Re: nhờ mấy pro vật liệu giới thiệu về vật liệu Carbide!
Gới QuyenQMC tài liệu tiếng Anh về carbide nè
ALL ABOUT CARBIDE
TECHNICAL INFORMATION
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CARBIDE PRODUCTION
• Carbide powders are created by heating metal powders, usually tungsten, and carbon to a very high temperature - over 2800ºF
• Resultant tungsten carbide powder grains are extremely hard and stable at elevated temperatures
• These carbide powders are sorted by grain size and recombined in appropriate ratios to achieve specified physical properties
• Cobalt metal powders are thoroughly mixed with the tungsten powders and forced under high pressure (30,000 psi) into multicavity molds of the desired shape and size
• Carbide rounds are made with an extrusion process
• Carbide blanks are low temperature pre-sintered to develop sufficient physical strength for handling
• Finally, the carbide blank is high temperature sintered at 2500ºF to 2900ºF; a dramatic shrinkage of almost 40% volume occurs as the carbide blank internally pulls together, resulting in an extremely dense & hard material
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CARBIDE TECHNICAL
• Types of Carbide Powders
o Tungsten Carbide (WC) - Primary carbide component
o Titanium Carbide (TiC) - Added to increase resistance to abrasive wear or cratering of chip forming surface
o Tantalum Carbide (TaC) - Added to increase resistance to cutting edge deformation at higher temperatures during heavy cuts
• Cobalt binder is a major factor in determining the carbide's hardness and toughness (see upper right graph)
thế trong 4 loại này thì thằng nào có thể khoan đá,thạch anh,cát sỏi là tốt nhất
vấn đề này sẽ trả lời sau nha
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