Wear Resistance Of Precision Steel Shafts

2025-09-11

The wear resistance of precision steel shafts is a critical performance indicator that directly determines their service life, operational stability, and reliability in high-precision applications. Here is a detailed analysis of the factors, mechanisms, and enhancements related to their wear resistance: 1. Factors influencing wear resistance Material selection High-carbon chromium steel (e.g., SUJ2/GCr15): Widely used for its high hardenability and ability to achieve hardness up to HRC 60–62 after heat treatment. Stainless steel (e.g., SUS440C, SUS304): Offers corrosion resistance alongside moderate wear resistance (hardness up to HRC 58–60 for martensitic grades). Case-hardened steels (e.g., 20Cr, 20CrMnTi): Surface hardening via carburizing or nitriding creates a wear-resistant layer (≥ HRC 58) while maintaining a tough core. Surface Hardness Hardness is directly correlated with wear resistance. Precision steel shafts typically require a surface hardness of ≥ HRC 58 to resist abrasive wear. Techniques like induction hardening or chrome plating (900–1,200 HV) further enhance surface hardness. Surface finish A smooth surface (Ra ≤ 0.2 μm) reduces friction and minimizes adhesive wear. Precision grinding and polishing eliminate micro-asperities that could accel...

Core Characteristics Of Chrome-Plated Smooth Shafts

2025-09-11

The core characteristics of chrome-plated smooth shafts are reflected in five aspects: corrosion resistance, wear resistance, high strength, high precision, and functional diversity. A detailed analysis is as follows: 1. Corrosion resistance: Dense protective layer of hard chromium plating The chrome-plated smooth shaft undergoes an electroplating process to form a hard chromium layer on its surface. This layer exhibits extremely high chemical stability, effectively isolating corrosive media such as oxygen, moisture, and salt spray in the air. For example, in marine platforms or chemical equipment, chrome-plated smooth shafts can be exposed to humid, salty, or chemically corrosive environments for extended periods without rusting, significantly extending their service life. This characteristic makes them the preferred material for harsh environments, such as ship rudder systems and lifting mechanisms on offshore drilling platforms. 2. Wear resistance: High hardness of chromium layer reduces friction loss The hardness of the hard chromium layer can exceed 900 HV, far higher than that of ordinary steel (e.g., 45# steel has a hardness of about 200 HV). This high hardness enables chrome-plated smooth shafts to perform exceptionally well under friction and wear, making them particularly suitable fo...

Brief Description Of Stainless Steel Linear Smooth Shafts

2025-09-11

1. Stainless steel linear smooth shaft (SF): Due to the point-to-surface contact between the stainless steel linear smooth shaft and the linear sliding ring, the surface hardness requirements for ordinary linear smooth shafts are very high. Therefore, the material and heat treatment methods are critical. Material: SUJ2 (equivalent to Chinese standard GCr15). Hardness: HRC60 ± 2. Hardened layer depth: 0.8–3 mm. Surface roughness: Ra 0.10 μm – Ra 0.35 μm. Straightness: ≤ 70 μm / 1000 mm. Shaft outer diameter tolerance: g6. 2. Chrome-plated linear smooth shaft (SFC): The chrome-plated linear smooth shaft is coated with a layer of hard chromium on the basis of an ordinary linear smooth shaft, making it suitable for rust-prone or harsh environments. This shaft is widely used in industrial robots and the moving parts of automatic sliding systems. Material: SUJ2 (equivalent to Chinese standard GCr15). Hardness: HRC60 ± 2. Hardened layer depth: 0.8–3 mm. Surface roughness: Ra 0.10 μm – Ra 0.35 μm. Straightness: ≤ 70 μm / 1000 mm. Chrome plating thickness: 3 μm – 5 μm. Shaft outer diameter tolerance: g6. 3. Stainless steel linear smooth shaft (RSFC): The chrome-plated linear soft shaft can be directly used for pre...

Core Structure Of The Hydraulic Oil Cylinder

2025-09-11

The core structure of a hydraulic oil cylinder can be divided into five main components. 1. Cylinder barrel Function: The cylinder barrel is the main body of the hydraulic oil cylinder. It forms the internal pressure chamber and bears the main working pressure. Characteristics: Typically made of high-strength seamless steel tubes. The inner bore surface requires precision machining, such as honing or rolling, to achieve high dimensional accuracy, geometric precision (e.g., straightness, roundness), and very low surface roughness. This ensures the reliability and service life of the sealing components. It must have sufficient strength and stiffness to withstand system pressure without bursting or excessive expansion. 2. Piston assembly Piston: Installed inside the cylinder barrel, it divides the internal space into two sealed chambers (rod side and blind side). It moves back and forth in a straight line under the push of hydraulic oil. The piston is equipped with piston seals (e.g., Glyd rings, Step seals, U-cups) to prevent leakage of pressure oil between the two chambers (internal leakage). Piston Rod: One end is connected to the piston, and the other end extends outside the cylinder barrel to connect to the load mechanism. It transmits the thrust force of the piston to the external...

