Can 1Cr17Ni2 stainless steel be quenched twice?

OK. The processing performance is significantly improved compared with 14Cr17Ni2, and it can be used instead of 1Cr17Ni2.

1. 1Cr17Ni2 corresponding grades: 1. National standard GB-T standard: digital grade:

S43120, new grade: 17Cr16Ni2, old grade: 1Cr17Ni2,2, American standard:

ASTMA Standard: S43100, SAE Standard: A, UNS Standard:

431,3, Japanese standard JIS standard: SUS431,4, German standard DIN standard: , 5, European standard EN standard:

x17crni16-2。

2. 1Cr17Ni2 chemical composition: carbon C:, silicon Si:, manganese Mn: , phosphorus P: , sulfur S: , chromium Cr:, nickel:.

3. Physical properties of 1Cr17Ni2: Density density (20).

kg , melting point : specific heat capacity (0 100 ) kg (: thermal conductivity w (

100 , thermal conductivity w (

Linear expansion coefficient. 10-6/k)

0 100 :10, linear expansion coefficient (10-6 k).

11, resistivity (20).

.mm2 m), longitudinal modulus of elasticity.

20) GPA: 212, Magnetic: Yes.

4. Mechanical properties of 1Cr17Ni2: Delivery status: bar solution treatment, plate solution pickling, tensile strength (rm mpa):

880 1350, Tensile strength (: 690 1050, elongation a %: 12, section shrinkage (z %):

39。5. 1Cr17Ni2 heat treatment: hardness HBW: annealed 295, hardness HRB: - heating temperature: 680 800, heating method: air cooling or furnace cooling.

1Cr17Ni2 application field: suitable for the production of parts requiring high strength, toughness, plasticity and corrosion resistance, as well as load-bearing parts working in excessive humidity media.

1Cr17Ni2 stainless steel.

1Cr17Ni2 steel is a low-carbon chromium-nickel type corrosion-resistant steel with high strength and hardness. It has good corrosion resistance to oxidizing acids (nitric acid at a certain temperature and concentration, most organic acids) and aqueous solutions of organic acids. Sub-temperature quenching can effectively inhibit the high-temperature tempering brittleness of the steel.

Chemical composition. Carbon C:

Silicon Si: Manganese Mn:

Sulfur S: Phosphorus P:

Chromium Cr: Nickel Ni:

Physical properties.

1) Critical point temperature (approximate): AC1=810°C, AR1=780°C, MS=357°C.

2) Density: 3) Mass constant pressure heat capacity: (kg·k).

4) Modulus of elasticity (20°C): 210000MPa.

5) Resistivity:

6) Linear expansion coefficient: temperature 20-100°C 20 200°C 20 300°C 20 400°C 20 500°C, linear expansion coefficient: .

7) Thermal conductivity: temperature 20°C 100°C 200°C 300°C 400°C 500°C 600°C 700°C 800°C 900°C, thermal conductivity. 2]

Mechanical properties. Tensile strength b (MPa): quenched and tempered, 1080

Elongation δ5 (% quenched tempered, 10

Impact power AKV (J): quenching and tempering, 39

Hardness: annealed, 285HB

Heat treatment specifications and metallographic structure.

Heat treatment specifications.

1) Annealing, 680 700 high temperature tempering and air cooling; 2) Quenching, 950 1050 oil cooling; 3) Temper 275 350 air cooled.

Metallographic organization. The tissue is characterized by a martensitic type.

Low temperature annealing specification.

The annealing temperature is 670°C, the furnace is cooled, and the metallographic structure is pearlite.

High Temperature Annealing Specification.

Annealing temperature 850 870°C, oil-cooled or air-cooled, hardness 250HBW.

Quenching and tempering specifications.

1) Quenching temperature 950°C 1050°C, oil cooling, tempering temperature 275 350°C, air cooling, tensile strength 1100MPa, elongation 10%, impact toughness 50J cm2, hardness 285HBW

2) Quenching temperature 950 1050 °C, oil quenching, tempering temperature 280 350 °C, air cooling, tensile strength 1100 1730MPa, elongation 10% 22%, impact toughness 25 50J cm2, hardness 187 286HBW [3]

Delivery status. Generally, it is delivered in a heat-treated state, and the type of heat treatment is indicated in the contract; If not indicated, it will be delivered in a non-heat-treated state.

Typical Applications. 1) It is suitable for making plastic molds under the action of corrosive media.

2) Used for transparent plastic products, molds, etc.

It's better to go back a little higher, and if you deal with it again, you have to adjust the process a little.

Hello, 1Cr18 is a stainless steel material, generally speaking, stainless steel material is not suitable for quenching. Quenching is a heat treatment method that accelerates the heating by high temperatures, and then rapidly cools to refine the grains of the material and improve the hardness. However, due to the fact that it contains a large number of chromium, nickel and other elements, the steel material without dry rust has high corrosion resistance, toughness and plasticity, and also leads to the intergranular corrosion and deformation of the material at high temperatures.

Therefore, the quenching of stainless steel materials can easily lead to defects such as deformation and cracks of the material, which will affect the service life and performance of the material. If the stainless steel material is to be heat treated, annealing, solid solution, aging and other methods are generally used. Hope you find the above answers helpful.

17Cr2Ni2Mo belongs to the national standard alloy structural steel for forgings, and the executive standard: GB T 17107-1997

17Cr2Ni2Mo is a high-quality carburizing steel with high strength and toughness, which is used to make gears, bevel gears and other transmission parts, reducer parts, butterfly wheels, and friction parts. Medium lead only.

The chemical composition of 17Cr2Ni2Mo is shown in the following figure:

The mechanical properties of 17Cr2Ni2Mo are as follows:

Summary. Hello dear, 12CrNi3 (also known as 15CrNimoV) is an alloy structural steel containing Cr (chromium), Ni (nickel) and other alloying elements, which can be hardened under suitable process conditions. However, local quenching should consider the problems of formability and stress distribution, if the structure or hardness is uneven, it will affect the service life of the part, and may even lead to the cracking of the part.

Therefore, local quenching needs to be considered according to the specific situation, and it is recommended that the steel should be quenched after superheat treatment and suitable tempering process to obtain the ideal hardness and microstructure, and avoid the problems caused by uneven local hardness.

Dear, 12CrNi3 (also known as 15CrNimoV) is an alloy structural steel containing Cr (chromium), Ni (nickel) and other alloying elements, which can be hardened under suitable process conditions. However, local quenching should consider the problems of formability and stress distribution, if the structure or hardness is uneven, it will affect the service life of the parts, and may even lead to the cracking of the parts. Therefore, local quenching needs to be considered according to the specific situation, and it is recommended that the steel should be quenched after superheat treatment and suitable tempering process to obtain the ideal hardness and microstructure, and avoid the problems caused by uneven local hard rolling purity.

Hello, 12CrNi3 is a high-strength low-alloy structural steel, which can be locally quenched. Local quenching is a type of heat treatment of steel, where a local area of steel is heated to a high temperature and then quickly cooled to improve the hardness and strength of the area while keeping the other properties of the steel unchanged. Before the local quenching of 12CrNi3, it is necessary to carry out the preparation of hot treatment of the steel, such as uniform heating, heat preservation, etc.

At the same time, it is also necessary to select and control the quenching temperature and quenching medium according to the specific use conditions and requirements, so that the steel can achieve the expected performance and life. It should be noted that local quenching only acts on the surface area of the steel and cannot change the overall material structure and properties, so when selecting local quenching, it is necessary to evaluate and determine according to specific needs.