35CrMnSi steel heat treatment

35crmnsiAlloy steel

35crmnsiHeat treatmentSpecification:

Quenching: 950 for the first time, 890 for the second time, oil-cooled; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

35crmnsi Introduction:

35crmnsi steel is a low-alloy ultra-high-strength steel with good comprehensive mechanical properties after heat treatment.

High strength, sufficient toughness, hardenability, weldability, processing and formability are good, but the corrosion resistance and oxidation resistance are low, and it is used after low-temperature tempering or isothermal quenching.

35Crmnsi steel is a material with good hardenability, and strength, hardness, toughness and fatigue strength can be obtained after proper heat treatment.

It has good comprehensive mechanical properties and can adapt to the complex working conditions of coal mining production.

35CrMnSi Chemical Composition:

Carbon C: Silicon Si:

Manganese Mn:Sulfur S: Allowable residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

35crmnsi mechanical properties:

Tensile strength. b (mpa)：≥1620(165)

Yield strength. s (mpa): 1275(130) elongation.

Section shrinkage 40

Impact power AKV (J): 31

Impact toughness value kv (j cm2): 39(4).

Specimen size: specimen.

35crmnsi Delivery Status:

to heat treat (normalizing.

annealed or tempered at high temperatures) or delivered in a non-heat-treated condition, the delivery status should be indicated in the contract.

35crmnsi Usage:

It is used to weld and rivet structural parts that work under vibration load, such as high-pressure blower blades, valve plates, and high-speed and high-load shafts, gears, sprockets, clutches, shaft sleeves, bolts, nuts, etc.

35crmnsi heat treatment specification: 1) quenching: 950 for the first time, 890 for the second time, oil cooling; Tempered 230, air cooled, oil.

Cold; 2) 880 is quenched at 280 310 isothermal quenching.

35crmnsia alloy structural steel.

Special Steel: 35crmnsia

Standard: GB T 3077-1988

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

Mechanical Properties: Tensile Strength b (MPa): 1620(165)Yield Strength S (MPa): 1275(130)Elongation δ5 ( 9

Section shrinkage 40

Impact power AKV (J): 31

Impact toughness value kv (j cm2): 39(4)hardness: 241hb

Grade: 35CRMNSIA Executive standard: GB T 3077-1999 unified digital code: A24353

High-strength quenched and tempered structural steel. It has high strength and toughness, high hardenability, medium cold deformation plasticity, and good cutting performance. There is a tendency to temper brittleness, and the lateral impact toughness is poor.

The welding performance is good, but when the thickness is greater than 3mm, it should be preheated to 150 first, and heat treatment is required after welding. It is generally used after quenching and tempering.

35crmnsia heat treatment process) quenching: the first 950, the second 890, oil cooling; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

1) Quenching: 950 for the first time, 890 for the second time, oil cooled; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

Tensile Strength b (MPa): 1620(165)Yield Strength S (MPa): 1275(130)Elongation δ5 (%9

Section shrinkage 40

Impact power AKV (J): 31

Impact toughness value kv (j cm2): 39(4)Specimen size: specimen.

Heat treatment specifications and metallographic structure:

Heat treatment specifications: 1) Quenching: 950 for the first time, 890 for the second time, oil cooling; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

Delivery Status: Delivered in heat-treated (normalized, annealed or high-temperature tempered) or without heat-treated, the delivery status should be indicated in the contract.

Uses: Used as welding and riveting structural parts working under vibration load, such as high-pressure blower blades, valve plates and high-speed and high-load shafts, gears, sprockets, clutches, shaft sleeves, bolts, nuts, etc.

60si2mn spring steel60si2mn standard:gb/t 1222-2007

60si2mn characteristics and scope of application:It is a widely used silicon-manganese spring steel with slightly higher strength, elasticity and hardenability than 55si2mn. It is suitable for the production of flat springs with large loads or coil springs with a wire diameter of less than 30mm in the railway vehicle and automobile tractor industry, and is also suitable for the production of heat-resistant springs in non-corrosive media with a working temperature of less than 250 and large and important coiled springs that bear alternating loads and work under high stress.

60Si2mn Chemical Composition:Carbon C:

Silicon si:manganese mn:

Sulfur s:

Phosphorus p:

Chromium cr:

Nickel ni:

Copper cu:

60si2mn Delivery Status:Hot-rolled steel is delivered in heat-treated or non-heat-treated condition, and cold-drawn steel is delivered in heat-treated condition.

60si2mn Main Specifications:60Si2Mn round bar, 60Si2mn rolled bar, 60Si2mn cold drawn bar, 60Si2mn forging bar, 60Si2mn plate, 60Si2mn flat bar, 60Si2mn forging, 60si2mn forging ring, 60si2mn machining parts, 60si2mn pipe, 60si2mn forging cake.

Q345-Low alloy high-strength structural steel, generally not heat treated, directly used.

40cr-alloy structural steel, generally quenched and tempered (quenching + high temperature tempering) heat treatment.

20cr mnti-alloy structural steel, generally carburizing + quenching heat treatment, to obtain higher surface hardness, the core to maintain good impact toughness.

60si2mn-spring steel, quenched to obtain high elasticity.

9CRSI-alloy tool steel, quenched to obtain high hardness.

40cr belongs to quenched and tempered steel.

40cr is used as a connecting rod and bolt on the tractor, and its process route is: blanking, forging, annealing, rough machining, quenching and tempering, finishing machining, and assembly. In the process route, annealing (or normalizing) is used for preparatory heat treatment, the purpose of which is to improve the forging structure, eliminate defects, and refine the grains; Adjust the hardness and facilitate the cutting process; Prepare the tissue for quenching.

