DATONG GROUP/ cylinder barrel inspection before shipment/ honed barrel/h...

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What is the process of hard chrome plating?

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  Hard chrome plating   is a process in which a layer of chromium is applied to a surface to improve corrosion and abrasion resistance, reduce friction, and extend the life of parts used in extreme wear conditions. Hard chrome plating demonstrates excellent hardness and lubricity, and is the premier engineering choice to reduce friction, minimize wear and prevent galling. These characteristics are applicable for critical engineering applications, including: machine tool cutting surfaces, cylinder bores, strut rods, crankshafts and  hydraulic shafts . Hard chrome is also applied to molds because of its low surface energy and resultant release properties. Chem Processing can hard chrome plate steel, aluminum, or copper materials, as well as many exotic alloys. Hydraulic cylinder rods , bearing fits and seal areas frequently get damaged and worn from heavy use. When no longer functional, a part can be hard chrome plated and polished or ground back to OEM Spec. This process c...
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The Induction Hardening Of AISI 4140 Chrome Bar

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 As we all know , When the specific pressure in service is very high or there is a risk to damage the chromium plated surface by shocks or abrasions, it is advisable to use the induction hardened AISI 4140 chrome bars . In this case the chromium overlay receives a better support by the hardened base material and is, therefore, less delicate. Why Induction Hardening? Our controlled induction hardening process ensures: Targeted Hardening: Only the working surface is hardened (HRC 58-62), preserving core ductility. Uniform Case Depth: Precise electromagnetic induction achieves consistent case depth (0.8–1.2 mm), mitigating distortion risks. Thermal Efficiency: Faster than traditional furnaces, with minimal decarburization. The Technical of AISI 4140 Chrome bars Material Composition & Performance. 4140 Alloy Steel: A chromium-molybdenum steel (0.75–1.00% Cr, 0.15–0.30% Mo) offering exceptional tensile strength (≥980 MPa) and torsional rigidity. Chrome Plating: A 50-100 µm thick chr...
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The Manufacturing Process Of Inside Precision Skiving Tubes

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  Precision Skiving Tubes   are made from heat treatment of cold drawn, and then skived and roller burnished. They usually can be used for manufacturing   custom hydraulic cylinder   especially for big bore size.Skiving and roller burnishing is finishing method that does not remove the material in the form of chips, but rather transforms the surface layer. Precision skiving tubes from DATONG HYDRAULIC are made of ST52.3 BK+S (E355SR) material – with standard of DIN2391, low-carbon steel grade with guaranteed weldability.  The manufacturing Process Of Precision Skived roller burnished tubes Seamless hot rolled hollows are obtained with controlled concentricity on an  rolling line and then drawn to precision tubes with significant cross-section reduction improving the geometry and strengthens of the tubes. The cold deformed tubes are then Inside skived and roller burnished (SRB) using state of the art equipment and tools supplied by well-known producers with ...
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