According to the crack defect control measures of duplex stainless steel valve castings
1. Improve the concession of sand core In order to ensure that the high-temperature strength of the sand core of […]
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Design and parameter setting of gating system in investment casting
The pyramid lattice sandwich structure with core member length L = 32mm, core and panel angle w = 60 °
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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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Development of ductile iron valve castings
ZHY casting produced a batch of 500mm ductile iron valve castings for an enterprise in Japan. The valve is composed
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Casting technology of nodular cast iron valve
The quality requirements for nodular cast iron valve castings are very strict, the body spheroidization rate is above grade 3,
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Production of valve castings from as Cast Ferritic Ductile Iron
In recent years, with the continuous expansion of the market, the number of valve ductile iron parts in our factory
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Pattern, gating and riser combination and size control of lost foam casting for stainless steel valves
The gating system of stainless steel valve is designed with a variety of pouring methods, such as bottom injection, top
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Die casting technology of automobile engine cylinder block
Die casting technology uses the piston to fill the mold cavity with molten liquid metal at high pressure and high
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Process control of valve casting in Lost Foam Casting
1. Vibration modeling The sand used for lost foam casting of valve castings is dry sand without binder, which has
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Quality control of foam in Lost Foam Casting for stainless steel valves
1.Selection and pretreatment of foam raw materials EPMMA and STMMA foam are often used in stainless steel valve castings. The
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Design of decompression gating system for inner sprue in sand casting
As mentioned above, the open gating system is not conducive to slag retaining at the initial stage of pouring, and
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Effect of shell preheating temperature on shrinkage cavity and porosity of castings
Parameter setting: when the pouring temperature is 1550 ℃ and the pouring speed is 30mm / s, the shell preheating
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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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Cause analysis of main defects of valve casting scrap
(1) The guarantee ability of melting equipment to molten iron composition is poor and the stability of sand mixing equipment
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Statistics of valve casting scrap before process improvement
Valve castings are one of the leading products in castings, and the annual market demand is very large. However, due
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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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Research and development of key process of c12a valve casting and determination of process parameters
Through repeated trial production and continuous research and development in recent years, ZHY casting has accumulated mature production experience, applied
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Production of ZGCr5Mo high temperature and high pressure valve castings
ZHY casting produces 20 sets of 65j61y64i valves for a power plant. The medium of the valves is high-pressure steam
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Key technical specifications for c12a valve castings
ASME sa-217 c12a material is a high alloy heat-resistant steel. It is a new material developed by the United States.
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Design of gating system based on critical velocity theory in sand casting
John Campbell of the University of Birmingham and others have carried out a lot of research work on the design
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Study on sand casting technology of automobile engine parts
Three kinds of Dieless manufacturing processes, including laser selective sintering of coated sand, laser selective sintering of PS powder and
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Theoretical basis of mold filling and solidification process in investment casting
In the process of investment casting, solidification refers to the process that high-temperature liquid metal changes from liquid to solid
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Effect of pouring temperature on shrinkage cavity and porosity of castings
Parameter setting: when the pouring speed is 30mm / s and the shell preheating temperature is 600 ℃, the pouring
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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 analysis of investment casting of bearing support
The mechanical parts of topology design must have good manufacturability before the products have practical value. The product of topological
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Theoretical basis of mold filling process in investment casting
In the process of investment casting, although the movement of metal pouring fluid is very complex, it will strictly follow
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Design of gating system for traditional sand mold casting
(1) The minimum sectional area of gating system shall be determined. The minimum area of gating system is generally calculated
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Design of lost foam casting process simulation experiment
In the study of lost foam casting process, the process parameters that have a great impact on the quality of
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Impeller investment casting – sand casting check the pouring time according to the rising speed of liquid level
According to empirical parameters, when the wall thickness of impeller investment casting sand casting is > 40 mm, the minimum
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Matrix structure of lost foam casting and sand casting of gray cast iron
Figure 1 and Figure 2 show HT250 and HT200 gray cast iron respectively Φ The matrix structure of 30mm test