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Introduction 40Cr and 42CrMo are two mainstream medium-carbon quenched & tempered alloy structural steels widely adopted in automotive, machinery, construction machinery and new energy equipment. Engineers frequently struggle with material substitution between them; improper downgrade replacement ... Read More
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Introduction Passivation is a core surface finishing technology widely adopted for stainless steel, galvanized steel, aluminum alloy, copper and silver components across machinery, medical, food, automotive, electronics and aerospace industries. Though all named “passivation”, the film formation ... Read More
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20CrMnTi is a widely used medium-hardenability low-carbon alloy carburizing steel specified under GB/T 3077, dominating the manufacturing of automotive and construction machinery transmission components. After carburizing, quenching and low-temperature tempering, it achieves a hard wear-resistant ... Read More
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Many maintenance teams jump to the conclusion of insufficient gear hardness when spotting scattered pits on gear tooth flanks shortly after reducer commissioning. During equipment disassembly reviews, inspectors often first pull out heat treatment reports. Even if surface hardness fully complies ... Read More
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Industry Technical Article Nitriding is a mainstream surface strengthening process for transmission gears, which can significantly improve the surface hardness, wear resistance and contact fatigue performance of gears while controlling dimensional deformation. Nevertheless, improper pre-heat ... Read More
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Gear Assembly Specifications & Inspection Standards Gearboxes (speed increasers & reducers) are widely applied in industrial equipment for their high transmission efficiency, yet their assembly requires strict technical control. Improper assembly leads to abnormal noise, impact, jamming and ... Read More
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Tempering Transformation of Steel 1. Definition of Steel Tempering Tempering is an essential post-quenching heat treatment process for steel. It refers to reheating quenched martensitic steel to a temperature below the eutectoid critical point A₁, holding the temperature for a certain duration, then ... Read More
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Nowadays, numerous software tools can directly generate 3D drawings with great ease. For gears other than highly customized special types, creating drawings is no longer a tough task. Nevertheless, gear parameter calculation and selection still rely on professional design engineers. Incorrect ... Read More
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Local black discoloration occurring after stainless steel passivation shows uneven color difference in appearance. Main morphologies include patch shape, stripe shape and dot shape without metallic luster. The passivation film within black areas completely fails, and its corrosion rate is more than ... Read More
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Industry Knowledge Blog Articles for Independent Website (Film Gripper Chain) Article 1: How to Select Correct Film Gripper Chain: Simple Type VS Toothed Type Introduction Film gripper chain is the core transmission part of thermoforming, vacuum packaging and VFFS packaging machines. Improper chain ... Read More
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