Effect of water-based zircon powder flow coating performance
When the dosage of HB type suspending agent is 1 phr, the suspending property has reached 97%. The surface strength […]
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The slag inclusion in ductile iron casting
There are three types of slag addition: the first type of coarse slag is 2mg · SiO2 + MGS or
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Prevention and treatment of the subcutaneous porosity in ductile iron casting
The following measures can be taken: (1) When wet casting is adopted, the moisture content in the sand must be
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Features, causes and prevention of the uneven hardness and coarse graphite defects of the castings
Features: Coarse graphite: the size of graphite in the metallographic structure is very large, or there is massive graphite, and
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Characteristics and remedy of cold crack and warpage in sand casting
Defect characteristics and detection methods 1.Cold crack It is also a straight or curved crack on the surface of the
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Defect characteristics, causes and prevention of lower core of casting
Features: Poor lower core (core deviation, core dropping, sand squeezing and core breaking) Causes: A. Mask is not adjusted well,
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Analysis on the defects of loose and under cast thin wall castings
When the wall thickness of high-temperature alloy castings such as adjusting piece and sealing piece is changed from 1.1mm to
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Characteristics and remedy of hot crack in sand casting
Defect characteristics and detection methods It is a straight crack on the casting. The surface of the crack is strongly
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The phenomenon and cause of air hole under the skin of ball milled cast iron
Phenomenon One of the most common defects in the production of nodular cast iron is subcutaneous porosity. Subcutaneous porosity is
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Characteristics and remedy of shrinkage defects in sand casting
Defect characteristics and detection methods 1.External shrinkage cavity It is a depression exposed on the casting. The rough formation of
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Characteristics and remedy of slag inclusion in flux of sand casting
Defect characteristics and detection methods The dregs are dark brown and irregular in shape near the inner gate and the
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Characteristics, causes and prevention of casting white edge defects
Features: The white cast is hard and brittle, and it is difficult to break and turn white Causes: A. Casting
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Casting shrinkage defects in engine cylinder block and cylinder head
The structure of cylinder block (cylinder head) casting is complex, and the wall thickness is quite different. The thick and
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Features, causes and prevention of casting connection defects
Features: After removing the riser, there is less meat in the neck of the riser. Causes: The shape and size
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Shrinkage and porosity defects of ductile iron casting and their prevention
The shrinkage porosity and porosity are more common in ductile iron than in ordinary gray iron. To prevent them, more
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Defects in the material properties of the engine cylinder block and cylinder head
Throughout the development trend of engine technology at home and abroad, we are pursuing to reduce the wall thickness of
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Characteristics, causes and prevention of casting porosity
Features: Invasive pore: the pore size is generally large, in the shape of round, ball or pear; the pear shaped
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Characteristics of die casting process
Die casting is a kind of metal mould pressure casting on die casting machine, which is the most efficient casting
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Internal casting defects of die casting (part 2)
6 Non metallic hard point (1) Features and inspection methods: In the process of machining or after machining, the appearance
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Defect characteristics and remedy of honeycomb in sand casting
Defect characteristics and detection methods A wormhole or loose hole appearing in the thick part of a casting or in
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The bad spheroidizing defect of ductile iron casting and its prevention
The bad spheroidization means that the spheroidization does not achieve the expected effect. The metallographic structure of poor spheroidization is:
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Characteristics, causes and prevention of shrinkage cavity and porosity in casting
Features: Shrinkage cavity: the hole with large volume, rough wall surface and irregular shape in the casting Shrinkage porosity: a
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Other defects of steel casting and preventive measures
1.Deformation Long and plate castings are easy to deform. After some castings are processed, they will deform after a period
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Characteristics of metal mold casting process
Metal mold casting is a modern technology of making hollow mold with heat-resistant alloy steel. The metal mold can be
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Internal casting defects of die casting (part 1)
1 Casting porosity (1) Features and inspection methods: After dissection, appearance inspection or flaw detection showed that the pores had
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Metallurgical quality and technological measures to prevent subcutaneous porosity of nodular cast iron
① Desulfurization treatment. The so-called desulfurization is to transfer the sulfur in the molten iron to the slag as much
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Characteristics of sand casting process
Sand casting is a kind of traditional casting technology which takes sand as the main molding material to make the
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Improvement measures for cracks in aluminum alloy wheel of low pressure casting
1) Reasonable design of liquid lifting system Because the holding time is too long, or the liquid in the lifting
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Defect characteristics and remedy of oxidation spot in sand casting
Defect characteristics and detection methods Fine wrinkles on the surface of casting or dark gray flakes peeling off from the
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Characteristics, causes and prevention of casting sand hole and sand squeeze defects
Features: A cavity or apparent lack of flesh containing sand particles on or within the surface of a casting Causes: