Comparison of graphite morphology of gray cast iron
Comparing the graphite morphology of low carbon equivalent gray cast iron treated with different rare earth addition, it can be […]
Comparing the graphite morphology of low carbon equivalent gray cast iron treated with different rare earth addition, it can be […]
As shown in Figure 1, because the shape of casting defects in the node is irregular, the maximum value of
As a high-efficiency inoculant, rare earth has always occupied an important position in the application of inoculant, mainly because it
The cast track shoe of tractor is the most easily worn part on tractor and bulldozer. Its working conditions are
Ordinary gray cast iron is a kind of material with low price and wide application. Due to its poor corrosion
In the experiment, the molten iron of the same furnace is used to prepare gray cast iron according to the
The strength of gray cast iron depends on the type of graphite and matrix structure in its microstructure. When the
The flaw detection in the casting workshop mainly detects the superficial cracks of steel castings after pre normalizing and air
The selection of rare earth inoculated gray cast iron process depends on the addition method of inoculant, mainly including in
The main defects in the trial production of hook body and hook tongue parts are crack, air hole, sand inclusion
Draw the process drawing of sand casting according to the processing quantity and riser calculated before. Refer to attached Fig.
1.Liquidity test As shown in Figure 1, the experimental fluidity test adopts the method of single helix wet sample. The
The basic technological process of trial production of railway steel castings is introduced, the final technological scheme (serving the mass
By measuring the microstructure and mechanical properties of low carbon equivalent grey cast iron treated by different processes, the mechanism
The soul of gray cast iron is graphite. To study the properties of gray cast iron materials, we mainly study
The test piece shall be cut in the area where the casting defects are concentrated as far as possible in
From the solidification volume change model of nodular iron castings, we can get the following measures to guide the process
Four kinds of inoculants were selected in the experiment, which were 75sife, SRSI, basi, sisR (80%) and 75fesi (20%) composite
By measuring the casting properties of low carbon equivalent gray cast iron treated by different processes, the following conclusions are
The strength of gray cast iron mainly depends on graphite and matrix structure. With the increase of carbon equivalent, the
Nodular cast iron belongs to multi-element alloy, and the main influencing elements are Fe, C and Si. Its as cast
The modification effect of gray cast iron is affected by many factors, such as type, composition, size and oxidation degree
In the experiment, the medium frequency coreless crucible induction furnace is selected for the melting of gray cast iron. The
50KW medium frequency induction furnace was used for smelting in the test, with 25 kg charge per group.Proportioning principle: proportioning
Although the wet mold clay sand has good concession and refrigeration, crack defects still appear from time to time in
The comparative experiment of cutting performance of gray cast iron was carried out on CA6140 lathe, and the nsdn-45 °
By studying the changes of casting properties, metallographic structure and mechanical properties of low carbon equivalent grey cast iron under
1.Charge The quality of furnace charge mainly depends on the content of trace elements in raw materials. The trace elements
1.Interaction between rare earth and sulfur Sulfur can cause “hot brittleness” of cast iron during smelting of gray cast iron
The effect of checking the riser mainly includes the check of feeding range and feeding weight. One method to calculate