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 […]
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casting defects
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Defect analysis and optimization of steel castings for shell casting
The crack and sand inclusion of motor shell steel castings are the inertia quality problems in casting production, and they
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Formation of casting defects with tensile cracks in steel castings
The formation reason and process of tensile crack casting defect are different from that of shrinkage crack casting defect. 1)
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Casting defects of motor housing steel castings
From January to March 2020, ZHY Casting used the above process to produce 200 motor housings in small quantities. Basically,
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Casting defects of motor shell steel castings
The hot crack casting defects are analyzed from the macro and micro morphology. The hot crack can be divided into
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Production practice of carburizing defects of lost foam casting steel castings
In 2014, ZHY Casting introduced a small lost foam casting production line, mainly for the development of castings for waste
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Magnetic particle inspection for casting defects of medium and large steel castings
In the field inspection, we should focus on the parts prone to casting defects. According to my experience in the
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Casting defects such as non elimination of casting stress, improper cold shut and preheating
Fig. 1 and 2 fracture of anchor claw in drop test, which is visually characterized by brittle fracture. The main
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Defect analysis and process optimization of sand casting of steel castings
In view of the serious casting defects in the small batch production process of ZHY Casting motor shell steel castings,
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Formation mechanism of MNS inclusion defects in steel castings
The two kinds of MNS inclusion defects observed are formed on the surface of oxidized inclusions. According to the literature
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Characteristics of slag inclusion and sand hole defects in medium and large steel castings
Fig. 1 slag inclusion defect on the upper surface of medium and large steel castings after processing, which is visually
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Slag inclusion casting defects in lost foam casting of steel castings
Slag inclusion casting defect refers to the casting defect formed by dry sand, coating and other inclusions as molten iron
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Repair of casting defects of medium and large steel castings
Different from forged steel parts, steel castings for hull structure have low carbon content and good welding performance. Defective parts
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Characteristics of porosity and shrinkage defects in medium and large steel castings
Fig. 1 the visual characteristics of air hole defects on the upper surface of steel casting hub are round, the
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Improvement of casting defects of bolster and side frame steel castings
1. Improvement measures 1.1 Inspection and control of molding sand performance While maintaining the original test items and requirements of
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Sand inclusion and sticking defects of steel castings of bolster and side frame
Bolster and side frame are important running parts on the bogie of rail freight car. They bear the gravity of
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Study on Carburizing defects of lost foam casting steel castings
The lost foam casting method is flexible and convenient in modeling and pouring, especially for products with complex structure. lost