Hardness of Carbon Materials The hardness of carbon materials mainly depends on the type of material and the final heat treatment temperature. There are many measurement methods, including Mohs, Brinell, Rockwell and Shore hardness measurement methods. Artificial graphite: a product made from ... Read More

Heat Treatment and Hardness The hardness of metal materials has a certain empirical relationship with their static strength and fatigue strength, and is related to the processing performance of metals such as cold formability, machinability and weldability. The hardness test does not damage the ... Read More

Hardness Test of Welded Parts Welding is an indispensable common basic technology in the manufacturing industry. Since the formation process of the welded joint (weld) involves heat, stress and microstructural changes, it often becomes a weak link in the welded structure. Especially when there is a ... Read More

Ceramic Material Hardness Test Method The hardness of ceramics is a relatively wide range, which varies due to its material composition, preparation process and microstructure. Generally speaking, the hardness of ceramics is between 6.5 and 9.0 on the Mohs hardness scale. Special ceramics such as ... Read More

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