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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Development of valve casting industry in China
In recent years, the domestic pump and valve casting industry has developed rapidly, but there are still many problems in
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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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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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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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Casting technology in the production of China large steel castings
Large castings have long production cycle and complex processes. Generally, they have to go through many processes. Reasonable setting 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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Research status of investment casting
As a material near net shape technology, investment casting has the characteristics of complex casting structure, high dimensional accuracy, wide
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Simulation innovation of lost foam casting process
1) Because of the complex physical and chemical reaction between the front of the molten metal and the foam pattern
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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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Impeller casting shape and size
The shape and dimension inspection of impeller casting is to check whether the actual dimension of impeller blank casting falls
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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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Metal material smelting technology in the production of large steel castings
Large steel castings in the fields of nuclear power, hydropower, thermal power and metallurgical equipment have strict service conditions and
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Main contents of numerical simulation of lost foam casting
The change of field in each stage of lost foam casting forming process is calculated accurately, so as to obtain
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Design of rapid investment casting
Rapid investment casting (RIC) is a production process of indirect additive manufacturing (I-am) metal parts formed by the combination of
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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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Casting technology of large complex impeller
In view of the current situation that the production quality of large and complex integral stainless steel casting impeller can
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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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Dye penetrant inspection for appearance quality of impeller castings
Due to the thin and large number of impeller blade castings, in order to further inspect the surface and near
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The gap between China’s large steel casting production enterprises and foreign advanced enterprises
Compared with industrial developed countries, there is a big gap in the production of large steel castings in China in
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Casting process and performance test results of mechanical bearing pedestal
1. Impact performance For the performance test of mechanical bearing pedestal, it can be found that the impact absorption of
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Sand casting process design of automobile engine parts
At present, sand castings inside passenger car engines mainly include cylinder block, cylinder head, bearing cover, exhaust pipe, valve cover,