The quenching and tempering process uses 830 heating, oil quenching, to obtain martensitic structure, and then tempered at 525, in order to prevent the second type of tempering brittleness, water cooling is used in the cooling process of tempering, and the structure in the final use state is tempered sostenite.

20crmnti belongs to carburized steel.

The processing route of 20crmnti steel gears is: blanking, forging, normalizing, tooth shape, carburizing, pre-cooling and quenching, low temperature tempering, and tooth grinding. Normalizing as a preparatory heat treatment, the purpose of which is to improve the forging structure; The hardness is adjusted (HB170 210) for easy machining, and the normalized structure is soxtenite + ferrite.

The final heat treatment is carburizing and pre-cooling to 875 direct quenching + low temperature tempering, the purpose of pre-cooling is to reduce quenching deformation, and at the same time, in the pre-cooling process, secondary cementite can be precipitated in the seepage layer, which reduces the residual austenite mass after quenching.

60si2mn belongs to spring steel.

60si2mn is formed when quenched and heated, and then quenched + tempered at medium temperature to obtain tempered döchite structure, which has a high yield strength and elastic limit, and has a certain plasticity and toughness.

870 quenching oil, with 500 tempering on it, it is very easy to do.

35Crmnsi Heat Treatment Specification:

1) Quenching: 950 for the first time, 890 for the second time, oil cooled; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

35crmnsia alloy structural steel.

Special Steel: 35crmnsia

Standard: GB T 3077-1988

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

Mechanical Properties: Tensile Strength b (MPa): 1620(165)Yield Strength S (MPa): 1275(130)Elongation δ5 ( 9

Section shrinkage 40

Impact power AKV (J): 31

Impact toughness value kv (j cm2): 39(4)hardness: 241hb

35CRMOA alloy structural steel35CrMo Features:35CrMo (AISI4135) steel is also a CR-MO series alloy structural steel, 35CRMO steel has high lasting strength and creep strength at high temperature, good impact toughness at low temperature, high temperature up to 500, low temperature up to 110, and has high static strength, impact toughness and high fatigue strength, good hardenability, higher hardenability than 40Cr steel, critical quenching diameter in oil is about 16-78mm, no overheating tendency during heat treatment, small quenching deformation, However, there is the first type of tempering brittleness, the plasticity is acceptable when cold deformation, the machinability is medium, the weldability is poor, the preheating needs to be preheated to 150 400 before welding, and the heat treatment after welding is used to eliminate stress, which is generally used after quenching and tempering treatment, and can also be used after quenching or quenching on the high and medium frequency surfaces and tempering at low and medium temperatures.

35CRMO Executive Standard:gb/t 3077-2015

35crmo chemical composition:Carbon C:

Silicon SI:; Manganese mn:;

Chromium cr:Molybdenum mo:;

Nickel Ni: permissible residual content;

Copper Cu: Permissible residual content

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

35CrMo Heat Treatment Specification:Heat treatment specification: quenched 850, oil cooled; Tempered 550, water-cooled, oil-cooled.

35CrMo mechanical properties:Tensile strength b (mpa): 980

Yield strength s (mpa): 835

Elongation δ5 (%12

Section shrinkage 45

Impact power AKV (J): 63

Hardness : 229HB

Specimen size: The specimen blank size is 25mm

35CRMO Applications:It is used to manufacture important parts in various machines that bear impact, bending and torsion, and high loads, such as steel rolling mill herringbone gears, crankshafts, hammer rods, connecting rods, fasteners, steam turbine engine spindles, axles, engine transmission parts, large motor shafts, perforators in petroleum machinery, boiler bolts with a working temperature of less than 400 degrees Celsius, nuts below 510 degrees Celsius, and high-pressure seamless thick-walled conduits for chemical machinery (temperature 450 500 degrees Celsius, no corrosive medium), etc.; It can also replace 40crni for the manufacture of high-load transmission shafts, turbine engine rotors, large-section gears, support shafts (diameter less than 500mm), etc.; Process equipment materials, pipes, welding consumables and so on. It is used as an important structural part working under high loads, such as transmission parts for vehicles and engines; Rotors, spindles, heavy-duty transmission shafts, and large-section parts of steam turbine generators.

35CRMO Main Specifications:35CrMo round bar, 35CrMo rolled bar, 35CrMo forging bar, 35CrMo forging, 35CrMo plate, 35CrMo forging ring, 35CrMo pipe.

35CRMOA is often used for carburizing and quenching. For example, gears, rotors, etc., of course, can also be used after quenching and tempering. However, it is better to use 42crmo for quenching and tempering.

If you need 345crmo, you can contact me! 037-6104-999 YYC.

In order to adjust the internal structure of the steel grain; obtain a more stable rise of noisy austenite and martensite; Reinforcement of material rigidity, toughness and other organizational structures. So as to obtain excellent mechanical properties. You can refer to; Compiled by Huang Shengling, Liaoning University of Technology; Imitate articles published in science and technology;

35Crmnsi Steel Heat Treatment Specification:

1) Quenching: 950 for the first time, 890 for the second time, oil cooled; tempering 230, air-cooled, oil-cooled; 2) 880 is quenched at 280 310 isothermal quenching.

35crmnsia alloy structural steel.

Special Steel: 35crmnsia

Standard: GB T 3077-1988

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulphur content s: Guess Tan residue content is allowed

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

Mechanical Properties: Tensile Strength b (MPa): 1620(165)Yield Strength S (MPa): 1275(130)Elongation δ5 ( 9

Section shrinkage 40

Impact power AKV (J): Sui Lao Tong 31

Impact toughness value kv (j cm2): 39(4)hardness: 241hb