temperature control display and other complete devices, after the user purchases, it can be used by connecting to the 220V power supply, which is simple and convenient. The temperature control display can be set to realize the automatic control and alarm of the high and low temperature of the heating equipment.

The initial forging temperature is the temperature at which forging is started and is also the maximum allowable heating temperature. The initial forging temperature should not be too high, otherwise it may cause overburning and overheating, but the initial forging temperature should not be too low, otherwise the forging operation time will be shortened, the forging temperature range will be narrowed, and the difficulty of forging will be increased. Generally, the initial forging temperature is controlled below the solidus line at 150 250.

The final forging temperature is the temperature at which forging is stopped. If the terminal temperature is too high, the grains will continue to grow at high temperature after the forging is stopped, which will make the grains of the forging coarse and reduce the mechanical properties of the forging. When the final forging temperature is too low, the plasticity of the forging is poor, the deformation is difficult, the internal stress increases, and even the forging cracks. The final forging temperature of carbon steel is about 800, and the alloy steel is generally 800 900.

If the initial forging temperature is too high, overheating and overburning will occur; The initial forging temperature is too low, the heating times are large, and the productivity is low. If the final forging temperature is too low, recrystallization cannot be carried out, the phenomenon of cold deformation strengthening cannot be eliminated, the deformation resistance is large, the plasticity is reduced, and even cracks and damage equipment and tools are produced on the forgings; The final forging temperature is too high, and the grains grow after the blank is deformed, forming a coarse structure, which reduces the mechanical properties of the forging.

First of all, the temperature of the first forging is too high, it is easy to decarburize, or even burn out, the temperature is too low, the forging is prone to cracks, and the forging is difficult.

Final forging: I don't think the temperature can be high, because the blank comes out of the furnace, and the forging takes time, and the temperature must go down during that time.

The forging temperature of steel is not the same, carbon steel is generally about 1000 degrees, and stainless steel is about 650 degrees, and it is too high to play.

Different steel grades are different, too high will burn too much, too low will cause cracking.

Billet heating is to improve the plasticity of the billet and reduce the deformation resistance, under the condition of uniform heat penetration of the billet, the heating time should be shortened as much as possible to reduce defects such as metal oxidation and reduce fuel consumption.

Forging forgings should be carried out within a certain temperature range. The forging temperature range of Shanxi Yongxinsheng is the temperature between the beginning forging temperature and the final temperature.

Initial forging temperature: The highest allowable temperature for heating is the initial forging temperature. Under the premise of no overheating, the initial forging temperature should be increased as much as possible to make the billet have the best forging performance, and can reduce the number of heating times and improve productivity.

The initial forging temperature of carbon steel is about 200 degrees lower than that of the solidus.

Final forging temperature: The temperature at which forging cannot be continued is the final forging temperature. The final forging temperature of the steel should be higher than the recrystallization temperature to ensure sufficient plasticity and the recrystallization structure can be obtained after forging.

However, if the final forging temperature is too high, it is easy to form coarse grains and reduce the mechanical properties. If the final forging temperature is too low, the forging performance will deteriorate. The final forging temperature of carbon steel is about 800.

The forging temperature is divided into the beginning forging temperature and the ending forging temperature: the initial forging temperature is 100 200 degrees below the melting point of the material, and the final forging temperature refers to the sufficient plasticity at this time.

For ordinary carbon steel, its forging temperature range is 1250 degrees to 750 degrees; For high-quality carbon steel with slightly higher carbon content, the forging temperature range is 1250 degrees to 800 degrees;

Even if the initial and final forging temperatures of carbon steel are within the standard forging temperature range at the time of forging, the forging process will produce work hardening. This is first of all through the forging process, the internal structure of the metal increases in density, the strength increases, and its hardness also increases. The second is the speed of cooling.

General forgings are naturally cooled in the air after forging, and the ambient temperature directly affects the speed of cooling. The faster the cooling, the higher the hardness. This is one of the reasons why freshly forged forgings are sometimes buried in lime to slow down the cooling rate.

The essentials of forging is to complete the required amount of deformation before the possible temperature, consider the burning loss and cost issues under the premise of ensuring plasticity, reduce the forging temperature as much as possible, and avoid forging at the final forging temperature. If you can do this, ordinary forgings should be fine.

According to the carbon content of the steel: the carbon content is less than 5 parts per thousand. The initial forging temperature shall not exceed 1250C°, and the final forging temperature shall not be less than 800C°, and the carbon content shall be greater than 5 parts per thousand. The initial forging temperature is not more than 1200C°, and the final forging temperature is not less than 850C°

1.The basic principles for determining the forging temperature range are:

1) Make the forging have better plasticity and lower deformation resistance in the forging temperature range.

