It can be seen from the experiment that in terms of mechanical properties, the mechanical properties of experimental gray cast […]
Through the observation of metallographic photos, the spheroidization level of a1-a8 and B1-B4 and the size level of nodular graphite
The figure shows the change law of impact toughness of nodular cast iron of B2 and B4 samples with temperature.
The figure shows the difference of mechanical properties of nodular cast iron of series a samples under as cast and
In addition to chemical composition, the influence of other production processes mainly refers to the influence of melting process, spheroidizing
Most of the gray cast iron used in engineering belongs to hypoeutectic gray cast iron. During crystallization, this gray cast
The main causes of poor plasma nitriding of precision casting parts are heat treatment temperature, heat treatment time, nitrogen concentration,
Bismuth can significantly increase the number of graphite spheres. When the number of graphite balls in nodular cast iron increases,
In order to reduce the process cost, the mold filling process and casting cooling process were studied respectively. The Nodular
Copper can promote the formation of pearlite structure, improve the uniformity of microstructure and properties of nodular cast iron, increase
The effects of silicon, copper and Bismuth on mechanical properties were analyzed. The figure shows the effect of silicon on
ProCAST software is used as sand mold casting simulation software to solve the interface heat transfer coefficient, but there are
During the sample preparation of nodular cast iron, the discharge temperature, pouring temperature, spheroidizing treatment time and total pouring time
The production process of nodular cast iron to be designed in the experiment mainly includes melting process, molding process, spheroidizing
The first Pouring Scheme of cylinder head – the temperature field distribution of sand casting with single side top injection
(1) Improvement scheme of sand casting process improvement measures for defects such as sand holes and pores are as follows.
Trace elements are interfering spheroidizing elements, but due to the neutralization effect of rare earth elements added in production, adding
After spheroidizing treatment, spheroidizing elements will make nodular cast iron have a greater tendency to white. At this time, inoculation
(1)Cu Copper plays an important role in controlling the matrix structure of as cast nodular cast iron. Adding copper is
According to the design of sand core, riser and gating system, the general assembly drawing and explosion drawing of sand
1.Influence of liquid iron level on mixing state in transition zone It can be seen from the experimental results that
Metallographic structure and scanning electron microscope observation of the alloy select the parts with serious corrosion and take samples along
Domestic research on low temperature impact toughness of nodular cast iron started late, but it has developed rapidly in recent
（1） Realize sequential solidification “Sequential solidification” is the basic process principle to prevent shrinkage cavity and porosity of castings. The
The research on the chemical composition of nodular cast iron provides a reliable basis for the composition design of the
All the mandatory clauses in the current nine mandatory national standards for foundry machinery have been integrated, streamlined and revised
Due to the improvement of cast iron performance requirements in various fields, we need to study how to prepare high-performance
Focusing on the low-temperature impact toughness of nodular cast iron, the relationship and influence between production technology, metallographic structure and
Heat treatment can change the matrix structure of nodular cast iron, eliminate the phenomenon of component segregation in the structure,
Low alloy steel has a wide application prospect because of its low content of alloying elements, low cost and excellent
