Floating defect of graphite in ductile iron casting
Graphite floating means that there are a large number of graphite balls on the upper surface of the casting, and […]
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casting defects
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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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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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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, 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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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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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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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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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, 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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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:
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Shrinkage and porosity defects in steel casting and preventive measures
In the thick section of the casting, at the hot spot or the axis where the final solidification takes place,
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Defect characteristics, causes and prevention of casting draft
Features: During the molding operation, there is sand sticking on the formwork, and the mold cavity has such phenomena as
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Blowhole defects and preventive measures in steel casting
Inside, on or near the surface of the casting, there are smooth holes of different sizes, round, long and irregular
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Common casting defects and preventive measures
1.Porosity Casting defect characteristics Inside, on or near the surface of the casting, there are smooth holes with different sizes,
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Features, causes and prevention of insufficient casting defect
1, Characteristics There are defects in some parts of the casting, which often appear in the thin-walled part, the farthest
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Sand hole defects in steel casting and preventive measures
Various casting defects often occur in the production of steel castings. How to prevent these defects has always been the
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The major defects of common castings and their causes
1.Porosity Features There are smooth holes of different sizes on the inner or surface of the casting. Main causes ①
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Defects and remedial measures of stainless steel castings after heat treatment
For box type and trolley type resistance furnace plates, a high temperature tempering should be carried out before use, and
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Sand sticking defects in steel casting and preventive measures
On the surface of the casting, all or part of the surface is covered with a layer of metal (or
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The defect phenomenon and cause of the fast broken graphite in ductile iron casting
Fast graphite fragmentation The broken fast graphite is a kind of deformed graphite which often appears in the large end