2) Ensure that the internal structure and mechanical properties meet the requirements of high-quality forgings.

3) Expand the forging temperature range as much as possible in order to reduce the number of fires, save energy, and improve forging productivity.

2.The basic method for determining the forging temperature range is:

1) Carbon steel can be directly determined according to the state diagram of iron-carbon alloy.

2) Alloy structural steel can generally be determined with reference to carbon steel with the same carbon content.

3) For high-alloy steels and high-temperature alloys with low plasticity, as well as steel grades that do not undergo phase transformation (such as austenitic steel and ferritic steel), the balance diagram, plasticity diagram, resistance diagram and recrystallization diagram should be determined by comprehensive analysis of plasticity, quality and deformation resistance.

The above is the basic principles and basic methods of Shanxi Yongxinsheng forging forging to determine the forging temperature range, we can determine through the corresponding principles and methods, which ensures the accuracy of the forging.

Heating before forging of billet is an indispensable and important part of the whole forging process, which has a direct impact on improving forging productivity, ensuring forging quality, saving energy consumption and reducing product costs. The following are the purposes and requirements of forging heating:

1.Purpose of heating:

Improve the plasticity of the metal, reduce the deformation resistance of the metal, make it easy to form, and obtain good post-forging microstructure and mechanical properties of forgings.

2.Heating requirements.

1) Under the condition of allowable temperature conductivity and internal stress of metal materials, it is heated to a predetermined temperature at a fast speed to improve efficiency and save energy.

2) Reduce the absorption of harmful gases by heated metals, such as oxygen, hydrogen, nitrogen and other gases, reduce defects such as oxidation, decarburization or hydrogen embrittlement, and improve heating quality.

3) In the low-temperature heating stage, it is necessary to prevent the excessive temperature difference between the outer layer of the metal section and the core due to improper heating, resulting in excessive thermal stress, and then superimposing other internal stresses to cause material rupture.

4) Accurately implement the given heating specifications, such as heating temperature, speed, time, and heat preservation and other heating conditions, to prevent defects such as overheating, overburning, etc.

The purpose of heating is to reduce the strength and hardness so that there is good plastic deformation.

Summary. Hello dear, ha<>

Generally, the temperature of die steel forging is usually between 1050 and 1100. Temperature regulation is a key factor in forging production, high or low temperature will affect the microstructure properties and internal and external corrosion properties of steel, thereby affecting the mechanical properties obtained by the material, that is, "the vein of steel determines its quality". In addition to temperature, another important parameter of forging is forging design and die design.

The forging design includes the overall geometry and shape of the forging, as well as the complexity of the structure, and the mold design includes the shape of the mold, groove depth, tolerance requirements, etc., and the mold size and consumables can be determined according to the forging geometry and deformation and forging process requirements. Different forgings, even if they are of the same material, have different mold requirements. The mold is the basis of forgings, and only when the mold design is reasonable and the cold and hot deformation process is good, can high-quality forgings be obtained.

How many degrees is the right forging temperature for die steel.

What is the 5gm mo forging temperature?

Hello dear, ha<>

Generally, the temperature of die steel forging is usually between 1050 and 1100. Temperature regulation is the key factor in forging production, high or low temperature will affect the microstructure properties and internal and external corrosion properties of steel, thereby affecting the mechanical properties obtained by the material, that is, "the vein of steel determines its quality". In addition to temperature, another important parameter of forging is forging design and die design.

The forging design includes the overall geometry and shape of the forging, as well as the complexity of the structure, and the mold design includes the shape, groove depth, tolerance requirements of the mold, etc., which can be quietly excavated to determine the mold size and consumables according to the forging geometry and deformation and forging process requirements. Different forgings, even if they are of the same material, have different mold requirements. The mold is the basis of forgings, and only when the mold design is reasonable and the cold and hot deformation process is good, can high-quality forgings be obtained.

The 5G forging temperature makes Zhengqing generally between 1370-1570 °C, which is also the temperature with the best heat dissipation performance. In the process of heating and cooling, attention should be paid to the thermal equilibrium, and the temperature of the precursor should be stable, so as to avoid the change of the physical properties and surface structure of the metal, and the rapid deformation that is not conducive to the processing of forgings. If the 5G forging temperature is too low, it may affect the microstructure and appearance of the forging, while the temperature is too high will cause false networks and local spallation.

In addition, rapid temperature changes can also cause metal precipitation and recrystallization, resulting in a decrease in the uniformity of raw materials and parts.