2205 heat treatment process, 20 steel heat treatment process

The 2205 heat treatment process is as follows:

Between 1000-1050 keep warm for 1-2 hours, fast air cooling or water cooling.

2205 is duplex stainless steel.

2205 International Generic Names:

2205 Duplex Steel, UNS S32205, UNS S32205, NAS 329J3L, F51, W-nr
cr22ni5mo3n

022Cr22Ni5Mo3N Duplex Stainless Steel00Cr22Ni5Mo3N is a duplex stainless steel composed of 21% chromium, molybdenum and nickel-nitrogen alloys. It has high strength, good impact toughness, and good overall and local resistance to stress corrosion. Duplex stainless steels have twice the yield strength of austenitic stainless steels, a feature that allows designers to reduce weight when designing products, giving this alloy an advantage over 316,317L.

This alloy is particularly suitable for temperatures ranging from -50°F to +600°F. This alloy can also be considered for applications beyond this temperature range, but there are some limitations, especially when applied to welded structures.

Chemical Composition: Carbon C:

Silicon SI:

Manganese mn:

Phosphorus p: sulfur s:

Chromium Cr:Molybdenum Mo:

Nickel Ni: Nitrogen N:

Applications:

Pressure vessels, high-pressure storage tanks, high-pressure pipes, heat exchangers (chemical processing industry).

Oil and gas pipelines, heat exchanger fittings.

Sewage treatment system.

Pulp and paper industry sorters, bleaching equipment, storage and handling systems.

Rotary shafts, press rolls, blades, impellers, etc. in high-strength and corrosion-resistant environments.

Cargo boxes for ships or trucks.

Food processing equipment.

Between 1000-1050 keep warm for 1-2 hours, fast air cooling or water cooling.

2205 Mechanical Properties:

Tensile strength: b 795MPa, yield strength b 550MPa, elongation: δ 15%, hardness 310 (HB).

2205 Corrosion Resistance and Main Use Environment:

2205 Duplex Stainless Steel Compared with 316L and 317L austenitic stainless steels, 2205 alloy has superior performance in terms of resistance to spot corrosion and fracture corrosion, it has high corrosion resistance, and compared with austenite, it has a lower coefficient of thermal expansion and higher thermal conductivity. Duplex stainless steel 2205 alloy has twice the compressive strength compared to austenitic stainless steel, and designers can reduce its weight compared to 316L and 317L. Alloy 2205 is particularly suitable for the -50°F +600°F temperature range and can also be used at lower temperatures in tightly restricted situations, especially for welded structures.

Hot forming. We recommend that molding should be done below 600°F as much as possible. When performing the hot stamping process, the entire workpiece should be heated in its entirety, which should be carried out in a temperature range of 1750°F to 2250°F, where alloy 2205 is very soft.

If the temperature is too high, alloy 2205 is prone to thermal tearing. If this temperature is lower, the austenite will break. Below 1700°F, intermetallic phases form quickly due to temperature and deformation.

Immediately after the thermoforming, it should be solid-melt annealed at a minimum temperature of 1900°F and quenched to restore its phase balance, toughness and corrosion resistance. We do not recommend stress relief, but if it must be done, the material should be melt annealed at a minimum temperature of 1900°F, followed by rapid cooling and water quenching.

Cold forming. Alloy 2205 can be cut and cold-formed. However, due to the high strength and hardness of alloy 2205, it needs to be cold-formed more than austenitic steel, and it is precisely because of its high strength that rebound should be fully considered.

Heat treatment. Alloy 2205 should be annealed at a minimum temperature of 1900°F, then rapidly cooled and water-quenched. This treatment is applied to melt annealing and stress relief.

Stress relief at temperatures below 1900°F can lead to the precipitation of harmful metallic or non-metallic phases.

2205 duplex stainless steel solution treated handicrafts.

There are more heat treatment processes, what heat treatment process do you want? In addition, what are the technical requirements to be achieved after heat treatment? If you don't say any of this, how can others guess?

Summary. 20 Steel Heat Treatment Process Heat Treatment Specification: Normalizing, 910, Air Cooling.

20 steel heat treatment: As 20 steel, it is possible to achieve an ordinary quenching hardness of 30-35HRC. It's just that due to the high heating temperature, the quenching deformation is large.

