Analysis of shrinkage casting defects of special alloy gray cast iron
1. Tendency shrinkage defects of gray iron castings after processing In the process of design and development of gray iron […]
1. Tendency shrinkage defects of gray iron castings after processing In the process of design and development of gray iron […]
1. Metallographic comparison The metallographic structure comparison before and after the improvement of the process of producing nodular cast iron
1. Molding process The two box core molding is adopted, and the sand filling core under the side molding is
Figure 1 shows the simulation of velocity field of molten metal. It can be seen from figure 1A that the
In casting production, due to the uneven wall thickness of the gray cast iron cylinder head, it is easy to
CB2 cast steel is a 9%~12%cr martensitic heat-resistant steel with a composition of 0.13c-9cr-1.5mo-1co-vnbnb, which is obtained by reducing C,
C Si Mn P S Cu Sb Mgincomplete 3.43 2.09 0.42 0.020 0.010 0.65 0.005 0.045 According to the above
The characteristic of rotary disc sand mold casting is rectangular. The internal and external shapes of rotary disc sand mold
1. White mold making Due to the large size of the vacuum pump shell casting, the white mold of the
The flatness of compacted vermicular cast iron platen surface is also very high. Therefore, the deformation of compacted vermicular cast
1. Casting process Adopt the core assembly and vertical pouring process, pre assemble the base core, water jacket core, airway
1. Numerical simulation of bottom pouring inclined gating system in sand mold casting AnyCasting is used for numerical and simulation
1. Spheroidizing treatment Graphite distortion and fragment graphite will be produced in nodular cast iron with thick and large section
Figure 1 shows the relationship between the tensile strength, Brinell hardness and w (TI) content of the test sample, in
The working surface of the composite roll is the outer surface, that is, the outer layer should meet the requirements
1. Analysis of sand casting process The material of sand mold casting rotary disc is HT250, which is a medium-sized
Furan resin sand is used for three box modeling, and the parting method is shown in Figure 1. See Figure
According to the solidification sequence of impeller casting, the timely feeding of riser can not be obtained at the thick
1. Brushing method Brush the clean surface to be observed with mixed lime water, and block the through-hole within the
The content of C and Si is determined according to the carbon equivalent CE. Generally, the content of C is
CB2 cast steel is 9CrMoVNbB steel, and its trial produced steel castings have an extrapolated endurance strength of 85mpa at
1. Cause analysis According to the morphological analysis of the casting pore defects after dissection, it is mainly invasive pores,
Draw the 3D pouring model of impeller casting process in Pro / E software, output STL file, and import it
AnyCasting software was used to simulate the mold filling and solidification process of ductile iron punch disc casting process. The
Because the cast impeller is a medium-sized casting, its structure is relatively simple, and it is mass production. Its parting
1.Casting process plan HWS line green sand molding process is adopted, and the size of sand box is 1000 mm
As shown in Figure 1, the change of critical solid rate in the solidification process of lost foam castings after
1. Assign professional personnel to control production quality For enterprises, in order to obtain economic benefits, their products are required
Steel casting coating can be applied in various ways according to different site conditions and different steel castings. Through the
Internal shrinkage porosity and shrinkage cavity defects of nodular iron castings are common problems in the casting industry, and how