NDT for casting defects of cast steel joints
According to the summary, a total of 50 casting defects were found in 24 cast steel joints, and the average […]
Scientific
casting defects
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Prediction of shrinkage porosity and cavity defects in numerical simulation solidification process
Shrinkage cavity and porosity defect is one of the most common defects in the casting process. The prediction of the
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Avoid shrinkage cavity and porosity defects of steel castings
Many parts of construction machinery such as bulldozers and excavators are cast steel castings, which often have shrinkage defects. Light
Scientific
Casting defects of coupler body in trial production of railway steel castings
The main casting defects of coupler body include crack, air hole, sand inclusion and mechanical sand sticking. The main parts
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Control of shrinkage cavity and porosity defects of steel castings
Different steel casting production processes determine different production processes, but they can be basically divided into process design, model making,
Scientific
Analysis of casting defects of steel castings
The steel castings were trial produced in two batches, and the first time was qualified, and the second time there
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Description of casting defects of steel castings
In order to verify the feasibility and universality of the proposed process design improvement method, three typical steel castings produced
Scientific
Shrinkage defects of castings of different materials
The shrinkage rates of several common iron carbon alloys are shown in the table. It can be seen from the
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Improvement of sand casting defects of steel castings
Through the production verification of product k141 and the implementation of lack of vision countermeasures, it can be seen that
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Comparison of different standards on the grade of casting defects
The acceptance specifications of steel castings have realized that the outer surface of steel castings is more important, because the
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Reduce casting defects
Casting is a process for producing products with liquid metal. The basic technology in mechanical industry includes manufacturing, welding, forging
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Causes of shrinkage defects in castings
The basic cause of concentrated shrinkage defects in castings is that the liquid shrinkage and solidification shrinkage of the alloy
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Production defect prevention of railway steel castings
Firstly, the basic process flow of trial production of coupler products, the main process equipment and process methods used by
Scientific
Influence of different China standards on defect grade of steel castings
In terms of detection methods, GB7233-09 focuses on the near-field area of ultrasonic flaw detection, and adds a near-field resolution
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Hot cracks defects caused by the structure of steel castings
The cracks of the motor shell are typical thermal cracks. There are more than 40 cracks and more than 80
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Sand casting crack defect
The total number of cracks in the motor shell produced by furan resin sand casting process is about 70, while
Scientific
Effect of internal cooling iron on the distribution of casting defects in steel castings
According to the previous casting simulation results, it is found that the process riser of the steel casting plant is
Scientific
Sand inclusion defect of steel castings
The sand inclusion casting defects of steel castings are relatively serious, because the proportion of product scrapping caused by sand
Scientific
Effect of different riser height on casting defect distribution of steel castings
The orthogonal experiment will be designed, the riser height is set as the independent variable, and other process parameters remain
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Evaluation of casting defect characteristics of cast steel joints
(1) Ultrasonic flaw detection of cast steel joints can not cover all flaw detection areas, nor can it completely and
Scientific
Casting sand inclusion defect
Casting sand inclusion defects are directly related to production process, mold, sand mixing, molding, core making, lower core box, pouring
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Characteristics of casting defects of cast steel joints
(1) Through the non-destructive testing of 24 cast steel joints, it is found that the distribution of casting defects seems
Scientific
Finite element analysis of cast steel joints with crack defects
According to the flaw detection results, there are many casting defects in the cast steel joints, and many casting defects
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Comparison of casting defect grade evaluation by different standards
The ultrasonic testing standard for carbon steel, low alloy steel and martensitic stainless steel castings (astm-609 / 609m), ultrasonic testing
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Influence of different casting systems on casting defect distribution of steel castings
According to the relative position of the internal sprue on the steel casting, the casting system can generally be divided
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Comparison of defect grade evaluation of steel castings in different China standards
The new and old specifications of steel castings in China, methods for ultrasonic flaw detection and quality assessment of steel
Scientific
Prediction of hot crack defects in steel castings
Hot crack defect refers to the casting defect when the solid rate of steel castings is close to 1.0 at
Scientific
Comparison of damage NDT results of typical four branch cast steel joints
In order to verify the nondestructive ultrasonic flaw detection test results of typical four branch cast steel joints, take four
Scientific
Slice test of typical four branch cast steel joints
1. Test purpose (1) The random characteristics of typical casting defects distribution of cast steel joints are analyzed; (2) Verify
Scientific
Effect of C, Si, Mn, P and s in alloy on hot tears casting defects
The larger the hot brittle zone of the alloy, the greater the shrinkage of the casting in this temperature range,