Group: User
Level: Frischling
Posts: 4
Joined: 1/3/2025
IP-Address: saved
|
Surface Roughness: Refers to the vertical deviation of a surface's micro-geometric shape, typically composed of high-frequency, short-wavelength components. It reflects microscopic features such as tool marks and material removal methods during machining. For example, the surface roughness after CNC milling can be quantified using parameters (e.g., Ra, Rz), which directly affect a part's friction, sealing performance, and fatigue strength.
Surface Texture: A broader concept encompassing three hierarchical levels: roughness, waviness, and form error. Texture includes not only microscopic undulations but also macro-geometric features with medium-to-long wavelengths (e.g., periodic patterns left by machining). It influences comprehensive performance metrics such as optical reflection and fluid flow.
Measurement Methods and Technical Comparisons
Roughness Measurement: Commonly employs contact profilometers (e.g., stylus scanning) or non-contact methods (e.g., laser speckle, microwave reflection). For instance, portable roughness testers can rapidly acquire Ra values, making them suitable for workshop environments.
Texture Analysis: Requires 3D measurement techniques (e.g., white-light interferometry, atomic force microscopy) to capture complex geometric features. For example, when studying oxidation-induced crack behavior on alloy surfaces, simultaneous analysis of roughness and texture distribution is essential.
|
Search 
Calendar 
Gallery
Auctions 
Global 
Top
Members 
Stats
Chat (0) new 
send Password 
Register
