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Advantages of Hardness Test in Application 1) When testing hardness, the stress state of its loading mode is the softest (a>2), that is, the maximum shear stress is much greater than the maximum normal stress. Any metal material will undergo plastic deformation under this stress state, and the ... Read More
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Ductile Fracture of Metal Materials There are many ways for engineering materials to fail, and fracture is one of them. Other failure modes include deformation, wear, corrosion, etc. Fracture failure is the most dangerous and often causes casualties or major economic losses. Fracture is also divided ... Read More
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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
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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
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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
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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
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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
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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
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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
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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
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