The advantages of induction hardening, briefly describe the characteristics and applications of indu

To purchase laser quenching equipment, please choose Zhejiang Jiuheng Optoelectronics. Quenching is a process of temperature transformation, the high temperature of the material will lead to the melting of the material, and the low temperature will affect the hardness of quenching, so whether the quenching process needs to control the temperature of the surface of the material is an important consideration of the current laser quenching equipment, at present, there are two ways of laser quenching: temperature-controlled quenching and non-temperature-controlled quenching.

Temperature-controlled quenching is the use of coaxial infrared temperature sensor, real-time temperature detection of quenching parts, and control the laser output power through controller feedback, so as to achieve constant temperature quenching of the material, which is very useful to ensure the quality of quenching and improve the adaptability of the material, but the purchase cost of the equipment is higher. Non-temperature-controlled quenching is mainly based on artificial observation and hardness testing to quench the material, mainly relying on...

1.The heat source is on the surface of the workpiece, which has a fast heating speed and high thermal efficiency.

2.The workpiece is not heated as a whole, so the deformation is small.

3.The heating time of the workpiece is short, and the amount of surface oxidation and decarburization is small.

4.The surface hardness of the workpiece is high, the notch sensitivity is small, and the impact toughness, fatigue strength and wear resistance are greatly improved. It is beneficial to give full play to the potential of materials, save material consumption, and improve the service life of parts.

5.The equipment is compact, easy to use, and the working conditions are good.

6.Facilitates mechanization and automation.

7.It is not only used for surface quenching, but also for penetrating heating and chemical heat treatment.

Induction hardening equipment is generally an induction hardening machine tool, which is composed of induction power supply, load line, capacitor, transformer, inductor and machine tool.

Answer]: State vertical slip induction quenching has the following characteristics: extremely fast heating speed, shortening the transition time; After quenching, the surface layer of the workpiece can obtain extremely fine cryptoneedle martensitic with a slightly higher hardness (2 3HRC).

Low brittleness and high fatigue strength; The workpiece treated by this process is not easy to oxidize and decarburize; The hardened layer is deep, easy to control and operate, easy to mechanize and automate.

However, induction heating equipment is more expensive, it is difficult to maintain and adjust, and inductors with complex shapes and parts are not easy to manufacture.

Induction hardening is suitable for gears, shafts, sleeves and other workpieces made of medium carbon steel or medium carbon alloy steel that are subjected to alternating loads such as torsion and bending, and the surface cavity layer is required to withstand higher stress or wear resistance than the core wax.

Induction hardening is also called induction heating surface quenching, induction hardening is basically surface quenching, but surface hardening is not necessarily induction hardening. Because there are many kinds of rapid heating methods used in case hardening, such as induction heating, flame, electrical contact, laser and so on. In other words, induction hardening is one of the surface hardening processes.

Case hardening typically uses a high-frequency induction method to heat the surface of a workpiece followed by rapid cooling.

Quenching is integral quenching, and the internal and external structure of the metal is the same. Surface quenching is the internal structure unchanged, and the external structure crystallization changes and hardens.

Induction hardening is basically surface quenching, and its principle is to use the high-frequency skin effect, so the higher the frequency, the smaller the quenching depth.

Induction hardening is a heat treatment process that uses electromagnetic induction to quickly heat the workpiece and then cool it quickly.

Surface quenching is to quench the surface of the workpiece, and the core of the workpiece also maintains high toughness, and the surface quenching generally adopts induction heating, that is, induction hardening.

Surface quenching is high-frequency quenching.

They are all applied to surface quenching to ensure high hardness on the surface and strong toughness of the core. Ensure the working performance of the workpiece. However, the scope of application is not the same, generally carburizing and quenching is used in low carbon steel, and high frequency is used in structural steel.

In addition, carburizing quenching has some chemical changes in addition to microstructure changes. Hope it helps.

