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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casting defects
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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
Scientific
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
Scientific
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
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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
Scientific
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,
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Casting defects of cast steel joints
The above research on the mechanical properties of cast steel joints and the mechanical properties of cast steel joint welds
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Slice test and casting defects of typical four branch cast steel joints
Ultrasonic flaw detection can only qualitatively analyze casting defects, but can not accurately describe defects. There are many scanning blind
Scientific
Formation mechanism of hot tears casting defects
The formation mechanism of hot tears casting defects mainly includes liquid film theory and strength theory. According to the liquid
Scientific
Determination of casting defect size of cast steel joint
According to the constancy of sound velocity propagation in the same medium and the proportional relationship between propagation distance and
Scientific
Morphology analysis of hot tears casting defects
The appearance characteristics of hot tears casting defects are that the tears propagates along the grain boundary, the appearance is
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Cracks and sand inclusion defects in steel castings
The causes of cracks and sand inclusion defects in motor shell steel castings are studied from the perspective of process
Scientific
Types and causes of casting defects of cast steel joints
Cast steel joints will inevitably produce some defects in the production process, such as hot crack, shrinkage cavity, delamination, slag
Scientific
Ultrasonic flaw detection of casting defects of medium and large steel castings
Ultrasonic flaw detection mainly detects the near surface and internal quality of steel castings, and the internal quality of steel
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Casting defects of cast steel joints
With the development of spatial structure, the span of structure is becoming larger and larger, and the forms are also