On March 17, 2017, under the support of the National Science and Technology Major Project of "Large-scale Advanced PWR and HTGR Nuclear Power Station", the hydrostatic test of Reactor Pressure Vessel of CAP1400 Demonstration Project was successfully completed.
The hydrostatic test design pressure of 17.2MPa, the hydrostatic test is divided into pressure vessel body hydrostatic test and internal and external O-ring leak test two stages, the overall hydrostatic test pressure of 21.5MPa, dwell time of 10 minutes, During the pressure drop to 17.2MPa, the inner and outer O-ring leak test, the indicators during the hydraulic test are in line with design requirements, the whole no leakage, sweating and so on.
The hydrostatic test was successfully completed in one go, which indicates that the CAP1400 reactor pressure vessel designed and developed by China has achieved localization and laid a solid foundation for the batch construction of the third generation nuclear power.
Reactor pressure vessel is the core equipment of a nuclear power plant. It is the most important safety barrier that does not contain radioactive substances and can not be replaced within 60 years of life. Its advanced nature is crucial to ensure the safety and reliability of the operation of a nuclear power plant. The reactor pressure vessel independently designed by the State Nuclear Power Shanghai Nuclear Institute independently manufactured by China, using integrated roof and integrated bottom seal, reducing the number of welds, greatly reducing the workload of in-service inspection and improve the nuclear power Plant safety and economy. In addition, the reactor pressure vessel forging diameter size, high performance requirements, the overall weight, is the world's most demanding nuclear-level master one.
Investment casting can make use of most metals, most commonly using steel alloys, carbon steel,stainless steel, and tool steel. This process is beneficial for casting metals with high melting temperatures that can not be molded in plaster or metal. Parts that are typically made by investment casting include those with complex geometry such as turbine blades or firearm components. High temperature applications are also common, which includes parts for the automotive, aircraft, and military industries.
Our products cover a wide range of industries including train & Railway, automobile & Truck, construction machinery, mining machinery, forklift, agricultural machinery, shipbuilding, petroleum machinery, construction, valve and pumps, electric machine, hardware, power equipment and so on. We are capable to produce products according to customers' drawings or samples, we focus on both carbon steel and alloy steel. Up to today, more than 100 raw materials and 5, 000 kinds of different products have been developed and produced by us. We are familiar with the material standards of many countries, such as Chinese GB, American ASTM, AISI, German DIN, French NF, Japanese JIS, British BS, Australian AS and Association of American Railroads (AAR ) and other industrial standards.
The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 3 tons and aluminium castings of up to 100 kg. It is generally more expensive per unit than Die Casting or Sand Casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.
Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Blades produced by investment casting can include single-crystal (SX), directionally solidified (DS), or conventional equiaxed blades. It is also widely used by firearms manufacturers to fabricate firearm receivers, triggers, hammers, and other precision parts at low cost. Other industries that use standard investment-cast parts include military, medical, commercial and automotive.
Investment casting offers high production rates, particularly for small or highly complex components, and extremely good surface finish (CT4-CT6 class accuracy and Ra1.6-6.3 surface roughness) with very little machining. The drawbacks include the specialized equipment, costly refractories and binders, many operations to make a mold, and occasional minute defects.
Material:
Alloy Steel:ASTM 430;ASTM410;ASTM 416,ect.Carbon
Steel:WCB,AISI1020;AISI1045;S355J2G3,S235JR,ect.
Stainless Steel:SS304;SS316;SS316L;17-4 PH;ect.Copper:C21000;C26800;C27000;C27200,ect.
Advantage
Can form complex shapes and fine details Many material optionsHigh strength partsVery good surface finish and accuracyLittle need for secondary machining
Applications:
Turbine blades, armament parts, pipe fittings, Lock Parts , handtools, agriculture parts,Marine Parts,medical parts,hardware,automobile parts,ect.
Investment Casting,Investment Casting Materials,Impeller Investment Casting,Wax Investment Casting
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