The as cast nodular iron with MS = 0.25cm, 0.50cm and 1.25cm were austenitized and water quenched respectively. Fig.1 shows […]
Carbon content in bovine eye ferrite The microstructure of as cast ductile iron with MS = 0.25cm consists of 73.7%
Chemical composition of nodular cast iron Qt400-18 nodular iron is selected for the study of austenitizing and austempering treatment in
When the high temperature molten iron is poured into the furan resin self hardening sand mold, the furan resin, curing
The design of sand core head of intake cylinder is the most important content in sand core design, and also
Sand cores are used to form the inner cavity, the hole and the parts that cannot be realized by the
Process design parameters are some parameters related to the pattern and core box manufacturing size, which have a direct impact
The casting process plan mainly includes the selection of molding method, pouring position and parting surface. The determination of casting
Parting surface refers to the contact surface of each casting mold which is divided into several segments. In practical production,
Through macroscopic observation and analysis of graphite floating, under the same wall thickness and pouring conditions of inlet cylinder, the
Visual observation of the test block section with a thickness of 400mm shows that there are dense distribution of suspected
According to the test results of shrinkage and porosity defects, the shrinkage and porosity defects are mainly concentrated on the
In order to study the effect of composition on the morphology of thick and large section graphite, bulk sampling was
After shot peening and grinding, ut test was carried out on the surface of the test block after sanding, and
In order to ensure that the experiment has accurate guidance for the inlet cylinder casting, the stepped shaped test block
The chemical composition directly affects the matrix structure and mechanical properties of nodular cast iron castings. Reasonable chemical composition is
(1) The elements with high content of C, O, Al, Si and some other alloy elements are found in the
By analyzing and mastering the proportional solidification technology of nodular cast iron into the cylinder, the cooling rate is changed
When the carbon content is increased to solve the shrinkage cavity and porosity defect, the top graphite floating and the
In theory, the whole process can be summarized into three important stages: primary shrinkage (liquid shrinkage), volumetric expansion (graphitization expansion)
The distribution of physical hot spots is special and the solidification process is complex. The distribution of hot spots directly
Casting hot spot refers to the local area of final solidification formed by the internal solidification speed being slower than
During ut inspection, the main defects exceeding the standard were shrinkage cavity and porosity defect. In the subsequent finishing process,
The whole process from molten iron smelting to casting completion is a complex and irreversible process. In the process of
① According to the ratio of cross-sectional area, it is divided into closed gating system and open gating system. The
① The main function of the sprue is to guide molten iron into the runner or runner. According to the
The molten iron enters the mold filling process through the gating system, which can be seen as a liquid with
The main characteristics of the magnetic traces of linear defects detected by MT are mainly linear aggregated magnetic traces with
The main features of magnetic traces of point defects detected by MT. The magnetic traces are scattered and isolated small
The inlet cylinder is one of the typical high difficulty ductile iron castings. Its solidification characteristics are closely related to
