Solidification characteristics of ductile iron casting
Nodular cast iron (ductile iron for short) is the 50th century A kind of high strength cast iron developed in […]
Nodular cast iron (ductile iron for short) is the 50th century A kind of high strength cast iron developed in […]
The flow rate W is defined as the metal weight passing through the cross-sectional area of the gating system within
Before designing the mold process, the natural properties of the parts should be analyzed, including weight, volume, surface area, number
The calculation of flow velocity at specific position of gating system is based on Torricelli formula of ideal free falling
According to the experimental results of the first two sections, the carburization defects will lead to the excessive chemical composition
The properties of tensile samples were tested by a universal testing machine controlled by microcomputer, and the tensile strength and
Six groups of samples were taken when analyzing surface carburization, and the location of the test point was changed to
In this test, 6 test pieces were poured in the same ladle of molten steel. The chemical composition of molten
In order to study the carburization defects of steel casting for bridge support, four sampling locations are selected, namely, near
The filling process of lost foam casting is the replacement process of metal liquid and foam pattern. Because the pouring
Using the process plan after the second optimization, the small batch production verification of steel and steel bearing was carried
When setting simulation parameters in ProCAST preprocessing section, the following aspects need to be adjusted: (1) The material of cold
The simulation results show that the safety height of riser is 11.15cm, which is 8.15cm higher than the minimum safety
It can be seen from Fig. 1 that when the pouring temperature changes from high to low, the safe height
The safety height of riser feeding is taken as the evaluation index in the orthogonal test. The measurement method of
The process parameters of lost foam casting have significant influence on the mechanical properties and the formation of carburizing defects.
The simulation parameters of vertical pouring scheme are consistent with those of horizontal pouring scheme, and other material configuration parameters
The steel and steel bearing trial produced by horizontal casting scheme is shown in Fig. 1. The overall appearance quality
The main functions of lost foam casting with negative pressure casting are as follows: (1) Compact the dry sand to
The feeding riser must be large enough to supply additional liquid metal during liquid shrinkage until the temperature drops below
Pouring temperature is a key factor affecting the quality of EPC Castings. If the pouring temperature is too high, the
The design of feeding system is the key content of this paper. We discussed the main factors that affect the
Drawing is to adjust the taper of the mold or casting surface so that the mold and product can be
Coating is an important part of lost foam casting process and one of the key factors affecting the filling of
The advantages of EPC are dry sand molding, no binder is needed, the recovery rate of dry sand is high,
A large amount of carbon in foam materials is the “arch criminal” of the carbon defect produced by EPC cast
In addition to bearing the load from the bridge, the bridge bearing is still in the changing environment, such as
Taking the steel damping bearing as the research object, because of the complex structure of the product, the calculation of
According to the function, the riser of lost foam casting process can be divided into feeding riser, exhaust slag collecting
By adopting ProCAST The simulation analysis of the horizontal pouring and vertical pouring scheme of the steel damping bearing is