Quality control of high temperature and high pressure valve castings
The process scheme is put into production after being determined by casting CAE simulation, and all valve castings are qualified […]
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casting defects
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Process requirements for high temperature and high pressure valve castings
The working environment of valve castings for petrochemical industry has the characteristics of high temperature, high pressure and hydrogen (including
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Optimization of investment casting process parameters to avoid casting defects
Pouring temperature, shell preheating temperature, investment casting pouring speed and other process parameters are very important to the molding quality
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Statistical analysis of scrap of valve castings after improvement
After the above improvement measures are taken, the waste of valve castings and the statistics of defect types are shown
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Improvement measures for main casting defects of waste valve castings
According to the causes of valve casting defects, we have taken improvement measures mainly from the following aspects: (1) Properly
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Prediction criterion of shrinkage cavity and porosity casting defects in investment casting
There are many reasons for casting defects. Gating system, pouring temperature and flow speed of molten liquid, casting size and
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Study on key process of c12a valve casting
The crack defects can be greatly reduced and eliminated by improving the main key process methods in the manufacture of
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Application status of computer simulation in Lost Foam Casting
Lost foam casting numerical simulation technology has become a powerful simulation and simulation technology, and goes deep into all aspects
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Analysis of mold filling process, solidification process and casting defects in investment casting of bearing support
As shown in Figure 1: after the investment casting pouring starts, the liquid fills the main sprue in about t
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Simulation of lost foam casting process
It mainly studies the lost foam casting of gearbox box, first carries out three-dimensional modeling, then carries out linear repair,
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Realization of numerical simulation of lost foam casting process with ProCAST software
ProCAST is a professional computer simulation software for optimizing lost foam casting process. We can use ProCAST simulation software to
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Classification of piston casting defects
Casting defect Cause Improvement measures Increase or decrease in outer diameter The external mold shrinks and deforms, the direction of
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Production technology of frame shell casting
ZHY casting has developed a frame shell casting with material grade of HT250 and overall dimension of 1300 mm ×
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Simulation results of casting defects in nodular cast iron process of hub support
As shown in the figure, the porosity results of numerical simulation of nodular cast iron are mainly used to judge
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Common casting defects and prevention methods
In the process of casting, various casting defects may be formed on the surface and inside of the casting due
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Defects in lost foam casting of large diameter thin wall ductile iron watch case
Under the same production conditions, the process yield and scrap rate of three different casting process schemes were obtained. Scheme
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Analysis and comparison of shrinkage cavity, porosity and solidification defects in sand casting
Shrinkage cavity in sand casting is a common casting defect, which is basically a volume loss defect. According to the
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Cause analysis of surface defects of AlMg10 alloy casting parts
It can be seen from the chemical composition analysis, microstructure metallography and SEM observation results of the part alloy that
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Mechanism and prevention of black spot defect on cast iron cylinder liner of diesel engine
Through comprehensive analysis of the test results, it can be seen that: (1) The slight difference of graphite morphology in
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Influence of centrifuge spindle vibration on black spot defect of diesel engine cast iron cylinder liner
The structure of horizontal centrifuge is simple, and abnormal vibration of centrifuge spindle occurs from time to time. The abnormal
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Effect of cooling and solidification conditions on black spot defect of cast iron cylinder liner of diesel engine
During the cooling and solidification process of cylinder liner, the cooling water from the outer wall metal mold and impacting
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Effect of inoculant on black spot defect of cast iron cylinder liner of diesel engine
Inoculant is added during the post-treatment of molten iron furnace, and the melting point of inoculant is generally 1300 ~
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Experimental study on black spot defect of cast iron cylinder liner of diesel engine
See Table 1 for the chemical composition of metal mold centrifugal casting vanadium titanium alloy gray cast iron cylinder liner.
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Formation mechanism of black spot defect on cast iron cylinder liner of diesel engine
The cast iron cylinder liner of diesel engine is generally produced by metal mold centrifugal casting. In production, it is
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Low pressure casting defects of aluminum alloy flywheel housing
The structure of the flywheel housing is relatively complex and belongs to a typical thin-walled shell structure. Due to the
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Low pressure casting technology of aluminum alloy flywheel housing
The flywheel housing is an extremely important power output component in the vehicle power system, and it is also a
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Casting process deformation defects of bed castings
Confirmation of the main factors affecting the casting process deformation defects of bed castings, track and observe the actual production
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Common defects of aluminum alloy lost foam casting
Lost foam casting technology is known as “casting technology in the 21st century” and “green revolution of casting industry”, which
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Improvement measures for casting process deformation defects of bed castings
1) In view of the insufficient stiffness of the bottom plate, a stiffener is added at the bottom of the
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Effect of microstructure hardness on black spot defect of diesel engine cast iron cylinder liner
Generally, the hardness of cylinder liner in the qualified layer is hb225 ~ HB240, and the overall hardness difference of