Commonly Used Metallographic Inspection Standards Metallographic inspection standards began to actively adopt international standards in the 1980s, and it was not until 2010 that they really began to participate in the formulation and revision of international standards in this field. At present, ... Read More

Metallographic Inspection Helps Machinery Industry Metallographic inspection is to observe the internal structure of metal machinery parts through various metallographic means, and conduct qualitative, semi-quantitative or quantitative inspections on grain size, shape, type, microstructure, relative ... Read More

Metallographic Inspection and Evaluation of Quenched and Tempered Structure High-strength bolts should ensure that they are fully austenitized during quenching, the quenched structure is uniform, and there is no undissolved ferrite and non-martensite structure. The metallographic inspection of the ... Read More

Metallographic Inspection of Fastener Bolts after Quenching and Tempering High-strength bolts have good comprehensive mechanical properties and high toughness after quenching and tempering (quenching and high-temperature tempering). Commonly used steels are low-carbon and medium-carbon high-quality ... Read More

Metallographic Sample Preparation Example The metallographic sample preparation example shared this time is EN-AW-5083 aluminum alloy sample. The three samples sent by the customer are cut into 30mm*30mm cuboids by iqualitrol iCut-460Z automatic precision cutting machine, two each for hardness ... Read More

Annealing Treatment of Cold Heading Wire for Fasteners Annealing Process Control Points: (1) Full annealing requires heating to 28 ℃ above Ac3, carbon steel should be 30-50 ℃ above Ac3, and alloy structural steel should be 50-80 ℃ above Ac3. (2) Spheroidizing annealing: medium carbon steel and low ... Read More

Fundamental Parameters of Optics The following list includes the fundamental parameters that must be evaluated in optics: Field of View (FoV): total area that can be viewed by the lens and imaged onto the camera sensor. Working distance (WD): object to lens distance where the image is at its ... Read More

Determination and Control of Spheroidizing Annealing Structure of Low and Medium Carbon Steel For most fastener products (bolts, screws, studs, rivets, etc.), soft annealing or spheroidizing annealing is required. Spheroidizing annealing is a process method to obtain fine-grained (spherical) ... Read More

Optical Terminology for Profile Projectors The profile projector uses non-contact measurement method. It can observe tiny parts and easily deformed parts that are difficult to detect with contact measurement. It can also detect the contour size and surface shape of various complex workpieces, such ... Read More

Hardness Testing in Cold-rolled Thin Steel Plates Hardness tester in cold-rolled thin steel plate and steel strip hardness detection and application Cold-rolled thin steel plate, referred to as cold-rolled steel plate, cold-rolled thin plate, cold-rolled plate, cold plate, etc. It also includes ... Read More