The main casting defects of coupler body include crack, air hole, sand inclusion and mechanical sand sticking. The main parts of the crack include the root of the pouring and riser, the hook shoulder, the corner of the complex curved surface of the hook head and so on. Figure...
1.Problem description Sand casting boom steel casting, steel casting No. 322232642, is an accessory of atlas process engineering machinery rock drill in the Netherlands. During the sampling inspection of small batch production after the preliminary trial production is qualified, it is found that some products have shrinkage defects locally,...
When designing steel castings, the sensitivity of the mechanical properties of cast alloys to the wall thickness of steel castings must be considered. When thick wall steel castings solidify at last, it is easy to produce defects such as shrinkage cavity (looseness), coarse grain and component segregation. Refer to...
The steel castings were trial produced in two batches, and the first time was qualified, and the second time there was shrinkage cavity and porosity defect. After investigating the five aspects of personnel, machines, materials, methods and links, since there are no abnormal changes, it is inferred that the...
The shrinkage rates of several common iron carbon alloys are shown in the table. It can be seen from the table that the shrinkage rate of carbon steel is the largest in the table. Material Science Pouring temperature / ° C C Si Mn P S Mg Shrinkage rate...
The graphite morphology of the two gray cast iron samples is shown in Figure 1. It can be seen from Figure 1 that the graphite morphology of the two kinds of alloyed gray cast iron is mainly fine, curved and evenly distributed type a graphite. In Fig. 1 (b),...
After any liquid metal is injected into the mold, it goes through three interrelated shrinkage stages from pouring temperature to normal temperature. These three stages are liquid shrinkage stage, solidification shrinkage stage and solid shrinkage stage. The liquid shrinkage stage refers to the cooling from pouring humidity to liquidus...
Thin wall structure accounts for more than 65%, the wall thickness of thin wall is 14-15mm, and the wall thickness of local thick wall is 53mm. The product diagram is shown in Figure 1. Figure 2 shows the local non-standard structure, with the hot joint diameter of 57.4mm. The...
After visual and magnetic particle flaw detection of cast steel joints, ultrasonic flaw detection shall be further carried out. Ultrasonic nondestructive testing results of 24 cast steel joints for civil engineering structures. A total of 36 casting defects were found in the ultrasonic flaw detection of 24 cast steel...
1. Model transformation and mesh generation The coupler body and sand casting process are modeled by proe and exported by Parasolid interface file format XT mesh file, import it into meshcast for finite element mesh generation, and get Mesh mesh file, with 95337 final face nodes and 443080 face...