Microstructure characteristics of Austempered Ductile Iron
The excellent properties of austempered ductile iron are closely related to its unique microstructure. The typical matrix structure of austempered […]
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Effect of pouring composition of nodular cast iron on morphology of thick and large section graphite
Through macroscopic observation and analysis of graphite floating, under the same wall thickness and pouring conditions of inlet cylinder, the
Scientific
Special shaped graphite in the center of Heavy Section Ductile Iron and its physical and chemical properties
Visual observation of the test block section with a thickness of 400mm shows that there are dense distribution of suspected
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Production verification of horizontal casting for medium speed diesel engine block
The casting process test of diesel engine block was carried out by using the process determined by analysis. The production
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Heat treatment process of high strength and high toughness cast lock ring for dredger
Dredger is a common dredger, working in sand and silt. It is generally used to excavate various kinds of silt,
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Analysis of the influence of the composition of nodular cast iron on shrinkage and porosity tendency
According to the test results of shrinkage and porosity defects, the shrinkage and porosity defects are mainly concentrated on the
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Design of exhaust system for horizontal casting of a medium speed diesel engine block
The exhaust system of large castings mainly considers the exhaust of mold cavity and sand core. It is difficult to
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Floating graphite on top of Heavy Section Ductile Iron
In order to study the effect of composition on the morphology of thick and large section graphite, bulk sampling was
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Horizontal casting process parameters and gating system of a medium speed diesel engine block
Combined with the production conditions and experience, the casting shrinkage is 1% in length direction, 0.8% in height direction and
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Effect of composition of nodular cast iron on shrinkage and porosity
After shot peening and grinding, ut test was carried out on the surface of the test block after sanding, and
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Casting melting composition and process setting
In order to ensure that the experiment has accurate guidance for the inlet cylinder casting, the stepped shaped test block
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Horizontal casting technology of a diesel engine block
The engine body is an 8-cylinder in-line structure. Its appearance is shown in Fig. 1 and its sectional view is
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Effect of chemical composition on casting properties of ductile iron
The chemical composition directly affects the matrix structure and mechanical properties of nodular cast iron castings. Reasonable chemical composition is
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Horizontal casting process of a medium speed diesel engine block
As the core part of diesel engine, the engine block carries all parts of the engine. Its working environment is
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Formation mechanism and prevention and control of main defects in nodular cast iron intake cylinder casting
(1) The elements with high content of C, O, Al, Si and some other alloy elements are found in the
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Over flow area of casting valve body for globe valve
The stop valve has five over-flow areas that need attention. According to the flow direction sequence, they are end channel
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Application of Proportional Solidification Technology of nodular cast iron in prevention and control of shrinkage cavity and porosity
By analyzing and mastering the proportional solidification technology of nodular cast iron into the cylinder, the cooling rate is changed
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Processing technology of casting valve body for globe valve
The independent valve seat of the globe valve is usually connected by welding. Because the welding rod should go deep
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Formation mechanism and causes of metallographic defects in special parts of ductile iron
When the carbon content is increased to solve the shrinkage cavity and porosity defect, the top graphite floating and the
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Construction standard for cast body of globe valve
According to the current standard API 623-2013 “steel globe valves – Flanged and butt welded ends, bolted bonnet”, bs1873-1975 “steel
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Solidification theory of isolated hot spot and thick section of nodular cast iron intake cylinder
In theory, the whole process can be summarized into three important stages: primary shrinkage (liquid shrinkage), volumetric expansion (graphitization expansion)
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Structure design of casting valve body for globe valve
Stop valve is an indispensable fluid control product in modern industry, which plays a role of cutting off and throttling
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Volume change curve of nodular cast iron during solidification
The distribution of physical hot spots is special and the solidification process is complex. The distribution of hot spots directly
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Hot spot distribution analysis of nodular cast iron in Cylinder Casting
Casting hot spot refers to the local area of final solidification formed by the internal solidification speed being slower than
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Forming mechanism and prevention and control measures of shrinkage defects of nodular cast iron in cylinder
During ut inspection, the main defects exceeding the standard were shrinkage cavity and porosity defect. In the subsequent finishing process,
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Molten iron melting and test block preparation
(1) Preparation of main metal charge Weigh and prepare the main metal charge. (2) Preparation of main accessories Weigh and
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Application of ductile iron gating system in prevention and control of surface slag inclusion defects
The whole process from molten iron smelting to casting completion is a complex and irreversible process. In the process of
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Classification of common gating system for ductile iron cylinder
① According to the ratio of cross-sectional area, it is divided into closed gating system and open gating system. The
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Formation of slag inclusion on the surface of nodular cast iron cylinder
The main defect of the inlet cylinder casting in the NDT of VT, MT and Pt is that there are
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The defect detection method of the nodular cast iron into the cylinder
(1) The surface quality and defects of the air inlet cylinder are mainly inspected by visual inspection (VT), magnetic particle