Effect of casting defects on strength of hydraulic valve body
With hydraulic valve body as carrier, the filling and solidification process of valve body casting were studied by combining theoretical […]
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casting defects
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Failure Analysis of Cast Hydraulic Valve Body
Hydraulic valves are subjected to complex and variable loads during their operation. Therefore, the strength of the valve body must
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Numerical simulation of casting defect formation of improved valve body
In the process of casting simulation, the pouring system, grid division and calculation conditions are the same as the above,
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Common casting defects of cast hydraulic valve body
The main valve holes of multi-way valves, change-over valves and other valves are thin, with many oil grooves and different
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Production defect analysis of brake caliper casting
1. Defect category identification According to the shape and location of the stoma, the defect was initially identified as subcutaneous
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Scab defect of grey cast iron engine block by green sand casting
The gray iron casting of a certain type of automobile engine block has a maximum outline dimension of 371mm ×
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Prevention of casting defects of pressure bearing base of 00bob cylinder
00bob cylinder is the key pressure bearing high temperature steel casting of supercritical steam turbine. Its function is to separate
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Causes and preventive measures of slag inclusion casting defects in nodular cast iron piston rings
The composition of slag inclusions is mainly composed of magnesium silicate, oxide, sulfide and sulfur oxide, which is a very
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Causes of shrinkage casting defects of nodular cast iron piston rings and preventive measures
Although the upper and lower wall thickness of the cylinder is relatively uniform when casting the nodular iron ring, the
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Brief introduction of casting defects of spiral bevel gear
Formation mechanism of shrinkage cavity and porosity during solidification of castings The volume shrinkage during solidification is the cause of
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Prevention method of porosity in cast iron
Cast iron castings often have various casting defects. How to prevent these defects has always been the concern of casting
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Causes and preventive measures of casting defects caused by air holes under the skin of nodular cast iron piston rings
In cylinder casting, the subcutaneous pores are mainly distributed at the position of L ~ zmrn under the outer circular
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Measures to prevent shrinkage and porosity in ductile iron casting
1.The content of carbon, silicon, manganese, rare earth and magnesium must be appropriate. High carbon content can reduce the tendency
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Defect characteristics, causes and prevention of insufficient elongation of castings
Causes: A. The composition of molten iron is unreasonable. B. Shrinkage cavity and porosity at the tensile position of the
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The spheroidizing decay defect of ductile iron casting and its prevention
The characteristics of spheroidization decline: good spheroidization before furnace, poor spheroidization on castings; or good spheroidization of castings poured first
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Improvement measures for cracks in low pressure casting of auto parts
1) The reasonable design of the riser, the heat preservation sleeve and the casting pouring system constitute the riser system,
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Influencing factors of crack formation in low pressure casting of automobile parts
In the casting of automobile parts, the wheel casting is a little different. Because it needs to meet a series
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Characteristics, causes and prevention of casting cold insulation defects
Features: The appearance of the casting is incomplete, with a crack like gap or broken flow, and the metal edge
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Defects of sand inclusion and scab in steel casting and preventive measures
Sand inclusion refers to that there is a layer of metal lump or sheet on the surface of the casting,
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Surface casting defects of die casting (part 3)
7 Discoloration and spots (1) characteristics: There are different colors and spots on the casting surface. (2) Causes: ① Improper
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Prediction of several main casting defects
1) Prediction of shrinkage porosity and porosity Shrinkage cavity and shrinkage porosity are the holes that appear when the temperature
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Surface casting defects of die casting (part 2)
4.Casting deformation (1) characteristics: ① Overall deformation or local deformation; ② the geometric drawing of the die casting is inconsistent.
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Surface casting defects of die casting (part 1)
1 casting strain (1) characteristics: ① Along the opening direction, the surface of the casting shows a line like scratch
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Prevention methods of non spheroidizing or bad spheroidizing defects of ductile iron parts
Features: the fracture surface of the casting is gray black, and the mechanical properties are obviously low. Through metallographic examination,
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Influence factors of die casting defects
Thinking of solving die casting defects Because the causes of each defect come from many different influencing factors, so in
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Prevention of graphite floatation defects in iron castings
Features: a layer of clear and dense black spots can be seen on the upper surface of the fracture surface
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Review the rationality of casting structure from the aspect of avoiding defects
The casting process of part structure usually refers to that the structure of the part itself should meet the requirements
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How to prevent the defect of broken fast graphite in ductile iron casting
(1) The influence of chemical composition on carbon equivalent is the biggest. In heavy section ductile iron, carbon equivalent should
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Common defects and prevention of metal mold casting
(1) Casting pinhole Measures to prevent pinholes: a. It is strictly prohibited to use polluted cast aluminum alloy materials, materials
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Causes and prevention of anti white defects in ductile iron casting
Anti whitemouth phenomenon On the section of iron castings, the opposite phenomenon of normal section appears. In the central part