Stainless steel spring refers to a spring that can work in electronics, air, steam, water and other weak corrosive media and acid, alkali, salt and other chemical etching media. GB/T 1239.2-2009 Cold roll cylindrical spring technical conditions. GB/T 18983-2003 Oil quenching and ignition spring steel wire. JB/T 10802-2007 Spring Jets is strengthened.

The spring factory designed and produced various types of stainless steel spring. Stainless steel spring is suitable for working environments such as high and low temperature, corrosion resistance. The materials mainly include 130m, 304,302,301,316,316L, 321.202.201.430.420, 631, etc.

Stainless steel spring is an elastic element that requires corrosion resistance in many industries such as chemical machinery and electronics in many industries such as chemical machinery and electronics. Or the kinetic energy is converted into elastic potential energy, and the deformation of the stainless steel spring disappears and restores the original shape after uninstalling, and transform the deformation energy into mechanical or kinetic energy.

Stainless steel spring is divided into stretching spring, compressed spring, reversing spring and precision spring according to the stress properties. Ring spring and so on. Ordinary cylindrical springs can be made into various types due to simple manufacturing and can be made according to the loading conditions. The structure is simple, so it is the most widely used. The spring should generally have high elasticity, fatigue limit, impact toughness, and good thermal and corrosion -resistant properties. The commonly used materials are the same as above. The cold roll method is commonly used in the diameter of the spring wire to be less than 20 mm. After the stainless steel spring is made, the pressure or polishing should be performed, which can improve the loading capacity and surface smoothness of the spring.

Commonly used materials Domestic stainless steel 304,302,301,316,316L, 321.202.201.430.420,

304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm3. The industry is also called 18/8 stainless steel. High temperature resistance is 800 ° C, which has the characteristics of good processing performance and high toughness. It is widely used in the industry and furniture decoration industry and the food medical industry.

304L stainless steel is also known as ultra -low -carbon stainless steel. It is a versatile stainless steel material. It is widely used to make equipment and parts that require good comprehensive performance (corrosion resistance and molding).

316 stainless steel is a type of austenite stainless steel. Because of the addition of MO elements, it has greatly improved its corrosion resistance and high temperature strength. High temperature resistance can reach 1200-1300 degrees, which can be used under harsh conditions.

631 stainless steel is my country's 0CR17NI7AL. 631 is a semi -austenite precipitated hardening stainless steel. It is a stainless steel with unstable Auspace. This steel is solid -soluble. Adjustment and treatment around the degree, the Austenite can transform the martyl, and then perform time -effectiveness. The second phase can be precipitated on the martensite matrix to strengthen the steel.

1. Thermal treatment of Austenite stainless spring steel

(1) Solid solution treatment

Standard soluble treatment specifications and equipment of Austeenia stainless spring steel

Material brand

Treatment temperature ℃

cooling method

1cr18ni9

Baseball: 1100 ~ 1150

Water -cooled

Board: 1080 ~ 1130

Water or oil

Band: 1020 ~ 1070

Cool water, cold oil or cold air

1cr18ni9ti

Baseball: 1060 ~ 1140

Water -cooled

Board: 1050 ～ 1130

Water or oil

Band: 1020 ~ 1070

Cool water, cold oil or cold air

0CR17NI14MO2

1020 ~ 1120

Cool water, cold oil or cold air

0CR18NI12MO2TI

1020 ~ 1100

Cool water, cold oil or cold air

1CR18NI12MO2TI

1020 ~ 1100

Cool water, cold oil or cold air

(2) Stable recovery treatment

Austenite stainless spring steel stable recovery treatment specifications and equipment

Material brand

Treatment temperature ℃

Insulation time (h)

1cr18ni9

430 ~ 480

2H

Vacuum stove

or

Time -effective stove

1cr18ni9ti

0CR17NI14MO2

380 ~ 480

2N

0CR18NI12MO2TI

1CR18NI12MO2TI

2. Thermal treatment of martensite stainless spring steel

(1) Matriot stainless spring steel for preparation thermal treatment of martensite stainless spring steel belongs to martensite phase change to strengthen steel

Martiner stainless spring steel preparation thermal treatment process

Material brand

Incomplete annealing

Low temperature annealing

Heating temperature ℃

Cooling medium

British hardness indentation mm

Heating temperature ℃

Cooling medium

British hardness indentation mm

2CR13

870-900

After cooling with the furnace to 600 ° C

≥4.4

730 ~ 780

Air

≥4.0

3CR13

≥4.2

730 ~ 780

≥4.0

4CR13

≥4.0

730 ~ 780

≥4.0

1cr17ni2

670 ~ 690

≥3.5

(2) The quenching and ignition treatment of martensite stainless spring steel

The final thermal treatment of the springs after the spring steel is made of springs is quenching and recovery.

