Carbon structural steel must meet both chemical composition and mechanical property requirements. The grade of this type of steel is represented by a two-digit number, which indicates the average carbon content in the steel (in terms of mass fraction, multiplied by 10,000). For example, 45 steel means that the average carbon content is 0.45%, while 08 steel represents a carbon content of 0.08%.
High-quality carbon structural steel is commonly used in manufacturing machine parts. It typically undergoes heat treatment to enhance its mechanical properties, and its applications vary depending on the carbon content. Steels such as 08, 08F, 10, and 10F have high plasticity and toughness, along with excellent cold formability and welding characteristics. They are often cold-rolled into thin sheets for use in cold stamping parts, like instrument casings, car bodies, and tractor cabs.
Steels like 15, 20, and 25 are suitable for small, lightly loaded carburized components where surface hardness is important but the core strength doesn’t need to be very high, such as piston pins or prototypes. Steels with medium carbon content—like 30, 35, 40, 45, and 50—are known for their balanced mechanical properties after heat treatment (quenching and high-temperature tempering), offering good strength, ductility, and toughness. These are commonly used for shaft components, including crankshafts, connecting rods, and gear spindles in automobiles and machinery.
Finally, steels with higher carbon content, such as 55, 60, and 65, are heat-treated (quenching followed by medium-temperature tempering) to achieve a high elastic limit. They are ideal for producing small springs under light loads, such as pressure regulators, speed control springs, plunger springs, and cold-formed coil springs. These materials are essential in various mechanical systems where durability and resilience are key factors.
1. Components of piston rod seal:
Polyurethane, polyformaldehyde, rubber
2. Purpose and function of piston rod seal:
The rod seal belongs to the dynamic seal. It is the seal that moves with the piston rod. It is one of the important components on the hydraulic support.
3. Use position of piston rod seal:
Guide sleeve, piston
4. Working principle of piston rod seal:
It is used at the contact part between the guide sleeve and the outer cylinder to seal the emulsion in the outer cylinder.
5. What effects will be caused by improper use or operation of piston rod seal:
1. Improper selection of cavity support material will wear the cavity and piston rod.
2. The size of the friction pair is inappropriate, causing wear.
3. Improper thread guide angle of cylinder barrel and piston end wear the sealing ring.
4. The seal ring is worn due to improper installation guide angle of the seal.
5. The surface of cavity and piston rod is rough, with scratches and worn seals.
6. The outer cylinder leaks and the jack does not maintain pressure.
Piston Rod Seal,Hydraulic Cylinder Rod Seal,Pneumatic Rod Seal,U Ring Seals,Hydraulic Seals
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