1. After rough machining, the workpiece is heat-treated and quenched as a whole (920 quenched brine), and then finished. Due to the hardness requirement of 30-35HRC, it should be possible to process all processes, which is nothing more than fine turning inner and outer circles, and trimming the spline keyway. 2. The same rough machining, quenching on the surface of the inner hole or only quenching the keyway (depending on the size of the workpiece), and finally finishing.

3. Carburizing and quenching, grinding inner holes and keyways.

20 Steel Heat Treatment Process Heat Treatment Specification: Normalizing, 910, Air Cooling. 20 Steel Heat Treatment:

As a 20 steel, it is possible to achieve an ordinary quenching hardness of 30-35HRC. It's just that due to the high temperature of the heating reputation, the quenching deformation is large. 1. After rough machining, the workpiece is heat-treated and quenched as a whole (920 quenched brine), and then finished.

Due to the hardness requirement of 30-35HRC, it should be possible to process all processes, which is nothing more than fine turning inner and outer circles, and trimming the spline keyway. 2. The same rough machining, quenching on the surface of the inner hole or only quenching the keyway with the alarm table (depending on the size of the workpiece), and finally finishing. Qingtong 3, carburizing and quenching, grinding inner holes and keyways.

Can it be carburized directly. No.

Summary. 1. Direct quenching.

Direct quenching is to pre-cool the workpiece to a certain temperature after carburizing, and then immediately quench and cool. This method is generally suitable for gas carburizing, vacuum carburizing, or liquid carburizing. In the case of solid carburizing, it is difficult to come out of the furnace and open the box because the workpiece is packed in the box, and it is difficult to adopt this method.

The advantages of direct quenching are mainly to reduce the number of heating and cooling, simplify the operation, and reduce deformation and oxidative decarburization. The disadvantage is that austenite grain growth is prone to occur due to the fact that it stays at a higher carburizing temperature for a longer time during carburizing. Direct quenching does not change the grain size of the austenite even though it is pre-cooled, so the mechanical properties may be reduced after quenching.

Direct quenching can only be used for intrinsically fine-grained steels that do not undergo significant growth of austenite grains during carburizing.

Q215 carburizing heat treatment process.

1. Direct quenchingDirect quenching is to pre-cool to a certain temperature after the workpiece is carburized, and then immediately buried for quenching and cooling. This method is generally suitable for gas carburizing, vacuum carburizing or liquid carburizing. In the case of solid carburizing, it is difficult to come out of the furnace and open the box because the workpiece is packed in the box, and it is difficult to adopt this method.

The advantages of direct quenching are mainly to reduce the number of heating and cooling, simplify the operation, and reduce deformation and oxidative decarburization. The disadvantage is that austenite grain growth is prone to occur due to the fact that it stays at a higher carburizing temperature for a longer time during carburizing. Direct quenching does not change the grain size of the austenite even though it is pre-cooled, so the mechanical properties may be reduced after quenching.

Direct quenching can only be used for intrinsically fine-grained steel, which does not have the nucleation of austenite grains during carburizing.

2. One-time heating and quenching is a slow cooling after carburizing, where it is heated and quenched. When this heat treatment does not require high core strength, and the surface requires high hardness and wear resistance, a quenching heating temperature slightly higher than AC1 can be selected. In this way, the seepage layer pre-eutectic carbide is not dissolved, the austenite grain is refined, the hardness is higher, and the wear resistance is better, while there is still a large number of pre-eutectic ferrite in the core, and the strength and hardness are low.

3. Two quenching: After the carburizing is dried and cooled, two heating and quenching are carried out. The first quenching heating temperature is above AC3 in order to refine the core structure and eliminate the surface reticulated carbide. The heating temperature of the second quenching is selected at the AC1 point temperature above the composition of the carburized layer.

The purpose of secondary heating and quenching is to refine the martensite grains in the carburized layer and obtain the permeability structure of cryptocrystalline martensite, residual austenite and uniformly distributed fine-grained carbides. Because the two quenching hair needs to be heated many times, it not only has a long production cycle and high cost, but also increases the defects such as oxidation, decarburization and deformation during heat treatment. In the past, the two quenching methods were mostly used in the essence of coarse-grained steel, but now the carburized steel is basically the essence of fine-grained steel deoxidized with aluminum, so the current two-quenching method is rarely used in production, and only has higher performance requirements.

