During the development of the cylinder block in the early stage, it was found that there was shrinkage defect at the oil channel position by dissecting the cylinder block, as shown in the figure. After reviewing the production process, it was found that when the content of molten iron...
Body sampling is required for vermicular graphite cast iron cylinder block. The sampling location and standard requirements are shown in Figure 1 and Table 1. Through testing, the mechanical properties and metallographic structure of the compacted graphite cast iron cylinder block, each number represents a sample of the body,...
The 12 t medium-frequency furnace of ABP Company is used to smelt molten iron, and the charge ratio is 20%~30% of the return charge+70%~80% of the packed scrap. The packaging scrap uses FAW body scrap, with stable chemical composition, good consistency, low sulfur content, and a packaging size of...
The material grade of 16L vermicular cast iron cylinder block is RuT450, element C is detected by thermal analyzer, element S is detected by carbon and sulfur analyzer, and other elements are detected by spectrometer. Compared with gray cast iron, the shrinkage tendency of vermicular graphite cast iron is...
1. Selection of smelting process According to the material test results, the chemical composition of vermicular graphite cast iron cylinder block is formulated, as shown in Table 1. 500 kg spheroidizing ladle shall be used for tapping. 0.6% vermicular graphite cast iron vermicular agent and 0.6% inoculant (75 ferrosilicon)...
After the test, the macro fracture characteristics of the cylinder samples cast in each package were first checked. It was found that the fracture characteristics of the 1st to 3rd, 5th and 6th packages were similar to those of ductile iron, and the macro fracture characteristics of the other...
Mg RE Ca Si MgO 2 17.2 4.2 43.2 0.8 The test adopts 500 kg medium-frequency induction furnace melting, and the process of fusing vermicular cast iron. The vermicular cast iron is self-made, and the specific composition is shown in Table 1. The capacity of vermicular graphite cast iron...
High purity pig iron, scrap steel, ferrochromium, ferrovanadium, ferromolybdenum and other master alloys are selected. Copper and tin are added as pure metals and melted in a 20 t medium frequency induction furnace. Carburizing agent is used to adjust the carbon content of molten iron. After melting, raise the...
With the continuous development of marine low-speed diesel engine in the technical direction of high intensity, ultra-long stroke, ultra-high burst pressure and effective pressure, high output power and so on, the performance requirements of cylinder liner materials are also increasing. The traditional gray cast iron cylinder liner has low...
The effects of vibration frequency and molten iron treatment temperature on graphite morphology and primary phase of vermicular graphite cast iron in lost foam casting were studied. Vibration solidification and high liquid iron treatment temperature both make the graphite morphology of vermicular cast iron change from vermicular to vermicular...