Lost foam casting is also called dry sand or negative pressure full mold casting, and its casting principle is shown in the figure. The foamed beads were made of pre foaming, aging and foaming molding, and the foam shape similar to the shape and size of the casting was...
Fig. 1 and Fig. 2 show the microstructure of as cast ZGMn13 and zgmn17 lost foam casting liner samples, respectively. It can be seen that the matrix of lost foam casting liner is austenitic structure, the grain is coarse as a whole, and the diameter is 200 ~ 600...
Lost foam casting Name: 105 type cable head; Material: ZG310-570; Geometric dimension: 620 mm × 290 mm × 210 mm； Single piece weight 107 kg; The wall thickness is uniform 50 mm, bridge steel cable suspension device and security parts; The material must meet the drawing requirements, the mechanical...
1. Test materials The test materials are as cast ZGMn13 high manganese steel and zgmn17 ultra-high manganese steel wear-resistant lining plate, which are produced by lost foam casting process (see Figure 1). The ultra-high manganese steel wear-resistant lining plate needs to be used under medium and low impact conditions...
There are two traditional solutions to the shrinkage defects of lost foam casting nodular iron castings. One is to set a riser at the hot spot to provide the liquid metal that needs to be compensated due to the volume change in the forming process of lost foam casting...
The inclusion of reducer housing is related to the process characteristics of lost foam casting nodular cast iron, which can not be completely eliminated. Only process means can be used to solve the inclusion defect. According to the inclusion of lost foam casting nodular cast iron reducer housing and...
The carbon content of ductile iron castings in lost foam casting is generally 3.5% ~ 3.8%, which is easy to produce carbon defect inclusions. Considering the gas evolution and carbon content, the copolymer is selected for the white mold of lost foam casting nodular cast iron. The copolymer balances...
Compared with gray cast iron, graphite in vermicular graphite cast iron is short and thick, curved and worm like. Because the density of vermicular graphite cast iron (i.e. the ratio of width and length of graphite shape i/d) is much larger than that of flake graphite in gray cast...
The simulation results of lost foam casting of the improved turbine rear exhaust nozzle are shown in the figure. It can be seen from the figure that the insufficient pouring phenomenon originally appeared on the top of the lost foam casting no longer appears due to the increase of...
In addition to ductile iron and gray iron, vermicular iron and white iron are commonly used as cast iron alloys. Vermicular graphite cast iron is a new type of cast iron alloy between nodular cast iron and gray cast iron, which combines the excellent properties of nodular cast iron...