According to the characteristics of sand mold casting process, a low carbon evaluation model is proposed, which can effectively evaluate and quantify the resource utilization and environmental impact of casting process. In order to further improve the manufacturing sustainability aiming at low carbon, it is necessary to design and...
When the volume fraction of carbide with high hardness in the solidification structure of Cr based alloy is 20 ~ 35% and evenly distributed in the matrix, the wear resistance of the alloy is the best. These carbides can exist as eutectic carbides or primary carbides. The morphology of...
The whole contour of eutectic structure in hypereutectic chromium cast iron is very similar to that of Hypoeutectic and eutectic chromium white cast iron. The difference is that the primary phase is no longer austenite, but hexagonal primary carbide. Eutectic carbides grow continuously on primary carbides, and there is...
According to the different carbon content, the solidification structure of chromium alloys can be divided into hypoeutectic, eutectic and hypereutectic. The solidification of the alloy begins with the formation of primary phase, which may be austenite in hypoeutectic alloy or primary carbide in hypereutectic alloy, and then the two-phase...
The solidification structure of chromium alloys is closely related to the content of C and Cr in them. According to its different Cr content and application in different technical fields, it can be roughly divided into three categories (1) Low chromium cast iron Low chromium cast iron is defined...
At present, FDM / FEM integration is widely used in the calculation system of temperature and stress field in casting process, and more attention is paid to the unidirectional calculation process from temperature field to stress field. In fact, the stress and temperature in the casting process are influenced...
At present, there is a production line of a casting factory, with CNC multi axis grinding machine, mechanical arm, automatic transmission line and other equipment. According to the existing equipment, the process of the production line is planned. Firstly, the CNC multi axis grinding equipment is used as the...
1. Expensive equipment and high cost After investigation, it can be found that the reason why the grinding field has always been difficult to develop is that the core technology is mostly in the hands of foreign equipment manufacturers, and foreign sellers always have the intention to monopolize domestic...
1. Defect analysis of original process plan In the original process, two blind risers are set at positions a and B in Fig. 1, and the blind risers are sand mold risers. Due to the low feeding efficiency of sand mold riser and insufficient feeding liquid, shrinkage porosity occurs....
1.Runner 2. Runner cup 3. Riser 4, 5, 6. Ingate 7. Lap sheet 8. Sprue 9. Annular runner The original process scheme is shown in Fig. 1, using disa line vertical molding machine, designed as a stepped gating system, without sand core. The gating system consists of gate cup,...