Study on technology of nodular cast iron for automobile hub support based on magma
Starting from the practical application of sand casting production process, the process design and material properties of nodular cast iron […]
Starting from the practical application of sand casting production process, the process design and material properties of nodular cast iron […]
Figure 1 a) ~ g) shows the change process of mold filling temperature field of bottom injection trial production scheme.
The casting process of hub support is simulated and calculated by using magma simulation software, the shortcomings of the original
By individually adjusting the corresponding parameters of the example, we can intuitively understand the influence of these conditions on the
1. Solutions to “gap” casting defects After many tests, we finally understand that we must systematically match the three process
The causes of casting defects are all from the poor casting process design and structural design of the mold; The
Taking the circular casting defect with radius r as an example, the influence of the distance between the hole center
Under the action of alternating load, even if the stress amplitude is far less than the yield strength of the
The shape of casting defects includes a variety of irregular shapes, but the effect on stress concentration can be attributed
1.First process improvement and verification tracking (1) Change to bottom pouring system. The layout of the ingate of the casting
According to fracture mechanics, once the position of a certain point in the area near the top of the casting
1. Cold cracking casting defect Cold cracking casting defect refers to the crack caused by the casting stress greater than
After sampling the casting defect location, the scanning electron microscope was used for analysis. After ultrasonic cleaning, the casting defect
The cylinder head of a certain type of diesel engine produced by ZHY Casting factory has complex structure, compact layout,
For commonly used aluminum alloy materials, the crack propagation life and crack nucleation (initiation) life account for about 30% ~
As a common casting surface defect, sand inclusion casting defect often occurs in wet casting thick plate castings. Typical sand
As for the calculation of the stress intensity factor of casting defects, scholars have made a lot of efforts and
Porosity casting defect refers to the defect caused by the bubbles left in the casting before the liquid metal solidifies
With the continuous development and progress of casting technology, the casting structure under the new technical conditions has many advantages
Due to the liquid shrinkage and solid shrinkage of liquid metal during solidification, the holes formed at the last solidification
The single suction pump casing is a box type casting, and its structure is shown in the figure. Casting defects
According to the comparison of the numerical simulation results of the scheme, it is found that by reasonably increasing the
It can be found from the analysis that simply changing the height of the pouring riser of nodular cast iron
The material of a cast impeller is aluminum silicon alloy zalsi9cu2mg. The cast impeller is not allowed to have casting
With the development of industry, higher requirements are put forward for the performance and service life of structural parts made
Porosity casting defects are holes that appear in the interior or surface of the casting, and the cross section is
1. Improve the temperature field of castings Through the simulation of the overall temperature field of the casting with the
1. Tendency shrinkage defects of gray iron castings after processing In the process of design and development of gray iron
In casting production, due to the uneven wall thickness of the gray cast iron cylinder head, it is easy to
The internal shrinkage porosity and shrinkage cavity of the casting produced by the original lost foam casting process is relatively