Figure 1 to figure 4 show the simulation analysis results of the hook tongue filling process.
Figure 1 shows the filling sequence and temperature analysis results of each part at different times during the filling process of the original hook tongue process. It can be seen from Figure 1 that the filling of molten steel is relatively stable, there is no obvious splash, and the fluidity of molten metal is good.
Figure 2 shows the flow velocity distribution during the mold filling process of the hook tongue original process. In actual production, a reasonable flow state can make the impurities in the liquid metal float up quickly, avoid air wrapping, reduce the oxidation of the liquid metal, and weaken the scouring of the liquid metal on the mold wall and the resulting defects such as sand flushing, slag inclusion and sand sticking.
It can be seen from Figure 2 that the flow velocity on both sides of the coupler knuckle pin hole facing the inner gate is large, especially on the side close to the coupler wrist. The sand core and mold are greatly impacted by liquid steel, and the erosion will be more serious. It is very easy to form sand flushing, slag inclusion and sand sticking defects at this place. This is the key stress part of the coupler knuckle, and the casting quality requirements are high, so it should be considered to avoid it.
Figure 3 shows the prediction results of retained gas in mold filling process. It can be seen from Figure 3 that the structure of the coupler tail stop is complex and is the last filling part, which is easy to form gas accumulation, poor exhaust and pore defects.
Figure 4 shows the distribution of filling time.