What is hard chrome plated piston rod?

The hard chrome plated hydraulic piston rod is a connecting component that is usually used in the motion execution components of oil cylinders, air cylinders and hydraulic cylinders to support the work of the piston. The chrome plated piston rod is usually made of chrome plated bar.

Chrome Plated Steel Rods-CK45 chrome bar

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We manufacturer and supply full size range of chrome plated rods, hardened chrome plated bars with material CK45, SAE 1045, 4140, 27SiMn and so on.

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Main types of Chrome plated piston rods

How to produce the chrome plated piston rods

The chrome plated piston rod is processed by hot rolling or cold rolling, grinding, polishing and chrome plating. Because the surface layer has residual compressive stress on the surface, which helps to seal the tiny cracks on the surface and hinders the expansion of erosion. Therefore, the corrosion resistance of the surface can be improved, and the generation or expansion of fatigue cracks can be delayed, thereby improving the fatigue strength of the cylinder rod.

Through roll forming, a cold work hardening layer is formed on the surface of the chromed piston rod, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the surface of the cylinder rod and avoiding burns caused by grinding. After rolling, the surface roughness value of the chrome piston rod is reduced, which can improve the fitting properties. At the same time, the friction damage to the seal ring or the seal when the cylinder rod and piston moves is reduced, and the overall service life of the oil cylinder is improved.

The rolling process is a high-efficiency and high-quality process measure. Now, the rolling effect is proved by taking the 160mn diameter mirror doctor brand cutting rolling head (CK45 chrome plated hollow bar) as an example. After rolling, the surface roughness of the cylinder rod is reduced from Ra3.2-6.3um before rolling to Ra0.4-0.8um, the surface hardness of the cylinder rod is increased by about 30%, and the surface fatigue strength of the cylinder rod is increased by 25%. It is increased by 2-3 times, and the rolling process is about 15 times more efficient than the grinding process. The above data shows that the rolling process is efficient and can greatly improve the surface quality of the cylinder rod.

Applications of the Chromed Piston rods

Since the main function of the chrome plated piston rod is to transmit torque and bear loads, it can be used in various mechanical systems with linear reciprocating motion. For example, it is more suitable for various types of hydraulic cylinders, air pneumatic cylinders, construction machinery, packaging machinery, woodworking machinery, conveying machinery, textile machinery, printing and dyeing machinery, die-casting machines, injection molding machines, automobile manufacturing and other machinery guide rods, top rod, etc.

What is hard chrome plating?

Industrial Hard chrome plating is an electroplating process in which chromium is deposited from a chromic acid solution. Thickness of hard chrome plating ranges from 2 to 250µm. Various types of hard chrome include micro-cracked chromium, micro-porous chromium, porous chromium and crack free chromium.

What is the benefit of hard chrome plating?

Chrome plating increases the hardness, durability, and corrosion resistance of a surface, while also creating a shiny and smooth surface that is easier to clean.

For improved wear and corrosion resistance, it’s tough to beat hard chrome plating. The hardness and durability of a chromium metal surface finish means your parts will last longer even under severe mechanical contact and wear situations. A chrome surface also resists corrosion, making it suitable for use in harsh environments or where other plating materials would wear away, exposing the substrate metal to corrosion attack.

The most popular and important application of industrial hard chrome plating is hard chrome plated shafts for Hydraulic cylinders and piston rods.

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