Abstract This paper investigates the formation mechanisms of microcracks in thick and complex high manganese steel (ZGMn13) castings, taking a […]
Abstract: This paper presents a comprehensive analysis and repair process for the crack defects observed in ZG15Cr1Mo1V steel castings used
Abstract This comprehensive article delves into the challenges encountered in the production of hollow valve plate sand casting parts made
Valves, as a universal industrial component, are widely used, mainly in fields such as petroleum, chemical, petrochemical, water conservancy, metallurgy,
1. Location and shape of crack defects in cylinder block castings During the trial production process, cracks were found between
According to fracture mechanics, once the position of a certain point in the area near the top of the casting
1. Cold cracking casting defect Cold cracking casting defect refers to the crack caused by the casting stress greater than
With the implementation of the “Three Guarantees” responsibility system in the international automobile industry, the quality requirements of automobile parts
The main defects in the trial production of hook body and hook tongue parts are crack, air hole, sand inclusion
Although the wet mold clay sand has good concession and refrigeration, crack defects still appear from time to time in
The cracks of the motor shell are typical thermal cracks. There are more than 40 cracks and more than 80
The total number of cracks in the motor shell produced by furan resin sand casting process is about 70, while
The larger the hot brittle zone of the alloy, the greater the shrinkage of the casting in this temperature range,
The formation mechanism of hot tears casting defects mainly includes liquid film theory and strength theory. According to the liquid
The appearance characteristics of hot tears casting defects are that the tears propagates along the grain boundary, the appearance is
The causes of cracks and sand inclusion defects in motor shell steel castings are studied from the perspective of process
The formation reason and process of tensile crack casting defect are different from that of shrinkage crack casting defect. 1)
Most of the previous studies put forward the thermodynamic and dynamic conditions of hot crack formation from the perspective of
1) The fillet of steel casting belongs to the hot spot, which usually lags behind the solidification of other parts.
The formation mechanism and influencing factors of hot crack casting defects are very complex. So far, there are three main
Hot crack: the crack is an irregular curve, the inner surface is rough and black brown iron oxide. Cold crack:
1. Manifestations of cold crack defects Under the joint action of welding stress and other embrittlement factors, the bonding force
1.Improvement plan The existing tooling has been put into production, and the bottom injection process cannot be changed. Therefore, the
1. Improve the concession of sand core In order to ensure that the high-temperature strength of the sand core of
After ZHY casting received the order for the production of seawater swing check valve (as shown in Figure with nominal
There are many factors affecting the formation of quenching cracks in steel parts, mainly including metallurgy, structure, technology and so
There are many kinds of defects in heat treatment, and the causes are various. The causes of defects in heat
The air-conditioner of the defective product is mainly located at the highest point of the mold, i.e. 2 and 5
The results are as follows (1) Through spectral analysis, the chemical composition of the sample is more than the requirements
Cracks were found at the flange after machining, and the macro morphology of the cracks is shown in Fig. 1.
