Search results for keyword: nodule
Alloy steel castings (JB/ZQ4297-1986)
Introduction
Alloy steel casting is a specialized form of casting that uses various kinds of alloys such as iron, carbon, silicon, nickel, etc. to create cast shaped products with enhanced mechanical properties and corrosion resistance. Alloy steel casting is widely used in automotive and machine......
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Grades and mechanical properties of gray cast iron
Gray cast iron is a type of iron which is predominantly composed of the element carbon. It is significantly harder than wrought iron and can be used for many applications. It is a very common material and is used in everything from engine parts to furniture.
The mechanical properties of gray cast......
Hardness grade, hardness range and metallographic structure of ductile iron
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Introduction
Ductile iron (also known as spheroidal graphite iron, abbreviated SG Iron or SG) is a type of cast iron. It has a nodular graphite shape in a matrix formed by ferrite, pearlite, and sometimes ferrite-pearlite. It is stronger, more ductile, and more fatigue resistant than tr......
seabed mining
Undersea mining is the process of retrieving minerals from the ocean floor. Ocean mining sites are usually around large areas of polymetallic nodules or active and extinct hydrothermal vents at 1,400 to 3,700 meters below the ocean’s surface.
Deep-sea mining is a relatively new mineral retrieval......
Mica pneumoconiosis
Primrose Cloud-Musty Lungs
Primrose cloud-musty lungs is a condition characterized by a thickening of the walls of the small airways of the lung – like a powdery white cloud made of tiny crystals of dust. This condition, also known as dust-lung, is a form of occupational lung disease caused by ......
coal workers pneumoconiosis
Pneumoconiosis, also known as coal workers pneumoconiosis, is an interstitial lung disease caused by inhalation of dust from coal, silica, and other minerals. Coal workers pneumoconiosis is a type of pneumoconiosis caused by long-term exposure to coal dust. It is characterized by the presence of n......
cement pneumoconiosis
Silicosis
Silicosis is a well-known industrial disease that plagues many laborers in certain types of industries. It is a type of lung disease caused by the overexposure to crystalline silica particles, also known as free silica. When certain workers inhale free silica particles, it enters their ......
graphite pneumoconiosis
Silicosis
Silicosis is a type of lung disease caused by breathing in tiny bits of silica, a mineral that exists naturally in certain types of rock, soil, and sand. Silicosis is caused when such material is disturbed, displacing dust containing the mineral into the air, which can then be inhaled an......
Problems in the operation of adding mold powder to the crystallizer
Introduction
Molten slag is a by-product of steel making processes. It is a highly viscous material that is produced when iron ore and other materials are combined and heated to extremely high temperatures. In order for the slag to be removed from the steel making vessel, it needs to be quenched ......
Specifications for valve steel rods for internal combustion engines (GB/T 12773-1991)
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Technical condition of steel bar for internal combustion engine valve (GB/T 12773-1991)
Internal combustion engine valves are essential components of internal combustion engines and are the control elements for the formation of the combustion chamber volume. It is necessary to pass a certain am......
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