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, […]
In the thick section of the casting, at the hot spot or the axis where the final solidification takes place, […]
Defect characteristics and detection methods There are gray white powder like spots or scabs on the thick parts of the
Features: During the molding operation, there is sand sticking on the formwork, and the mold cavity has such phenomena as
Inside, on or near the surface of the casting, there are smooth holes of different sizes, round, long and irregular
1.Porosity Casting defect characteristics Inside, on or near the surface of the casting, there are smooth holes with different sizes,
1) Identification of casting defects in sand casting Casting failure refers to the defect on the casting, incomplete outline shape,
1, Characteristics There are defects in some parts of the casting, which often appear in the thin-walled part, the farthest
1. EPC is suitable for the production of steel castings. Some measures can be taken to produce low carbon steel
Defect characteristics and detection methods It is an open hole or a dark hole embedded with molding materials on the
Various casting defects often occur in the production of steel castings. How to prevent these defects has always been the
1) Reasonable selection of casting alloy and casting structure. 2) Make reasonable technical requirements for castings (defects are allowed and
1.Porosity Features There are smooth holes of different sizes on the inner or surface of the casting. Main causes ①
Overview of electric globe valve: The electric stop valve is installed with electric actuator on the basis of the globe
The factors influencing the surface carburization of EPC steel casting include the composition of molten steel, the thickness of casting
Defect characteristics and detection methods The appearance is the striated or herringbone pits that are not closed by the alloy
1) Identification of wrong pattern in sand casting Wrong mold is the defect that one part of the casting and
In the production of steel castings by EPC, the surface carburization of castings has been a controversial topic. When EPS
Defect characteristics and detection methods Slag inclusions with gray and gray black fracture are often found in the parts or
Defect characteristics and detection methods Dark gray clusters or single distribution on the upper horizontal surface of the casting, or
Shrinkage cavity and porosity are the most common defects in castings. Shrinkage cavity is produced by poor feeding during solidification
Working principle of pneumatic globe valve: Pneumatic globe valve is a valve with compressed air as the power source. It
1) Reasonable design of liquid lifting system Because the holding time is too long, or the liquid in the lifting
Defect characteristics and detection methods It is a small round or fly shaped hole of different sizes with needle tip
Defect characteristics and detection methods Small holes in the surface and inside of the casting. Its surface is generally smooth,
In terms of shape, it is difficult to distinguish the blanks produced by these two processes. If you see a
There are many casting production processes, so it is easy to produce various defects. Some of the defective products can
Some people say that your casting is expensive, so you answer: Porsche and Land Rover are also very expensive, but
Bellows globe valve structure: The bellows globe valve is mainly changed from packing sealing to bellows sealing. The upper part
Basic knowledge of eccentric butterfly valve Eccentric butterfly valve can be divided into various types, generally single eccentric sealing butterfly
Structurally: The length of the gate valve is shorter than the globe valve, and the height is higher than the