Monolithic steel piston + phosphating
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Product Description
High-strength, high-temperature-resistant material
Select appropriate materials based on the type of internal combustion engine to ensure stability under extreme operating conditions.
★ Aluminum Alloy Pistons (accounting for over 80%): Made from heat-resistant aluminum alloys such as ZL109 and ADC12, these pistons undergo T6 heat treatment (solution treatment + artificial aging), achieving a tensile strength of ≥300 MPa and a heat resistance up to 350–400°C. They are ideal for gasoline engines and lightweight diesel engines—such as those used in passenger vehicles and small construction machinery.
★ Cast Iron / Steel Pistons: Made from ductile cast iron (QT600-3) or alloy structural steel (40Cr), these pistons offer a tensile strength of ≥600 MPa, withstand heat temperatures up to 500–600°C, and exhibit excellent impact resistance—making them ideal for heavy-duty diesel engines such as those used in commercial vehicles, marine propulsion systems, and generator sets.
Precision manufacturing process
Product performance is ensured through multiple high-precision manufacturing processes:
★ Forming Process: Utilizing metal die casting (for aluminum alloy pistons) or forging (for steel pistons) to ensure high blank density (porosity ≤2%);
★ Precision Machining: Key surfaces (skirt, pin holes, ring grooves) are machined using CNC lathes and honing machines, with dimensional tolerances held within ±0.005mm.
★ Surface Enhancement: The groove surface is either chrome-plated (5–10 μm thick) or laser-clad, achieving a hardness of HV800 or higher; the skirt area features a spray-applied graphite/molybdenum-based coating to reduce friction and wear.
High-efficiency sealing and oil-control design
★ Groove Optimization: Utilizing either an "inclined groove" or a "stepped groove" design to minimize the impact between the piston ring and groove walls, thereby reducing blow-by rates to ≤0.5%.
★ Oil ring adaptation: Designed with a "double scraper blade + backing spring" structure tailored for the oil ring groove, enhancing oil-scraping efficiency. This ensures that oil consumption remains below 0.1 g/kWh—meeting China VI/Euro VI emission standards.
Fatigue Resistance and Thermal Management Optimization
★ Structural Reinforcement: Strengthening ribs are strategically placed around the piston pin holes and at the skirt transitions to reduce stress concentrations (maximum stress ≤ 200 MPa), ensuring a fatigue life of over 10,000 hours.
★ Thermal Design: Some high-power pistons feature a built-in "cooling oil chamber" that circulates engine oil to dissipate heat, reducing the piston top temperature by 30–50°C and preventing localized overheating and cracking.
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CHINA. ZHUJIAZHUANG VILLAGE, NORTH OF SUJIAZHUANG, NINGJIN COUNTY, HEBEI PROVINCE