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hunan neptune pump

What is the best material for the multistage pump long shaft

Source:未知|Popularity:0|release date:2020-04-01 15:21:43
There are many types of multistage pump shaft materials, such as: 45 #, 40Cr, 42CrMo, 2Cr13, 17-4PH, 2507 and so on.
The selection of the pump shaft material is generally based on the working conditions of the pump. If it is clean water, then we will choose a conventional 45 # steel material to meet the user's requirements.

Material characteristics:
45 # is a steel grade that is a high-quality carbon structural steel, corresponding to Japanese standard S45C, American standard: 1045, German standard C45. It is characterized by higher strength and resistance to deformation than ordinary A3 steel.

45 # steel is widely used in machinery, when not heat treated: HB≤229; heat treatment: normalizing; impact energy: Aku≥39J; high strength, good plasticity and toughness, 45 # steel plate is not hardened before tempering after quenching, hardness is greater than HRC55 (Up to HRC62) is qualified. After heat treatment, then tempering can reach HRC42-46. This can not only ensure its good mechanical properties, but also obtain the surface hardness requirements. It is used to make small cross-section adjustments with large load. Quality parts and large normalized parts with less stress, as well as surface-hardened parts that do not require high core strength, such as shafts, pins, guide posts, needles and other parts.

If the user has requirements for the impact resistance of the material, then we can choose 40Cr.
Material characteristics: 40Cr is the standard steel grade of GB in China, and 40Cr steel is one of the most widely used steels in machinery manufacturing. After quenched and tempered, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. Hardenability of steel is good, this steel is suitable for making medium-sized plastic molds. After 40Cr quenched and tempered, the hardness is about 32-36HRC, that is, about 301-340HB.

Medium carbon quenched and tempered steel, cold heading die steel. The steel is moderately priced and easy to process. After proper heat treatment, certain toughness, plasticity and wear resistance can be obtained. Normalizing can promote the refinement of the structure and approach the equilibrium state, which can improve the cutting performance of the blank. Tempered at a temperature of 550 ~ 570 ℃, the steel has the best comprehensive mechanical properties. The hardenability of this steel is higher than that of 45 steel, which is suitable for surface hardening treatment such as induction hardening and flame hardening.

Uses: This steel is used for manufacturing mechanical parts subjected to medium load and medium speed after quenching and tempering, such as steering knuckles, rear axles, and gears, shafts, worms, spline shafts, and top sleeves on machine tools;
After quenching and tempering at medium temperature, it is used to manufacture parts that are subjected to high load, impact and medium speed work, such as gears, spindles, oil pump rotors, sliders, collars, etc .;

After quenching and low temperature tempering, it is used to manufacture parts that bear heavy load, low impact and wear resistance, and the solid thickness on the cross section is less than 25mm, such as worm, spindle, shaft, collar, etc .;

After quenching and tempering and high frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance without great impact, such as gears, sleeves, shafts, spindles, crankshafts, spindles, pins, connecting rods, Screws, nuts, intake valves, etc.

In addition, this steel is also suitable for manufacturing various transmission parts for carbonitriding, such as gears and shafts with large diameters and good low temperature toughness.

40Cr shaft parts
Shaft parts are one of the typical parts often encountered in machines. It is mainly used to support transmission parts, transmit torque and bear loads. Shaft parts are rotating parts, whose length is greater than the diameter. They are generally composed of the outer cylindrical surface, conical surface, inner hole and thread of the concentric shaft and the corresponding end surface. According to different structural shapes, shaft parts can be divided into optical axis, stepped shaft, hollow shaft and crankshaft.