The hardness of carburizing and quenching parts is higher than that of high-frequency induction heating quenching, because carburizing increases the carbon content of the parts, and the higher the carbon content, the higher the hardness when quenching.

Carburizing is generally aimed at low-carbon steel, which will change the chemical composition of the surface layer by increasing the surface carbon content and increasing the surface hardness; The high frequency does not change the chemical composition of the surface layer, that is, the workpiece is quickly heated with induction current to obtain extremely fine martensite, and the hardness is improved.

The basic similarities have already been said upstairs, and I will add: high-frequency induction hardening is more energy-efficient, safe, and fast.

Hello! If you find that the temperature is higher than the standard during induction hardening, it may be due to one of the following reasons:

1.The electromagnetic induction energy of induction hardening is too high, resulting in an increase in the surface temperature of the workpiece. You can try adjusting the electromagnetic induction energy bucket or quenching time of induction hardening to solve this problem.

2.There are more oxides or other impurities on the surface of the workpiece, which leads to an increase in surface temperature. You can try cleaning the surface of the workpiece or using purer materials to solve this problem.

3.The process parameters of induction hardening are unreasonable, resulting in an increase in temperature. You can try to adjust the process parameters of induction hardening, such as the number of mountains, current, frequency, etc., to solve this problem.

If none of the above methods can solve your problem, it is recommended that you consult a professional induction hardening technician or engineer for more professional help and guidance.

The principle of quenching: the metal workpiece is hammered and then heated, and it is quickly put into ice water, so that it instantly enters the cooling state from the high temperature state, after this process, the hardness of the metal workpiece will rise, and the performance will be better and more stable. In psychology, the theory that applies the same principle is called the "quenching effect".

Quenching process.

Degreasing - rust removal - coating protectant - cool drying - furnace - heating - isothermal - heating - heat preservation - quenching - (water or oil or other) - inspection - (back to Honghonghuo, see tempering process).

Application of the principle of quenching in pedagogy.

The quenching principle is equivalent to "cold treatment" and "frustration education" in pedagogy. For troublesome matters or contradictions that have intensified, you may wish to adopt "cold treatment" and let it go for a period of time, so that you will think more thoroughly and your methods will be more secure. For students who have been praised for a long time and have some hot heads, it is advisable to set up a small obstacle and apply "frustration education", and after several exercises, their psychology will become more mature and their psychological tolerance will be stronger.

In the process of giving a speech, leaving some blank space will achieve a good speech effect. When criticizing, cold treatment is equivalent to a blank effect, which is to provide students with an opportunity to think and introspect.

"Cold treatment" is relative to "heat treatment". The so-called "heat treatment" is to focus on positive education, understand it with reason, move it with emotion, and influence students. When students make mistakes, they should be pointed out in a timely manner, and educational corrections should be given to curb the further development of the situation, and the students' misunderstandings and behaviors should be corrected, so that they can develop healthily.

Hello! The characteristics of induction heating case quenching are as follows:

1. The use of induction heating quenching equipment has high productivity, the depth of the hardened layer is easy to control, easy to realize mechanization and automation, and is suitable for mass production.

2. After quenching, the extremely fine cryptocrystalline martensitic structure is obtained, and the hardness is higher than that of ordinary quenching HRC2 3And the brittleness is low, and the toughness is better.

3. The quenching temperature is high, due to the extremely fast heating speed, the phase transformation temperature of the pearlite into austenite increases, the phase transformation range expands, and the induction heating and quenching equipment is higher than the ordinary heating and quenching temperature, which is generally dozens of degrees higher.

Figure: Induction heating and quenching equipment.

4. The heating speed of induction heating and quenching equipment is extremely fast, and it generally takes a few seconds to dozens of seconds to heat the parts to the quenching temperature.

5. There is residual compressive stress on the surface of the workpiece after quenching, the fatigue limit is high, and it is not easy to oxidize and decarburize.