Causes of cracks in duplex stainless steel valve castings
After ZHY casting received the order for the production of seawater swing check valve (as shown in Figure with nominal […]
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valve casting
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Determination of other process parameters of high temperature and high pressure valve casting
The production of ZHY casting steel castings adopts the chilled furan resin quartz sand process, and the chilled furan resin
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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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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 coating for valve castings
1. Coating performance requirements The selection of different formulations, components and the proportion of various components have a great impact
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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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Characteristics of lost foam casting valve body
After nearly half a century of development, lost foam casting technology has gradually entered a mature stage. Its products have
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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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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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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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Cause analysis of defects in lost foam casting process of original cast steel valve body
Fig. 1 and Fig. 2 are respectively solidification time nephogram and solid rate change diagram of ZY direction section plane
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Design of gating system for lost foam casting of cast steel valve body
According to the analysis of the original process scheme of the valve body, it can be seen that the improper
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2Crl3 stainless steel valve body
The strengthening and toughening treatment of 2Crl3 studied in the experiment takes the heat treatment process as a means and
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Basic information of casting product for a high class valve body
1. Product structure and technical requirements The diameter of valve body is ϕ 254 mm, the maximum outline size of
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Process improvement of valve plate defect of automobile gearbox in die casting production
1. Set ice pack and extend setting time appropriately Through X-ray examination and local dissection, it is found that the
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Analysis of defects of valve plate of automobile gearbox in die casting production
After adjusting the production conditions to the appropriate level, the batch trial production was carried out, and it was found
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Original production process for defects of valve plate of automobile gearbox in die casting production
1. Component classification block The structure of the valve plate of the automobile gearbox is complex and has a large
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Analysis of some defects of valve plate of automobile gearbox in die casting production
In recent years, with the promotion of energy saving and emission reduction, light weight and environmental protection in China, more
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Transmission device of high temperature resistant blind valve
The driving device adopts direct push electro-hydraulic push rod. The speed of the electro-hydraulic push rod is fast, up to
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Casting of high temperature resistant blind valve
The inside of valve plate also needs pouring refractory layer, and the minimum width of valve plate is determined according
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Structure design of high temperature resistant blind valve body
In order to isolate the high temperature of the pipeline, the high temperature resistant lining is poured inside the cylinder