Product Description
Steel Hard Chrome Plated Rods are precision transmission components made from high-quality carbon structural steel or alloy steel as the base material, with a hard chrome layer electroplated onto the surface. The product combines a high-strength base material with an extremely hard surface, specifically designed for high-precision, high-load motion systems such as hydraulic/pneumatic cylinder piston rods and linear guides.
Details
Available Rod Diameters: 8mm to 125mm (standard); larger diameters are available upon request.
Available Lengths: 3 meters to 6 meters (standard); longer lengths are available per customer requirements.
Supply Conditions: Full-length rods and customized lengths are available per customer requests.
Specifications
Product Name: Steel Hard Chrome Plated Rod
Material: C45E, C35E, 20MnV6, 38MnVS6, 42CrMo4
Size: 6 – 160mm
Tolerance: ISO f7
Roundness: Maximum 1/2 of the diameter
Length: 5000 – 7500 mm
Surface Roughness: Ra: maximum 0.20 microns
Plating Thickness: < 20mm: minimum 15 μm; ≥ 20mm: minimum 20 μm
Microhardness: Minimum 900 HV0.1
Straightness: 0.3 – 0.2 mm/m
Manufacturing Process
1. Raw Material Preparation: Select high-quality round steel.
2. Heat Treatment: The steel is quenched and tempered at high temperature to obtain uniform and tough core properties.
3. Rough Machining and Precision Grinding: Through turning and precision grinding, the steel rod achieves precise dimensional tolerances and a high surface finish (laying the foundation for electroplating).
4. Hard Chrome Plating: After thorough cleaning and activation, a hard chrome layer of a specified thickness is electroplated onto the surface of the steel rod.
5. Post-Plating Finishing: (This is a crucial step) The chrome-plated surface is ultra-precision ground and polished to achieve the final mirror-like finish and precise dimensions.
6. Cleaning and Inspection: After thorough cleaning, various quality inspections are performed.
Main Features
1. Hard Chrome Plating: The hardness of the hard chrome layer is typically in the range of HV 800-1000, making the piston rod surface extremely wear-resistant and reducing damage caused by friction.
2. High Wear Resistance: Due to the wear resistance of the hard chrome plating, steel hard chrome piston rods can withstand high friction for extended periods, suitable for high-speed operation or heavy-duty working environments.
3. Corrosion Resistance: The hard chrome layer effectively resists oxidation, chemical corrosion, and moisture in the environment, making it suitable for harsh working conditions.
4. Smooth Surface: The surface treated with hard chrome is very smooth, reducing friction and improving the operating efficiency and precision of the mechanical system.
5. High Strength and Fatigue Resistance: The base material is usually alloy steel or high-strength steel, possessing extremely high tensile strength and fatigue resistance, suitable for bearing heavy loads and high-pressure environments.
Application Areas
1. Hydraulic and Pneumatic Systems: It is a commonly used material for piston rods in hydraulic and pneumatic cylinders, and can also be used for pump shafts and other components.
2. Construction Machinery: Used in the hydraulic systems of equipment such as excavators, loaders, and cranes to transmit power and achieve linear motion.
3. Plastic Machinery: Plays a role in the clamping mechanism and ejection mechanism of injection molding machines.
4. Other Fields: It is also widely used in textile machinery, printing machinery, automated production lines, and other equipment requiring high-precision linear motion.
FAQ
1. How to clean and maintain a hard chrome plated piston rod?
Avoid using strong acid or alkaline cleaning agents. Use a neutral detergent and a soft cloth to wipe the surface, keeping the piston rod surface clean and smooth.
2. Is the hard chrome plating prone to peeling off?
Under normal operating conditions, the hard chrome layer is very durable and not easily peeled off. However, the plating may be damaged if subjected to mechanical impact or extreme corrosive environments.
3. How to prevent wear on the hard chrome surface?
Avoid prolonged contact of the piston rod with other metals or rough surfaces, and pay attention to preventing contaminants from entering the system to avoid wear.
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