The final thermal treatment process of martensite stainless spring steel is commonly used

Material brand

Quench

Return to fire

Hardness (HRC)

Heating temperature ℃

Cooling medium

Heating temperature ℃

Cooling medium

2CR13

1000 ~ 1040

Oil

300 ~ 480

Air

3CR13

1000 ~ 1040

Oil

300 ~ 480

Air

40 ~ 46

3CR13MO

1020 ~ 1060

Oil

220 ~ 300

Air

46 ~ 50

4CR13

1000 ~ 1050

Oil

320 ~ 450

Air

45 ~ 52

1cr17ni2

1000 ~ 1020

Oil

340 ~ 360

Air

3. Precision hardening stainless spring steel thermal treatment

Settlement and hardening stainless spring steel is enhanced by martial arts phase change and precipitation analyzes the comprehensive reinforcement of the two, so the basic thermal treatment process is solid -soluble treatment and timeliness.

For the semi -Austrian sports steel, the room temperature after the solid -soluble treatment is unstable, and the austenitic transformation is not completed, and it is not fully strengthened. Therefore Stabilizing the austenite to martenite. Commonly used adjustable treatment: regulatory treatment (T treatment), cold treatment (R treatment), and plastic treatment (C treatment).

1. Uniform and beautiful surface state.

2. Good formability, uniform elasticity.

3. High -plasticity, fatigue strength, good thermal corrosion resistance.

4. The surface status of the material is selected by the user: naked lines, nickel -plated spring lines, plating resin spring lines, and stainless steel springs are divided into bright surfaces, fog surfaces, and half -bright surfaces. Customers can choose according to the requirements of the precision and beauty of the product.

5. Whether it is a magnetic or weak stainless steel spring.

All products can be widely used in electronics, home appliances, industry, civilian and other products.

There are two ways to use stainless steel spring to remove oil and oxide.

1. Immersed the stainless steel spring into a plastic container with metal cleaning agent A (cleaning agent A and clear water dilution of 1: 1 or 1: 2) with water diluted with water. It is advisable to have a metal color, and the soaking time should not be too long. Take it out and wash with water. In this way, the surface of stainless steel spring has a sub -light effect.

2. In the ultrasonic equipment, the proportion of cleaning agents and water is about 1:30. The time is suitable for the spring surface of the spring surface, and the oxygen peroxide recovers metal. Effect.

The above two methods can be suitable for spring with high precision.

3. Washing agent A Put in the vibration light decoration machine with coarse abrasives and spring or in hexagonal drums (the volume ratio of spring and coarse abrasive is 1: 3, and the amount of cleaning agent is 1%-2%of the spring weight of the spring ) After grinding and polishing, wash with water, and the scratches on the surface of the spring are gone, which increases the smoothness of the spring surface. However, this method should not be used for spring with high precision.

The second step is to give the stainless steel spring light:

Put the light brilliant B in a rough abrasive vibration light decoration machine or in the hexagonal drum (the volume ratio of the spring and the abrasive is 1: 3, and the amount of light brilliant B is about 1%-2%of the spring weight. The more the time, the more After the long), after polishing, remove it with water and dry it. So the surface of the stainless steel spring is like a nickel -plated light -plated person, and will never fade.

Chemical polishing is a common surface treatment process for stainless steel. Compared with the electrochemical polishing process, the advantage of its largest stainless steel polishing product is that it does not require DC power supply and special fixture. It can polish complicated parts with high productivity. In terms of functionality, in addition to obtaining the surface of physical and chemical cleanliness, chemical polishing can also remove the mechanical damage layer and stress layer of the stainless steel surface to obtain the surface of the mechanical cleanliness. Mechanical strength, extending the service life of the parts. Since the patent of stainless steel chemical polishing in the early 1940s, many formulas have been in the world so far, but people are still difficult to be in actual application. Because there are many stainless steel varieties, and different brands of stainless steel have different corrosion laws, and the same solution cannot be adopted, so there are many types of stainless steel chemical polishing solutions. Basic composition of chemical polishing solutions includes corrosive agents, oxidants and water. The corrosion agent is the main ingredient. If stainless steel is dissolved in the solution, polishing cannot be performed. The oxidant and additives can inhibit the process and make the reaction in the direction that is conducive to polishing. Water is regulated on the concentration of the solution to facilitate the spread of the product. Whether the stainless steel chemical polishing can be carried out smoothly depends on the reasonable cooperation of the above ingredients.

Stainless steel electrolytic polishing is to hang stainless steel products on anode, and perform anode electro -electro -electro -electrocular stainless steel polishing operation in the electrolytic polishing solution. Electrolytic polishing is a special anode process. During the entire anode electrolyte polishing process, the surface of stainless steel products perform two contradictory processes at the same time, that is, the metal surface oxidation film is constantly generated and dissolved. However, the conditions of the protruding parts of the stainless steel products and the chemical film of the concave parts are different. Due to the anode solubility, the concentration of metal salt in the anode area has continued to increase. Mucous membrane layer. The thickness of the thickness of thick mucosa on the surface of the product is different, and the current of the anode micro surface is unevenly distributed. The current density of the micro -convex is large and the dissolution is fast, so that the surface of the product surface is burning or micro -convex, and the level of the product is solid to the leveling; Due to different current density distribution, the surface of the product is constantly forming film and dissolving at different rates. Two opposite processes on the surface of the anode, film formation and dissolution, the continuous generation and dissolution of the passivation film, the surface of stainless steel products is flattened, reaching a highly smooth and gloss appearance, satisfying the purpose of polishing the surface of stainless steel products.