Analysis of defect formation in counter gravity casting of large thin wall aluminum alloy plate
For the shrinkage porosity defect, it is opened at the defect position, as shown in the figure. It is found […]
For the shrinkage porosity defect, it is opened at the defect position, as shown in the figure. It is found […]
Because of the eccentric mass distribution, the error of the outer circle of the mold, the error of the outer
In the future automobile production, it is inevitable to realize low emission and lightweight. Therefore, we should try our best
When the pressure difference is enough (35kpa), the influence of chill thickness and casting thickness on defect formation is discussed.
In order to better verify the performance of the designed exhaust manifold, the exhaust manifold performance test is carried out,
The thickness of chill is designed according to the chill of gray iron casting, as shown in the formula Where
The research adopts the flat plate structure, the gap gating system and the low pressure pouring. The design of plate
The service conditions of ductile iron nuclear spent fuel container are harsh, the performance requirements are strict, especially the low
In order to solve various defects and problems of large section ductile iron castings, scholars at home and abroad have
First of all, in order to further compare the influence of the newly designed stamping and welding exhaust manifold and
The results show that tempering temperature has obvious effect on the quantity and morphology of carbides in 30cr13nb0.1 steel, which
In the overall optimization scheme, in order to improve the exhaust efficiency of the exhaust manifold, ensure that the exhaust
The effect of tempering temperature on the impact properties of 30cr13nb0.1 steel is shown in Fig. 1. It can be
In the design process, comprehensive consideration is needed. First of all, on the basis of the original exhaust manifold, the
It can be seen from the figure that with the increase of tempering temperature, the hardness of 30cr13nb0.1 steel first
For example, the original exhaust manifold of automobile engine is cast exhaust manifold, and its structure is shown in Fig.
The room temperature tensile strength and elongation of A1 and A2 alloys under different processes are shown in Fig. 1.
At present, the application scope of gasoline engine in our country is expanding, and because of the large reactive power
Fig. 1 shows the microstructure of 30cr13nb0.1 steel tempered at different temperatures. It is preliminarily judged that it is martensite
Establishment of 3D model and mesh generation The 3D model of die casting is carried out by Pro / E
Fig. 1 and Fig. 2 are SEM photos of microstructure of as cast samples of A1 and A2 alloys by
Fig. 1 and Fig. 2 show the SEM photos of as cast samples of A1 and A2 alloys without ultrasonic
In order to obtain the unique solution of hydrodynamics, not only the above basic equations, but also the boundary conditions
The ztap / HCCI composite grinding roller was successfully prepared by splicing several preforms and fixing them at the corresponding
Die casting, referred to as die casting, is a kind of precision casting method in which liquid or semi liquid
Take photos of the worn sample surface, import the pictures into image Pro Plus software, and identify and select the
Lightweight design of aerospace components is an important research direction in this field. Reducing the mass of aerospace components can
Figure 1 shows the XRD pattern of ztap / HCCI composite. The phases of the composites mainly include Al2O3 in
Test material and heat treatment process The ingot containing 0.117% Nb (mass fraction) was melted in 15 kg medium frequency
Figure (a) shows the overall metallographic structure (after heat treatment) of ztap / HCCI composite under optical microscope. The microstructure