High parts are only occasionally adopted.

You can take a look at it.

If you have any questions, you can continue to ask me.

35SIMn is heat treated to Brinell hardness HB210 240.

Hello friend<>

We are glad to serve you, after inquiry, 35simn steel belongs to low-alloy high-strength steel, and the heat treatment process needs to be as follows: 1The recommended quenching temperature is 880 -910, and the minimum quenching temperature is not less than 850.

2.It is recommended to use oil quenching or water quenching for the cooling medium. Since 35simn steel has a higher hardening tendency of hand chan, it is recommended to heat it in a quenching furnace and then cool it with oil, or the cooling medium is quenched with water and polymer compounds.

3.The tempering process: 35simn steel after quenching needs to be tempered to increase its toughness. The tempering temperature can be selected from 530 to 560 °C and kept warm for several hours, depending on the thickness of the plate.

The Brinell hardness achieved by the tempered steel plate should be HB210-240. Bi Wang 4Sampling testing is accompanied by heat treatment, and it is necessary to sample and test the ears to ensure the rationality and reliability of the process.

The above is the details of the heat treatment process of 35SIMn after heat treatment to achieve Brinell hardness HB210 240.

The metal heat treatment process can be roughly divided into integral heat treatment (annealing, normalizing, quenching and tempering), surface heat treatment (laser heat treatment, flame quenching and induction heating heat treatment), local heat treatment and chemical heat treatment (carburizing, nitriding, metallurgizing, composite infiltration), etc. 1. Normalizing: Heat the steel or steel parts to an appropriate temperature above the critical point AC3 or ACM for a certain period of time and then cool it in the air to obtain a heat treatment process of pearlite structure.

2 annealing: the sub-eutectic steel workpiece is heated to 20-40 degrees above AC3, and after holding for a period of time, it is slowly cooled (or buried in sand or lime cooled) with the furnace to below 500 degrees and cooled in air 3 Solution heat treatment: the alloy is heated to a high temperature single-phase zone and the constant temperature is maintained, so that the excess phase is fully dissolved into the solid solution, and then cooled quickly to obtain the heat treatment process of supersaturated solid solution.

4. Aging: The phenomenon that the properties of the alloy change with time when it is placed at room temperature or slightly higher than room temperature after solid solution heat treatment or cold plastic deformation. 5 Solution Treatment:

The various phases in the alloy are fully dissolved, the solid solution is strengthened, the toughness and corrosion resistance are improved, the stress is eliminated and softened, so as to continue processing and molding. 6. Aging treatment: heat and keep warm at the temperature of the precipitation of the strengthened phase, so that the precipitated precipitation of the strengthened phase can be hardened and the strength is improved.

7. Quenching: The heat treatment process in which the austenitization of steel is cooled at an appropriate cooling rate, so that the workpiece can undergo martensite and other unstable microstructure transformation in all or a certain range within the cross-section. 8 Tempering:

The quenched workpiece is heated to an appropriate temperature below the critical point AC1 for a certain period of time, and then cooled in a method that meets the requirements to obtain the required structure and properties. 9 Carbonitriding of steel: Carbonitriding is the process of infiltrating carbon and nitrogen into the surface layer of steel at the same time.

Traditionally, carbonitriding is also known as cyanidation, and is widely used in medium-temperature gas carbonitriding and low-temperature gas carbonitriding (i.e., gas soft nitriding). The main purpose of medium-temperature gas carbonitriding is to improve the hardness, wear resistance and fatigue strength of steel. Low-temperature gas carbonitriding is mainly based on nitriding, and its main purpose is to improve the wear resistance and seizure resistance of steel.

10. Quenching and tempering: It is generally customary to combine quenching and tempering with high temperature tempering heat treatment. Quenching and tempering treatment is widely used in a variety of important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads.

After quenching and tempering treatment, the tempered sostenite structure was obtained, and its mechanical properties were better than that of the normalized sostenite microstructure of the same hardness. Its hardness depends on the high temperature tempering temperature and is related to the tempering stability of the steel and the cross-sectional size of the workpiece, generally between HB200 and 350. 11 Brazing:

A heat treatment process in which two workpieces are bonded together with brazing filler.