1. Condition:
Work in the sliding bearings, υ Week <2m / S, requires a higher surface hardness of the small axis spindle. Such as machine tool path box, small gear shafts ..
Requirements: 45,50, complex shape shaft 40Cr, 42MnVB. Conditioning, HB228-255, the journal at the high-frequency quenching, HRC45-50
2. Conditions: work in the sliding bearings, υ Week <3m / S, required high hardness, deformation, such as the middle of a small shaft with gear
Requirements: 40Cr, 42MnVB conditioning, HB228-255, journal high frequency quenching, HRC45-50.
3. Condition: υ Week ≥ 2m / S, a large bending load and friction conditions, a small shaft, such as a small machine transmission shaft.
Requirements: 15,20,20 Cr, 20MnVB carburizing, quenching, tempering, HRC58-62.
4. Conditions: high load spline shaft, requiring high strength and wear resistance, deformation
Requirements: 45 high-frequency heating, cooling, low temperature tempering, HRC52-58.
5. Conditions: work in rolling or sliding bearings, light or medium load, low speed, less precision, a slight shock, fatigue, the main axis of the load can be neglected, or work in the rolling bearing, light load, υ <1m / s secondary spline shaft.
Requirements: 45 quenched and tempered, HB225-255 (such as general summary spindle)
6. Conditions: work in rolling or sliding bearings, light or moderate load speed slightly. Ρυ ≤ 150N.m / (cm ^ 2.s), high precision, shock, fatigue load small.
Requirements: 45 normalizing or quenching and tempering, HB228-255, a journal or assembling parts of surface hardening, HRC45-50.
7. Conditions: work in the sliding bearings, or overloading, high speed ρυ ≤ 400N.m/cm ^ 2.S, high precision, shock, fatigue load small.
Requirements: 40Cr quenching, HB228-255 or HB248-286, the journal surface hardening, HRC ≥ 54, the assembly parts of the surface quenching HRC ≥ 45.
8. Condition: Other above, but speed and high accuracy compared with the previous cases, such as the grinding wheel spindle.
Requirements: 45Cr, 42CrMo other above the surface hardness of HRC ≥ 56.
9. Conditions: work in the sliding or rolling bearings, contained, high speed, the center intensity of less demanding, precision is not too high, the impact is not, but the fatigue stress is large, such as grinders, milling machines and other heavy gear spindle.
Requirements: 20Cr carburizing, quenching, tempering, HRC58-62.
10. Conditions: work in the sliding or rolling bearing, heavy duty, high-speed (ρυ ≤ 400N.m/cm ^ 2.s) the impact of fatigue stress are high.
Requirements: 18CrMnTi 20Mn2B 20CrMnMoVA carburizing and tempering HRC ≥ 59.
11. Conditions: sliding bearing in turn, heavy, high-speed, high precision ≤ 0.003mm, high fatigue stress, such as high-precision grinding spindle boring machine.
Requirements: 38CrAlMoA quenched hardness of HB248-286: journal nitriding, the hardness HV ≥ 900.
12. Conditions: the motor shaft, the main torsion.
Requirements: 35 and 45 are fights normalizing or tempering, HB187 and HB217.
13. Conditions: water pump, requiring adequate torsional strength and resistance to corrosion.
Requirements: 3Cr13 and 4Cr13 1000-1050 ℃ oil, the hardness was HRC42 and HRC48.
14. Condition: C616-416 lathe spindle, 45 steel
(1) under alternating bending stress, torsional stress, and sometimes also by the impact load.
(2) big end of the spindle taper and taper at the inner circle, often with the chuck, a relative friction thimble.
(3) take part regularly bump key or relative sliding (4) in the rolling of moving forward, medium speed, medium load.
Requirements:
(1) the overall tone quality of the hardness HB200-230, the microstructure is sorbite.
(2) inside the cone and outer cone surface at the hardness of HRC45-50, the surface microstructure of 3-5mm wind and a small amount for the troostite tempered martensite.
(3) The hardness of the spline part HRC48-53, ibid microstructure
15. Condition: leap -130 type truck (2.5 tons)
Vehicle axle to withstand impact, repeated bending and torsional fatigue, the main transient overloading is broken, require adequate bending, torsion, fatigue strength and good toughness
Requirements: 40Cr 35CrMo 42CrMo40CrMnMo 40Cr quenched after the intermediate frequency surface hardening, the surface hardness of HRC ≥ 52, the depth of 4-6mm, static torque 6900N.m, fatigue ≥ 30 million, life expectancy ≥ 30 万 km microstructure: sorbite + troostite (original and quenched plus high-frequency quenching life expectancy was only 40 000 km)
Second, note:
1. (1-8) Notes:
Spindle and shaft materials and heat treatment selection must take into account the force size, shape and bearing type and spindle defects may be caused by heat treatment. Or journal on the bearing sleeve in the rotary bearing, the journal need not particularly high hardness, available 45,45 Cr, quenched and tempered, HB220-250, 50Mn, normalizing or quenching and tempering HRC28-35. in the work bearing the bearing should be hardened, can be 15,20 Cr, carburizing, quenching and tempering to a hardness of HRC56- 62, the journal at the carburizing depth 0.8-1mm. diameter or larger spindle carburizing weight is difficult, requires deformation is small, the journal is available at 45 or 40Cr for high frequency quenching. high precision and high speed (> 2000r/min) spindle yet to nitriding steel by nitriding treatment, a higher hardness. the heavy work of the large section under the main shaft, available 20SiMnVB or 20CrMnMoVBA, carburizing, quenching, tempering, HRC56-62.
2. (9) Notes:
Inner strength is not high, easily distorted by the force of the surface of high hardness, low load spindle speed should be. Heat a large deformation.
3. (10) Notes:
Ministry of higher heart αk σb and value of high surface hardness and wear resistance. There heat deformation.
4. (11) Notes:
Ministry of high heart strength, high hardness, wear and deformation is small.
5. (12) Notes:
860-880 ℃ normalizing
6. (13) Notes:
Or 1Cr13 1100 ℃ oil quenched ,350-400 ℃ tempered, HRC56-62.
7. (14) Notes:
Processing and heat treatment steps:
→ cutting → forging quenching and normalizing → → → semi-rough finish turning cylindrical, drill the center hole, fine cars cylindrical, keyway milling → cone and cone at the local quenching ,260-300 ℃ tempered → the space vehicle groove, rough grinding at a round, rolling mill spline grooves of the spline → high frequency quenching ,240-260 ℃ plus fire → grinding.
Please send me quote and report delivery time FOB your headquarters, size packing, total weight of merchandise and HS code: Quantity: 2 Description: Roller Bearings 24164 CCW33 ,FAG, SKF Quantity: 2 Roller Bearing 240/600ECA/W33 SKF FAG Quantity: 2 Roller Bearing NU 2252 MAC3 SKF
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