The air-conditioner of the defective product is mainly located at the highest point of the mold, i.e. 2 and 5 turns (as shown in Fig. 1, the dark position). Through the simulation and analysis, it is found that the filling speed of the mold becomes slower, the filling ability...
The results are as follows (1) Through spectral analysis, the chemical composition of the sample is more than the requirements of GB / t5216-2014. In sample 1, the chemical composition was analyzed by three times direct reading spectrum. The content of C element (mass fraction,%) was 1.5, 0.5 and...
Cracks were found at the flange after machining, and the macro morphology of the cracks is shown in Fig. 1. After analysis, the location of crack source is indicated in Fig. 1. Samples are cut around the crack, and the sample numbers are sample 1 and 2. The sampling...
Casting porosity This is a small cavity formed by the gas which can not escape during the solidification of metal. The inner wall of the cavity is smooth and contains gas. It has a high reflectivity to the ultrasonic wave. However, because it is basically spherical or ellipsoidal, that...
Features: the surface of the casting has straight or curved cracks. There are two kinds of cracks: hot crack and cold crack. Most of the hot cracks are zigzag and irregular, and the surface of the fracture is light black with deep oxidation color. The crack of cold crack...