What Are The Structural Components Of A Hydraulic Cylinder Body

2025-09-11

The structure of a hydraulic cylinder usually includes the following parts: Cylinder: The main body of a hydraulic cylinder, which is a hollow cylindrical structure used to accommodate pistons and hydraulic oil. Cylinder head: a component that seals one end of a cylinder, usually connected to the cylinder by bolts or welding, used to fix the piston rod and prevent hydraulic oil leakage. Piston: A component that performs reciprocating motion inside a cylinder, usually connected to a piston rod, converting hydraulic energy into mechanical energy. Piston rod: a component that connects the piston and external load, used to transmit force. Sealing device: including piston seal, piston rod seal, etc., used to prevent hydraulic oil leakage and external impurities from entering the hydraulic cylinder body. Buffer device and exhaust device: The buffer device is used to reduce the impact force when the piston reaches the end point and protect the hydraulic cylinder body; The exhaust device is used to eliminate the air inside the hydraulic cylinder body, ensuring the normal operation of the hydraulic system....

Chemical Composition And Manufacturing Process Of Pneumatic Cylinder Tube

2025-09-11

Pneumatic cylinder tube (cylinder tube) is a high-precision seamless steel pipe material, and its chemical composition and manufacturing process have a decisive impact on its performance. The following is a detailed introduction: 1、 Chemical composition The chemical composition of pneumatic cylinder tubes mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), chromium (Cr), etc. These elements each play an important role in steel pipes: Carbon (C): Increases the strength and hardness of steel pipes, but excessive carbon content can reduce their plasticity and toughness. Silicon (Si): improves the elasticity and heat resistance of steel pipes, while also aiding in deoxidation. Manganese (Mn): enhances the strength and hardness of steel pipes, while improving their cold working performance. Sulfur (S) and phosphorus (P): These two elements are often considered harmful in steel pipes because they reduce the plasticity and toughness of the pipes and increase brittleness. Therefore, in the manufacturing process of pneumatic cylinder tubes, it is necessary to strictly control the content of sulfur and phosphorus. Chromium (Cr): improves the corrosion resistance and oxidation resistance of steel pipes, while also helping to form a dense oxide film to p...

Characteristics Of Rolled Cylinder Tubes

2025-09-11

Rolled cylinder tubes are manufactured through a chipless cold-working process known as roller burnishing. This method uses high-pressure hardened rollers or balls to plastically deform the inner surface of the tube, resulting in significant improvements in performance and durability. The characteristics of rolled cylinder tubes can be categorized into advantages and limitations: 1. Key advantages Exceptional surface quality Ultra-low surface roughness: Achieves a mirror-like finish with surface roughness typically ranging from Ra 0.1 to 0.4 μm, and can reach as low as Ra 0.05 μm under optimal conditions. Smooth and uniform surface: Eliminates tool marks and micro-irregularities from pre-machining through plastic deformation, resulting in a consistent and smooth surface. Enhanced mechanical properties Surface hardening: Cold working induces strain hardening, increasing surface hardness by 15%–30%. Compressive residual stress: Introduces a layer of uniform compressive residual stress on the surface, significantly improving fatigue strength and resistance to stress corrosion cracking, thereby extending service life. Improved wear resistance: The combination of increased hardness and smooth surface reduces friction and enhances wear resistance. High dimensional and geometrical accu...

The Machining Principle Of Honed Cylinder Tube

2025-09-11

The machining principle of honed cylinder tubes is based on micro-cutting achieved through a combined rotational and reciprocating motion of the honing tool. This process utilizes abrasive stones mounted on a honing head to interact with the inner surface of the workpiece, forming a cross-hatched pattern that improves geometric accuracy and reduces surface roughness. The following sections detail the core principles and mechanisms involved: I. Basic Motion Mechanism The honing head drives abrasive stones (honing sticks) to perform two simultaneous motions: Rotational Motion: The honing head rotates around its axis, generating circumferential cutting traces. Reciprocating Motion: The honing head moves axially back and forth, producing linear cutting traces. Combined Effect: The superposition of these motions creates a cross-hatched pattern with a typical angle of 30°–60° (adjustable based on requirements). This pattern enhances oil retention, reduces friction, and improves wear resistance. II. Material Removal Mechanism Micro-Cutting Action: Abrasive grains remove material at a micron-level depth, ensuring minimal heat generation and avoiding thermal damage to the workpiece. The large contact area between the abrasive stones and the bore wall results in low unit pressure (typ...